<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_colb_AccumulatedOtherComprehensiveIncomeAbstract_0D5D026F1B4A964769915B4F09314C19_label_en-US" xlink:label="lab_colb_AccumulatedOtherComprehensiveIncomeAbstract_0D5D026F1B4A964769915B4F09314C19" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income [Abstract]</link:label>
    <link:label id="lab_colb_AccumulatedOtherComprehensiveIncomeAbstract_0D5D026F1B4A964769915B4F09314C19_documentation_en-US" xlink:label="lab_colb_AccumulatedOtherComprehensiveIncomeAbstract_0D5D026F1B4A964769915B4F09314C19" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AccumulatedOtherComprehensiveIncomeAbstract" xlink:label="loc_colb_AccumulatedOtherComprehensiveIncomeAbstract_0D5D026F1B4A964769915B4F09314C19" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AccumulatedOtherComprehensiveIncomeAbstract_0D5D026F1B4A964769915B4F09314C19" xlink:to="lab_colb_AccumulatedOtherComprehensiveIncomeAbstract_0D5D026F1B4A964769915B4F09314C19" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_89ABE4E41311D504B8875B4F0931B33E_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_89ABE4E41311D504B8875B4F0931B33E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_89ABE4E41311D504B8875B4F0931B33E_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_89ABE4E41311D504B8875B4F0931B33E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_89ABE4E41311D504B8875B4F0931B33E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_89ABE4E41311D504B8875B4F0931B33E" xlink:to="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_89ABE4E41311D504B8875B4F0931B33E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_E61FFEA0DE19711FB1CF5B4F0931663B_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_E61FFEA0DE19711FB1CF5B4F0931663B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_E61FFEA0DE19711FB1CF5B4F0931663B_label_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_E61FFEA0DE19711FB1CF5B4F0931663B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_E61FFEA0DE19711FB1CF5B4F0931663B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_E61FFEA0DE19711FB1CF5B4F0931663B" xlink:to="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_E61FFEA0DE19711FB1CF5B4F0931663B" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableNetAbstract_D66028A4F963BAA4E8640759022035E5_label_en-US" xlink:label="lab_us-gaap_LoansReceivableNetAbstract_D66028A4F963BAA4E8640759022035E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable, Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableNetAbstract" xlink:label="loc_us-gaap_LoansReceivableNetAbstract_D66028A4F963BAA4E8640759022035E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableNetAbstract_D66028A4F963BAA4E8640759022035E5" xlink:to="lab_us-gaap_LoansReceivableNetAbstract_D66028A4F963BAA4E8640759022035E5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivablesTextBlock_5BA1B7436FE4C21AA7A707590220EF2F_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesTextBlock_5BA1B7436FE4C21AA7A707590220EF2F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivables [Text Block]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablesTextBlock_5BA1B7436FE4C21AA7A707590220EF2F_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesTextBlock_5BA1B7436FE4C21AA7A707590220EF2F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivables [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivablesTextBlock" xlink:label="loc_us-gaap_FinancingReceivablesTextBlock_5BA1B7436FE4C21AA7A707590220EF2F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesTextBlock_5BA1B7436FE4C21AA7A707590220EF2F" xlink:to="lab_us-gaap_FinancingReceivablesTextBlock_5BA1B7436FE4C21AA7A707590220EF2F" xlink:type="arc" />
    <link:label id="lab_us-gaap_GeneralDiscussionOfDerivativeInstrumentsAndHedgingActivitiesAbstract_31FD7D88C61AEB6ECFAF5B4F0A3A3DAE_label_en-US" xlink:label="lab_us-gaap_GeneralDiscussionOfDerivativeInstrumentsAndHedgingActivitiesAbstract_31FD7D88C61AEB6ECFAF5B4F0A3A3DAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">General Discussion of Derivative Instruments and Hedging Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeneralDiscussionOfDerivativeInstrumentsAndHedgingActivitiesAbstract" xlink:label="loc_us-gaap_GeneralDiscussionOfDerivativeInstrumentsAndHedgingActivitiesAbstract_31FD7D88C61AEB6ECFAF5B4F0A3A3DAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeneralDiscussionOfDerivativeInstrumentsAndHedgingActivitiesAbstract_31FD7D88C61AEB6ECFAF5B4F0A3A3DAE" xlink:to="lab_us-gaap_GeneralDiscussionOfDerivativeInstrumentsAndHedgingActivitiesAbstract_31FD7D88C61AEB6ECFAF5B4F0A3A3DAE" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeTable_79B0715CAD68EBD5D8EE5B4F0A3A94E8_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeTable_79B0715CAD68EBD5D8EE5B4F0A3A94E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative [Table]</link:label>
    <link:label id="lab_us-gaap_DerivativeTable_79B0715CAD68EBD5D8EE5B4F0A3A94E8_label_en-US" xlink:label="lab_us-gaap_DerivativeTable_79B0715CAD68EBD5D8EE5B4F0A3A94E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeTable" xlink:label="loc_us-gaap_DerivativeTable_79B0715CAD68EBD5D8EE5B4F0A3A94E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeTable_79B0715CAD68EBD5D8EE5B4F0A3A94E8" xlink:to="lab_us-gaap_DerivativeTable_79B0715CAD68EBD5D8EE5B4F0A3A94E8" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4769B44AAF9F499F6CAA5B4F0A3A2C1B_verboseLabel_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4769B44AAF9F499F6CAA5B4F0A3A2C1B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Securities or Other Assets Sold under Agreements to Repurchase [Axis]</link:label>
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4769B44AAF9F499F6CAA5B4F0A3A2C1B_label_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4769B44AAF9F499F6CAA5B4F0A3A2C1B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities or Other Assets Sold under Agreements to Repurchase [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis" xlink:label="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4769B44AAF9F499F6CAA5B4F0A3A2C1B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4769B44AAF9F499F6CAA5B4F0A3A2C1B" xlink:to="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4769B44AAF9F499F6CAA5B4F0A3A2C1B" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseTypeDomain_5D0272A9CD572CBDBCEE5B4F0A3AB577_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseTypeDomain_5D0272A9CD572CBDBCEE5B4F0A3AB577" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseTypeDomain_5D0272A9CD572CBDBCEE5B4F0A3AB577_label_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseTypeDomain_5D0272A9CD572CBDBCEE5B4F0A3AB577" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseTypeDomain" xlink:label="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseTypeDomain_5D0272A9CD572CBDBCEE5B4F0A3AB577" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseTypeDomain_5D0272A9CD572CBDBCEE5B4F0A3AB577" xlink:to="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseTypeDomain_5D0272A9CD572CBDBCEE5B4F0A3AB577" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableforsaleSecuritiesMember_40400AEE2D8620DA4BC55B4F0A3AF6CE_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableforsaleSecuritiesMember_40400AEE2D8620DA4BC55B4F0A3AF6CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities [Member]</link:label>
    <link:label id="lab_us-gaap_AvailableforsaleSecuritiesMember_40400AEE2D8620DA4BC55B4F0A3AF6CE_label_en-US" xlink:label="lab_us-gaap_AvailableforsaleSecuritiesMember_40400AEE2D8620DA4BC55B4F0A3AF6CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableforsaleSecuritiesMember" xlink:label="loc_us-gaap_AvailableforsaleSecuritiesMember_40400AEE2D8620DA4BC55B4F0A3AF6CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableforsaleSecuritiesMember_40400AEE2D8620DA4BC55B4F0A3AF6CE" xlink:to="lab_us-gaap_AvailableforsaleSecuritiesMember_40400AEE2D8620DA4BC55B4F0A3AF6CE" xlink:type="arc" />
    <link:label id="lab_us-gaap_HedgingDesignationAxis_D6DEA768B7269D7993BF5B4F0A3A4BB7_terseLabel_en-US" xlink:label="lab_us-gaap_HedgingDesignationAxis_D6DEA768B7269D7993BF5B4F0A3A4BB7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hedging Designation [Axis]</link:label>
    <link:label id="lab_us-gaap_HedgingDesignationAxis_D6DEA768B7269D7993BF5B4F0A3A4BB7_label_en-US" xlink:label="lab_us-gaap_HedgingDesignationAxis_D6DEA768B7269D7993BF5B4F0A3A4BB7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hedging Designation [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_D6DEA768B7269D7993BF5B4F0A3A4BB7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HedgingDesignationAxis_D6DEA768B7269D7993BF5B4F0A3A4BB7" xlink:to="lab_us-gaap_HedgingDesignationAxis_D6DEA768B7269D7993BF5B4F0A3A4BB7" xlink:type="arc" />
    <link:label id="lab_us-gaap_HedgingDesignationDomain_579F213EB84F0EDF68315B4F0A3A48DF_terseLabel_en-US" xlink:label="lab_us-gaap_HedgingDesignationDomain_579F213EB84F0EDF68315B4F0A3A48DF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hedging Designation [Domain]</link:label>
    <link:label id="lab_us-gaap_HedgingDesignationDomain_579F213EB84F0EDF68315B4F0A3A48DF_label_en-US" xlink:label="lab_us-gaap_HedgingDesignationDomain_579F213EB84F0EDF68315B4F0A3A48DF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hedging Designation [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_579F213EB84F0EDF68315B4F0A3A48DF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HedgingDesignationDomain_579F213EB84F0EDF68315B4F0A3A48DF" xlink:to="lab_us-gaap_HedgingDesignationDomain_579F213EB84F0EDF68315B4F0A3A48DF" xlink:type="arc" />
    <link:label id="lab_us-gaap_NondesignatedMember_AAF3EA1908E763816A225B4F0A3AB1AC_label_en-US" xlink:label="lab_us-gaap_NondesignatedMember_AAF3EA1908E763816A225B4F0A3AB1AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Not Designated as Hedging Instrument [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_AAF3EA1908E763816A225B4F0A3AB1AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NondesignatedMember_AAF3EA1908E763816A225B4F0A3AB1AC" xlink:to="lab_us-gaap_NondesignatedMember_AAF3EA1908E763816A225B4F0A3AB1AC" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeLineItems_451C80746B5A0CD2B73F5B4F0A3AEB6B_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLineItems_451C80746B5A0CD2B73F5B4F0A3AEB6B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative [Line Items]</link:label>
    <link:label id="lab_us-gaap_DerivativeLineItems_451C80746B5A0CD2B73F5B4F0A3AEB6B_label_en-US" xlink:label="lab_us-gaap_DerivativeLineItems_451C80746B5A0CD2B73F5B4F0A3AEB6B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="loc_us-gaap_DerivativeLineItems_451C80746B5A0CD2B73F5B4F0A3AEB6B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLineItems_451C80746B5A0CD2B73F5B4F0A3AEB6B" xlink:to="lab_us-gaap_DerivativeLineItems_451C80746B5A0CD2B73F5B4F0A3AEB6B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_8A0F3332A35F156DC1565B4F0A3AFEAB_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_8A0F3332A35F156DC1565B4F0A3AFEAB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value Derivative Instruments</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_8A0F3332A35F156DC1565B4F0A3AFEAB_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_8A0F3332A35F156DC1565B4F0A3AFEAB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_8A0F3332A35F156DC1565B4F0A3AFEAB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_8A0F3332A35F156DC1565B4F0A3AFEAB" xlink:to="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_8A0F3332A35F156DC1565B4F0A3AFEAB" xlink:type="arc" />
    <link:label id="lab_colb_BalanceSheetOffsettingTableTextBlock_245218F65BE52C1F58A25B4F0A3ACD06_terseLabel_en-US" xlink:label="lab_colb_BalanceSheetOffsettingTableTextBlock_245218F65BE52C1F58A25B4F0A3ACD06" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balance Sheet Offsetting [Table Text Block]</link:label>
    <link:label id="lab_colb_BalanceSheetOffsettingTableTextBlock_245218F65BE52C1F58A25B4F0A3ACD06_label_en-US" xlink:label="lab_colb_BalanceSheetOffsettingTableTextBlock_245218F65BE52C1F58A25B4F0A3ACD06" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balance Sheet Offsetting [Table Text Block]</link:label>
    <link:label id="lab_colb_BalanceSheetOffsettingTableTextBlock_245218F65BE52C1F58A25B4F0A3ACD06_documentation_en-US" xlink:label="lab_colb_BalanceSheetOffsettingTableTextBlock_245218F65BE52C1F58A25B4F0A3ACD06" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Table Text Block] for Balance Sheet Offsetting [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BalanceSheetOffsettingTableTextBlock" xlink:label="loc_colb_BalanceSheetOffsettingTableTextBlock_245218F65BE52C1F58A25B4F0A3ACD06" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BalanceSheetOffsettingTableTextBlock_245218F65BE52C1F58A25B4F0A3ACD06" xlink:to="lab_colb_BalanceSheetOffsettingTableTextBlock_245218F65BE52C1F58A25B4F0A3ACD06" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_D62F61C66D019506767A5B4F0A3A3D57_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_D62F61C66D019506767A5B4F0A3A3D57" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_D62F61C66D019506767A5B4F0A3A3D57_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_D62F61C66D019506767A5B4F0A3A3D57" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock" xlink:label="loc_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_D62F61C66D019506767A5B4F0A3A3D57" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_D62F61C66D019506767A5B4F0A3A3D57" xlink:to="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_D62F61C66D019506767A5B4F0A3A3D57" xlink:type="arc" />
    <link:label id="lab_colb_SubordinateddebenturesAbstract_E3F6C1185045C7F070B25B4F0856FAD1_label_en-US" xlink:label="lab_colb_SubordinateddebenturesAbstract_E3F6C1185045C7F070B25B4F0856FAD1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated debentures [Abstract]</link:label>
    <link:label id="lab_colb_SubordinateddebenturesAbstract_E3F6C1185045C7F070B25B4F0856FAD1_documentation_en-US" xlink:label="lab_colb_SubordinateddebenturesAbstract_E3F6C1185045C7F070B25B4F0856FAD1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Subordinated debentures [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_SubordinateddebenturesAbstract" xlink:label="loc_colb_SubordinateddebenturesAbstract_E3F6C1185045C7F070B25B4F0856FAD1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_SubordinateddebenturesAbstract_E3F6C1185045C7F070B25B4F0856FAD1" xlink:to="lab_colb_SubordinateddebenturesAbstract_E3F6C1185045C7F070B25B4F0856FAD1" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubordinatedBorrowingTable_B1B7325F83BBE511ECF45B4F0856E1A3_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingTable_B1B7325F83BBE511ECF45B4F0856E1A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing [Table]</link:label>
    <link:label id="lab_us-gaap_SubordinatedBorrowingTable_B1B7325F83BBE511ECF45B4F0856E1A3_label_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingTable_B1B7325F83BBE511ECF45B4F0856E1A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubordinatedBorrowingTable" xlink:label="loc_us-gaap_SubordinatedBorrowingTable_B1B7325F83BBE511ECF45B4F0856E1A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedBorrowingTable_B1B7325F83BBE511ECF45B4F0856E1A3" xlink:to="lab_us-gaap_SubordinatedBorrowingTable_B1B7325F83BBE511ECF45B4F0856E1A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubordinatedBorrowingAxis_642B553FDAD60D0132A95B4F0856E905_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingAxis_642B553FDAD60D0132A95B4F0856E905" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing [Axis]</link:label>
    <link:label id="lab_us-gaap_SubordinatedBorrowingAxis_642B553FDAD60D0132A95B4F0856E905_label_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingAxis_642B553FDAD60D0132A95B4F0856E905" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubordinatedBorrowingAxis" xlink:label="loc_us-gaap_SubordinatedBorrowingAxis_642B553FDAD60D0132A95B4F0856E905" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedBorrowingAxis_642B553FDAD60D0132A95B4F0856E905" xlink:to="lab_us-gaap_SubordinatedBorrowingAxis_642B553FDAD60D0132A95B4F0856E905" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubordinatedBorrowingNameDomain_8E093741CC094D9777A05B4F0856393A_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingNameDomain_8E093741CC094D9777A05B4F0856393A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing, Name [Domain]</link:label>
    <link:label id="lab_us-gaap_SubordinatedBorrowingNameDomain_8E093741CC094D9777A05B4F0856393A_label_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingNameDomain_8E093741CC094D9777A05B4F0856393A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing, Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubordinatedBorrowingNameDomain" xlink:label="loc_us-gaap_SubordinatedBorrowingNameDomain_8E093741CC094D9777A05B4F0856393A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedBorrowingNameDomain_8E093741CC094D9777A05B4F0856393A" xlink:to="lab_us-gaap_SubordinatedBorrowingNameDomain_8E093741CC094D9777A05B4F0856393A" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionAxis_5EE0BB31AAF96BBD36385B4F0856DD83_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAxis_5EE0BB31AAF96BBD36385B4F0856DD83" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition [Axis]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionAxis_5EE0BB31AAF96BBD36385B4F0856DD83_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAxis_5EE0BB31AAF96BBD36385B4F0856DD83" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_5EE0BB31AAF96BBD36385B4F0856DD83" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_5EE0BB31AAF96BBD36385B4F0856DD83" xlink:to="lab_us-gaap_BusinessAcquisitionAxis_5EE0BB31AAF96BBD36385B4F0856DD83" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionAcquireeDomain_6510E6F0746414FB26555B4F08564924_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAcquireeDomain_6510E6F0746414FB26555B4F08564924" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Acquiree [Domain]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionAcquireeDomain_6510E6F0746414FB26555B4F08564924_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAcquireeDomain_6510E6F0746414FB26555B4F08564924" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Acquiree [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6510E6F0746414FB26555B4F08564924" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6510E6F0746414FB26555B4F08564924" xlink:to="lab_us-gaap_BusinessAcquisitionAcquireeDomain_6510E6F0746414FB26555B4F08564924" xlink:type="arc" />
    <link:label id="lab_colb_PacificContinentalMember_7A23E729EBDA3555656F5B4F08561CC7_terseLabel_en-US" xlink:label="lab_colb_PacificContinentalMember_7A23E729EBDA3555656F5B4F08561CC7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pacific Continental [Member]</link:label>
    <link:label id="lab_colb_PacificContinentalMember_7A23E729EBDA3555656F5B4F08561CC7_label_en-US" xlink:label="lab_colb_PacificContinentalMember_7A23E729EBDA3555656F5B4F08561CC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pacific Continental [Member]</link:label>
    <link:label id="lab_colb_PacificContinentalMember_7A23E729EBDA3555656F5B4F08561CC7_documentation_en-US" xlink:label="lab_colb_PacificContinentalMember_7A23E729EBDA3555656F5B4F08561CC7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Pacific Continental [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_PacificContinentalMember" xlink:label="loc_colb_PacificContinentalMember_7A23E729EBDA3555656F5B4F08561CC7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_PacificContinentalMember_7A23E729EBDA3555656F5B4F08561CC7" xlink:to="lab_colb_PacificContinentalMember_7A23E729EBDA3555656F5B4F08561CC7" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubordinatedBorrowingLineItems_33A78C05E9472848CA545B4F0856C057_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingLineItems_33A78C05E9472848CA545B4F0856C057" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing [Line Items]</link:label>
    <link:label id="lab_us-gaap_SubordinatedBorrowingLineItems_33A78C05E9472848CA545B4F0856C057_label_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingLineItems_33A78C05E9472848CA545B4F0856C057" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubordinatedBorrowingLineItems" xlink:label="loc_us-gaap_SubordinatedBorrowingLineItems_33A78C05E9472848CA545B4F0856C057" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedBorrowingLineItems_33A78C05E9472848CA545B4F0856C057" xlink:to="lab_us-gaap_SubordinatedBorrowingLineItems_33A78C05E9472848CA545B4F0856C057" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_AF379C34DA049597597E5B4F08569AC8_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_AF379C34DA049597597E5B4F08569AC8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Subordinated Debt</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_AF379C34DA049597597E5B4F08569AC8_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_AF379C34DA049597597E5B4F08569AC8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_AF379C34DA049597597E5B4F08569AC8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount_AF379C34DA049597597E5B4F08569AC8" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount_AF379C34DA049597597E5B4F08569AC8" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubordinatedBorrowingInterestRate_EB1F299A2EE81FB8BA815B4F0856FC37_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingInterestRate_EB1F299A2EE81FB8BA815B4F0856FC37" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing, Interest Rate</link:label>
    <link:label id="lab_us-gaap_SubordinatedBorrowingInterestRate_EB1F299A2EE81FB8BA815B4F0856FC37_label_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingInterestRate_EB1F299A2EE81FB8BA815B4F0856FC37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing, Interest Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubordinatedBorrowingInterestRate" xlink:label="loc_us-gaap_SubordinatedBorrowingInterestRate_EB1F299A2EE81FB8BA815B4F0856FC37" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedBorrowingInterestRate_EB1F299A2EE81FB8BA815B4F0856FC37" xlink:to="lab_us-gaap_SubordinatedBorrowingInterestRate_EB1F299A2EE81FB8BA815B4F0856FC37" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateTerms_3EED5DA6725A19B00A755B4F0856FE82_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateTerms_3EED5DA6725A19B00A755B4F0856FE82" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate Terms</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateTerms_3EED5DA6725A19B00A755B4F0856FE82_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateTerms_3EED5DA6725A19B00A755B4F0856FE82" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate Terms</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateTerms" xlink:label="loc_us-gaap_DebtInstrumentInterestRateTerms_3EED5DA6725A19B00A755B4F0856FE82" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateTerms_3EED5DA6725A19B00A755B4F0856FE82" xlink:to="lab_us-gaap_DebtInstrumentInterestRateTerms_3EED5DA6725A19B00A755B4F0856FE82" xlink:type="arc" />
    <link:label id="lab_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_2C2A206506DD16A3D4EB5B4F09AEC14E_label_en-US" xlink:label="lab_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_2C2A206506DD16A3D4EB5B4F09AEC14E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Quarterly Financial Information Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_2C2A206506DD16A3D4EB5B4F09AEC14E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_2C2A206506DD16A3D4EB5B4F09AEC14E" xlink:to="lab_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_2C2A206506DD16A3D4EB5B4F09AEC14E" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndDividendIncomeOperating_976E057749C12A7F1BA45B4F09AE5897_terseLabel_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeOperating_976E057749C12A7F1BA45B4F09AE5897" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total interest income</link:label>
    <link:label id="lab_us-gaap_InterestAndDividendIncomeOperating_976E057749C12A7F1BA45B4F09AE5897_label_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeOperating_976E057749C12A7F1BA45B4F09AE5897" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Dividend Income, Operating</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndDividendIncomeOperating" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_976E057749C12A7F1BA45B4F09AE5897" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_976E057749C12A7F1BA45B4F09AE5897" xlink:to="lab_us-gaap_InterestAndDividendIncomeOperating_976E057749C12A7F1BA45B4F09AE5897" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpense_F4A6C78F28F09147509C5B4F09AED7AD_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpense_F4A6C78F28F09147509C5B4F09AED7AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total interest expense</link:label>
    <link:label id="lab_us-gaap_InterestExpense_F4A6C78F28F09147509C5B4F09AED7AD_label_en-US" xlink:label="lab_us-gaap_InterestExpense_F4A6C78F28F09147509C5B4F09AED7AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_F4A6C78F28F09147509C5B4F09AED7AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpense_F4A6C78F28F09147509C5B4F09AED7AD" xlink:to="lab_us-gaap_InterestExpense_F4A6C78F28F09147509C5B4F09AED7AD" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeExpenseNet_924544B337B1093699EA5B4F09AE6B80_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNet_924544B337B1093699EA5B4F09AE6B80" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net Interest Income</link:label>
    <link:label id="lab_us-gaap_InterestIncomeExpenseNet_924544B337B1093699EA5B4F09AE6B80_label_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNet_924544B337B1093699EA5B4F09AE6B80" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income (Expense), Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_924544B337B1093699EA5B4F09AE6B80" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_924544B337B1093699EA5B4F09AE6B80" xlink:to="lab_us-gaap_InterestIncomeExpenseNet_924544B337B1093699EA5B4F09AE6B80" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProvisionForLoanAndLeaseLosses_45CEC302AA33C83F3F615B4F09AE6B8E_terseLabel_en-US" xlink:label="lab_us-gaap_ProvisionForLoanAndLeaseLosses_45CEC302AA33C83F3F615B4F09AE6B8E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provision for loan and lease losses</link:label>
    <link:label id="lab_us-gaap_ProvisionForLoanAndLeaseLosses_45CEC302AA33C83F3F615B4F09AE6B8E_label_en-US" xlink:label="lab_us-gaap_ProvisionForLoanAndLeaseLosses_45CEC302AA33C83F3F615B4F09AE6B8E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Provision for Loan and Lease Losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProvisionForLoanAndLeaseLosses" xlink:label="loc_us-gaap_ProvisionForLoanAndLeaseLosses_45CEC302AA33C83F3F615B4F09AE6B8E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProvisionForLoanAndLeaseLosses_45CEC302AA33C83F3F615B4F09AE6B8E" xlink:to="lab_us-gaap_ProvisionForLoanAndLeaseLosses_45CEC302AA33C83F3F615B4F09AE6B8E" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestIncome_B6FD308867D102C7C64A5B4F09AE1B19_terseLabel_en-US" xlink:label="lab_us-gaap_NoninterestIncome_B6FD308867D102C7C64A5B4F09AE1B19" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noninterest income</link:label>
    <link:label id="lab_us-gaap_NoninterestIncome_B6FD308867D102C7C64A5B4F09AE1B19_label_en-US" xlink:label="lab_us-gaap_NoninterestIncome_B6FD308867D102C7C64A5B4F09AE1B19" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noninterest Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestIncome" xlink:label="loc_us-gaap_NoninterestIncome_B6FD308867D102C7C64A5B4F09AE1B19" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestIncome_B6FD308867D102C7C64A5B4F09AE1B19" xlink:to="lab_us-gaap_NoninterestIncome_B6FD308867D102C7C64A5B4F09AE1B19" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestExpense_206670AE044F168E2DAB5B4F09AE4E0C_terseLabel_en-US" xlink:label="lab_us-gaap_NoninterestExpense_206670AE044F168E2DAB5B4F09AE4E0C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noninterest expense</link:label>
    <link:label id="lab_us-gaap_NoninterestExpense_206670AE044F168E2DAB5B4F09AE4E0C_label_en-US" xlink:label="lab_us-gaap_NoninterestExpense_206670AE044F168E2DAB5B4F09AE4E0C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noninterest Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestExpense" xlink:label="loc_us-gaap_NoninterestExpense_206670AE044F168E2DAB5B4F09AE4E0C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestExpense_206670AE044F168E2DAB5B4F09AE4E0C" xlink:to="lab_us-gaap_NoninterestExpense_206670AE044F168E2DAB5B4F09AE4E0C" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5C35151C3EDF0B9539D95B4F09AE6E04_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5C35151C3EDF0B9539D95B4F09AE6E04" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income before income taxes</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5C35151C3EDF0B9539D95B4F09AE6E04_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5C35151C3EDF0B9539D95B4F09AE6E04" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5C35151C3EDF0B9539D95B4F09AE6E04" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5C35151C3EDF0B9539D95B4F09AE6E04" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_5C35151C3EDF0B9539D95B4F09AE6E04" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_8495BF35235EF93AF74E5B4F09AE266D_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_8495BF35235EF93AF74E5B4F09AE266D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Provision for income taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_8495BF35235EF93AF74E5B4F09AE266D_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_8495BF35235EF93AF74E5B4F09AE266D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8495BF35235EF93AF74E5B4F09AE266D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_8495BF35235EF93AF74E5B4F09AE266D" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_8495BF35235EF93AF74E5B4F09AE266D" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLoss_80DA596D15047DDE7D665B4F09AE6229_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_80DA596D15047DDE7D665B4F09AE6229" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_80DA596D15047DDE7D665B4F09AE6229_label_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_80DA596D15047DDE7D665B4F09AE6229" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_80DA596D15047DDE7D665B4F09AE6229" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_80DA596D15047DDE7D665B4F09AE6229" xlink:to="lab_us-gaap_NetIncomeLoss_80DA596D15047DDE7D665B4F09AE6229" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_453FAC184B474E1872FA5B4F09AEE3D2_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract_453FAC184B474E1872FA5B4F09AEE3D2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Per Common Share</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_453FAC184B474E1872FA5B4F09AEE3D2_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract_453FAC184B474E1872FA5B4F09AEE3D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_453FAC184B474E1872FA5B4F09AEE3D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareAbstract_453FAC184B474E1872FA5B4F09AEE3D2" xlink:to="lab_us-gaap_EarningsPerShareAbstract_453FAC184B474E1872FA5B4F09AEE3D2" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareBasic_914C4B7FD43503D575CA5B4F09AE133A_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic_914C4B7FD43503D575CA5B4F09AE133A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Earnings (basic)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_914C4B7FD43503D575CA5B4F09AE133A_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic_914C4B7FD43503D575CA5B4F09AE133A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_914C4B7FD43503D575CA5B4F09AE133A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasic_914C4B7FD43503D575CA5B4F09AE133A" xlink:to="lab_us-gaap_EarningsPerShareBasic_914C4B7FD43503D575CA5B4F09AE133A" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_237530CA964786723D965B4F09AEADC3_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted_237530CA964786723D965B4F09AEADC3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Earnings (diluted)</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_237530CA964786723D965B4F09AEADC3_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted_237530CA964786723D965B4F09AEADC3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Diluted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_237530CA964786723D965B4F09AEADC3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareDiluted_237530CA964786723D965B4F09AEADC3" xlink:to="lab_us-gaap_EarningsPerShareDiluted_237530CA964786723D965B4F09AEADC3" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_3C7981DEAA3A62E792F15B4F0A690B08_label_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_3C7981DEAA3A62E792F15B4F0A690B08" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of Compensation Related Costs, Share-based Payments [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_3C7981DEAA3A62E792F15B4F0A690B08" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_3C7981DEAA3A62E792F15B4F0A690B08" xlink:to="lab_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_3C7981DEAA3A62E792F15B4F0A690B08" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_6C28F6AFE558EC7E8FED5B4F0A69F568_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_6C28F6AFE558EC7E8FED5B4F0A69F568" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Nonvested Share Activity</link:label>
    <link:label id="lab_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_6C28F6AFE558EC7E8FED5B4F0A69F568_label_en-US" xlink:label="lab_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_6C28F6AFE558EC7E8FED5B4F0A69F568" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Nonvested Share Activity [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_6C28F6AFE558EC7E8FED5B4F0A69F568" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_6C28F6AFE558EC7E8FED5B4F0A69F568" xlink:to="lab_us-gaap_ScheduleOfNonvestedShareActivityTableTextBlock_6C28F6AFE558EC7E8FED5B4F0A69F568" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_D6194A78CC2C820326D95B4F0A69AB78_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_D6194A78CC2C820326D95B4F0A69AB78" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation, Stock Options, Activity</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_D6194A78CC2C820326D95B4F0A69AB78_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_D6194A78CC2C820326D95B4F0A69AB78" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Stock Options, Activity [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_D6194A78CC2C820326D95B4F0A69AB78" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_D6194A78CC2C820326D95B4F0A69AB78" xlink:to="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_D6194A78CC2C820326D95B4F0A69AB78" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_98381CAF5CAFD67DAE425B4F0A69845D_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_98381CAF5CAFD67DAE425B4F0A69845D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_98381CAF5CAFD67DAE425B4F0A69845D_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_98381CAF5CAFD67DAE425B4F0A69845D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_98381CAF5CAFD67DAE425B4F0A69845D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_98381CAF5CAFD67DAE425B4F0A69845D" xlink:to="lab_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_98381CAF5CAFD67DAE425B4F0A69845D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAbstract_74CBB0D589F5E8A77932C95C43AE82C5_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAbstract_74CBB0D589F5E8A77932C95C43AE82C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAbstract_74CBB0D589F5E8A77932C95C43AE82C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_74CBB0D589F5E8A77932C95C43AE82C5" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesAbstract_74CBB0D589F5E8A77932C95C43AE82C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_25F031DC8199FB081F7CC95C43AE8010_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_25F031DC8199FB081F7CC95C43AE8010" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Available-for-sale Securities [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_25F031DC8199FB081F7CC95C43AE8010_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_25F031DC8199FB081F7CC95C43AE8010" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Available-for-sale Securities [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesTable" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_25F031DC8199FB081F7CC95C43AE8010" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_25F031DC8199FB081F7CC95C43AE8010" xlink:to="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_25F031DC8199FB081F7CC95C43AE8010" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancialInstrumentAxis_90594A39AF3EB39E3746C95C43AF74C3_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis_90594A39AF3EB39E3746C95C43AF74C3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancialInstrumentAxis_90594A39AF3EB39E3746C95C43AF74C3_label_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis_90594A39AF3EB39E3746C95C43AF74C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Instrument [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis_90594A39AF3EB39E3746C95C43AF74C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentAxis_90594A39AF3EB39E3746C95C43AF74C3" xlink:to="lab_us-gaap_FinancialInstrumentAxis_90594A39AF3EB39E3746C95C43AF74C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_B36F4A37AF6A1F878683C95C43AF2CEB_verboseLabel_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_B36F4A37AF6A1F878683C95C43AF2CEB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Financial Instruments [Domain]</link:label>
    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_B36F4A37AF6A1F878683C95C43AF2CEB_label_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_B36F4A37AF6A1F878683C95C43AF2CEB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Instruments [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_B36F4A37AF6A1F878683C95C43AF2CEB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_B36F4A37AF6A1F878683C95C43AF2CEB" xlink:to="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_B36F4A37AF6A1F878683C95C43AF2CEB" xlink:type="arc" />
    <link:label id="lab_srt_RangeAxis_CA2C488FDD19B293A939C95C43AF01E4_terseLabel_en-US" xlink:label="lab_srt_RangeAxis_CA2C488FDD19B293A939C95C43AF01E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Range [Axis]</link:label>
    <link:label id="lab_srt_RangeAxis_CA2C488FDD19B293A939C95C43AF01E4_label_en-US" xlink:label="lab_srt_RangeAxis_CA2C488FDD19B293A939C95C43AF01E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Range [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeAxis" xlink:label="loc_srt_RangeAxis_CA2C488FDD19B293A939C95C43AF01E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeAxis_CA2C488FDD19B293A939C95C43AF01E4" xlink:to="lab_srt_RangeAxis_CA2C488FDD19B293A939C95C43AF01E4" xlink:type="arc" />
    <link:label id="lab_srt_RangeMember_FCA646D22B3EB5878A77C95C43AFDF71_terseLabel_en-US" xlink:label="lab_srt_RangeMember_FCA646D22B3EB5878A77C95C43AFDF71" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Range [Domain]</link:label>
    <link:label id="lab_srt_RangeMember_FCA646D22B3EB5878A77C95C43AFDF71_label_en-US" xlink:label="lab_srt_RangeMember_FCA646D22B3EB5878A77C95C43AFDF71" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Range [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RangeMember" xlink:label="loc_srt_RangeMember_FCA646D22B3EB5878A77C95C43AFDF71" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeMember_FCA646D22B3EB5878A77C95C43AFDF71" xlink:to="lab_srt_RangeMember_FCA646D22B3EB5878A77C95C43AFDF71" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_07714CC2BE4423EA0E43C95C43B059F2_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_07714CC2BE4423EA0E43C95C43B059F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale [Line Items]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_07714CC2BE4423EA0E43C95C43B059F2_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_07714CC2BE4423EA0E43C95C43B059F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_07714CC2BE4423EA0E43C95C43B059F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_07714CC2BE4423EA0E43C95C43B059F2" xlink:to="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_07714CC2BE4423EA0E43C95C43B059F2" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesTextBlock_10ACBBE2EFFE1A5BA87BC95C43B00867_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesTextBlock_10ACBBE2EFFE1A5BA87BC95C43B00867" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securities Available for Sale</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesTextBlock_10ACBBE2EFFE1A5BA87BC95C43B00867_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesTextBlock_10ACBBE2EFFE1A5BA87BC95C43B00867" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesTextBlock" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesTextBlock_10ACBBE2EFFE1A5BA87BC95C43B00867" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesTextBlock_10ACBBE2EFFE1A5BA87BC95C43B00867" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesTextBlock_10ACBBE2EFFE1A5BA87BC95C43B00867" xlink:type="arc" />
    <link:label id="lab_colb_ScheduleofgrossrealizedgainsandlossesonsalesandcallsofsecuritiesavailableforsaleTableTextBlock_9D946D563757E65DC2D9C95C43B0829D_terseLabel_en-US" xlink:label="lab_colb_ScheduleofgrossrealizedgainsandlossesonsalesandcallsofsecuritiesavailableforsaleTableTextBlock_9D946D563757E65DC2D9C95C43B0829D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of gross realized gains and losses on sales and calls of securities available for sale [Table Text Block]</link:label>
    <link:label id="lab_colb_ScheduleofgrossrealizedgainsandlossesonsalesandcallsofsecuritiesavailableforsaleTableTextBlock_9D946D563757E65DC2D9C95C43B0829D_label_en-US" xlink:label="lab_colb_ScheduleofgrossrealizedgainsandlossesonsalesandcallsofsecuritiesavailableforsaleTableTextBlock_9D946D563757E65DC2D9C95C43B0829D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of gross realized gains and losses on sales and calls of securities available for sale [Table Text Block]</link:label>
    <link:label id="lab_colb_ScheduleofgrossrealizedgainsandlossesonsalesandcallsofsecuritiesavailableforsaleTableTextBlock_9D946D563757E65DC2D9C95C43B0829D_documentation_en-US" xlink:label="lab_colb_ScheduleofgrossrealizedgainsandlossesonsalesandcallsofsecuritiesavailableforsaleTableTextBlock_9D946D563757E65DC2D9C95C43B0829D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Table Text Block] for Schedule of gross realized gains and losses on sales and calls of securities available for sale [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ScheduleofgrossrealizedgainsandlossesonsalesandcallsofsecuritiesavailableforsaleTableTextBlock" xlink:label="loc_colb_ScheduleofgrossrealizedgainsandlossesonsalesandcallsofsecuritiesavailableforsaleTableTextBlock_9D946D563757E65DC2D9C95C43B0829D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ScheduleofgrossrealizedgainsandlossesonsalesandcallsofsecuritiesavailableforsaleTableTextBlock_9D946D563757E65DC2D9C95C43B0829D" xlink:to="lab_colb_ScheduleofgrossrealizedgainsandlossesonsalesandcallsofsecuritiesavailableforsaleTableTextBlock_9D946D563757E65DC2D9C95C43B0829D" xlink:type="arc" />
    <link:label id="lab_colb_UnrealizedgainsandlossesonequitysecuritiesTableTextBlock_E2B322AB7AF244CAB7ACC9692C7FD1C2_terseLabel_en-US" xlink:label="lab_colb_UnrealizedgainsandlossesonequitysecuritiesTableTextBlock_E2B322AB7AF244CAB7ACC9692C7FD1C2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss) on Investments [Table Text Block]</link:label>
    <link:label id="lab_colb_UnrealizedgainsandlossesonequitysecuritiesTableTextBlock_E2B322AB7AF244CAB7ACC9692C7FD1C2_label_en-US" xlink:label="lab_colb_UnrealizedgainsandlossesonequitysecuritiesTableTextBlock_E2B322AB7AF244CAB7ACC9692C7FD1C2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized gains and losses on equity securities [Table Text Block]</link:label>
    <link:label id="lab_colb_UnrealizedgainsandlossesonequitysecuritiesTableTextBlock_E2B322AB7AF244CAB7ACC9692C7FD1C2_documentation_en-US" xlink:label="lab_colb_UnrealizedgainsandlossesonequitysecuritiesTableTextBlock_E2B322AB7AF244CAB7ACC9692C7FD1C2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unrealized gains and losses on equity securities [Table Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_UnrealizedgainsandlossesonequitysecuritiesTableTextBlock" xlink:label="loc_colb_UnrealizedgainsandlossesonequitysecuritiesTableTextBlock_E2B322AB7AF244CAB7ACC9692C7FD1C2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_UnrealizedgainsandlossesonequitysecuritiesTableTextBlock_E2B322AB7AF244CAB7ACC9692C7FD1C2" xlink:to="lab_colb_UnrealizedgainsandlossesonequitysecuritiesTableTextBlock_E2B322AB7AF244CAB7ACC9692C7FD1C2" xlink:type="arc" />
    <link:label id="lab_colb_ScheduleOfContractualMaturitiesTextBlock_E87BB53DDB135AB19F4BC95C43B05778_verboseLabel_en-US" xlink:label="lab_colb_ScheduleOfContractualMaturitiesTextBlock_E87BB53DDB135AB19F4BC95C43B05778" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Contractual Maturities of Investment Securities Available for Sale</link:label>
    <link:label id="lab_colb_ScheduleOfContractualMaturitiesTextBlock_E87BB53DDB135AB19F4BC95C43B05778_label_en-US" xlink:label="lab_colb_ScheduleOfContractualMaturitiesTextBlock_E87BB53DDB135AB19F4BC95C43B05778" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Contractual Maturities [Text Block]</link:label>
    <link:label id="lab_colb_ScheduleOfContractualMaturitiesTextBlock_E87BB53DDB135AB19F4BC95C43B05778_documentation_en-US" xlink:label="lab_colb_ScheduleOfContractualMaturitiesTextBlock_E87BB53DDB135AB19F4BC95C43B05778" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of amortized cost and fair value of the debt securities available for sale portfolio of the entity by contractual maturity. The table includes maturity categories of: due in one year or less; due after one year through five years; due after five years through ten years; and due after ten years. A single line item is provided for "total securities with no stated maturity" in order for the total line item of the table to match total available for sale securities.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ScheduleOfContractualMaturitiesTextBlock" xlink:label="loc_colb_ScheduleOfContractualMaturitiesTextBlock_E87BB53DDB135AB19F4BC95C43B05778" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ScheduleOfContractualMaturitiesTextBlock_E87BB53DDB135AB19F4BC95C43B05778" xlink:to="lab_colb_ScheduleOfContractualMaturitiesTextBlock_E87BB53DDB135AB19F4BC95C43B05778" xlink:type="arc" />
    <link:label id="lab_colb_ScheduleofSecuritiespledgedascollateralTableTextBlock_168DEE98EC1D28987EB0C95C43B54CBA_terseLabel_en-US" xlink:label="lab_colb_ScheduleofSecuritiespledgedascollateralTableTextBlock_168DEE98EC1D28987EB0C95C43B54CBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Securities pledged as collateral [Table Text Block]</link:label>
    <link:label id="lab_colb_ScheduleofSecuritiespledgedascollateralTableTextBlock_168DEE98EC1D28987EB0C95C43B54CBA_label_en-US" xlink:label="lab_colb_ScheduleofSecuritiespledgedascollateralTableTextBlock_168DEE98EC1D28987EB0C95C43B54CBA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Securities pledged as collateral [Table Text Block]</link:label>
    <link:label id="lab_colb_ScheduleofSecuritiespledgedascollateralTableTextBlock_168DEE98EC1D28987EB0C95C43B54CBA_documentation_en-US" xlink:label="lab_colb_ScheduleofSecuritiespledgedascollateralTableTextBlock_168DEE98EC1D28987EB0C95C43B54CBA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Table Text Block] for Schedule of Securities pledged as collateral [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ScheduleofSecuritiespledgedascollateralTableTextBlock" xlink:label="loc_colb_ScheduleofSecuritiespledgedascollateralTableTextBlock_168DEE98EC1D28987EB0C95C43B54CBA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ScheduleofSecuritiespledgedascollateralTableTextBlock_168DEE98EC1D28987EB0C95C43B54CBA" xlink:to="lab_colb_ScheduleofSecuritiespledgedascollateralTableTextBlock_168DEE98EC1D28987EB0C95C43B54CBA" xlink:type="arc" />
    <link:label id="lab_colb_ScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesInContinuousUnrealizedLossPositionTextBlock_51FFEC81790D48452799C95C43B6750F_verboseLabel_en-US" xlink:label="lab_colb_ScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesInContinuousUnrealizedLossPositionTextBlock_51FFEC81790D48452799C95C43B6750F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses</link:label>
    <link:label id="lab_colb_ScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesInContinuousUnrealizedLossPositionTextBlock_51FFEC81790D48452799C95C43B6750F_label_en-US" xlink:label="lab_colb_ScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesInContinuousUnrealizedLossPositionTextBlock_51FFEC81790D48452799C95C43B6750F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Gross Unrealized Losses And Fair Values Of Securities In Continuous Unrealized Loss Position [Text Block]</link:label>
    <link:label id="lab_colb_ScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesInContinuousUnrealizedLossPositionTextBlock_51FFEC81790D48452799C95C43B6750F_documentation_en-US" xlink:label="lab_colb_ScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesInContinuousUnrealizedLossPositionTextBlock_51FFEC81790D48452799C95C43B6750F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule reflecting the gross unrealized losses and fair values of the entity's investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of the date presented.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesInContinuousUnrealizedLossPositionTextBlock" xlink:label="loc_colb_ScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesInContinuousUnrealizedLossPositionTextBlock_51FFEC81790D48452799C95C43B6750F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesInContinuousUnrealizedLossPositionTextBlock_51FFEC81790D48452799C95C43B6750F" xlink:to="lab_colb_ScheduleOfGrossUnrealizedLossesAndFairValuesOfSecuritiesInContinuousUnrealizedLossPositionTextBlock_51FFEC81790D48452799C95C43B6750F" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_05499F19C0FAE854ABA75B4F08371405_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_05499F19C0FAE854ABA75B4F08371405" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_05499F19C0FAE854ABA75B4F08371405" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_05499F19C0FAE854ABA75B4F08371405" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_05499F19C0FAE854ABA75B4F08371405" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_38062273FCBB723996225B4F0847A7E4_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_38062273FCBB723996225B4F0847A7E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Future Minimum Rental Payments for Operating Leases</link:label>
    <link:label id="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_38062273FCBB723996225B4F0847A7E4_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_38062273FCBB723996225B4F0847A7E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_38062273FCBB723996225B4F0847A7E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_38062273FCBB723996225B4F0847A7E4" xlink:to="lab_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_38062273FCBB723996225B4F0847A7E4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_89D44626FF08155D96FE5B4F0931C404_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_89D44626FF08155D96FE5B4F0931C404" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_89D44626FF08155D96FE5B4F0931C404_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_89D44626FF08155D96FE5B4F0931C404" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Financing Receivable, Recorded Investment, Credit Quality Indicator [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_89D44626FF08155D96FE5B4F0931C404" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_89D44626FF08155D96FE5B4F0931C404" xlink:to="lab_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_89D44626FF08155D96FE5B4F0931C404" xlink:type="arc" />
    <link:label id="lab_colb_LoansByMajorCategoryAxis_8C5E008CD89A03116A265B4F0931D073_terseLabel_en-US" xlink:label="lab_colb_LoansByMajorCategoryAxis_8C5E008CD89A03116A265B4F0931D073" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans By Major Category [Axis]</link:label>
    <link:label id="lab_colb_LoansByMajorCategoryAxis_8C5E008CD89A03116A265B4F0931D073_label_en-US" xlink:label="lab_colb_LoansByMajorCategoryAxis_8C5E008CD89A03116A265B4F0931D073" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans By Major Category [Axis]</link:label>
    <link:label id="lab_colb_LoansByMajorCategoryAxis_8C5E008CD89A03116A265B4F0931D073_documentation_en-US" xlink:label="lab_colb_LoansByMajorCategoryAxis_8C5E008CD89A03116A265B4F0931D073" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans By Major Category [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoansByMajorCategoryAxis" xlink:label="loc_colb_LoansByMajorCategoryAxis_8C5E008CD89A03116A265B4F0931D073" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoansByMajorCategoryAxis_8C5E008CD89A03116A265B4F0931D073" xlink:to="lab_colb_LoansByMajorCategoryAxis_8C5E008CD89A03116A265B4F0931D073" xlink:type="arc" />
    <link:label id="lab_colb_LoansByMajorCategoryDomain_921F853D59817F3BA0F45B4F0931B53F_terseLabel_en-US" xlink:label="lab_colb_LoansByMajorCategoryDomain_921F853D59817F3BA0F45B4F0931B53F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans By Major Category [Domain]</link:label>
    <link:label id="lab_colb_LoansByMajorCategoryDomain_921F853D59817F3BA0F45B4F0931B53F_label_en-US" xlink:label="lab_colb_LoansByMajorCategoryDomain_921F853D59817F3BA0F45B4F0931B53F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans By Major Category [Domain]</link:label>
    <link:label id="lab_colb_LoansByMajorCategoryDomain_921F853D59817F3BA0F45B4F0931B53F_documentation_en-US" xlink:label="lab_colb_LoansByMajorCategoryDomain_921F853D59817F3BA0F45B4F0931B53F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans By Major Category [Domain]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoansByMajorCategoryDomain" xlink:label="loc_colb_LoansByMajorCategoryDomain_921F853D59817F3BA0F45B4F0931B53F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoansByMajorCategoryDomain_921F853D59817F3BA0F45B4F0931B53F" xlink:to="lab_colb_LoansByMajorCategoryDomain_921F853D59817F3BA0F45B4F0931B53F" xlink:type="arc" />
    <link:label id="lab_colb_LoansExcludingPurchasedCreditImpairedLoansMember_1BF327BADBE6CB7F81A95B4F09319EBB_terseLabel_en-US" xlink:label="lab_colb_LoansExcludingPurchasedCreditImpairedLoansMember_1BF327BADBE6CB7F81A95B4F09319EBB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans, Excluding Purchased Credit Impaired Loans [Member]</link:label>
    <link:label id="lab_colb_LoansExcludingPurchasedCreditImpairedLoansMember_1BF327BADBE6CB7F81A95B4F09319EBB_label_en-US" xlink:label="lab_colb_LoansExcludingPurchasedCreditImpairedLoansMember_1BF327BADBE6CB7F81A95B4F09319EBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans, Excluding Purchased Credit Impaired Loans [Member]</link:label>
    <link:label id="lab_colb_LoansExcludingPurchasedCreditImpairedLoansMember_1BF327BADBE6CB7F81A95B4F09319EBB_documentation_en-US" xlink:label="lab_colb_LoansExcludingPurchasedCreditImpairedLoansMember_1BF327BADBE6CB7F81A95B4F09319EBB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans, Excluding Purchased Credit Impaired Loans [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoansExcludingPurchasedCreditImpairedLoansMember" xlink:label="loc_colb_LoansExcludingPurchasedCreditImpairedLoansMember_1BF327BADBE6CB7F81A95B4F09319EBB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoansExcludingPurchasedCreditImpairedLoansMember_1BF327BADBE6CB7F81A95B4F09319EBB" xlink:to="lab_colb_LoansExcludingPurchasedCreditImpairedLoansMember_1BF327BADBE6CB7F81A95B4F09319EBB" xlink:type="arc" />
    <link:label id="lab_colb_PurchasedCreditImpairedLoansMember_5B017096DF3990C29ABB5B4F0931F20B_terseLabel_en-US" xlink:label="lab_colb_PurchasedCreditImpairedLoansMember_5B017096DF3990C29ABB5B4F0931F20B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchased Credit Impaired Loans [Member]</link:label>
    <link:label id="lab_colb_PurchasedCreditImpairedLoansMember_5B017096DF3990C29ABB5B4F0931F20B_label_en-US" xlink:label="lab_colb_PurchasedCreditImpairedLoansMember_5B017096DF3990C29ABB5B4F0931F20B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Purchased Credit Impaired Loans [Member]</link:label>
    <link:label id="lab_colb_PurchasedCreditImpairedLoansMember_5B017096DF3990C29ABB5B4F0931F20B_documentation_en-US" xlink:label="lab_colb_PurchasedCreditImpairedLoansMember_5B017096DF3990C29ABB5B4F0931F20B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Purchased Credit Impaired Loans [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_PurchasedCreditImpairedLoansMember" xlink:label="loc_colb_PurchasedCreditImpairedLoansMember_5B017096DF3990C29ABB5B4F0931F20B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_PurchasedCreditImpairedLoansMember_5B017096DF3990C29ABB5B4F0931F20B" xlink:to="lab_colb_PurchasedCreditImpairedLoansMember_5B017096DF3990C29ABB5B4F0931F20B" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentLineItems_55175012A208D5EBF2525B4F0931FE3B_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentLineItems_55175012A208D5EBF2525B4F0931FE3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment [Line Items]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentLineItems_55175012A208D5EBF2525B4F0931FE3B_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentLineItems_55175012A208D5EBF2525B4F0931FE3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_55175012A208D5EBF2525B4F0931FE3B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_55175012A208D5EBF2525B4F0931FE3B" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentLineItems_55175012A208D5EBF2525B4F0931FE3B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_370038178B80D06568E05B4F09313419_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_370038178B80D06568E05B4F09313419" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Analysis of Loan Portfolio by Major Types of Loans</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_370038178B80D06568E05B4F09313419_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_370038178B80D06568E05B4F09313419" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_370038178B80D06568E05B4F09313419" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_370038178B80D06568E05B4F09313419" xlink:to="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_370038178B80D06568E05B4F09313419" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_5279E881B09823BD38A15B4F093126CA_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_5279E881B09823BD38A15B4F093126CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Analysis of Nonaccrual Loans</link:label>
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_5279E881B09823BD38A15B4F093126CA_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_5279E881B09823BD38A15B4F093126CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Financing Receivables, Non Accrual Status [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_5279E881B09823BD38A15B4F093126CA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_5279E881B09823BD38A15B4F093126CA" xlink:to="lab_us-gaap_ScheduleOfFinancingReceivablesNonAccrualStatusTableTextBlock_5279E881B09823BD38A15B4F093126CA" xlink:type="arc" />
    <link:label id="lab_us-gaap_PastDueFinancingReceivablesTableTextBlock_DF69228091A04EF0228F5B4F0931792F_terseLabel_en-US" xlink:label="lab_us-gaap_PastDueFinancingReceivablesTableTextBlock_DF69228091A04EF0228F5B4F0931792F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Analysis of the Aged Loan Portfolio</link:label>
    <link:label id="lab_us-gaap_PastDueFinancingReceivablesTableTextBlock_DF69228091A04EF0228F5B4F0931792F_label_en-US" xlink:label="lab_us-gaap_PastDueFinancingReceivablesTableTextBlock_DF69228091A04EF0228F5B4F0931792F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Past Due Financing Receivables [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PastDueFinancingReceivablesTableTextBlock" xlink:label="loc_us-gaap_PastDueFinancingReceivablesTableTextBlock_DF69228091A04EF0228F5B4F0931792F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PastDueFinancingReceivablesTableTextBlock_DF69228091A04EF0228F5B4F0931792F" xlink:to="lab_us-gaap_PastDueFinancingReceivablesTableTextBlock_DF69228091A04EF0228F5B4F0931792F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivablesTableTextBlock_D0769EE849AE036554675B4F0931456A_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivablesTableTextBlock_D0769EE849AE036554675B4F0931456A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivables</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivablesTableTextBlock_D0769EE849AE036554675B4F0931456A_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivablesTableTextBlock_D0769EE849AE036554675B4F0931456A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivables [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairedFinancingReceivablesTableTextBlock" xlink:label="loc_us-gaap_ImpairedFinancingReceivablesTableTextBlock_D0769EE849AE036554675B4F0931456A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivablesTableTextBlock_D0769EE849AE036554675B4F0931456A" xlink:to="lab_us-gaap_ImpairedFinancingReceivablesTableTextBlock_D0769EE849AE036554675B4F0931456A" xlink:type="arc" />
    <link:label id="lab_us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_DE32B3690590CF64339D5B4F0931D091_terseLabel_en-US" xlink:label="lab_us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_DE32B3690590CF64339D5B4F0931D091" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Analysis of loans classified as Troubled Debt Restructurings (&#8220;TDR&#8221;)</link:label>
    <link:label id="lab_us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_DE32B3690590CF64339D5B4F0931D091_label_en-US" xlink:label="lab_us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_DE32B3690590CF64339D5B4F0931D091" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Troubled Debt Restructurings on Financing Receivables [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock" xlink:label="loc_us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_DE32B3690590CF64339D5B4F0931D091" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_DE32B3690590CF64339D5B4F0931D091" xlink:to="lab_us-gaap_TroubledDebtRestructuringsOnFinancingReceivablesTableTextBlock_DE32B3690590CF64339D5B4F0931D091" xlink:type="arc" />
    <link:label id="lab_colb_ChangesInAccretableYieldForAcquiredLoansTableTextBlock_645DA3B318A41087BF155B4F093129CE_terseLabel_en-US" xlink:label="lab_colb_ChangesInAccretableYieldForAcquiredLoansTableTextBlock_645DA3B318A41087BF155B4F093129CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in Accretable Yield for Acquired Loans [Table Text Block]</link:label>
    <link:label id="lab_colb_ChangesInAccretableYieldForAcquiredLoansTableTextBlock_645DA3B318A41087BF155B4F093129CE_label_en-US" xlink:label="lab_colb_ChangesInAccretableYieldForAcquiredLoansTableTextBlock_645DA3B318A41087BF155B4F093129CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Changes in Accretable Yield for Acquired Loans [Table Text Block]</link:label>
    <link:label id="lab_colb_ChangesInAccretableYieldForAcquiredLoansTableTextBlock_645DA3B318A41087BF155B4F093129CE_documentation_en-US" xlink:label="lab_colb_ChangesInAccretableYieldForAcquiredLoansTableTextBlock_645DA3B318A41087BF155B4F093129CE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Changes in Accretable Yield for Acquired Loans [Table Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ChangesInAccretableYieldForAcquiredLoansTableTextBlock" xlink:label="loc_colb_ChangesInAccretableYieldForAcquiredLoansTableTextBlock_645DA3B318A41087BF155B4F093129CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ChangesInAccretableYieldForAcquiredLoansTableTextBlock_645DA3B318A41087BF155B4F093129CE" xlink:to="lab_colb_ChangesInAccretableYieldForAcquiredLoansTableTextBlock_645DA3B318A41087BF155B4F093129CE" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentAbstract_3E72B5F569E0EAB21B745B4F09315A06_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentAbstract_3E72B5F569E0EAB21B745B4F09315A06" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_3E72B5F569E0EAB21B745B4F09315A06" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_3E72B5F569E0EAB21B745B4F09315A06" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentAbstract_3E72B5F569E0EAB21B745B4F09315A06" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_60CC0553691D2F7FD5DE5B4F093118D9_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_60CC0553691D2F7FD5DE5B4F093118D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Property, Plant and Equipment [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_60CC0553691D2F7FD5DE5B4F093118D9_label_en-US" xlink:label="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_60CC0553691D2F7FD5DE5B4F093118D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_60CC0553691D2F7FD5DE5B4F093118D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_60CC0553691D2F7FD5DE5B4F093118D9" xlink:to="lab_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_60CC0553691D2F7FD5DE5B4F093118D9" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_71E383F5AD9FD63E2EB35B4F09310DA3_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_71E383F5AD9FD63E2EB35B4F09310DA3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment by Type [Axis]</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_71E383F5AD9FD63E2EB35B4F09310DA3_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_71E383F5AD9FD63E2EB35B4F09310DA3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_71E383F5AD9FD63E2EB35B4F09310DA3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_71E383F5AD9FD63E2EB35B4F09310DA3" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentByTypeAxis_71E383F5AD9FD63E2EB35B4F09310DA3" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_7B6DB8336B5AC68341465B4F093115C5_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_7B6DB8336B5AC68341465B4F093115C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_7B6DB8336B5AC68341465B4F093115C5_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_7B6DB8336B5AC68341465B4F093115C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_7B6DB8336B5AC68341465B4F093115C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_7B6DB8336B5AC68341465B4F093115C5" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentTypeDomain_7B6DB8336B5AC68341465B4F093115C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_LandMember_D444BABAB36E1538C04E5B4F09319041_label_en-US" xlink:label="lab_us-gaap_LandMember_D444BABAB36E1538C04E5B4F09319041" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Land [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LandMember" xlink:label="loc_us-gaap_LandMember_D444BABAB36E1538C04E5B4F09319041" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LandMember_D444BABAB36E1538C04E5B4F09319041" xlink:to="lab_us-gaap_LandMember_D444BABAB36E1538C04E5B4F09319041" xlink:type="arc" />
    <link:label id="lab_us-gaap_BuildingMember_B04D1F33157E590651DD5B4F093105BA_label_en-US" xlink:label="lab_us-gaap_BuildingMember_B04D1F33157E590651DD5B4F093105BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Building [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_B04D1F33157E590651DD5B4F093105BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BuildingMember_B04D1F33157E590651DD5B4F093105BA" xlink:to="lab_us-gaap_BuildingMember_B04D1F33157E590651DD5B4F093105BA" xlink:type="arc" />
    <link:label id="lab_us-gaap_LeaseholdImprovementsMember_AD51B56AB2F1351C84535B4F09313704_label_en-US" xlink:label="lab_us-gaap_LeaseholdImprovementsMember_AD51B56AB2F1351C84535B4F09313704" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Leasehold Improvements [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_AD51B56AB2F1351C84535B4F09313704" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseholdImprovementsMember_AD51B56AB2F1351C84535B4F09313704" xlink:to="lab_us-gaap_LeaseholdImprovementsMember_AD51B56AB2F1351C84535B4F09313704" xlink:type="arc" />
    <link:label id="lab_us-gaap_FurnitureAndFixturesMember_9C9F9A01C9CECF54916F5B4F0931A486_label_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_9C9F9A01C9CECF54916F5B4F0931A486" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Furniture and Fixtures [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_9C9F9A01C9CECF54916F5B4F0931A486" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FurnitureAndFixturesMember_9C9F9A01C9CECF54916F5B4F0931A486" xlink:to="lab_us-gaap_FurnitureAndFixturesMember_9C9F9A01C9CECF54916F5B4F0931A486" xlink:type="arc" />
    <link:label id="lab_us-gaap_VehiclesMember_F7CCDC81C15808ABBB585B4F09312190_label_en-US" xlink:label="lab_us-gaap_VehiclesMember_F7CCDC81C15808ABBB585B4F09312190" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vehicles [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VehiclesMember" xlink:label="loc_us-gaap_VehiclesMember_F7CCDC81C15808ABBB585B4F09312190" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VehiclesMember_F7CCDC81C15808ABBB585B4F09312190" xlink:to="lab_us-gaap_VehiclesMember_F7CCDC81C15808ABBB585B4F09312190" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_864178D4EF1106E2AD355B4F093151B8_terseLabel_en-US" xlink:label="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_864178D4EF1106E2AD355B4F093151B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Software [Member]</link:label>
    <link:label id="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_864178D4EF1106E2AD355B4F093151B8_label_en-US" xlink:label="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_864178D4EF1106E2AD355B4F093151B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Computer Software, Intangible Asset [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_864178D4EF1106E2AD355B4F093151B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_864178D4EF1106E2AD355B4F093151B8" xlink:to="lab_us-gaap_ComputerSoftwareIntangibleAssetMember_864178D4EF1106E2AD355B4F093151B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_A67EE819F7DE56C950955B4F09312D4C_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_A67EE819F7DE56C950955B4F09312D4C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment [Line Items]</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_A67EE819F7DE56C950955B4F09312D4C_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_A67EE819F7DE56C950955B4F09312D4C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_A67EE819F7DE56C950955B4F09312D4C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_A67EE819F7DE56C950955B4F09312D4C" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentLineItems_A67EE819F7DE56C950955B4F09312D4C" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_EA6B477BC7D766C58A055B4F0931244E_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_EA6B477BC7D766C58A055B4F0931244E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Gross</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_EA6B477BC7D766C58A055B4F0931244E_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_EA6B477BC7D766C58A055B4F0931244E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_EA6B477BC7D766C58A055B4F0931244E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_EA6B477BC7D766C58A055B4F0931244E" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentGross_EA6B477BC7D766C58A055B4F0931244E" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_13EFC75AE112291967EE5B4F0931483E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_13EFC75AE112291967EE5B4F0931483E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less accumulated depreciation and amortization</link:label>
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_13EFC75AE112291967EE5B4F0931483E_label_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_13EFC75AE112291967EE5B4F0931483E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_13EFC75AE112291967EE5B4F0931483E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_13EFC75AE112291967EE5B4F0931483E" xlink:to="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_13EFC75AE112291967EE5B4F0931483E" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_A917EE53A270D8F3216A5B4F093132DA_totalLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_A917EE53A270D8F3216A5B4F093132DA" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_A917EE53A270D8F3216A5B4F093132DA_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_A917EE53A270D8F3216A5B4F093132DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_A917EE53A270D8F3216A5B4F093132DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_A917EE53A270D8F3216A5B4F093132DA" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_A917EE53A270D8F3216A5B4F093132DA" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepreciationAndAmortization_CC1CBFADD1102283E17A5B4F09311019_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationAndAmortization_CC1CBFADD1102283E17A5B4F09311019" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation and amortization expense</link:label>
    <link:label id="lab_us-gaap_DepreciationAndAmortization_CC1CBFADD1102283E17A5B4F09311019_label_en-US" xlink:label="lab_us-gaap_DepreciationAndAmortization_CC1CBFADD1102283E17A5B4F09311019" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation, Depletion and Amortization, Nonproduction</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_CC1CBFADD1102283E17A5B4F09311019" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationAndAmortization_CC1CBFADD1102283E17A5B4F09311019" xlink:to="lab_us-gaap_DepreciationAndAmortization_CC1CBFADD1102283E17A5B4F09311019" xlink:type="arc" />
    <link:label id="lab_colb_BalanceSheetOffsettingAbstract_AA658F3BC8277718807FF28D83ACBDCE_label_en-US" xlink:label="lab_colb_BalanceSheetOffsettingAbstract_AA658F3BC8277718807FF28D83ACBDCE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balance Sheet Offsetting [Abstract]</link:label>
    <link:label id="lab_colb_BalanceSheetOffsettingAbstract_AA658F3BC8277718807FF28D83ACBDCE_documentation_en-US" xlink:label="lab_colb_BalanceSheetOffsettingAbstract_AA658F3BC8277718807FF28D83ACBDCE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Balance Sheet Offsetting [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BalanceSheetOffsettingAbstract" xlink:label="loc_colb_BalanceSheetOffsettingAbstract_AA658F3BC8277718807FF28D83ACBDCE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BalanceSheetOffsettingAbstract_AA658F3BC8277718807FF28D83ACBDCE" xlink:to="lab_colb_BalanceSheetOffsettingAbstract_AA658F3BC8277718807FF28D83ACBDCE" xlink:type="arc" />
    <link:label id="lab_colb_BalanceSheetOffsettingTable_2849D9F534FEB9812422F28D83ACE7C6_terseLabel_en-US" xlink:label="lab_colb_BalanceSheetOffsettingTable_2849D9F534FEB9812422F28D83ACE7C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balance Sheet Offsetting [Table]</link:label>
    <link:label id="lab_colb_BalanceSheetOffsettingTable_2849D9F534FEB9812422F28D83ACE7C6_label_en-US" xlink:label="lab_colb_BalanceSheetOffsettingTable_2849D9F534FEB9812422F28D83ACE7C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balance Sheet Offsetting [Table]</link:label>
    <link:label id="lab_colb_BalanceSheetOffsettingTable_2849D9F534FEB9812422F28D83ACE7C6_documentation_en-US" xlink:label="lab_colb_BalanceSheetOffsettingTable_2849D9F534FEB9812422F28D83ACE7C6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Balance Sheet Offsetting [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BalanceSheetOffsettingTable" xlink:label="loc_colb_BalanceSheetOffsettingTable_2849D9F534FEB9812422F28D83ACE7C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BalanceSheetOffsettingTable_2849D9F534FEB9812422F28D83ACE7C6" xlink:to="lab_colb_BalanceSheetOffsettingTable_2849D9F534FEB9812422F28D83ACE7C6" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4663E8EED0722C963CBEF28D83BB02A3_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4663E8EED0722C963CBEF28D83BB02A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis" xlink:label="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4663E8EED0722C963CBEF28D83BB02A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4663E8EED0722C963CBEF28D83BB02A3" xlink:to="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis_4663E8EED0722C963CBEF28D83BB02A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_6F2C185DE6DD3ED65654F28D83BB7FBF_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis_6F2C185DE6DD3ED65654F28D83BB7FBF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivatives, Fair Value, by Balance Sheet Location [Axis]</link:label>
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_6F2C185DE6DD3ED65654F28D83BB7FBF_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis_6F2C185DE6DD3ED65654F28D83BB7FBF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_6F2C185DE6DD3ED65654F28D83BB7FBF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6F2C185DE6DD3ED65654F28D83BB7FBF" xlink:to="lab_us-gaap_BalanceSheetLocationAxis_6F2C185DE6DD3ED65654F28D83BB7FBF" xlink:type="arc" />
    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_D8FF26721B16C1579A50F28D83BBC782_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain_D8FF26721B16C1579A50F28D83BBC782" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Domain]</link:label>
    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_D8FF26721B16C1579A50F28D83BBC782_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain_D8FF26721B16C1579A50F28D83BBC782" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_D8FF26721B16C1579A50F28D83BBC782" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_D8FF26721B16C1579A50F28D83BBC782" xlink:to="lab_us-gaap_BalanceSheetLocationDomain_D8FF26721B16C1579A50F28D83BBC782" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAssetsMember_09EEE06FD0A3CCAD8924F28D83BBC88A_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsMember_09EEE06FD0A3CCAD8924F28D83BBC88A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Assets [Member]</link:label>
    <link:label id="lab_us-gaap_OtherAssetsMember_09EEE06FD0A3CCAD8924F28D83BBC88A_label_en-US" xlink:label="lab_us-gaap_OtherAssetsMember_09EEE06FD0A3CCAD8924F28D83BBC88A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsMember" xlink:label="loc_us-gaap_OtherAssetsMember_09EEE06FD0A3CCAD8924F28D83BBC88A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsMember_09EEE06FD0A3CCAD8924F28D83BBC88A" xlink:to="lab_us-gaap_OtherAssetsMember_09EEE06FD0A3CCAD8924F28D83BBC88A" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherLiabilitiesMember_18B58CEAE6D70AFE7B5AF28D83BBD77F_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesMember_18B58CEAE6D70AFE7B5AF28D83BBD77F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Liabilities [Member]</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesMember_18B58CEAE6D70AFE7B5AF28D83BBD77F_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesMember_18B58CEAE6D70AFE7B5AF28D83BBD77F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesMember" xlink:label="loc_us-gaap_OtherLiabilitiesMember_18B58CEAE6D70AFE7B5AF28D83BBD77F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesMember_18B58CEAE6D70AFE7B5AF28D83BBD77F" xlink:to="lab_us-gaap_OtherLiabilitiesMember_18B58CEAE6D70AFE7B5AF28D83BBD77F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_D5ED0C93ED9E7AD9B5E3F28D83BB30B6_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis_D5ED0C93ED9E7AD9B5E3F28D83BB30B6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) by Derivative Instrument Risk [Axis]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_D5ED0C93ED9E7AD9B5E3F28D83BB30B6_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis_D5ED0C93ED9E7AD9B5E3F28D83BB30B6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_D5ED0C93ED9E7AD9B5E3F28D83BB30B6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_D5ED0C93ED9E7AD9B5E3F28D83BB30B6" xlink:to="lab_us-gaap_DerivativeInstrumentRiskAxis_D5ED0C93ED9E7AD9B5E3F28D83BB30B6" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_33E0095372B1F6FFD37DF28D83BB073F_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain_33E0095372B1F6FFD37DF28D83BB073F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Contract Type [Domain]</link:label>
    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_33E0095372B1F6FFD37DF28D83BB073F_label_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain_33E0095372B1F6FFD37DF28D83BB073F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Contract [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_33E0095372B1F6FFD37DF28D83BB073F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_33E0095372B1F6FFD37DF28D83BB073F" xlink:to="lab_us-gaap_DerivativeContractTypeDomain_33E0095372B1F6FFD37DF28D83BB073F" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestRateContractMember_9179E4FDD504F1E9F83BF28D83BB50DD_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateContractMember_9179E4FDD504F1E9F83BF28D83BB50DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Contracts [Member]</link:label>
    <link:label id="lab_us-gaap_InterestRateContractMember_9179E4FDD504F1E9F83BF28D83BB50DD_label_en-US" xlink:label="lab_us-gaap_InterestRateContractMember_9179E4FDD504F1E9F83BF28D83BB50DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Contract [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateContractMember" xlink:label="loc_us-gaap_InterestRateContractMember_9179E4FDD504F1E9F83BF28D83BB50DD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateContractMember_9179E4FDD504F1E9F83BF28D83BB50DD" xlink:to="lab_us-gaap_InterestRateContractMember_9179E4FDD504F1E9F83BF28D83BB50DD" xlink:type="arc" />
    <link:label id="lab_colb_BalanceSheetOffsettingLineItems_15C700439D022D89B575F28D83BB95B7_terseLabel_en-US" xlink:label="lab_colb_BalanceSheetOffsettingLineItems_15C700439D022D89B575F28D83BB95B7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balance Sheet Offsetting [Line Items]</link:label>
    <link:label id="lab_colb_BalanceSheetOffsettingLineItems_15C700439D022D89B575F28D83BB95B7_label_en-US" xlink:label="lab_colb_BalanceSheetOffsettingLineItems_15C700439D022D89B575F28D83BB95B7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Balance Sheet Offsetting [Line Items]</link:label>
    <link:label id="lab_colb_BalanceSheetOffsettingLineItems_15C700439D022D89B575F28D83BB95B7_documentation_en-US" xlink:label="lab_colb_BalanceSheetOffsettingLineItems_15C700439D022D89B575F28D83BB95B7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Line Items] for Balance Sheet Offsetting [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BalanceSheetOffsettingLineItems" xlink:label="loc_colb_BalanceSheetOffsettingLineItems_15C700439D022D89B575F28D83BB95B7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BalanceSheetOffsettingLineItems_15C700439D022D89B575F28D83BB95B7" xlink:to="lab_colb_BalanceSheetOffsettingLineItems_15C700439D022D89B575F28D83BB95B7" xlink:type="arc" />
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermCarryingAmount_1D76C06F7223FE0B344CF28D83BB1B3D_terseLabel_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermCarryingAmount_1D76C06F7223FE0B344CF28D83BB1B3D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Term, Carrying Amounts</link:label>
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermCarryingAmount_1D76C06F7223FE0B344CF28D83BB1B3D_label_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermCarryingAmount_1D76C06F7223FE0B344CF28D83BB1B3D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Term, Carrying Amount</link:label>
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermCarryingAmount_1D76C06F7223FE0B344CF28D83BB1B3D_documentation_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermCarryingAmount_1D76C06F7223FE0B344CF28D83BB1B3D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carrying amount of assets sold under term agreements to repurchase when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AssetsSoldunderAgreementstoRepurchaseTermCarryingAmount" xlink:label="loc_colb_AssetsSoldunderAgreementstoRepurchaseTermCarryingAmount_1D76C06F7223FE0B344CF28D83BB1B3D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AssetsSoldunderAgreementstoRepurchaseTermCarryingAmount_1D76C06F7223FE0B344CF28D83BB1B3D" xlink:to="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermCarryingAmount_1D76C06F7223FE0B344CF28D83BB1B3D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_71531024B14479FD9951F28D83BB4ED1_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_71531024B14479FD9951F28D83BB4ED1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Asset, Fair Value, Gross Asset</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_71531024B14479FD9951F28D83BB4ED1_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_71531024B14479FD9951F28D83BB4ED1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Fair Value, Gross Asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_71531024B14479FD9951F28D83BB4ED1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_71531024B14479FD9951F28D83BB4ED1" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_71531024B14479FD9951F28D83BB4ED1" xlink:type="arc" />
    <link:label id="lab_colb_DerivativeAssetsGrossAmountsOffsetintheBalanceSheets_C0BBC5A7D5807652267FF28D83BBEA4D_terseLabel_en-US" xlink:label="lab_colb_DerivativeAssetsGrossAmountsOffsetintheBalanceSheets_C0BBC5A7D5807652267FF28D83BBEA4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Assets, Gross Amounts Offset in the Balance Sheets</link:label>
    <link:label id="lab_colb_DerivativeAssetsGrossAmountsOffsetintheBalanceSheets_C0BBC5A7D5807652267FF28D83BBEA4D_label_en-US" xlink:label="lab_colb_DerivativeAssetsGrossAmountsOffsetintheBalanceSheets_C0BBC5A7D5807652267FF28D83BBEA4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Assets, Gross Amounts Offset in the Balance Sheets</link:label>
    <link:label id="lab_colb_DerivativeAssetsGrossAmountsOffsetintheBalanceSheets_C0BBC5A7D5807652267FF28D83BBEA4D_documentation_en-US" xlink:label="lab_colb_DerivativeAssetsGrossAmountsOffsetintheBalanceSheets_C0BBC5A7D5807652267FF28D83BBEA4D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Derivative Assets, Gross Amounts Offset in the Balance Sheets</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DerivativeAssetsGrossAmountsOffsetintheBalanceSheets" xlink:label="loc_colb_DerivativeAssetsGrossAmountsOffsetintheBalanceSheets_C0BBC5A7D5807652267FF28D83BBEA4D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DerivativeAssetsGrossAmountsOffsetintheBalanceSheets_C0BBC5A7D5807652267FF28D83BBEA4D" xlink:to="lab_colb_DerivativeAssetsGrossAmountsOffsetintheBalanceSheets_C0BBC5A7D5807652267FF28D83BBEA4D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeAssets_EB0DBCF85F952440F89EF28D83BB8B32_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssets_EB0DBCF85F952440F89EF28D83BB8B32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Asset</link:label>
    <link:label id="lab_us-gaap_DerivativeAssets_EB0DBCF85F952440F89EF28D83BB8B32_label_en-US" xlink:label="lab_us-gaap_DerivativeAssets_EB0DBCF85F952440F89EF28D83BB8B32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeAssets" xlink:label="loc_us-gaap_DerivativeAssets_EB0DBCF85F952440F89EF28D83BB8B32" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssets_EB0DBCF85F952440F89EF28D83BB8B32" xlink:to="lab_us-gaap_DerivativeAssets_EB0DBCF85F952440F89EF28D83BB8B32" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeCollateralObligationToReturnSecurities_A622A520219573A9A19BF28D83BBE2C3_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DerivativeCollateralObligationToReturnSecurities_A622A520219573A9A19BF28D83BBE2C3" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Derivative, Collateral, Obligation to Return Securities</link:label>
    <link:label id="lab_us-gaap_DerivativeCollateralObligationToReturnSecurities_A622A520219573A9A19BF28D83BBE2C3_label_en-US" xlink:label="lab_us-gaap_DerivativeCollateralObligationToReturnSecurities_A622A520219573A9A19BF28D83BBE2C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Collateral, Obligation to Return Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeCollateralObligationToReturnSecurities" xlink:label="loc_us-gaap_DerivativeCollateralObligationToReturnSecurities_A622A520219573A9A19BF28D83BBE2C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeCollateralObligationToReturnSecurities_A622A520219573A9A19BF28D83BBE2C3" xlink:to="lab_us-gaap_DerivativeCollateralObligationToReturnSecurities_A622A520219573A9A19BF28D83BBE2C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_6E525FC89395DB6B7DF6F28D83BB0F98_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_6E525FC89395DB6B7DF6F28D83BB0F98" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Asset, Fair Value, Amount Not Offset Against Collateral</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_6E525FC89395DB6B7DF6F28D83BB0F98_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_6E525FC89395DB6B7DF6F28D83BB0F98" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Fair Value, Amount Not Offset Against Collateral</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_6E525FC89395DB6B7DF6F28D83BB0F98" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_6E525FC89395DB6B7DF6F28D83BB0F98" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_6E525FC89395DB6B7DF6F28D83BB0F98" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_8D498596F9C50F66E3B6F28D83BBD614_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_8D498596F9C50F66E3B6F28D83BBD614" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Liability, Fair Value, Gross Liability</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_8D498596F9C50F66E3B6F28D83BBD614_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_8D498596F9C50F66E3B6F28D83BBD614" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Fair Value, Gross Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_8D498596F9C50F66E3B6F28D83BBD614" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_8D498596F9C50F66E3B6F28D83BBD614" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_8D498596F9C50F66E3B6F28D83BBD614" xlink:type="arc" />
    <link:label id="lab_colb_DerivativeLiabilityGrossAmountsOffsetinBalanceSheets_6C41ECE3D5CE3A1893E2F28D83BBBD7C_terseLabel_en-US" xlink:label="lab_colb_DerivativeLiabilityGrossAmountsOffsetinBalanceSheets_6C41ECE3D5CE3A1893E2F28D83BBBD7C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Liability, Gross Amounts Offset in Balance Sheets</link:label>
    <link:label id="lab_colb_DerivativeLiabilityGrossAmountsOffsetinBalanceSheets_6C41ECE3D5CE3A1893E2F28D83BBBD7C_label_en-US" xlink:label="lab_colb_DerivativeLiabilityGrossAmountsOffsetinBalanceSheets_6C41ECE3D5CE3A1893E2F28D83BBBD7C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Gross Amounts Offset in Balance Sheets</link:label>
    <link:label id="lab_colb_DerivativeLiabilityGrossAmountsOffsetinBalanceSheets_6C41ECE3D5CE3A1893E2F28D83BBBD7C_documentation_en-US" xlink:label="lab_colb_DerivativeLiabilityGrossAmountsOffsetinBalanceSheets_6C41ECE3D5CE3A1893E2F28D83BBBD7C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Derivative Liability, Gross Amounts Offset in Balance Sheets</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DerivativeLiabilityGrossAmountsOffsetinBalanceSheets" xlink:label="loc_colb_DerivativeLiabilityGrossAmountsOffsetinBalanceSheets_6C41ECE3D5CE3A1893E2F28D83BBBD7C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DerivativeLiabilityGrossAmountsOffsetinBalanceSheets_6C41ECE3D5CE3A1893E2F28D83BBBD7C" xlink:to="lab_colb_DerivativeLiabilityGrossAmountsOffsetinBalanceSheets_6C41ECE3D5CE3A1893E2F28D83BBBD7C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeLiabilities_E816203A52A9DAA9A988F28D83BB5207_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilities_E816203A52A9DAA9A988F28D83BB5207" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Liability</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilities_E816203A52A9DAA9A988F28D83BB5207_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilities_E816203A52A9DAA9A988F28D83BB5207" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilities" xlink:label="loc_us-gaap_DerivativeLiabilities_E816203A52A9DAA9A988F28D83BB5207" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilities_E816203A52A9DAA9A988F28D83BB5207" xlink:to="lab_us-gaap_DerivativeLiabilities_E816203A52A9DAA9A988F28D83BB5207" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeCollateralRightToReclaimSecurities_5A295078D6CECCEB595DF28D83BBE7D5_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DerivativeCollateralRightToReclaimSecurities_5A295078D6CECCEB595DF28D83BBE7D5" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Derivative, Collateral, Right to Reclaim Securities</link:label>
    <link:label id="lab_us-gaap_DerivativeCollateralRightToReclaimSecurities_5A295078D6CECCEB595DF28D83BBE7D5_label_en-US" xlink:label="lab_us-gaap_DerivativeCollateralRightToReclaimSecurities_5A295078D6CECCEB595DF28D83BBE7D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Collateral, Right to Reclaim Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeCollateralRightToReclaimSecurities" xlink:label="loc_us-gaap_DerivativeCollateralRightToReclaimSecurities_5A295078D6CECCEB595DF28D83BBE7D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeCollateralRightToReclaimSecurities_5A295078D6CECCEB595DF28D83BBE7D5" xlink:to="lab_us-gaap_DerivativeCollateralRightToReclaimSecurities_5A295078D6CECCEB595DF28D83BBE7D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_D1EE1A34AA04ED120D66F28D83BB88D7_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_D1EE1A34AA04ED120D66F28D83BB88D7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Liability, Fair Value, Amount Not Offset Against Collateral</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_D1EE1A34AA04ED120D66F28D83BB88D7_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_D1EE1A34AA04ED120D66F28D83BB88D7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Fair Value, Amount Not Offset Against Collateral</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_D1EE1A34AA04ED120D66F28D83BB88D7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_D1EE1A34AA04ED120D66F28D83BB88D7" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_D1EE1A34AA04ED120D66F28D83BB88D7" xlink:type="arc" />
    <link:label id="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross_4824D7655797A93B97A7F28D83BB02F0_terseLabel_en-US" xlink:label="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross_4824D7655797A93B97A7F28D83BB02F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Carrying Amount</link:label>
    <link:label id="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross_4824D7655797A93B97A7F28D83BB02F0_label_en-US" xlink:label="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross_4824D7655797A93B97A7F28D83BB02F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities Sold under Agreements to Repurchase, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross" xlink:label="loc_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross_4824D7655797A93B97A7F28D83BB02F0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross_4824D7655797A93B97A7F28D83BB02F0" xlink:to="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseGross_4824D7655797A93B97A7F28D83BB02F0" xlink:type="arc" />
    <link:label id="lab_colb_Repurchaseagreementsamountsoffsetinbalancesheet_2FE9FCFB5BE28D590FFBF28D83BB9642_terseLabel_en-US" xlink:label="lab_colb_Repurchaseagreementsamountsoffsetinbalancesheet_2FE9FCFB5BE28D590FFBF28D83BB9642" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repurchase agreements, amounts offset in balance sheet</link:label>
    <link:label id="lab_colb_Repurchaseagreementsamountsoffsetinbalancesheet_2FE9FCFB5BE28D590FFBF28D83BB9642_label_en-US" xlink:label="lab_colb_Repurchaseagreementsamountsoffsetinbalancesheet_2FE9FCFB5BE28D590FFBF28D83BB9642" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repurchase agreements, amounts offset in balance sheet</link:label>
    <link:label id="lab_colb_Repurchaseagreementsamountsoffsetinbalancesheet_2FE9FCFB5BE28D590FFBF28D83BB9642_documentation_en-US" xlink:label="lab_colb_Repurchaseagreementsamountsoffsetinbalancesheet_2FE9FCFB5BE28D590FFBF28D83BB9642" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Repurchase agreements, amounts offset in balance sheet</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Repurchaseagreementsamountsoffsetinbalancesheet" xlink:label="loc_colb_Repurchaseagreementsamountsoffsetinbalancesheet_2FE9FCFB5BE28D590FFBF28D83BB9642" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Repurchaseagreementsamountsoffsetinbalancesheet_2FE9FCFB5BE28D590FFBF28D83BB9642" xlink:to="lab_colb_Repurchaseagreementsamountsoffsetinbalancesheet_2FE9FCFB5BE28D590FFBF28D83BB9642" xlink:type="arc" />
    <link:label id="lab_colb_Repurchaseagreementsnetamountpresentedinstatementoffinancialposition_CE6D63CE993BEB11289BF28D83BBF332_terseLabel_en-US" xlink:label="lab_colb_Repurchaseagreementsnetamountpresentedinstatementoffinancialposition_CE6D63CE993BEB11289BF28D83BBF332" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">repurchase agreements, net amount presented in statement of financial position</link:label>
    <link:label id="lab_colb_Repurchaseagreementsnetamountpresentedinstatementoffinancialposition_CE6D63CE993BEB11289BF28D83BBF332_label_en-US" xlink:label="lab_colb_Repurchaseagreementsnetamountpresentedinstatementoffinancialposition_CE6D63CE993BEB11289BF28D83BBF332" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repurchase agreements, net amount presented in statement of financial position</link:label>
    <link:label id="lab_colb_Repurchaseagreementsnetamountpresentedinstatementoffinancialposition_CE6D63CE993BEB11289BF28D83BBF332_documentation_en-US" xlink:label="lab_colb_Repurchaseagreementsnetamountpresentedinstatementoffinancialposition_CE6D63CE993BEB11289BF28D83BBF332" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Repurchase Agreements, Net Amount Presented in Balance Sheets</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Repurchaseagreementsnetamountpresentedinstatementoffinancialposition" xlink:label="loc_colb_Repurchaseagreementsnetamountpresentedinstatementoffinancialposition_CE6D63CE993BEB11289BF28D83BBF332" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Repurchaseagreementsnetamountpresentedinstatementoffinancialposition_CE6D63CE993BEB11289BF28D83BBF332" xlink:to="lab_colb_Repurchaseagreementsnetamountpresentedinstatementoffinancialposition_CE6D63CE993BEB11289BF28D83BBF332" xlink:type="arc" />
    <link:label id="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities_7201C6DF301B92F37D0EF28D83BBD9B2_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities_7201C6DF301B92F37D0EF28D83BBD9B2" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities</link:label>
    <link:label id="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities_7201C6DF301B92F37D0EF28D83BBD9B2_label_en-US" xlink:label="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities_7201C6DF301B92F37D0EF28D83BBD9B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities" xlink:label="loc_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities_7201C6DF301B92F37D0EF28D83BBD9B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities_7201C6DF301B92F37D0EF28D83BBD9B2" xlink:to="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities_7201C6DF301B92F37D0EF28D83BBD9B2" xlink:type="arc" />
    <link:label id="lab_colb_Securitiessoldunderagreementstorepurchaseamountnotoffset_49F0E0050A599E14492DF28D83CB94AA_terseLabel_en-US" xlink:label="lab_colb_Securitiessoldunderagreementstorepurchaseamountnotoffset_49F0E0050A599E14492DF28D83CB94AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">securities sold under agreements to repurchase, amount not offset</link:label>
    <link:label id="lab_colb_Securitiessoldunderagreementstorepurchaseamountnotoffset_49F0E0050A599E14492DF28D83CB94AA_label_en-US" xlink:label="lab_colb_Securitiessoldunderagreementstorepurchaseamountnotoffset_49F0E0050A599E14492DF28D83CB94AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities sold under agreements to repurchase, amount not offset</link:label>
    <link:label id="lab_colb_Securitiessoldunderagreementstorepurchaseamountnotoffset_49F0E0050A599E14492DF28D83CB94AA_documentation_en-US" xlink:label="lab_colb_Securitiessoldunderagreementstorepurchaseamountnotoffset_49F0E0050A599E14492DF28D83CB94AA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Securities sold under agreements to repurchase, amount not offset</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Securitiessoldunderagreementstorepurchaseamountnotoffset" xlink:label="loc_colb_Securitiessoldunderagreementstorepurchaseamountnotoffset_49F0E0050A599E14492DF28D83CB94AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Securitiessoldunderagreementstorepurchaseamountnotoffset_49F0E0050A599E14492DF28D83CB94AA" xlink:to="lab_colb_Securitiessoldunderagreementstorepurchaseamountnotoffset_49F0E0050A599E14492DF28D83CB94AA" xlink:type="arc" />
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepCarryingAmount_6E00A856655F0B8C577FF28D83CB00E9_terseLabel_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepCarryingAmount_6E00A856655F0B8C577FF28D83CB00E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Sweep, Carrying Amount</link:label>
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepCarryingAmount_6E00A856655F0B8C577FF28D83CB00E9_label_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepCarryingAmount_6E00A856655F0B8C577FF28D83CB00E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Sweep, Carrying Amount</link:label>
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepCarryingAmount_6E00A856655F0B8C577FF28D83CB00E9_documentation_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepCarryingAmount_6E00A856655F0B8C577FF28D83CB00E9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carrying amount of assets sold under agreements to repurchase related to sweep products when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under repurchase agreements exceeds 10 percent of total assets.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AssetsSoldunderAgreementstoRepurchaseSweepCarryingAmount" xlink:label="loc_colb_AssetsSoldunderAgreementstoRepurchaseSweepCarryingAmount_6E00A856655F0B8C577FF28D83CB00E9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AssetsSoldunderAgreementstoRepurchaseSweepCarryingAmount_6E00A856655F0B8C577FF28D83CB00E9" xlink:to="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepCarryingAmount_6E00A856655F0B8C577FF28D83CB00E9" xlink:type="arc" />
    <link:label id="lab_us-gaap_SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement_094662EA60EB163C7213F28D83BB68D0_terseLabel_en-US" xlink:label="lab_us-gaap_SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement_094662EA60EB163C7213F28D83BB68D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement</link:label>
    <link:label id="lab_us-gaap_SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement_094662EA60EB163C7213F28D83BB68D0_label_en-US" xlink:label="lab_us-gaap_SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement_094662EA60EB163C7213F28D83BB68D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement" xlink:label="loc_us-gaap_SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement_094662EA60EB163C7213F28D83BB68D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement_094662EA60EB163C7213F28D83BB68D0" xlink:to="lab_us-gaap_SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement_094662EA60EB163C7213F28D83BB68D0" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41A22AA71255EBFFD9545B4F09407FF3_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41A22AA71255EBFFD9545B4F09407FF3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments and Contingent Liabilities</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41A22AA71255EBFFD9545B4F09407FF3_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41A22AA71255EBFFD9545B4F09407FF3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41A22AA71255EBFFD9545B4F09407FF3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41A22AA71255EBFFD9545B4F09407FF3" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_41A22AA71255EBFFD9545B4F09407FF3" xlink:type="arc" />
    <link:label id="lab_us-gaap_USTreasurySecuritiesMember_25C047EA14F13608674BB9FB9EACE069_terseLabel_en-US" xlink:label="lab_us-gaap_USTreasurySecuritiesMember_25C047EA14F13608674BB9FB9EACE069" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">US Government Securities [Member]</link:label>
    <link:label id="lab_us-gaap_USTreasurySecuritiesMember_25C047EA14F13608674BB9FB9EACE069_label_en-US" xlink:label="lab_us-gaap_USTreasurySecuritiesMember_25C047EA14F13608674BB9FB9EACE069" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Treasury Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USTreasurySecuritiesMember" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_25C047EA14F13608674BB9FB9EACE069" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USTreasurySecuritiesMember_25C047EA14F13608674BB9FB9EACE069" xlink:to="lab_us-gaap_USTreasurySecuritiesMember_25C047EA14F13608674BB9FB9EACE069" xlink:type="arc" />
    <link:label id="lab_colb_OtherSecuritiesMember_1C7CBFB2887EF87A8416B9FB9EACA95B_terseLabel_en-US" xlink:label="lab_colb_OtherSecuritiesMember_1C7CBFB2887EF87A8416B9FB9EACA95B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Securities [Member]</link:label>
    <link:label id="lab_colb_OtherSecuritiesMember_1C7CBFB2887EF87A8416B9FB9EACA95B_label_en-US" xlink:label="lab_colb_OtherSecuritiesMember_1C7CBFB2887EF87A8416B9FB9EACA95B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Securities [Member]</link:label>
    <link:label id="lab_colb_OtherSecuritiesMember_1C7CBFB2887EF87A8416B9FB9EACA95B_documentation_en-US" xlink:label="lab_colb_OtherSecuritiesMember_1C7CBFB2887EF87A8416B9FB9EACA95B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other securities [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OtherSecuritiesMember" xlink:label="loc_colb_OtherSecuritiesMember_1C7CBFB2887EF87A8416B9FB9EACA95B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OtherSecuritiesMember_1C7CBFB2887EF87A8416B9FB9EACA95B" xlink:to="lab_colb_OtherSecuritiesMember_1C7CBFB2887EF87A8416B9FB9EACA95B" xlink:type="arc" />
    <link:label id="lab_colb_USGovernmentAgencyAndGovernmentSponsoredEnterpriseMortgageBackedSecuritiesAndCollateralizedMortgageObligationsMember_409A8EAAA8361872EC29B9FB9EAC9A08_terseLabel_en-US" xlink:label="lab_colb_USGovernmentAgencyAndGovernmentSponsoredEnterpriseMortgageBackedSecuritiesAndCollateralizedMortgageObligationsMember_409A8EAAA8361872EC29B9FB9EAC9A08" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]</link:label>
    <link:label id="lab_colb_USGovernmentAgencyAndGovernmentSponsoredEnterpriseMortgageBackedSecuritiesAndCollateralizedMortgageObligationsMember_409A8EAAA8361872EC29B9FB9EAC9A08_label_en-US" xlink:label="lab_colb_USGovernmentAgencyAndGovernmentSponsoredEnterpriseMortgageBackedSecuritiesAndCollateralizedMortgageObligationsMember_409A8EAAA8361872EC29B9FB9EAC9A08" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]</link:label>
    <link:label id="lab_colb_USGovernmentAgencyAndGovernmentSponsoredEnterpriseMortgageBackedSecuritiesAndCollateralizedMortgageObligationsMember_409A8EAAA8361872EC29B9FB9EAC9A08_documentation_en-US" xlink:label="lab_colb_USGovernmentAgencyAndGovernmentSponsoredEnterpriseMortgageBackedSecuritiesAndCollateralizedMortgageObligationsMember_409A8EAAA8361872EC29B9FB9EAC9A08" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">U S Government Agency and Government Sponsored Enterprise Mortgage Backed Securities And Collateralized Mortgage Obligations [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_USGovernmentAgencyAndGovernmentSponsoredEnterpriseMortgageBackedSecuritiesAndCollateralizedMortgageObligationsMember" xlink:label="loc_colb_USGovernmentAgencyAndGovernmentSponsoredEnterpriseMortgageBackedSecuritiesAndCollateralizedMortgageObligationsMember_409A8EAAA8361872EC29B9FB9EAC9A08" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_USGovernmentAgencyAndGovernmentSponsoredEnterpriseMortgageBackedSecuritiesAndCollateralizedMortgageObligationsMember_409A8EAAA8361872EC29B9FB9EAC9A08" xlink:to="lab_colb_USGovernmentAgencyAndGovernmentSponsoredEnterpriseMortgageBackedSecuritiesAndCollateralizedMortgageObligationsMember_409A8EAAA8361872EC29B9FB9EAC9A08" xlink:type="arc" />
    <link:label id="lab_us-gaap_MunicipalBondsMember_80F7F3012CC62E4AA13FB9FB9EACEEFC_verboseLabel_en-US" xlink:label="lab_us-gaap_MunicipalBondsMember_80F7F3012CC62E4AA13FB9FB9EACEEFC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Municipal Bonds [Member]</link:label>
    <link:label id="lab_us-gaap_MunicipalBondsMember_80F7F3012CC62E4AA13FB9FB9EACEEFC_label_en-US" xlink:label="lab_us-gaap_MunicipalBondsMember_80F7F3012CC62E4AA13FB9FB9EACEEFC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Municipal Bonds [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MunicipalBondsMember" xlink:label="loc_us-gaap_MunicipalBondsMember_80F7F3012CC62E4AA13FB9FB9EACEEFC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MunicipalBondsMember_80F7F3012CC62E4AA13FB9FB9EACEEFC" xlink:to="lab_us-gaap_MunicipalBondsMember_80F7F3012CC62E4AA13FB9FB9EACEEFC" xlink:type="arc" />
    <link:label id="lab_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_83D9B7121EF9B803BA74B9FB9EAC9067_terseLabel_en-US" xlink:label="lab_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_83D9B7121EF9B803BA74B9FB9EAC9067" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">US Government Corporations and Agencies Securities [Member]</link:label>
    <link:label id="lab_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_83D9B7121EF9B803BA74B9FB9EAC9067_label_en-US" xlink:label="lab_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_83D9B7121EF9B803BA74B9FB9EAC9067" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Government Corporations and Agencies Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_83D9B7121EF9B803BA74B9FB9EAC9067" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_83D9B7121EF9B803BA74B9FB9EAC9067" xlink:to="lab_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_83D9B7121EF9B803BA74B9FB9EAC9067" xlink:type="arc" />
    <link:label id="lab_colb_NumberOfIssuancesOfSecuritiesExceedingShareholdersEquityThreshold_9195E3AC00295A985CC1B9FB9EAC9369_terseLabel_en-US" xlink:label="lab_colb_NumberOfIssuancesOfSecuritiesExceedingShareholdersEquityThreshold_9195E3AC00295A985CC1B9FB9EAC9369" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number Of Issuances Of Securities Exceeding Shareholders Equity Threshold</link:label>
    <link:label id="lab_colb_NumberOfIssuancesOfSecuritiesExceedingShareholdersEquityThreshold_9195E3AC00295A985CC1B9FB9EAC9369_label_en-US" xlink:label="lab_colb_NumberOfIssuancesOfSecuritiesExceedingShareholdersEquityThreshold_9195E3AC00295A985CC1B9FB9EAC9369" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Issuances Of Securities Exceeding Shareholders Equity Threshold</link:label>
    <link:label id="lab_colb_NumberOfIssuancesOfSecuritiesExceedingShareholdersEquityThreshold_9195E3AC00295A985CC1B9FB9EAC9369_documentation_en-US" xlink:label="lab_colb_NumberOfIssuancesOfSecuritiesExceedingShareholdersEquityThreshold_9195E3AC00295A985CC1B9FB9EAC9369" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Issuances Of Securities Exceeding Shareholders Equity Threshold</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_NumberOfIssuancesOfSecuritiesExceedingShareholdersEquityThreshold" xlink:label="loc_colb_NumberOfIssuancesOfSecuritiesExceedingShareholdersEquityThreshold_9195E3AC00295A985CC1B9FB9EAC9369" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_NumberOfIssuancesOfSecuritiesExceedingShareholdersEquityThreshold_9195E3AC00295A985CC1B9FB9EAC9369" xlink:to="lab_colb_NumberOfIssuancesOfSecuritiesExceedingShareholdersEquityThreshold_9195E3AC00295A985CC1B9FB9EAC9369" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_AACFD0509EE9112E73D5B9FB9EACE66B_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_AACFD0509EE9112E73D5B9FB9EACE66B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Debt Securities, Available-for-sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_AACFD0509EE9112E73D5B9FB9EACE66B_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_AACFD0509EE9112E73D5B9FB9EACE66B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Debt Securities, Available-for-sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_AACFD0509EE9112E73D5B9FB9EACE66B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_AACFD0509EE9112E73D5B9FB9EACE66B" xlink:to="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_AACFD0509EE9112E73D5B9FB9EACE66B" xlink:type="arc" />
    <link:label id="lab_colb_NumberOfSecuritiesInUnrealizedLossPosition_08925F8E7971937BAFC2B9FB9EAC9B63_terseLabel_en-US" xlink:label="lab_colb_NumberOfSecuritiesInUnrealizedLossPosition_08925F8E7971937BAFC2B9FB9EAC9B63" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number Of Securities In Unrealized Loss Position</link:label>
    <link:label id="lab_colb_NumberOfSecuritiesInUnrealizedLossPosition_08925F8E7971937BAFC2B9FB9EAC9B63_label_en-US" xlink:label="lab_colb_NumberOfSecuritiesInUnrealizedLossPosition_08925F8E7971937BAFC2B9FB9EAC9B63" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Securities In Unrealized Loss Position</link:label>
    <link:label id="lab_colb_NumberOfSecuritiesInUnrealizedLossPosition_08925F8E7971937BAFC2B9FB9EAC9B63_documentation_en-US" xlink:label="lab_colb_NumberOfSecuritiesInUnrealizedLossPosition_08925F8E7971937BAFC2B9FB9EAC9B63" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Securities In Unrealized Loss Position</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_NumberOfSecuritiesInUnrealizedLossPosition" xlink:label="loc_colb_NumberOfSecuritiesInUnrealizedLossPosition_08925F8E7971937BAFC2B9FB9EAC9B63" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_NumberOfSecuritiesInUnrealizedLossPosition_08925F8E7971937BAFC2B9FB9EAC9B63" xlink:to="lab_colb_NumberOfSecuritiesInUnrealizedLossPosition_08925F8E7971937BAFC2B9FB9EAC9B63" xlink:type="arc" />
    <link:label id="lab_colb_NumberOfSecuritiesInContinuousLossPositionForTwelveMonthsOrMore_6C8354F62A7E059588EBB9FB9EACAF2C_terseLabel_en-US" xlink:label="lab_colb_NumberOfSecuritiesInContinuousLossPositionForTwelveMonthsOrMore_6C8354F62A7E059588EBB9FB9EACAF2C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number Of Securities In Continuous Loss Position For Twelve Months or More</link:label>
    <link:label id="lab_colb_NumberOfSecuritiesInContinuousLossPositionForTwelveMonthsOrMore_6C8354F62A7E059588EBB9FB9EACAF2C_label_en-US" xlink:label="lab_colb_NumberOfSecuritiesInContinuousLossPositionForTwelveMonthsOrMore_6C8354F62A7E059588EBB9FB9EACAF2C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Securities In Continuous Loss Position For Twelve Months or More</link:label>
    <link:label id="lab_colb_NumberOfSecuritiesInContinuousLossPositionForTwelveMonthsOrMore_6C8354F62A7E059588EBB9FB9EACAF2C_documentation_en-US" xlink:label="lab_colb_NumberOfSecuritiesInContinuousLossPositionForTwelveMonthsOrMore_6C8354F62A7E059588EBB9FB9EACAF2C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Securities In Continuous Loss Position for 12 months or more.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_NumberOfSecuritiesInContinuousLossPositionForTwelveMonthsOrMore" xlink:label="loc_colb_NumberOfSecuritiesInContinuousLossPositionForTwelveMonthsOrMore_6C8354F62A7E059588EBB9FB9EACAF2C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_NumberOfSecuritiesInContinuousLossPositionForTwelveMonthsOrMore_6C8354F62A7E059588EBB9FB9EACAF2C" xlink:to="lab_colb_NumberOfSecuritiesInContinuousLossPositionForTwelveMonthsOrMore_6C8354F62A7E059588EBB9FB9EACAF2C" xlink:type="arc" />
    <link:label id="lab_colb_IssuancesOfSecuritiesExceedingShareholdersEquityThresholdPercent_E53F480A79B52844D8BBB9FB9EAECAD3_terseLabel_en-US" xlink:label="lab_colb_IssuancesOfSecuritiesExceedingShareholdersEquityThresholdPercent_E53F480A79B52844D8BBB9FB9EAECAD3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuances Of Securities Exceeding Shareholders Equity Threshold, Percent</link:label>
    <link:label id="lab_colb_IssuancesOfSecuritiesExceedingShareholdersEquityThresholdPercent_E53F480A79B52844D8BBB9FB9EAECAD3_label_en-US" xlink:label="lab_colb_IssuancesOfSecuritiesExceedingShareholdersEquityThresholdPercent_E53F480A79B52844D8BBB9FB9EAECAD3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Issuances Of Securities Exceeding Shareholders Equity Threshold, Percent</link:label>
    <link:label id="lab_colb_IssuancesOfSecuritiesExceedingShareholdersEquityThresholdPercent_E53F480A79B52844D8BBB9FB9EAECAD3_documentation_en-US" xlink:label="lab_colb_IssuancesOfSecuritiesExceedingShareholdersEquityThresholdPercent_E53F480A79B52844D8BBB9FB9EAECAD3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Issuances Of Securities Exceeding Shareholders Equity Threshold, Percent</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_IssuancesOfSecuritiesExceedingShareholdersEquityThresholdPercent" xlink:label="loc_colb_IssuancesOfSecuritiesExceedingShareholdersEquityThresholdPercent_E53F480A79B52844D8BBB9FB9EAECAD3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_IssuancesOfSecuritiesExceedingShareholdersEquityThresholdPercent_E53F480A79B52844D8BBB9FB9EAECAD3" xlink:to="lab_colb_IssuancesOfSecuritiesExceedingShareholdersEquityThresholdPercent_E53F480A79B52844D8BBB9FB9EAECAD3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_661CC58750C06D8356315B4F0A4A00CA_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_661CC58750C06D8356315B4F0A4A00CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Financing Receivables Past Due [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_661CC58750C06D8356315B4F0A4A00CA_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_661CC58750C06D8356315B4F0A4A00CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Financing Receivables Past Due [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_661CC58750C06D8356315B4F0A4A00CA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_661CC58750C06D8356315B4F0A4A00CA" xlink:to="lab_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_661CC58750C06D8356315B4F0A4A00CA" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_A299C1966FDF1E0DD6AE5B4F0A4A8341_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_A299C1966FDF1E0DD6AE5B4F0A4A8341" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivables, Period Past Due [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_A299C1966FDF1E0DD6AE5B4F0A4A8341_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_A299C1966FDF1E0DD6AE5B4F0A4A8341" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivables, Period Past Due [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_A299C1966FDF1E0DD6AE5B4F0A4A8341" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_A299C1966FDF1E0DD6AE5B4F0A4A8341" xlink:to="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_A299C1966FDF1E0DD6AE5B4F0A4A8341" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_E5B19E187FB510E3BFC75B4F0A4A52DB_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_E5B19E187FB510E3BFC75B4F0A4A52DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivables, Period Past Due [Domain]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_E5B19E187FB510E3BFC75B4F0A4A52DB_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_E5B19E187FB510E3BFC75B4F0A4A52DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivables, Period Past Due [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_E5B19E187FB510E3BFC75B4F0A4A52DB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_E5B19E187FB510E3BFC75B4F0A4A52DB" xlink:to="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_E5B19E187FB510E3BFC75B4F0A4A52DB" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_A2FFA38B16A989819A275B4F0A4A689F_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_A2FFA38B16A989819A275B4F0A4A689F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivables, 30 to 59 Days Past Due [Member]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_A2FFA38B16A989819A275B4F0A4A689F_label_en-US" xlink:label="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_A2FFA38B16A989819A275B4F0A4A689F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivables, 30 to 59 Days Past Due [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivables30To59DaysPastDueMember" xlink:label="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_A2FFA38B16A989819A275B4F0A4A689F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_A2FFA38B16A989819A275B4F0A4A689F" xlink:to="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_A2FFA38B16A989819A275B4F0A4A689F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_2B6CDD626F4207D2F03B5B4F0A4A0798_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_2B6CDD626F4207D2F03B5B4F0A4A0798" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivables, 60 to 89 Days Past Due [Member]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_2B6CDD626F4207D2F03B5B4F0A4A0798_label_en-US" xlink:label="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_2B6CDD626F4207D2F03B5B4F0A4A0798" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivables, 60 to 89 Days Past Due [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivables60To89DaysPastDueMember" xlink:label="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_2B6CDD626F4207D2F03B5B4F0A4A0798" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_2B6CDD626F4207D2F03B5B4F0A4A0798" xlink:to="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_2B6CDD626F4207D2F03B5B4F0A4A0798" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_5912991E5A9117DDC1E15B4F0A4AB401_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_5912991E5A9117DDC1E15B4F0A4AB401" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivables, Equal to Greater than 90 Days Past Due [Member]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_5912991E5A9117DDC1E15B4F0A4AB401_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_5912991E5A9117DDC1E15B4F0A4AB401" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivables, Equal to Greater than 90 Days Past Due [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_5912991E5A9117DDC1E15B4F0A4AB401" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_5912991E5A9117DDC1E15B4F0A4AB401" xlink:to="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_5912991E5A9117DDC1E15B4F0A4AB401" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_6ED03B573C14F6D4004C5B4F0A4AEF5C_verboseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_6ED03B573C14F6D4004C5B4F0A4AEF5C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable Information by Portfolio Segment [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_6ED03B573C14F6D4004C5B4F0A4AEF5C_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_6ED03B573C14F6D4004C5B4F0A4AEF5C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Financing Receivable, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_6ED03B573C14F6D4004C5B4F0A4AEF5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_6ED03B573C14F6D4004C5B4F0A4AEF5C" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_6ED03B573C14F6D4004C5B4F0A4AEF5C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0BE96BAE546324356BBD5B4F0A4A523B_verboseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0BE96BAE546324356BBD5B4F0A4A523B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">FinancingReceivablebyPortfolioSegment [Domain]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0BE96BAE546324356BBD5B4F0A4A523B_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0BE96BAE546324356BBD5B4F0A4A523B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Financing Receivable, Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0BE96BAE546324356BBD5B4F0A4A523B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0BE96BAE546324356BBD5B4F0A4A523B" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_0BE96BAE546324356BBD5B4F0A4A523B" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommercialPortfolioSegmentMember_949B5841940958A9364C5B4F0A4A8F78_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialPortfolioSegmentMember_949B5841940958A9364C5B4F0A4A8F78" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial Portfolio Segment [Member]</link:label>
    <link:label id="lab_us-gaap_CommercialPortfolioSegmentMember_949B5841940958A9364C5B4F0A4A8F78_label_en-US" xlink:label="lab_us-gaap_CommercialPortfolioSegmentMember_949B5841940958A9364C5B4F0A4A8F78" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommercialPortfolioSegmentMember" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_949B5841940958A9364C5B4F0A4A8F78" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommercialPortfolioSegmentMember_949B5841940958A9364C5B4F0A4A8F78" xlink:to="lab_us-gaap_CommercialPortfolioSegmentMember_949B5841940958A9364C5B4F0A4A8F78" xlink:type="arc" />
    <link:label id="lab_colb_RealEstatePortfolioSegmentMember_0EC267DD362071635D005B4F0A4A0C73_terseLabel_en-US" xlink:label="lab_colb_RealEstatePortfolioSegmentMember_0EC267DD362071635D005B4F0A4A0C73" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real Estate Portfolio Segment [Member]</link:label>
    <link:label id="lab_colb_RealEstatePortfolioSegmentMember_0EC267DD362071635D005B4F0A4A0C73_label_en-US" xlink:label="lab_colb_RealEstatePortfolioSegmentMember_0EC267DD362071635D005B4F0A4A0C73" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Portfolio Segment [Member]</link:label>
    <link:label id="lab_colb_RealEstatePortfolioSegmentMember_0EC267DD362071635D005B4F0A4A0C73_documentation_en-US" xlink:label="lab_colb_RealEstatePortfolioSegmentMember_0EC267DD362071635D005B4F0A4A0C73" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Real Estate Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_RealEstatePortfolioSegmentMember" xlink:label="loc_colb_RealEstatePortfolioSegmentMember_0EC267DD362071635D005B4F0A4A0C73" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_RealEstatePortfolioSegmentMember_0EC267DD362071635D005B4F0A4A0C73" xlink:to="lab_colb_RealEstatePortfolioSegmentMember_0EC267DD362071635D005B4F0A4A0C73" xlink:type="arc" />
    <link:label id="lab_colb_RealEstateConstructionPortfolioSegmentMember_A40FEED4146E31FB43225B4F0A4A365E_terseLabel_en-US" xlink:label="lab_colb_RealEstateConstructionPortfolioSegmentMember_A40FEED4146E31FB43225B4F0A4A365E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real Estate Construction Portfolio Segment [Member]</link:label>
    <link:label id="lab_colb_RealEstateConstructionPortfolioSegmentMember_A40FEED4146E31FB43225B4F0A4A365E_label_en-US" xlink:label="lab_colb_RealEstateConstructionPortfolioSegmentMember_A40FEED4146E31FB43225B4F0A4A365E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Construction Portfolio Segment [Member]</link:label>
    <link:label id="lab_colb_RealEstateConstructionPortfolioSegmentMember_A40FEED4146E31FB43225B4F0A4A365E_documentation_en-US" xlink:label="lab_colb_RealEstateConstructionPortfolioSegmentMember_A40FEED4146E31FB43225B4F0A4A365E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Real Estate Construction Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_RealEstateConstructionPortfolioSegmentMember" xlink:label="loc_colb_RealEstateConstructionPortfolioSegmentMember_A40FEED4146E31FB43225B4F0A4A365E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_RealEstateConstructionPortfolioSegmentMember_A40FEED4146E31FB43225B4F0A4A365E" xlink:to="lab_colb_RealEstateConstructionPortfolioSegmentMember_A40FEED4146E31FB43225B4F0A4A365E" xlink:type="arc" />
    <link:label id="lab_colb_IncomePropertyMultifamilyConstructionMember_3B63F74DF60E9BBFCF825B4F0A4ABECD_terseLabel_en-US" xlink:label="lab_colb_IncomePropertyMultifamilyConstructionMember_3B63F74DF60E9BBFCF825B4F0A4ABECD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate construction: Commercial and multifamily residential: Income property [Member]</link:label>
    <link:label id="lab_colb_IncomePropertyMultifamilyConstructionMember_3B63F74DF60E9BBFCF825B4F0A4ABECD_label_en-US" xlink:label="lab_colb_IncomePropertyMultifamilyConstructionMember_3B63F74DF60E9BBFCF825B4F0A4ABECD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Property Multifamily Construction [Member]</link:label>
    <link:label id="lab_colb_IncomePropertyMultifamilyConstructionMember_3B63F74DF60E9BBFCF825B4F0A4ABECD_documentation_en-US" xlink:label="lab_colb_IncomePropertyMultifamilyConstructionMember_3B63F74DF60E9BBFCF825B4F0A4ABECD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income Property Multifamily Construction [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_IncomePropertyMultifamilyConstructionMember" xlink:label="loc_colb_IncomePropertyMultifamilyConstructionMember_3B63F74DF60E9BBFCF825B4F0A4ABECD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_IncomePropertyMultifamilyConstructionMember_3B63F74DF60E9BBFCF825B4F0A4ABECD" xlink:to="lab_colb_IncomePropertyMultifamilyConstructionMember_3B63F74DF60E9BBFCF825B4F0A4ABECD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConsumerPortfolioSegmentMember_24DDB3BF1B05AD9A9B695B4F0A4A0857_terseLabel_en-US" xlink:label="lab_us-gaap_ConsumerPortfolioSegmentMember_24DDB3BF1B05AD9A9B695B4F0A4A0857" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer [Member]</link:label>
    <link:label id="lab_us-gaap_ConsumerPortfolioSegmentMember_24DDB3BF1B05AD9A9B695B4F0A4A0857_label_en-US" xlink:label="lab_us-gaap_ConsumerPortfolioSegmentMember_24DDB3BF1B05AD9A9B695B4F0A4A0857" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consumer Portfolio Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConsumerPortfolioSegmentMember" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_24DDB3BF1B05AD9A9B695B4F0A4A0857" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConsumerPortfolioSegmentMember_24DDB3BF1B05AD9A9B695B4F0A4A0857" xlink:to="lab_us-gaap_ConsumerPortfolioSegmentMember_24DDB3BF1B05AD9A9B695B4F0A4A0857" xlink:type="arc" />
    <link:label id="lab_colb_SecuredLoansMember_13F624375DA3964439185B4F0A59DFE5_terseLabel_en-US" xlink:label="lab_colb_SecuredLoansMember_13F624375DA3964439185B4F0A59DFE5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial business: Secured loans [Member]</link:label>
    <link:label id="lab_colb_SecuredLoansMember_13F624375DA3964439185B4F0A59DFE5_label_en-US" xlink:label="lab_colb_SecuredLoansMember_13F624375DA3964439185B4F0A59DFE5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Secured Loans [Member]</link:label>
    <link:label id="lab_colb_SecuredLoansMember_13F624375DA3964439185B4F0A59DFE5_documentation_en-US" xlink:label="lab_colb_SecuredLoansMember_13F624375DA3964439185B4F0A59DFE5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Secured Loans [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_SecuredLoansMember" xlink:label="loc_colb_SecuredLoansMember_13F624375DA3964439185B4F0A59DFE5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_SecuredLoansMember_13F624375DA3964439185B4F0A59DFE5" xlink:to="lab_colb_SecuredLoansMember_13F624375DA3964439185B4F0A59DFE5" xlink:type="arc" />
    <link:label id="lab_colb_UnsecuredLoansMember_9335922FD25A8A8BDCD15B4F0A59E4DE_terseLabel_en-US" xlink:label="lab_colb_UnsecuredLoansMember_9335922FD25A8A8BDCD15B4F0A59E4DE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial business: Unsecured loans [Member]</link:label>
    <link:label id="lab_colb_UnsecuredLoansMember_9335922FD25A8A8BDCD15B4F0A59E4DE_label_en-US" xlink:label="lab_colb_UnsecuredLoansMember_9335922FD25A8A8BDCD15B4F0A59E4DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unsecured Loans [Member]</link:label>
    <link:label id="lab_colb_UnsecuredLoansMember_9335922FD25A8A8BDCD15B4F0A59E4DE_documentation_en-US" xlink:label="lab_colb_UnsecuredLoansMember_9335922FD25A8A8BDCD15B4F0A59E4DE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unsecured Loans [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_UnsecuredLoansMember" xlink:label="loc_colb_UnsecuredLoansMember_9335922FD25A8A8BDCD15B4F0A59E4DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_UnsecuredLoansMember_9335922FD25A8A8BDCD15B4F0A59E4DE" xlink:to="lab_colb_UnsecuredLoansMember_9335922FD25A8A8BDCD15B4F0A59E4DE" xlink:type="arc" />
    <link:label id="lab_colb_OneToFourFamilyResidentialMember_81CD9648ACF2279692B15B4F0A59649D_terseLabel_en-US" xlink:label="lab_colb_OneToFourFamilyResidentialMember_81CD9648ACF2279692B15B4F0A59649D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate: One-to-four family residential [Member]</link:label>
    <link:label id="lab_colb_OneToFourFamilyResidentialMember_81CD9648ACF2279692B15B4F0A59649D_label_en-US" xlink:label="lab_colb_OneToFourFamilyResidentialMember_81CD9648ACF2279692B15B4F0A59649D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">One-to-Four Family Residential [Member]</link:label>
    <link:label id="lab_colb_OneToFourFamilyResidentialMember_81CD9648ACF2279692B15B4F0A59649D_documentation_en-US" xlink:label="lab_colb_OneToFourFamilyResidentialMember_81CD9648ACF2279692B15B4F0A59649D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One-To-Four Family Residential [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OneToFourFamilyResidentialMember" xlink:label="loc_colb_OneToFourFamilyResidentialMember_81CD9648ACF2279692B15B4F0A59649D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OneToFourFamilyResidentialMember_81CD9648ACF2279692B15B4F0A59649D" xlink:to="lab_colb_OneToFourFamilyResidentialMember_81CD9648ACF2279692B15B4F0A59649D" xlink:type="arc" />
    <link:label id="lab_colb_CommercialLandMember_0279F5F74FA69E80CC9C5B4F0A590E77_terseLabel_en-US" xlink:label="lab_colb_CommercialLandMember_0279F5F74FA69E80CC9C5B4F0A590E77" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate: Commercial and multifamily residential: Commercial land [Member]</link:label>
    <link:label id="lab_colb_CommercialLandMember_0279F5F74FA69E80CC9C5B4F0A590E77_label_en-US" xlink:label="lab_colb_CommercialLandMember_0279F5F74FA69E80CC9C5B4F0A590E77" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial Land [Member]</link:label>
    <link:label id="lab_colb_CommercialLandMember_0279F5F74FA69E80CC9C5B4F0A590E77_documentation_en-US" xlink:label="lab_colb_CommercialLandMember_0279F5F74FA69E80CC9C5B4F0A590E77" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Commercial Land [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommercialLandMember" xlink:label="loc_colb_CommercialLandMember_0279F5F74FA69E80CC9C5B4F0A590E77" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommercialLandMember_0279F5F74FA69E80CC9C5B4F0A590E77" xlink:to="lab_colb_CommercialLandMember_0279F5F74FA69E80CC9C5B4F0A590E77" xlink:type="arc" />
    <link:label id="lab_colb_OwnerOccupiedMember_D506A461E60134C4FD305B4F0A59E9AB_terseLabel_en-US" xlink:label="lab_colb_OwnerOccupiedMember_D506A461E60134C4FD305B4F0A59E9AB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate: Commercial and multifamiIy residential: Owner occupied [Member]</link:label>
    <link:label id="lab_colb_OwnerOccupiedMember_D506A461E60134C4FD305B4F0A59E9AB_label_en-US" xlink:label="lab_colb_OwnerOccupiedMember_D506A461E60134C4FD305B4F0A59E9AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Owner Occupied [Member]</link:label>
    <link:label id="lab_colb_OwnerOccupiedMember_D506A461E60134C4FD305B4F0A59E9AB_documentation_en-US" xlink:label="lab_colb_OwnerOccupiedMember_D506A461E60134C4FD305B4F0A59E9AB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Owner Occupied [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OwnerOccupiedMember" xlink:label="loc_colb_OwnerOccupiedMember_D506A461E60134C4FD305B4F0A59E9AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OwnerOccupiedMember_D506A461E60134C4FD305B4F0A59E9AB" xlink:to="lab_colb_OwnerOccupiedMember_D506A461E60134C4FD305B4F0A59E9AB" xlink:type="arc" />
    <link:label id="lab_colb_LandAndAcquisitionMember_D7334B043536477916645B4F0A59404D_terseLabel_en-US" xlink:label="lab_colb_LandAndAcquisitionMember_D7334B043536477916645B4F0A59404D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate construction: One-to-four family residential: Land and acquisition [Member]</link:label>
    <link:label id="lab_colb_LandAndAcquisitionMember_D7334B043536477916645B4F0A59404D_label_en-US" xlink:label="lab_colb_LandAndAcquisitionMember_D7334B043536477916645B4F0A59404D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Land And Acquisition [Member]</link:label>
    <link:label id="lab_colb_LandAndAcquisitionMember_D7334B043536477916645B4F0A59404D_documentation_en-US" xlink:label="lab_colb_LandAndAcquisitionMember_D7334B043536477916645B4F0A59404D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Land And Acquisition [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LandAndAcquisitionMember" xlink:label="loc_colb_LandAndAcquisitionMember_D7334B043536477916645B4F0A59404D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LandAndAcquisitionMember_D7334B043536477916645B4F0A59404D" xlink:to="lab_colb_LandAndAcquisitionMember_D7334B043536477916645B4F0A59404D" xlink:type="arc" />
    <link:label id="lab_colb_ResidentialConstructionMember_7FF7043AFCAE8472A4115B4F0A59373B_terseLabel_en-US" xlink:label="lab_colb_ResidentialConstructionMember_7FF7043AFCAE8472A4115B4F0A59373B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate construction: One-to-four family residential: Residential construction [Member]</link:label>
    <link:label id="lab_colb_ResidentialConstructionMember_7FF7043AFCAE8472A4115B4F0A59373B_label_en-US" xlink:label="lab_colb_ResidentialConstructionMember_7FF7043AFCAE8472A4115B4F0A59373B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Construction [Member]</link:label>
    <link:label id="lab_colb_ResidentialConstructionMember_7FF7043AFCAE8472A4115B4F0A59373B_documentation_en-US" xlink:label="lab_colb_ResidentialConstructionMember_7FF7043AFCAE8472A4115B4F0A59373B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Residential Construction [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ResidentialConstructionMember" xlink:label="loc_colb_ResidentialConstructionMember_7FF7043AFCAE8472A4115B4F0A59373B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ResidentialConstructionMember_7FF7043AFCAE8472A4115B4F0A59373B" xlink:to="lab_colb_ResidentialConstructionMember_7FF7043AFCAE8472A4115B4F0A59373B" xlink:type="arc" />
    <link:label id="lab_colb_IncomePropertyMultifamilyMember_81CA5C10528B46F91CFF5B4F0A59E28B_terseLabel_en-US" xlink:label="lab_colb_IncomePropertyMultifamilyMember_81CA5C10528B46F91CFF5B4F0A59E28B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate: Commercial and multifamiIy residential: Income property [Member]</link:label>
    <link:label id="lab_colb_IncomePropertyMultifamilyMember_81CA5C10528B46F91CFF5B4F0A59E28B_label_en-US" xlink:label="lab_colb_IncomePropertyMultifamilyMember_81CA5C10528B46F91CFF5B4F0A59E28B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Property Multifamily [Member]</link:label>
    <link:label id="lab_colb_IncomePropertyMultifamilyMember_81CA5C10528B46F91CFF5B4F0A59E28B_documentation_en-US" xlink:label="lab_colb_IncomePropertyMultifamilyMember_81CA5C10528B46F91CFF5B4F0A59E28B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income Property Multifamily [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_IncomePropertyMultifamilyMember" xlink:label="loc_colb_IncomePropertyMultifamilyMember_81CA5C10528B46F91CFF5B4F0A59E28B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_IncomePropertyMultifamilyMember_81CA5C10528B46F91CFF5B4F0A59E28B" xlink:to="lab_colb_IncomePropertyMultifamilyMember_81CA5C10528B46F91CFF5B4F0A59E28B" xlink:type="arc" />
    <link:label id="lab_colb_OwnerOccupiedConstructionMember_64DF8CE348252E62F5885B4F0A5921B0_terseLabel_en-US" xlink:label="lab_colb_OwnerOccupiedConstructionMember_64DF8CE348252E62F5885B4F0A5921B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate construction: Commercial and multifamily residential: Owner occupied [Member]</link:label>
    <link:label id="lab_colb_OwnerOccupiedConstructionMember_64DF8CE348252E62F5885B4F0A5921B0_label_en-US" xlink:label="lab_colb_OwnerOccupiedConstructionMember_64DF8CE348252E62F5885B4F0A5921B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Owner Occupied Construction [Member]</link:label>
    <link:label id="lab_colb_OwnerOccupiedConstructionMember_64DF8CE348252E62F5885B4F0A5921B0_documentation_en-US" xlink:label="lab_colb_OwnerOccupiedConstructionMember_64DF8CE348252E62F5885B4F0A5921B0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Owner Occupied Construction [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OwnerOccupiedConstructionMember" xlink:label="loc_colb_OwnerOccupiedConstructionMember_64DF8CE348252E62F5885B4F0A5921B0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OwnerOccupiedConstructionMember_64DF8CE348252E62F5885B4F0A5921B0" xlink:to="lab_colb_OwnerOccupiedConstructionMember_64DF8CE348252E62F5885B4F0A5921B0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_4692EF6C70628E1658BB5B4F0A591788_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_4692EF6C70628E1658BB5B4F0A591788" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, Past Due [Line Items]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_4692EF6C70628E1658BB5B4F0A591788_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_4692EF6C70628E1658BB5B4F0A591788" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, Past Due [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_4692EF6C70628E1658BB5B4F0A591788" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_4692EF6C70628E1658BB5B4F0A591788" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_4692EF6C70628E1658BB5B4F0A591788" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentCurrent_55822A7670D3CFBFCC2F5B4F0A598934_verboseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentCurrent_55822A7670D3CFBFCC2F5B4F0A598934" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Current Loans</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentCurrent_55822A7670D3CFBFCC2F5B4F0A598934_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentCurrent_55822A7670D3CFBFCC2F5B4F0A598934" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentCurrent" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_55822A7670D3CFBFCC2F5B4F0A598934" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_55822A7670D3CFBFCC2F5B4F0A598934" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentCurrent_55822A7670D3CFBFCC2F5B4F0A598934" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDue_2629AD1EA1F1AE6F95305B4F0A59B059_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDue_2629AD1EA1F1AE6F95305B4F0A59B059" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Past Due</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDue_2629AD1EA1F1AE6F95305B4F0A59B059_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDue_2629AD1EA1F1AE6F95305B4F0A59B059" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, Past Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDue" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDue_2629AD1EA1F1AE6F95305B4F0A59B059" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDue_2629AD1EA1F1AE6F95305B4F0A59B059" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDue_2629AD1EA1F1AE6F95305B4F0A59B059" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_6485BFC35FC91A7A4C7E5B4F0A59608A_verboseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_6485BFC35FC91A7A4C7E5B4F0A59608A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Nonaccrual Loans</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_6485BFC35FC91A7A4C7E5B4F0A59608A_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_6485BFC35FC91A7A4C7E5B4F0A59608A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, Nonaccrual Status</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_6485BFC35FC91A7A4C7E5B4F0A59608A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_6485BFC35FC91A7A4C7E5B4F0A59608A" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_6485BFC35FC91A7A4C7E5B4F0A59608A" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableNet_D05813BA2ACA55C72ED65B4F0A59443B_totalLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableNet_D05813BA2ACA55C72ED65B4F0A59443B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Loans Receivable, Net</link:label>
    <link:label id="lab_us-gaap_LoansReceivableNet_D05813BA2ACA55C72ED65B4F0A59443B_label_en-US" xlink:label="lab_us-gaap_LoansReceivableNet_D05813BA2ACA55C72ED65B4F0A59443B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableNet" xlink:label="loc_us-gaap_LoansReceivableNet_D05813BA2ACA55C72ED65B4F0A59443B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableNet_D05813BA2ACA55C72ED65B4F0A59443B" xlink:to="lab_us-gaap_LoansReceivableNet_D05813BA2ACA55C72ED65B4F0A59443B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepositsAbstract_1A5B2114B91BB95DF8C85B4F096F749E_label_en-US" xlink:label="lab_us-gaap_DepositsAbstract_1A5B2114B91BB95DF8C85B4F096F749E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposits [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositsAbstract" xlink:label="loc_us-gaap_DepositsAbstract_1A5B2114B91BB95DF8C85B4F096F749E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositsAbstract_1A5B2114B91BB95DF8C85B4F096F749E" xlink:to="lab_us-gaap_DepositsAbstract_1A5B2114B91BB95DF8C85B4F096F749E" xlink:type="arc" />
    <link:label id="lab_colb_ScheduleOfDepositsTableTextBlock_E8D047EFFF9D1B30E7605B4F096FC5F6_terseLabel_en-US" xlink:label="lab_colb_ScheduleOfDepositsTableTextBlock_E8D047EFFF9D1B30E7605B4F096FC5F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Deposits</link:label>
    <link:label id="lab_colb_ScheduleOfDepositsTableTextBlock_E8D047EFFF9D1B30E7605B4F096FC5F6_label_en-US" xlink:label="lab_colb_ScheduleOfDepositsTableTextBlock_E8D047EFFF9D1B30E7605B4F096FC5F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Deposits [Table Text Block]</link:label>
    <link:label id="lab_colb_ScheduleOfDepositsTableTextBlock_E8D047EFFF9D1B30E7605B4F096FC5F6_documentation_en-US" xlink:label="lab_colb_ScheduleOfDepositsTableTextBlock_E8D047EFFF9D1B30E7605B4F096FC5F6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule Of Deposits [Table Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ScheduleOfDepositsTableTextBlock" xlink:label="loc_colb_ScheduleOfDepositsTableTextBlock_E8D047EFFF9D1B30E7605B4F096FC5F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ScheduleOfDepositsTableTextBlock_E8D047EFFF9D1B30E7605B4F096FC5F6" xlink:to="lab_colb_ScheduleOfDepositsTableTextBlock_E8D047EFFF9D1B30E7605B4F096FC5F6" xlink:type="arc" />
    <link:label id="lab_colb_ScheduleOfTimeDepositsMaturityTableTextBlock_8CBDE57646799CD2C3DE5B4F096F16D9_terseLabel_en-US" xlink:label="lab_colb_ScheduleOfTimeDepositsMaturityTableTextBlock_8CBDE57646799CD2C3DE5B4F096F16D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule Of Time Deposits Maturity</link:label>
    <link:label id="lab_colb_ScheduleOfTimeDepositsMaturityTableTextBlock_8CBDE57646799CD2C3DE5B4F096F16D9_label_en-US" xlink:label="lab_colb_ScheduleOfTimeDepositsMaturityTableTextBlock_8CBDE57646799CD2C3DE5B4F096F16D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule Of Time Deposits Maturity [Table Text Block]</link:label>
    <link:label id="lab_colb_ScheduleOfTimeDepositsMaturityTableTextBlock_8CBDE57646799CD2C3DE5B4F096F16D9_documentation_en-US" xlink:label="lab_colb_ScheduleOfTimeDepositsMaturityTableTextBlock_8CBDE57646799CD2C3DE5B4F096F16D9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule Of Time Deposits Maturity [Table Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ScheduleOfTimeDepositsMaturityTableTextBlock" xlink:label="loc_colb_ScheduleOfTimeDepositsMaturityTableTextBlock_8CBDE57646799CD2C3DE5B4F096F16D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ScheduleOfTimeDepositsMaturityTableTextBlock_8CBDE57646799CD2C3DE5B4F096F16D9" xlink:to="lab_colb_ScheduleOfTimeDepositsMaturityTableTextBlock_8CBDE57646799CD2C3DE5B4F096F16D9" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventsAbstract_9724361EAE73AB23163207591782997B_label_en-US" xlink:label="lab_us-gaap_SubsequentEventsAbstract_9724361EAE73AB23163207591782997B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Events [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_9724361EAE73AB23163207591782997B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsAbstract_9724361EAE73AB23163207591782997B" xlink:to="lab_us-gaap_SubsequentEventsAbstract_9724361EAE73AB23163207591782997B" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventsTextBlock_34BA74AB803B149C04B60759178221EB_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventsTextBlock_34BA74AB803B149C04B60759178221EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Events [Text Block]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventsTextBlock_34BA74AB803B149C04B60759178221EB_label_en-US" xlink:label="lab_us-gaap_SubsequentEventsTextBlock_34BA74AB803B149C04B60759178221EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Events [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="loc_us-gaap_SubsequentEventsTextBlock_34BA74AB803B149C04B60759178221EB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsTextBlock_34BA74AB803B149C04B60759178221EB" xlink:to="lab_us-gaap_SubsequentEventsTextBlock_34BA74AB803B149C04B60759178221EB" xlink:type="arc" />
    <link:label id="lab_srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_7250FA8889866E1F70B607590F6DDFAE_label_en-US" xlink:label="lab_srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_7250FA8889866E1F70B607590F6DDFAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Financial Information Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:label="loc_srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_7250FA8889866E1F70B607590F6DDFAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_7250FA8889866E1F70B607590F6DDFAE" xlink:to="lab_srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_7250FA8889866E1F70B607590F6DDFAE" xlink:type="arc" />
    <link:label id="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_A6B1F850A48B7543D40D07590F6DD9FC_terseLabel_en-US" xlink:label="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_A6B1F850A48B7543D40D07590F6DD9FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Parent Company Financial Information</link:label>
    <link:label id="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_A6B1F850A48B7543D40D07590F6DD9FC_label_en-US" xlink:label="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_A6B1F850A48B7543D40D07590F6DD9FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Financial Information of Parent Company Only Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" xlink:label="loc_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_A6B1F850A48B7543D40D07590F6DD9FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_A6B1F850A48B7543D40D07590F6DD9FC" xlink:to="lab_us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_A6B1F850A48B7543D40D07590F6DD9FC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_3650D41112FF610008FAA54E6E12D20A_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_3650D41112FF610008FAA54E6E12D20A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Due within one year, Amortized Cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_3650D41112FF610008FAA54E6E12D20A_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_3650D41112FF610008FAA54E6E12D20A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_3650D41112FF610008FAA54E6E12D20A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_3650D41112FF610008FAA54E6E12D20A" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_3650D41112FF610008FAA54E6E12D20A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_FFECB5C8A11B4B41762BA54E6E12AB37_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_FFECB5C8A11B4B41762BA54E6E12AB37" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Due after one year through five years, Amortized Cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_FFECB5C8A11B4B41762BA54E6E12AB37_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_FFECB5C8A11B4B41762BA54E6E12AB37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_FFECB5C8A11B4B41762BA54E6E12AB37" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_FFECB5C8A11B4B41762BA54E6E12AB37" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_FFECB5C8A11B4B41762BA54E6E12AB37" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_CF0B3CE62070730779DFA54E6E12B6C7_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_CF0B3CE62070730779DFA54E6E12B6C7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Due after five years through ten years, Amortized Cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_CF0B3CE62070730779DFA54E6E12B6C7_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_CF0B3CE62070730779DFA54E6E12B6C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_CF0B3CE62070730779DFA54E6E12B6C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_CF0B3CE62070730779DFA54E6E12B6C7" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_CF0B3CE62070730779DFA54E6E12B6C7" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_659F46F9E93ED5F6A3B5A54E6E1246D3_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_659F46F9E93ED5F6A3B5A54E6E1246D3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Due after ten years, Amortized Cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_659F46F9E93ED5F6A3B5A54E6E1246D3_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_659F46F9E93ED5F6A3B5A54E6E1246D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_659F46F9E93ED5F6A3B5A54E6E1246D3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_659F46F9E93ED5F6A3B5A54E6E1246D3" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_659F46F9E93ED5F6A3B5A54E6E1246D3" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_5DD6254F7E9D442578DAA54E6E122DBC_totalLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_5DD6254F7E9D442578DAA54E6E122DBC" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total investment securities available-for-sale, Amortized Cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_5DD6254F7E9D442578DAA54E6E122DBC_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_5DD6254F7E9D442578DAA54E6E122DBC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_5DD6254F7E9D442578DAA54E6E122DBC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_5DD6254F7E9D442578DAA54E6E122DBC" xlink:to="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_5DD6254F7E9D442578DAA54E6E122DBC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_1C6E0927BE80D4639215A54E6E1248DA_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_1C6E0927BE80D4639215A54E6E1248DA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Due within one year, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_1C6E0927BE80D4639215A54E6E1248DA_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_1C6E0927BE80D4639215A54E6E1248DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_1C6E0927BE80D4639215A54E6E1248DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_1C6E0927BE80D4639215A54E6E1248DA" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_1C6E0927BE80D4639215A54E6E1248DA" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_EAD6A4304A2DBB09AC68A54E6E124F1F_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_EAD6A4304A2DBB09AC68A54E6E124F1F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Due after one year through five years, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_EAD6A4304A2DBB09AC68A54E6E124F1F_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_EAD6A4304A2DBB09AC68A54E6E124F1F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_EAD6A4304A2DBB09AC68A54E6E124F1F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_EAD6A4304A2DBB09AC68A54E6E124F1F" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_EAD6A4304A2DBB09AC68A54E6E124F1F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_03EB34C0EF19773F9EF7A54E6E12681F_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_03EB34C0EF19773F9EF7A54E6E12681F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Due after five years through ten years, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_03EB34C0EF19773F9EF7A54E6E12681F_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_03EB34C0EF19773F9EF7A54E6E12681F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_03EB34C0EF19773F9EF7A54E6E12681F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_03EB34C0EF19773F9EF7A54E6E12681F" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_03EB34C0EF19773F9EF7A54E6E12681F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_7EBA51F373AF929CFE61A54E6E12F339_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_7EBA51F373AF929CFE61A54E6E12F339" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Due after ten years, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_7EBA51F373AF929CFE61A54E6E12F339_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_7EBA51F373AF929CFE61A54E6E12F339" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_7EBA51F373AF929CFE61A54E6E12F339" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_7EBA51F373AF929CFE61A54E6E12F339" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_7EBA51F373AF929CFE61A54E6E12F339" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0B15CEDA01AFBAD89F83A54E6E1282F7_totalLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0B15CEDA01AFBAD89F83A54E6E1282F7" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total investment securities available-for-sale, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0B15CEDA01AFBAD89F83A54E6E1282F7_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0B15CEDA01AFBAD89F83A54E6E1282F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0B15CEDA01AFBAD89F83A54E6E1282F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0B15CEDA01AFBAD89F83A54E6E1282F7" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_0B15CEDA01AFBAD89F83A54E6E1282F7" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_B914799E1FBC5D9EE561075915AEB314_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_B914799E1FBC5D9EE561075915AEB314" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premises and Equipment</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_B914799E1FBC5D9EE561075915AEB314_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_B914799E1FBC5D9EE561075915AEB314" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_B914799E1FBC5D9EE561075915AEB314" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_B914799E1FBC5D9EE561075915AEB314" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_B914799E1FBC5D9EE561075915AEB314" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingenciesTable_EF2F9EE08D9F29A3331F06BF56F2D959_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesTable_EF2F9EE08D9F29A3331F06BF56F2D959" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss Contingencies [Table]</link:label>
    <link:label id="lab_us-gaap_LossContingenciesTable_EF2F9EE08D9F29A3331F06BF56F2D959_label_en-US" xlink:label="lab_us-gaap_LossContingenciesTable_EF2F9EE08D9F29A3331F06BF56F2D959" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingencies [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="loc_us-gaap_LossContingenciesTable_EF2F9EE08D9F29A3331F06BF56F2D959" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingenciesTable_EF2F9EE08D9F29A3331F06BF56F2D959" xlink:to="lab_us-gaap_LossContingenciesTable_EF2F9EE08D9F29A3331F06BF56F2D959" xlink:type="arc" />
    <link:label id="lab_colb_StateofsaleleasebackactivityAxis_0733573A04142FB35F5006BF56F226B5_terseLabel_en-US" xlink:label="lab_colb_StateofsaleleasebackactivityAxis_0733573A04142FB35F5006BF56F226B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">State of sale-leaseback activity [Axis]</link:label>
    <link:label id="lab_colb_StateofsaleleasebackactivityAxis_0733573A04142FB35F5006BF56F226B5_label_en-US" xlink:label="lab_colb_StateofsaleleasebackactivityAxis_0733573A04142FB35F5006BF56F226B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">State of sale-leaseback activity [Axis]</link:label>
    <link:label id="lab_colb_StateofsaleleasebackactivityAxis_0733573A04142FB35F5006BF56F226B5_documentation_en-US" xlink:label="lab_colb_StateofsaleleasebackactivityAxis_0733573A04142FB35F5006BF56F226B5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">State of sale-leaseback activity [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_StateofsaleleasebackactivityAxis" xlink:label="loc_colb_StateofsaleleasebackactivityAxis_0733573A04142FB35F5006BF56F226B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_StateofsaleleasebackactivityAxis_0733573A04142FB35F5006BF56F226B5" xlink:to="lab_colb_StateofsaleleasebackactivityAxis_0733573A04142FB35F5006BF56F226B5" xlink:type="arc" />
    <link:label id="lab_colb_StateofsaleleasebackactivityDomain_4EC62663FED9196C9B1206BF56F24871_terseLabel_en-US" xlink:label="lab_colb_StateofsaleleasebackactivityDomain_4EC62663FED9196C9B1206BF56F24871" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">State of sale-leaseback activity [Domain]</link:label>
    <link:label id="lab_colb_StateofsaleleasebackactivityDomain_4EC62663FED9196C9B1206BF56F24871_label_en-US" xlink:label="lab_colb_StateofsaleleasebackactivityDomain_4EC62663FED9196C9B1206BF56F24871" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">State of sale-leaseback activity [Domain]</link:label>
    <link:label id="lab_colb_StateofsaleleasebackactivityDomain_4EC62663FED9196C9B1206BF56F24871_documentation_en-US" xlink:label="lab_colb_StateofsaleleasebackactivityDomain_4EC62663FED9196C9B1206BF56F24871" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Domain] for State of sale-leaseback activity [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_StateofsaleleasebackactivityDomain" xlink:label="loc_colb_StateofsaleleasebackactivityDomain_4EC62663FED9196C9B1206BF56F24871" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_StateofsaleleasebackactivityDomain_4EC62663FED9196C9B1206BF56F24871" xlink:to="lab_colb_StateofsaleleasebackactivityDomain_4EC62663FED9196C9B1206BF56F24871" xlink:type="arc" />
    <link:label id="lab_stpr_ID_92AAE505A95CAAC580DA06BF56F2183E_terseLabel_en-US" xlink:label="lab_stpr_ID_92AAE505A95CAAC580DA06BF56F2183E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">IDAHO</link:label>
    <link:label id="lab_stpr_ID_92AAE505A95CAAC580DA06BF56F2183E_label_en-US" xlink:label="lab_stpr_ID_92AAE505A95CAAC580DA06BF56F2183E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">IDAHO</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_ID" xlink:label="loc_stpr_ID_92AAE505A95CAAC580DA06BF56F2183E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_stpr_ID_92AAE505A95CAAC580DA06BF56F2183E" xlink:to="lab_stpr_ID_92AAE505A95CAAC580DA06BF56F2183E" xlink:type="arc" />
    <link:label id="lab_stpr_WA_01C05A4F8D889712524E06BF56F2DBA7_terseLabel_en-US" xlink:label="lab_stpr_WA_01C05A4F8D889712524E06BF56F2DBA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">WASHINGTON</link:label>
    <link:label id="lab_stpr_WA_01C05A4F8D889712524E06BF56F2DBA7_label_en-US" xlink:label="lab_stpr_WA_01C05A4F8D889712524E06BF56F2DBA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">WASHINGTON</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_WA" xlink:label="loc_stpr_WA_01C05A4F8D889712524E06BF56F2DBA7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_stpr_WA_01C05A4F8D889712524E06BF56F2DBA7" xlink:to="lab_stpr_WA_01C05A4F8D889712524E06BF56F2DBA7" xlink:type="arc" />
    <link:label id="lab_us-gaap_RestructuringCostAndReserveAxis_FFC50DB5B7ECD9C3D0ED06BF56F2DFAE_terseLabel_en-US" xlink:label="lab_us-gaap_RestructuringCostAndReserveAxis_FFC50DB5B7ECD9C3D0ED06BF56F2DFAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restructuring Type [Axis]</link:label>
    <link:label id="lab_us-gaap_RestructuringCostAndReserveAxis_FFC50DB5B7ECD9C3D0ED06BF56F2DFAE_label_en-US" xlink:label="lab_us-gaap_RestructuringCostAndReserveAxis_FFC50DB5B7ECD9C3D0ED06BF56F2DFAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restructuring Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_FFC50DB5B7ECD9C3D0ED06BF56F2DFAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_FFC50DB5B7ECD9C3D0ED06BF56F2DFAE" xlink:to="lab_us-gaap_RestructuringCostAndReserveAxis_FFC50DB5B7ECD9C3D0ED06BF56F2DFAE" xlink:type="arc" />
    <link:label id="lab_us-gaap_TypeOfRestructuringDomain_E73CA28DE4CDBDC7FE1206BF56F2FC10_terseLabel_en-US" xlink:label="lab_us-gaap_TypeOfRestructuringDomain_E73CA28DE4CDBDC7FE1206BF56F2FC10" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Type of Restructuring [Domain]</link:label>
    <link:label id="lab_us-gaap_TypeOfRestructuringDomain_E73CA28DE4CDBDC7FE1206BF56F2FC10_label_en-US" xlink:label="lab_us-gaap_TypeOfRestructuringDomain_E73CA28DE4CDBDC7FE1206BF56F2FC10" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Type of Restructuring [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_E73CA28DE4CDBDC7FE1206BF56F2FC10" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_E73CA28DE4CDBDC7FE1206BF56F2FC10" xlink:to="lab_us-gaap_TypeOfRestructuringDomain_E73CA28DE4CDBDC7FE1206BF56F2FC10" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsToExtendCreditMember_E2C55CD2F78C948CACCF06BF56F23F53_label_en-US" xlink:label="lab_us-gaap_CommitmentsToExtendCreditMember_E2C55CD2F78C948CACCF06BF56F23F53" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments to Extend Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsToExtendCreditMember" xlink:label="loc_us-gaap_CommitmentsToExtendCreditMember_E2C55CD2F78C948CACCF06BF56F23F53" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsToExtendCreditMember_E2C55CD2F78C948CACCF06BF56F23F53" xlink:to="lab_us-gaap_CommitmentsToExtendCreditMember_E2C55CD2F78C948CACCF06BF56F23F53" xlink:type="arc" />
    <link:label id="lab_us-gaap_StandbyLettersOfCreditMember_6A3382AE219E900BCE6606BF56F27EE6_label_en-US" xlink:label="lab_us-gaap_StandbyLettersOfCreditMember_6A3382AE219E900BCE6606BF56F27EE6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Standby Letters of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StandbyLettersOfCreditMember" xlink:label="loc_us-gaap_StandbyLettersOfCreditMember_6A3382AE219E900BCE6606BF56F27EE6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StandbyLettersOfCreditMember_6A3382AE219E900BCE6606BF56F27EE6" xlink:to="lab_us-gaap_StandbyLettersOfCreditMember_6A3382AE219E900BCE6606BF56F27EE6" xlink:type="arc" />
    <link:label id="lab_colb_CommercialLetterofCreditandotheroffbalancesheetliabilitiesMember_32635CF31C72B0A0792706BF56F2585D_label_en-US" xlink:label="lab_colb_CommercialLetterofCreditandotheroffbalancesheetliabilitiesMember_32635CF31C72B0A0792706BF56F2585D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial Letter of Credit and other off-balance sheet liabilities [Member]</link:label>
    <link:label id="lab_colb_CommercialLetterofCreditandotheroffbalancesheetliabilitiesMember_32635CF31C72B0A0792706BF56F2585D_documentation_en-US" xlink:label="lab_colb_CommercialLetterofCreditandotheroffbalancesheetliabilitiesMember_32635CF31C72B0A0792706BF56F2585D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Commercial Letter of Credit and other off-balance sheet liabilities[Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommercialLetterofCreditandotheroffbalancesheetliabilitiesMember" xlink:label="loc_colb_CommercialLetterofCreditandotheroffbalancesheetliabilitiesMember_32635CF31C72B0A0792706BF56F2585D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommercialLetterofCreditandotheroffbalancesheetliabilitiesMember_32635CF31C72B0A0792706BF56F2585D" xlink:to="lab_colb_CommercialLetterofCreditandotheroffbalancesheetliabilitiesMember_32635CF31C72B0A0792706BF56F2585D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingenciesLineItems_9250B42CF4C0993BA75706BF56F2FD54_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesLineItems_9250B42CF4C0993BA75706BF56F2FD54" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss Contingencies [Line Items]</link:label>
    <link:label id="lab_us-gaap_LossContingenciesLineItems_9250B42CF4C0993BA75706BF56F2FD54_label_en-US" xlink:label="lab_us-gaap_LossContingenciesLineItems_9250B42CF4C0993BA75706BF56F2FD54" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingencies [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="loc_us-gaap_LossContingenciesLineItems_9250B42CF4C0993BA75706BF56F2FD54" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingenciesLineItems_9250B42CF4C0993BA75706BF56F2FD54" xlink:to="lab_us-gaap_LossContingenciesLineItems_9250B42CF4C0993BA75706BF56F2FD54" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_B8B2AB38C212BAB1135906BF56F2F1CE_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_B8B2AB38C212BAB1135906BF56F2F1CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum future rental payments:</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_B8B2AB38C212BAB1135906BF56F2F1CE_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_B8B2AB38C212BAB1135906BF56F2F1CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_B8B2AB38C212BAB1135906BF56F2F1CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_B8B2AB38C212BAB1135906BF56F2F1CE" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_B8B2AB38C212BAB1135906BF56F2F1CE" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_DB12622647AF8A3BFBF706BF56F2FA34_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_DB12622647AF8A3BFBF706BF56F2FA34" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2019</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_DB12622647AF8A3BFBF706BF56F2FA34_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_DB12622647AF8A3BFBF706BF56F2FA34" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments Due, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_DB12622647AF8A3BFBF706BF56F2FA34" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_DB12622647AF8A3BFBF706BF56F2FA34" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_DB12622647AF8A3BFBF706BF56F2FA34" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_63781ED1EED700AB999C06BF56F25661_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_63781ED1EED700AB999C06BF56F25661" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_63781ED1EED700AB999C06BF56F25661_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_63781ED1EED700AB999C06BF56F25661" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Two Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_63781ED1EED700AB999C06BF56F25661" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_63781ED1EED700AB999C06BF56F25661" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_63781ED1EED700AB999C06BF56F25661" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E8F850CBEF1A8B04260F06BF56F2560F_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E8F850CBEF1A8B04260F06BF56F2560F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E8F850CBEF1A8B04260F06BF56F2560F_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E8F850CBEF1A8B04260F06BF56F2560F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Three Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E8F850CBEF1A8B04260F06BF56F2560F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E8F850CBEF1A8B04260F06BF56F2560F" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E8F850CBEF1A8B04260F06BF56F2560F" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_E2FCD7F1F0E2C722CE5206BF56F21B22_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_E2FCD7F1F0E2C722CE5206BF56F21B22" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_E2FCD7F1F0E2C722CE5206BF56F21B22_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_E2FCD7F1F0E2C722CE5206BF56F21B22" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Four Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_E2FCD7F1F0E2C722CE5206BF56F21B22" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_E2FCD7F1F0E2C722CE5206BF56F21B22" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_E2FCD7F1F0E2C722CE5206BF56F21B22" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_7C58C46CD380304A0CB306BF56F28C7C_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_7C58C46CD380304A0CB306BF56F28C7C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_7C58C46CD380304A0CB306BF56F28C7C_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_7C58C46CD380304A0CB306BF56F28C7C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Five Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_7C58C46CD380304A0CB306BF56F28C7C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_7C58C46CD380304A0CB306BF56F28C7C" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_7C58C46CD380304A0CB306BF56F28C7C" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5CD5CE72AAF0E695D5DC06BF56F26204_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5CD5CE72AAF0E695D5DC06BF56F26204" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Thereafter</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5CD5CE72AAF0E695D5DC06BF56F26204_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5CD5CE72AAF0E695D5DC06BF56F26204" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due Thereafter</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5CD5CE72AAF0E695D5DC06BF56F26204" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5CD5CE72AAF0E695D5DC06BF56F26204" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_5CD5CE72AAF0E695D5DC06BF56F26204" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_8514987C89B15E11B9CB06BF56F2A6D1_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_8514987C89B15E11B9CB06BF56F2A6D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total minimum payments</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_8514987C89B15E11B9CB06BF56F2A6D1_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_8514987C89B15E11B9CB06BF56F2A6D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments Due</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_8514987C89B15E11B9CB06BF56F2A6D1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_8514987C89B15E11B9CB06BF56F2A6D1" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_8514987C89B15E11B9CB06BF56F2A6D1" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_4CC628C354FEEADFDEDD06BF56F2BF74_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_4CC628C354FEEADFDEDD06BF56F2BF74" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Leases, Rent Expense, Sublease Rentals</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_4CC628C354FEEADFDEDD06BF56F2BF74_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_4CC628C354FEEADFDEDD06BF56F2BF74" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Rent Expense, Sublease Rentals</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesRentExpenseSubleaseRentals1" xlink:label="loc_us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_4CC628C354FEEADFDEDD06BF56F2BF74" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_4CC628C354FEEADFDEDD06BF56F2BF74" xlink:to="lab_us-gaap_OperatingLeasesRentExpenseSubleaseRentals1_4CC628C354FEEADFDEDD06BF56F2BF74" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesRentExpenseNet_8E82C95798B77CDCDBEF06BF56F27296_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesRentExpenseNet_8E82C95798B77CDCDBEF06BF56F27296" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Leases, Rent Expense, Net</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesRentExpenseNet_8E82C95798B77CDCDBEF06BF56F27296_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesRentExpenseNet_8E82C95798B77CDCDBEF06BF56F27296" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Rent Expense, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeasesRentExpenseNet" xlink:label="loc_us-gaap_OperatingLeasesRentExpenseNet_8E82C95798B77CDCDBEF06BF56F27296" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesRentExpenseNet_8E82C95798B77CDCDBEF06BF56F27296" xlink:to="lab_us-gaap_OperatingLeasesRentExpenseNet_8E82C95798B77CDCDBEF06BF56F27296" xlink:type="arc" />
    <link:label id="lab_us-gaap_SaleLeasebackTransactionDate_1F76C083C4EF32C5D59E06BF56F2FDAE_terseLabel_en-US" xlink:label="lab_us-gaap_SaleLeasebackTransactionDate_1F76C083C4EF32C5D59E06BF56F2FDAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale Leaseback Transaction, Date</link:label>
    <link:label id="lab_us-gaap_SaleLeasebackTransactionDate_1F76C083C4EF32C5D59E06BF56F2FDAE_label_en-US" xlink:label="lab_us-gaap_SaleLeasebackTransactionDate_1F76C083C4EF32C5D59E06BF56F2FDAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale Leaseback Transaction, Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SaleLeasebackTransactionDate" xlink:label="loc_us-gaap_SaleLeasebackTransactionDate_1F76C083C4EF32C5D59E06BF56F2FDAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SaleLeasebackTransactionDate_1F76C083C4EF32C5D59E06BF56F2FDAE" xlink:to="lab_us-gaap_SaleLeasebackTransactionDate_1F76C083C4EF32C5D59E06BF56F2FDAE" xlink:type="arc" />
    <link:label id="lab_us-gaap_SaleLeasebackTransactionMonthlyRentalPayments_B8FAF7B8EA7AF9407FDA06BF56F255BD_terseLabel_en-US" xlink:label="lab_us-gaap_SaleLeasebackTransactionMonthlyRentalPayments_B8FAF7B8EA7AF9407FDA06BF56F255BD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale Leaseback Transaction, Monthly Rental Payments</link:label>
    <link:label id="lab_us-gaap_SaleLeasebackTransactionMonthlyRentalPayments_B8FAF7B8EA7AF9407FDA06BF56F255BD_label_en-US" xlink:label="lab_us-gaap_SaleLeasebackTransactionMonthlyRentalPayments_B8FAF7B8EA7AF9407FDA06BF56F255BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale Leaseback Transaction, Monthly Rental Payments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SaleLeasebackTransactionMonthlyRentalPayments" xlink:label="loc_us-gaap_SaleLeasebackTransactionMonthlyRentalPayments_B8FAF7B8EA7AF9407FDA06BF56F255BD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SaleLeasebackTransactionMonthlyRentalPayments_B8FAF7B8EA7AF9407FDA06BF56F255BD" xlink:to="lab_us-gaap_SaleLeasebackTransactionMonthlyRentalPayments_B8FAF7B8EA7AF9407FDA06BF56F255BD" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_73B37C6133EE852E05C106BF56F23166_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_73B37C6133EE852E05C106BF56F23166" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_73B37C6133EE852E05C106BF56F23166_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_73B37C6133EE852E05C106BF56F23166" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability" xlink:label="loc_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_73B37C6133EE852E05C106BF56F23166" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_73B37C6133EE852E05C106BF56F23166" xlink:to="lab_us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability_73B37C6133EE852E05C106BF56F23166" xlink:type="arc" />
    <link:label id="lab_us-gaap_SaleLeasebackTransactionDeferredGainGross_EE2BFB0F170F4D30676106BF56F2033C_terseLabel_en-US" xlink:label="lab_us-gaap_SaleLeasebackTransactionDeferredGainGross_EE2BFB0F170F4D30676106BF56F2033C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale Leaseback Transaction, Deferred Gain, Gross</link:label>
    <link:label id="lab_us-gaap_SaleLeasebackTransactionDeferredGainGross_EE2BFB0F170F4D30676106BF56F2033C_label_en-US" xlink:label="lab_us-gaap_SaleLeasebackTransactionDeferredGainGross_EE2BFB0F170F4D30676106BF56F2033C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale Leaseback Transaction, Deferred Gain, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SaleLeasebackTransactionDeferredGainGross" xlink:label="loc_us-gaap_SaleLeasebackTransactionDeferredGainGross_EE2BFB0F170F4D30676106BF56F2033C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SaleLeasebackTransactionDeferredGainGross_EE2BFB0F170F4D30676106BF56F2033C" xlink:to="lab_us-gaap_SaleLeasebackTransactionDeferredGainGross_EE2BFB0F170F4D30676106BF56F2033C" xlink:type="arc" />
    <link:label id="lab_us-gaap_SaleLeasebackTransactionDeferredGainNet_E0F2B5BD0C3036B2173206BF56F24EE1_terseLabel_en-US" xlink:label="lab_us-gaap_SaleLeasebackTransactionDeferredGainNet_E0F2B5BD0C3036B2173206BF56F24EE1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sale Leaseback Transaction, Deferred Gain, Net</link:label>
    <link:label id="lab_us-gaap_SaleLeasebackTransactionDeferredGainNet_E0F2B5BD0C3036B2173206BF56F24EE1_label_en-US" xlink:label="lab_us-gaap_SaleLeasebackTransactionDeferredGainNet_E0F2B5BD0C3036B2173206BF56F24EE1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sale Leaseback Transaction, Deferred Gain, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SaleLeasebackTransactionDeferredGainNet" xlink:label="loc_us-gaap_SaleLeasebackTransactionDeferredGainNet_E0F2B5BD0C3036B2173206BF56F24EE1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SaleLeasebackTransactionDeferredGainNet_E0F2B5BD0C3036B2173206BF56F24EE1" xlink:to="lab_us-gaap_SaleLeasebackTransactionDeferredGainNet_E0F2B5BD0C3036B2173206BF56F24EE1" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_43FD02C9FF45D9E60C5306BF56652606_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract_43FD02C9FF45D9E60C5306BF56652606" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_43FD02C9FF45D9E60C5306BF56652606" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_43FD02C9FF45D9E60C5306BF56652606" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract_43FD02C9FF45D9E60C5306BF56652606" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_E58F7B57AA70DACB2C9B06BF56653047_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_E58F7B57AA70DACB2C9B06BF56653047" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_E58F7B57AA70DACB2C9B06BF56653047_label_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_E58F7B57AA70DACB2C9B06BF56653047" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_E58F7B57AA70DACB2C9B06BF56653047" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_E58F7B57AA70DACB2C9B06BF56653047" xlink:to="lab_us-gaap_FairValueByBalanceSheetGroupingTable_E58F7B57AA70DACB2C9B06BF56653047" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancialInstrumentAxis_B754268AD9DEB1A1523906BF5666CFC8_verboseLabel_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis_B754268AD9DEB1A1523906BF5666CFC8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Option, Qualitative Disclosures Related to Election, by Eligible Item or Group [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis_B754268AD9DEB1A1523906BF5666CFC8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentAxis_B754268AD9DEB1A1523906BF5666CFC8" xlink:to="lab_us-gaap_FinancialInstrumentAxis_B754268AD9DEB1A1523906BF5666CFC8" xlink:type="arc" />
    <link:label id="lab_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_2F445F5C300865F0005406BF5666A750_terseLabel_en-US" xlink:label="lab_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_2F445F5C300865F0005406BF5666A750" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member]</link:label>
    <link:label id="lab_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_2F445F5C300865F0005406BF5666A750_label_en-US" xlink:label="lab_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_2F445F5C300865F0005406BF5666A750" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember" xlink:label="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_2F445F5C300865F0005406BF5666A750" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_2F445F5C300865F0005406BF5666A750" xlink:to="lab_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_2F445F5C300865F0005406BF5666A750" xlink:type="arc" />
    <link:label id="lab_us-gaap_MunicipalBondsMember_3C4EB821BD10ADDBF30E06BF566CEFD1_terseLabel_en-US" xlink:label="lab_us-gaap_MunicipalBondsMember_3C4EB821BD10ADDBF30E06BF566CEFD1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">State and Municipal Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MunicipalBondsMember" xlink:label="loc_us-gaap_MunicipalBondsMember_3C4EB821BD10ADDBF30E06BF566CEFD1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MunicipalBondsMember_3C4EB821BD10ADDBF30E06BF566CEFD1" xlink:to="lab_us-gaap_MunicipalBondsMember_3C4EB821BD10ADDBF30E06BF566CEFD1" xlink:type="arc" />
    <link:label id="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_094629A88BA02DFDDD3806BF566CDAEA_terseLabel_en-US" xlink:label="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_094629A88BA02DFDDD3806BF566CDAEA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. Government Agency [Member]</link:label>
    <link:label id="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_094629A88BA02DFDDD3806BF566CDAEA_label_en-US" xlink:label="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_094629A88BA02DFDDD3806BF566CDAEA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Government Agencies Debt Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_094629A88BA02DFDDD3806BF566CDAEA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_094629A88BA02DFDDD3806BF566CDAEA" xlink:to="lab_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_094629A88BA02DFDDD3806BF566CDAEA" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_E1DB6DE3CD9CE58C387406BF566CC928_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_E1DB6DE3CD9CE58C387406BF566CC928" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_E1DB6DE3CD9CE58C387406BF566CC928_label_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_E1DB6DE3CD9CE58C387406BF566CC928" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_E1DB6DE3CD9CE58C387406BF566CC928" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_E1DB6DE3CD9CE58C387406BF566CC928" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_E1DB6DE3CD9CE58C387406BF566CC928" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7E1A0CF9F17B974B6BEB06BF566CAA11_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7E1A0CF9F17B974B6BEB06BF566CAA11" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Measurements, Fair Value Hierarchy [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7E1A0CF9F17B974B6BEB06BF566CAA11_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7E1A0CF9F17B974B6BEB06BF566CAA11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7E1A0CF9F17B974B6BEB06BF566CAA11" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7E1A0CF9F17B974B6BEB06BF566CAA11" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7E1A0CF9F17B974B6BEB06BF566CAA11" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_8A15AF8474591FEFCE1306BF566D9337_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_8A15AF8474591FEFCE1306BF566D9337" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_8A15AF8474591FEFCE1306BF566D9337_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_8A15AF8474591FEFCE1306BF566D9337" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 1 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_8A15AF8474591FEFCE1306BF566D9337" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member_8A15AF8474591FEFCE1306BF566D9337" xlink:to="lab_us-gaap_FairValueInputsLevel1Member_8A15AF8474591FEFCE1306BF566D9337" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_37BECA7F849580FD3BDD06BF566DFE30_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_37BECA7F849580FD3BDD06BF566DFE30" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 2 [Member]</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_37BECA7F849580FD3BDD06BF566DFE30_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_37BECA7F849580FD3BDD06BF566DFE30" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 2 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_37BECA7F849580FD3BDD06BF566DFE30" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel2Member_37BECA7F849580FD3BDD06BF566DFE30" xlink:to="lab_us-gaap_FairValueInputsLevel2Member_37BECA7F849580FD3BDD06BF566DFE30" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_38AC2D3977D04B7BCDE506BF566D7C9C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_38AC2D3977D04B7BCDE506BF566D7C9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</link:label>
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_38AC2D3977D04B7BCDE506BF566D7C9C_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_38AC2D3977D04B7BCDE506BF566D7C9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Inputs, Level 3 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_38AC2D3977D04B7BCDE506BF566D7C9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member_38AC2D3977D04B7BCDE506BF566D7C9C" xlink:to="lab_us-gaap_FairValueInputsLevel3Member_38AC2D3977D04B7BCDE506BF566D7C9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByMeasurementFrequencyAxis_41B3A880E6B5357803FB06BF566DD572_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementFrequencyAxis_41B3A880E6B5357803FB06BF566DD572" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value by Measurement Frequency [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByMeasurementFrequencyAxis_41B3A880E6B5357803FB06BF566DD572_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementFrequencyAxis_41B3A880E6B5357803FB06BF566DD572" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Frequency [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_41B3A880E6B5357803FB06BF566DD572" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_41B3A880E6B5357803FB06BF566DD572" xlink:to="lab_us-gaap_FairValueByMeasurementFrequencyAxis_41B3A880E6B5357803FB06BF566DD572" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementFrequencyDomain_23BD74B67CFBABFDD09B06BF566D0F70_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain_23BD74B67CFBABFDD09B06BF566D0F70" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement Frequency [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementFrequencyDomain_23BD74B67CFBABFDD09B06BF566D0F70_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain_23BD74B67CFBABFDD09B06BF566D0F70" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement Frequency [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_23BD74B67CFBABFDD09B06BF566D0F70" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_23BD74B67CFBABFDD09B06BF566D0F70" xlink:to="lab_us-gaap_FairValueMeasurementFrequencyDomain_23BD74B67CFBABFDD09B06BF566D0F70" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementsRecurringMember_3F887890882DEC91DA8D06BF566EEAC0_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsRecurringMember_3F887890882DEC91DA8D06BF566EEAC0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Measurements, Recurring [Member]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsRecurringMember_3F887890882DEC91DA8D06BF566EEAC0_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsRecurringMember_3F887890882DEC91DA8D06BF566EEAC0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurements, Recurring [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_3F887890882DEC91DA8D06BF566EEAC0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsRecurringMember_3F887890882DEC91DA8D06BF566EEAC0" xlink:to="lab_us-gaap_FairValueMeasurementsRecurringMember_3F887890882DEC91DA8D06BF566EEAC0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_F8E35075234B0002A4A206BF566EB98C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_F8E35075234B0002A4A206BF566EB98C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_F8E35075234B0002A4A206BF566EB98C_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_F8E35075234B0002A4A206BF566EB98C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_F8E35075234B0002A4A206BF566EB98C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_F8E35075234B0002A4A206BF566EB98C" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_F8E35075234B0002A4A206BF566EB98C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersDescription_6C77F2A781A5D7A84F7106BF566E8E8F_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersDescription_6C77F2A781A5D7A84F7106BF566E8E8F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities, Level 2 to Level 1 Transfers, Description</link:label>
    <link:label id="lab_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersDescription_6C77F2A781A5D7A84F7106BF566E8E8F_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersDescription_6C77F2A781A5D7A84F7106BF566E8E8F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Liabilities, Level 2 to Level 1 Transfers, Description</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersDescription" xlink:label="loc_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersDescription_6C77F2A781A5D7A84F7106BF566E8E8F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersDescription_6C77F2A781A5D7A84F7106BF566E8E8F" xlink:to="lab_us-gaap_FairValueLiabilitiesLevel2ToLevel1TransfersDescription_6C77F2A781A5D7A84F7106BF566E8E8F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecurities_CD5FDB6018867BCF86C806BF566F24B1_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecurities_CD5FDB6018867BCF86C806BF566F24B1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securities available for sale</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecurities_CD5FDB6018867BCF86C806BF566F24B1_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecurities_CD5FDB6018867BCF86C806BF566F24B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_CD5FDB6018867BCF86C806BF566F24B1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecurities_CD5FDB6018867BCF86C806BF566F24B1" xlink:to="lab_us-gaap_AvailableForSaleSecurities_CD5FDB6018867BCF86C806BF566F24B1" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquitySecuritiesFvNi_B286168D6F1459129F3906BF566F9DEC_terseLabel_en-US" xlink:label="lab_us-gaap_EquitySecuritiesFvNi_B286168D6F1459129F3906BF566F9DEC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Securities at fair value</link:label>
    <link:label id="lab_us-gaap_EquitySecuritiesFvNi_B286168D6F1459129F3906BF566F9DEC_label_en-US" xlink:label="lab_us-gaap_EquitySecuritiesFvNi_B286168D6F1459129F3906BF566F9DEC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Securities, FV-NI</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesFvNi" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_B286168D6F1459129F3906BF566F9DEC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySecuritiesFvNi_B286168D6F1459129F3906BF566F9DEC" xlink:to="lab_us-gaap_EquitySecuritiesFvNi_B286168D6F1459129F3906BF566F9DEC" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestRateDerivativeAssetsAtFairValue_C0FB5C8845CBE3D01CD606BF566F84C3_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateDerivativeAssetsAtFairValue_C0FB5C8845CBE3D01CD606BF566F84C3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets (Interest rate contracts)</link:label>
    <link:label id="lab_us-gaap_InterestRateDerivativeAssetsAtFairValue_C0FB5C8845CBE3D01CD606BF566F84C3_label_en-US" xlink:label="lab_us-gaap_InterestRateDerivativeAssetsAtFairValue_C0FB5C8845CBE3D01CD606BF566F84C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Derivative Assets, at Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateDerivativeAssetsAtFairValue" xlink:label="loc_us-gaap_InterestRateDerivativeAssetsAtFairValue_C0FB5C8845CBE3D01CD606BF566F84C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateDerivativeAssetsAtFairValue_C0FB5C8845CBE3D01CD606BF566F84C3" xlink:to="lab_us-gaap_InterestRateDerivativeAssetsAtFairValue_C0FB5C8845CBE3D01CD606BF566F84C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_8F8AB7AD4DC04F372E3606BF566FA149_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_8F8AB7AD4DC04F372E3606BF566FA149" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities (Interest rate contracts)</link:label>
    <link:label id="lab_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_8F8AB7AD4DC04F372E3606BF566FA149_label_en-US" xlink:label="lab_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_8F8AB7AD4DC04F372E3606BF566FA149" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Derivative Liabilities, at Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateDerivativeLiabilitiesAtFairValue" xlink:label="loc_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_8F8AB7AD4DC04F372E3606BF566FA149" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_8F8AB7AD4DC04F372E3606BF566FA149" xlink:to="lab_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_8F8AB7AD4DC04F372E3606BF566FA149" xlink:type="arc" />
    <link:label id="lab_us-gaap_CompensationAndRetirementDisclosureAbstract_C112A2B55DD46A80F9E75B4F096F6DB2_label_en-US" xlink:label="lab_us-gaap_CompensationAndRetirementDisclosureAbstract_C112A2B55DD46A80F9E75B4F096F6DB2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retirement Benefits [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:label="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_C112A2B55DD46A80F9E75B4F096F6DB2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CompensationAndRetirementDisclosureAbstract_C112A2B55DD46A80F9E75B4F096F6DB2" xlink:to="lab_us-gaap_CompensationAndRetirementDisclosureAbstract_C112A2B55DD46A80F9E75B4F096F6DB2" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_B24E1E1F96A1AA25EAFF5B4F096F6FED_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_B24E1E1F96A1AA25EAFF5B4F096F6FED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_B24E1E1F96A1AA25EAFF5B4F096F6FED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_B24E1E1F96A1AA25EAFF5B4F096F6FED" xlink:to="lab_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_B24E1E1F96A1AA25EAFF5B4F096F6FED" xlink:type="arc" />
    <link:label id="lab_colb_EmployeeBenefitAxis_47DAF1109EF62338D9115B4F096FC403_label_en-US" xlink:label="lab_colb_EmployeeBenefitAxis_47DAF1109EF62338D9115B4F096FC403" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Benefit [Axis]</link:label>
    <link:label id="lab_colb_EmployeeBenefitAxis_47DAF1109EF62338D9115B4F096FC403_documentation_en-US" xlink:label="lab_colb_EmployeeBenefitAxis_47DAF1109EF62338D9115B4F096FC403" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Benefit [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_EmployeeBenefitAxis" xlink:label="loc_colb_EmployeeBenefitAxis_47DAF1109EF62338D9115B4F096FC403" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_EmployeeBenefitAxis_47DAF1109EF62338D9115B4F096FC403" xlink:to="lab_colb_EmployeeBenefitAxis_47DAF1109EF62338D9115B4F096FC403" xlink:type="arc" />
    <link:label id="lab_colb_EmployeeBenefitDomain_996DEF43898D60E25DA25B4F096FAFD5_label_en-US" xlink:label="lab_colb_EmployeeBenefitDomain_996DEF43898D60E25DA25B4F096FAFD5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Benefit [Domain]</link:label>
    <link:label id="lab_colb_EmployeeBenefitDomain_996DEF43898D60E25DA25B4F096FAFD5_documentation_en-US" xlink:label="lab_colb_EmployeeBenefitDomain_996DEF43898D60E25DA25B4F096FAFD5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Benefit [Domain]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_EmployeeBenefitDomain" xlink:label="loc_colb_EmployeeBenefitDomain_996DEF43898D60E25DA25B4F096FAFD5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_EmployeeBenefitDomain_996DEF43898D60E25DA25B4F096FAFD5" xlink:to="lab_colb_EmployeeBenefitDomain_996DEF43898D60E25DA25B4F096FAFD5" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_D16A3A53277905C34CB95B4F096F68FF_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_D16A3A53277905C34CB95B4F096F68FF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">SERP [Member]</link:label>
    <link:label id="lab_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_D16A3A53277905C34CB95B4F096F68FF_label_en-US" xlink:label="lab_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_D16A3A53277905C34CB95B4F096F68FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Employee Retirement Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember" xlink:label="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_D16A3A53277905C34CB95B4F096F68FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_D16A3A53277905C34CB95B4F096F68FF" xlink:to="lab_us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember_D16A3A53277905C34CB95B4F096F68FF" xlink:type="arc" />
    <link:label id="lab_colb_EmployeeBenefitLineItems_029C280296075F4823BB5B4F096FAB39_label_en-US" xlink:label="lab_colb_EmployeeBenefitLineItems_029C280296075F4823BB5B4F096FAB39" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Benefit [Line Items]</link:label>
    <link:label id="lab_colb_EmployeeBenefitLineItems_029C280296075F4823BB5B4F096FAB39_documentation_en-US" xlink:label="lab_colb_EmployeeBenefitLineItems_029C280296075F4823BB5B4F096FAB39" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Benefit [Line Items]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_EmployeeBenefitLineItems" xlink:label="loc_colb_EmployeeBenefitLineItems_029C280296075F4823BB5B4F096FAB39" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_EmployeeBenefitLineItems_029C280296075F4823BB5B4F096FAB39" xlink:to="lab_colb_EmployeeBenefitLineItems_029C280296075F4823BB5B4F096FAB39" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_41763CA90DCDEE5EF8A35B4F096FE40B_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_41763CA90DCDEE5EF8A35B4F096FE40B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Accumulated and Projected Benefit Obligations</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_41763CA90DCDEE5EF8A35B4F096FE40B_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_41763CA90DCDEE5EF8A35B4F096FE40B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Accumulated and Projected Benefit Obligations [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_41763CA90DCDEE5EF8A35B4F096FE40B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_41763CA90DCDEE5EF8A35B4F096FE40B" xlink:to="lab_us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock_41763CA90DCDEE5EF8A35B4F096FE40B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_423A289FCE2BAF454E715B4F096FFC0E_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_423A289FCE2BAF454E715B4F096FFC0E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Expected Benefit Payments</link:label>
    <link:label id="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_423A289FCE2BAF454E715B4F096FFC0E_label_en-US" xlink:label="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_423A289FCE2BAF454E715B4F096FFC0E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Expected Benefit Payments [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_423A289FCE2BAF454E715B4F096FFC0E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_423A289FCE2BAF454E715B4F096FFC0E" xlink:to="lab_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_423A289FCE2BAF454E715B4F096FFC0E" xlink:type="arc" />
    <link:label id="lab_srt_ScheduleOfCondensedFinancialStatementsTable_E9D96528E8CC43FF31D75B4F08D32379_terseLabel_en-US" xlink:label="lab_srt_ScheduleOfCondensedFinancialStatementsTable_E9D96528E8CC43FF31D75B4F08D32379" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Condensed Financial Statements [Table]</link:label>
    <link:label id="lab_srt_ScheduleOfCondensedFinancialStatementsTable_E9D96528E8CC43FF31D75B4F08D32379_label_en-US" xlink:label="lab_srt_ScheduleOfCondensedFinancialStatementsTable_E9D96528E8CC43FF31D75B4F08D32379" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Financial Statements [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ScheduleOfCondensedFinancialStatementsTable" xlink:label="loc_srt_ScheduleOfCondensedFinancialStatementsTable_E9D96528E8CC43FF31D75B4F08D32379" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScheduleOfCondensedFinancialStatementsTable_E9D96528E8CC43FF31D75B4F08D32379" xlink:to="lab_srt_ScheduleOfCondensedFinancialStatementsTable_E9D96528E8CC43FF31D75B4F08D32379" xlink:type="arc" />
    <link:label id="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_E1F0EE68A2AA7B845C205B4F08D3B34A_terseLabel_en-US" xlink:label="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_E1F0EE68A2AA7B845C205B4F08D3B34A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Equity Method Investment, Equity Method Investee, Name [Axis]</link:label>
    <link:label id="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_E1F0EE68A2AA7B845C205B4F08D3B34A_label_en-US" xlink:label="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_E1F0EE68A2AA7B845C205B4F08D3B34A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_E1F0EE68A2AA7B845C205B4F08D3B34A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_E1F0EE68A2AA7B845C205B4F08D3B34A" xlink:to="lab_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_E1F0EE68A2AA7B845C205B4F08D3B34A" xlink:type="arc" />
    <link:label id="lab_srt_EquityMethodInvesteeNameDomain_9C9564618839BB1A9CF65B4F08D36677_terseLabel_en-US" xlink:label="lab_srt_EquityMethodInvesteeNameDomain_9C9564618839BB1A9CF65B4F08D36677" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Method Investee, Name [Domain]</link:label>
    <link:label id="lab_srt_EquityMethodInvesteeNameDomain_9C9564618839BB1A9CF65B4F08D36677_label_en-US" xlink:label="lab_srt_EquityMethodInvesteeNameDomain_9C9564618839BB1A9CF65B4F08D36677" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment, Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_9C9564618839BB1A9CF65B4F08D36677" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_9C9564618839BB1A9CF65B4F08D36677" xlink:to="lab_srt_EquityMethodInvesteeNameDomain_9C9564618839BB1A9CF65B4F08D36677" xlink:type="arc" />
    <link:label id="lab_colb_BankingSubsidiariesMember_1423EB9DC2B9A7F83F5A5B4F08D3D30E_terseLabel_en-US" xlink:label="lab_colb_BankingSubsidiariesMember_1423EB9DC2B9A7F83F5A5B4F08D3D30E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Banking Subsidiaries [Member]</link:label>
    <link:label id="lab_colb_BankingSubsidiariesMember_1423EB9DC2B9A7F83F5A5B4F08D3D30E_label_en-US" xlink:label="lab_colb_BankingSubsidiariesMember_1423EB9DC2B9A7F83F5A5B4F08D3D30E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Banking Subsidiaries [Member]</link:label>
    <link:label id="lab_colb_BankingSubsidiariesMember_1423EB9DC2B9A7F83F5A5B4F08D3D30E_documentation_en-US" xlink:label="lab_colb_BankingSubsidiariesMember_1423EB9DC2B9A7F83F5A5B4F08D3D30E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Banking Subsidiaries [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BankingSubsidiariesMember" xlink:label="loc_colb_BankingSubsidiariesMember_1423EB9DC2B9A7F83F5A5B4F08D3D30E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BankingSubsidiariesMember_1423EB9DC2B9A7F83F5A5B4F08D3D30E" xlink:to="lab_colb_BankingSubsidiariesMember_1423EB9DC2B9A7F83F5A5B4F08D3D30E" xlink:type="arc" />
    <link:label id="lab_colb_OtherSubsidiariesMember_9A3F9BA83F6F4A0B8A095B4F08D37BD8_terseLabel_en-US" xlink:label="lab_colb_OtherSubsidiariesMember_9A3F9BA83F6F4A0B8A095B4F08D37BD8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Subsidiaries [Member]</link:label>
    <link:label id="lab_colb_OtherSubsidiariesMember_9A3F9BA83F6F4A0B8A095B4F08D37BD8_label_en-US" xlink:label="lab_colb_OtherSubsidiariesMember_9A3F9BA83F6F4A0B8A095B4F08D37BD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Subsidiaries [Member]</link:label>
    <link:label id="lab_colb_OtherSubsidiariesMember_9A3F9BA83F6F4A0B8A095B4F08D37BD8_documentation_en-US" xlink:label="lab_colb_OtherSubsidiariesMember_9A3F9BA83F6F4A0B8A095B4F08D37BD8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Subsidiaries [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OtherSubsidiariesMember" xlink:label="loc_colb_OtherSubsidiariesMember_9A3F9BA83F6F4A0B8A095B4F08D37BD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OtherSubsidiariesMember_9A3F9BA83F6F4A0B8A095B4F08D37BD8" xlink:to="lab_colb_OtherSubsidiariesMember_9A3F9BA83F6F4A0B8A095B4F08D37BD8" xlink:type="arc" />
    <link:label id="lab_srt_ConsolidatedEntitiesAxis_74CC165B4175D637D4365B4F08D3EE39_terseLabel_en-US" xlink:label="lab_srt_ConsolidatedEntitiesAxis_74CC165B4175D637D4365B4F08D3EE39" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Axis]</link:label>
    <link:label id="lab_srt_ConsolidatedEntitiesAxis_74CC165B4175D637D4365B4F08D3EE39_label_en-US" xlink:label="lab_srt_ConsolidatedEntitiesAxis_74CC165B4175D637D4365B4F08D3EE39" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="loc_srt_ConsolidatedEntitiesAxis_74CC165B4175D637D4365B4F08D3EE39" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidatedEntitiesAxis_74CC165B4175D637D4365B4F08D3EE39" xlink:to="lab_srt_ConsolidatedEntitiesAxis_74CC165B4175D637D4365B4F08D3EE39" xlink:type="arc" />
    <link:label id="lab_srt_ConsolidatedEntitiesDomain_15FD434795EE619921745B4F08D33F30_terseLabel_en-US" xlink:label="lab_srt_ConsolidatedEntitiesDomain_15FD434795EE619921745B4F08D33F30" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Domain]</link:label>
    <link:label id="lab_srt_ConsolidatedEntitiesDomain_15FD434795EE619921745B4F08D33F30_label_en-US" xlink:label="lab_srt_ConsolidatedEntitiesDomain_15FD434795EE619921745B4F08D33F30" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidated Entities [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidatedEntitiesDomain" xlink:label="loc_srt_ConsolidatedEntitiesDomain_15FD434795EE619921745B4F08D33F30" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidatedEntitiesDomain_15FD434795EE619921745B4F08D33F30" xlink:to="lab_srt_ConsolidatedEntitiesDomain_15FD434795EE619921745B4F08D33F30" xlink:type="arc" />
    <link:label id="lab_srt_ParentCompanyMember_774724B5DAC789A560F15B4F08D3186B_terseLabel_en-US" xlink:label="lab_srt_ParentCompanyMember_774724B5DAC789A560F15B4F08D3186B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Parent Company [Member]</link:label>
    <link:label id="lab_srt_ParentCompanyMember_774724B5DAC789A560F15B4F08D3186B_label_en-US" xlink:label="lab_srt_ParentCompanyMember_774724B5DAC789A560F15B4F08D3186B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Parent Company [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ParentCompanyMember" xlink:label="loc_srt_ParentCompanyMember_774724B5DAC789A560F15B4F08D3186B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ParentCompanyMember_774724B5DAC789A560F15B4F08D3186B" xlink:to="lab_srt_ParentCompanyMember_774724B5DAC789A560F15B4F08D3186B" xlink:type="arc" />
    <link:label id="lab_srt_CondensedFinancialStatementsCaptionsLineItems_2F53596C9E5B204F78DA5B4F08D3F948_terseLabel_en-US" xlink:label="lab_srt_CondensedFinancialStatementsCaptionsLineItems_2F53596C9E5B204F78DA5B4F08D3F948" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Condensed Financial Statements, Captions [Line Items]</link:label>
    <link:label id="lab_srt_CondensedFinancialStatementsCaptionsLineItems_2F53596C9E5B204F78DA5B4F08D3F948_label_en-US" xlink:label="lab_srt_CondensedFinancialStatementsCaptionsLineItems_2F53596C9E5B204F78DA5B4F08D3F948" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Financial Statements, Captions [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CondensedFinancialStatementsCaptionsLineItems" xlink:label="loc_srt_CondensedFinancialStatementsCaptionsLineItems_2F53596C9E5B204F78DA5B4F08D3F948" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CondensedFinancialStatementsCaptionsLineItems_2F53596C9E5B204F78DA5B4F08D3F948" xlink:to="lab_srt_CondensedFinancialStatementsCaptionsLineItems_2F53596C9E5B204F78DA5B4F08D3F948" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsAbstract_F2ACB91174085894A9C85B4F08D3DA3E_verboseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_F2ACB91174085894A9C85B4F08D3DA3E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_F2ACB91174085894A9C85B4F08D3DA3E_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_F2ACB91174085894A9C85B4F08D3DA3E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_F2ACB91174085894A9C85B4F08D3DA3E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract_F2ACB91174085894A9C85B4F08D3DA3E" xlink:to="lab_us-gaap_AssetsAbstract_F2ACB91174085894A9C85B4F08D3DA3E" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndDueFromBanks_6A1F7D10D08DF56FD78C5B4F08D3630C_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndDueFromBanks_6A1F7D10D08DF56FD78C5B4F08D3630C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and due from banks</link:label>
    <link:label id="lab_us-gaap_CashAndDueFromBanks_6A1F7D10D08DF56FD78C5B4F08D3630C_label_en-US" xlink:label="lab_us-gaap_CashAndDueFromBanks_6A1F7D10D08DF56FD78C5B4F08D3630C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Due from Banks</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndDueFromBanks" xlink:label="loc_us-gaap_CashAndDueFromBanks_6A1F7D10D08DF56FD78C5B4F08D3630C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndDueFromBanks_6A1F7D10D08DF56FD78C5B4F08D3630C" xlink:to="lab_us-gaap_CashAndDueFromBanks_6A1F7D10D08DF56FD78C5B4F08D3630C" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestBearingDepositsInBanks_89E9AEB96C0A6B76D6B95B4F08D3C040_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestBearingDepositsInBanks_89E9AEB96C0A6B76D6B95B4F08D3C040" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Interest-earning deposits</link:label>
    <link:label id="lab_us-gaap_InterestBearingDepositsInBanks_89E9AEB96C0A6B76D6B95B4F08D3C040_label_en-US" xlink:label="lab_us-gaap_InterestBearingDepositsInBanks_89E9AEB96C0A6B76D6B95B4F08D3C040" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest-bearing Deposits in Banks and Other Financial Institutions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestBearingDepositsInBanks" xlink:label="loc_us-gaap_InterestBearingDepositsInBanks_89E9AEB96C0A6B76D6B95B4F08D3C040" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestBearingDepositsInBanks_89E9AEB96C0A6B76D6B95B4F08D3C040" xlink:to="lab_us-gaap_InterestBearingDepositsInBanks_89E9AEB96C0A6B76D6B95B4F08D3C040" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_80F5E3BC0432B37906635B4F08D384F1_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_80F5E3BC0432B37906635B4F08D384F1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_80F5E3BC0432B37906635B4F08D384F1_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_80F5E3BC0432B37906635B4F08D384F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_80F5E3BC0432B37906635B4F08D384F1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_80F5E3BC0432B37906635B4F08D384F1" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_80F5E3BC0432B37906635B4F08D384F1" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityMethodInvestments_0D99BB39A2704F9DBBF25B4F08D35061_terseLabel_en-US" xlink:label="lab_us-gaap_EquityMethodInvestments_0D99BB39A2704F9DBBF25B4F08D35061" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment in subsidiaries</link:label>
    <link:label id="lab_us-gaap_EquityMethodInvestments_0D99BB39A2704F9DBBF25B4F08D35061_label_en-US" xlink:label="lab_us-gaap_EquityMethodInvestments_0D99BB39A2704F9DBBF25B4F08D35061" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Method Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityMethodInvestments" xlink:label="loc_us-gaap_EquityMethodInvestments_0D99BB39A2704F9DBBF25B4F08D35061" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityMethodInvestments_0D99BB39A2704F9DBBF25B4F08D35061" xlink:to="lab_us-gaap_EquityMethodInvestments_0D99BB39A2704F9DBBF25B4F08D35061" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_B7BEB96F4309403061045B4F08D3D5D3_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_B7BEB96F4309403061045B4F08D3D5D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_Goodwill_B7BEB96F4309403061045B4F08D3D5D3_label_en-US" xlink:label="lab_us-gaap_Goodwill_B7BEB96F4309403061045B4F08D3D5D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_B7BEB96F4309403061045B4F08D3D5D3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_B7BEB96F4309403061045B4F08D3D5D3" xlink:to="lab_us-gaap_Goodwill_B7BEB96F4309403061045B4F08D3D5D3" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAssets_F181656DD49A2F4690E05B4F08D3F891_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssets_F181656DD49A2F4690E05B4F08D3F891" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_us-gaap_OtherAssets_F181656DD49A2F4690E05B4F08D3F891_label_en-US" xlink:label="lab_us-gaap_OtherAssets_F181656DD49A2F4690E05B4F08D3F891" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssets" xlink:label="loc_us-gaap_OtherAssets_F181656DD49A2F4690E05B4F08D3F891" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssets_F181656DD49A2F4690E05B4F08D3F891" xlink:to="lab_us-gaap_OtherAssets_F181656DD49A2F4690E05B4F08D3F891" xlink:type="arc" />
    <link:label id="lab_us-gaap_Assets_3809C4B480ECF47A028E5B4F08D3A460_terseLabel_en-US" xlink:label="lab_us-gaap_Assets_3809C4B480ECF47A028E5B4F08D3A460" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Assets</link:label>
    <link:label id="lab_us-gaap_Assets_3809C4B480ECF47A028E5B4F08D3A460_label_en-US" xlink:label="lab_us-gaap_Assets_3809C4B480ECF47A028E5B4F08D3A460" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_3809C4B480ECF47A028E5B4F08D3A460" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_3809C4B480ECF47A028E5B4F08D3A460" xlink:to="lab_us-gaap_Assets_3809C4B480ECF47A028E5B4F08D3A460" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubordinatedDebt_BA5648C36460120A86525B4F08D31558_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedDebt_BA5648C36460120A86525B4F08D31558" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated Debt</link:label>
    <link:label id="lab_us-gaap_SubordinatedDebt_BA5648C36460120A86525B4F08D31558_label_en-US" xlink:label="lab_us-gaap_SubordinatedDebt_BA5648C36460120A86525B4F08D31558" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubordinatedDebt" xlink:label="loc_us-gaap_SubordinatedDebt_BA5648C36460120A86525B4F08D31558" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedDebt_BA5648C36460120A86525B4F08D31558" xlink:to="lab_us-gaap_SubordinatedDebt_BA5648C36460120A86525B4F08D31558" xlink:type="arc" />
    <link:label id="lab_us-gaap_JuniorSubordinatedNotes_50282A746FEEF03E0E855B4F08D3E57E_terseLabel_en-US" xlink:label="lab_us-gaap_JuniorSubordinatedNotes_50282A746FEEF03E0E855B4F08D3E57E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Junior Subordinated Notes</link:label>
    <link:label id="lab_us-gaap_JuniorSubordinatedNotes_50282A746FEEF03E0E855B4F08D3E57E_label_en-US" xlink:label="lab_us-gaap_JuniorSubordinatedNotes_50282A746FEEF03E0E855B4F08D3E57E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Junior Subordinated Notes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JuniorSubordinatedNotes" xlink:label="loc_us-gaap_JuniorSubordinatedNotes_50282A746FEEF03E0E855B4F08D3E57E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_JuniorSubordinatedNotes_50282A746FEEF03E0E855B4F08D3E57E" xlink:to="lab_us-gaap_JuniorSubordinatedNotes_50282A746FEEF03E0E855B4F08D3E57E" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D2970ABA945B9628AADA5B4F08D361B9_verboseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D2970ABA945B9628AADA5B4F08D361B9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Liabilities and Shareholders&#8217; Equity</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D2970ABA945B9628AADA5B4F08D361B9_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D2970ABA945B9628AADA5B4F08D361B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D2970ABA945B9628AADA5B4F08D361B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D2970ABA945B9628AADA5B4F08D361B9" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D2970ABA945B9628AADA5B4F08D361B9" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherLiabilities_7CDCED4ADE8B88138E745B4F08D3E39C_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilities_7CDCED4ADE8B88138E745B4F08D3E39C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilities_7CDCED4ADE8B88138E745B4F08D3E39C_label_en-US" xlink:label="lab_us-gaap_OtherLiabilities_7CDCED4ADE8B88138E745B4F08D3E39C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilities" xlink:label="loc_us-gaap_OtherLiabilities_7CDCED4ADE8B88138E745B4F08D3E39C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilities_7CDCED4ADE8B88138E745B4F08D3E39C" xlink:to="lab_us-gaap_OtherLiabilities_7CDCED4ADE8B88138E745B4F08D3E39C" xlink:type="arc" />
    <link:label id="lab_us-gaap_Liabilities_6DDB0365E55A2D6794295B4F08D3FFB5_terseLabel_en-US" xlink:label="lab_us-gaap_Liabilities_6DDB0365E55A2D6794295B4F08D3FFB5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_us-gaap_Liabilities_6DDB0365E55A2D6794295B4F08D3FFB5_label_en-US" xlink:label="lab_us-gaap_Liabilities_6DDB0365E55A2D6794295B4F08D3FFB5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_6DDB0365E55A2D6794295B4F08D3FFB5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities_6DDB0365E55A2D6794295B4F08D3FFB5" xlink:to="lab_us-gaap_Liabilities_6DDB0365E55A2D6794295B4F08D3FFB5" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_79D24F8650CABE0AEF295B4F08D3FA79_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_79D24F8650CABE0AEF295B4F08D3FA79" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shareholders&#8217; equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_79D24F8650CABE0AEF295B4F08D3FA79_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity_79D24F8650CABE0AEF295B4F08D3FA79" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_79D24F8650CABE0AEF295B4F08D3FA79" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_79D24F8650CABE0AEF295B4F08D3FA79" xlink:to="lab_us-gaap_StockholdersEquity_79D24F8650CABE0AEF295B4F08D3FA79" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_759036B15CA5B9C322C05B4F08D3289B_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_759036B15CA5B9C322C05B4F08D3289B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total liabilities and shareholders' equity</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_759036B15CA5B9C322C05B4F08D3289B_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_759036B15CA5B9C322C05B4F08D3289B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_759036B15CA5B9C322C05B4F08D3289B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_759036B15CA5B9C322C05B4F08D3289B" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquity_759036B15CA5B9C322C05B4F08D3289B" xlink:type="arc" />
    <link:label id="lab_us-gaap_QuarterlyFinancialInformationTextBlock_3CE40FA3B52AAD2944020758F6D96AB3_terseLabel_en-US" xlink:label="lab_us-gaap_QuarterlyFinancialInformationTextBlock_3CE40FA3B52AAD2944020758F6D96AB3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of Quarterly Financial Information (Unaudited)</link:label>
    <link:label id="lab_us-gaap_QuarterlyFinancialInformationTextBlock_3CE40FA3B52AAD2944020758F6D96AB3_label_en-US" xlink:label="lab_us-gaap_QuarterlyFinancialInformationTextBlock_3CE40FA3B52AAD2944020758F6D96AB3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Quarterly Financial Information [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_QuarterlyFinancialInformationTextBlock" xlink:label="loc_us-gaap_QuarterlyFinancialInformationTextBlock_3CE40FA3B52AAD2944020758F6D96AB3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_QuarterlyFinancialInformationTextBlock_3CE40FA3B52AAD2944020758F6D96AB3" xlink:to="lab_us-gaap_QuarterlyFinancialInformationTextBlock_3CE40FA3B52AAD2944020758F6D96AB3" xlink:type="arc" />
    <link:label id="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseAbstract_A8A54EFCCC4B857A2594F285DF082F04_label_en-US" xlink:label="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseAbstract_A8A54EFCCC4B857A2594F285DF082F04" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities Sold under Agreements to Repurchase [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseAbstract" xlink:label="loc_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseAbstract_A8A54EFCCC4B857A2594F285DF082F04" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseAbstract_A8A54EFCCC4B857A2594F285DF082F04" xlink:to="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchaseAbstract_A8A54EFCCC4B857A2594F285DF082F04" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable_6329DB7A7CF98DE5E033F285DF08BE92_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable_6329DB7A7CF98DE5E033F285DF08BE92" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Assets Sold under Agreements to Repurchase [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable_6329DB7A7CF98DE5E033F285DF08BE92_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable_6329DB7A7CF98DE5E033F285DF08BE92" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Assets Sold under Agreements to Repurchase [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable" xlink:label="loc_us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable_6329DB7A7CF98DE5E033F285DF08BE92" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable_6329DB7A7CF98DE5E033F285DF08BE92" xlink:to="lab_us-gaap_ScheduleOfAssetsSoldUnderAgreementsToRepurchaseTable_6329DB7A7CF98DE5E033F285DF08BE92" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentAxis_E97546B583F8B96E3E9CF285DF18B14D_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentAxis_E97546B583F8B96E3E9CF285DF18B14D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_E97546B583F8B96E3E9CF285DF18B14D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentAxis_E97546B583F8B96E3E9CF285DF18B14D" xlink:to="lab_us-gaap_DebtInstrumentAxis_E97546B583F8B96E3E9CF285DF18B14D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_7F264C01EDE6E95EDAA5F285DF18BD01_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_7F264C01EDE6E95EDAA5F285DF18BD01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_7F264C01EDE6E95EDAA5F285DF18BD01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7F264C01EDE6E95EDAA5F285DF18BD01" xlink:to="lab_us-gaap_DebtInstrumentNameDomain_7F264C01EDE6E95EDAA5F285DF18BD01" xlink:type="arc" />
    <link:label id="lab_colb_RepurchaseAgreementsSweepMember_8DCD1734AC180A3148BEF285DF1838B9_terseLabel_en-US" xlink:label="lab_colb_RepurchaseAgreementsSweepMember_8DCD1734AC180A3148BEF285DF1838B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repurchase Agreements, Sweep [Member]</link:label>
    <link:label id="lab_colb_RepurchaseAgreementsSweepMember_8DCD1734AC180A3148BEF285DF1838B9_label_en-US" xlink:label="lab_colb_RepurchaseAgreementsSweepMember_8DCD1734AC180A3148BEF285DF1838B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repurchase Agreements, Sweep [Member]</link:label>
    <link:label id="lab_colb_RepurchaseAgreementsSweepMember_8DCD1734AC180A3148BEF285DF1838B9_documentation_en-US" xlink:label="lab_colb_RepurchaseAgreementsSweepMember_8DCD1734AC180A3148BEF285DF1838B9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Repurchase Agreements, Sweep [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_RepurchaseAgreementsSweepMember" xlink:label="loc_colb_RepurchaseAgreementsSweepMember_8DCD1734AC180A3148BEF285DF1838B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_RepurchaseAgreementsSweepMember_8DCD1734AC180A3148BEF285DF1838B9" xlink:to="lab_colb_RepurchaseAgreementsSweepMember_8DCD1734AC180A3148BEF285DF1838B9" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems_67C7A8C73383C9A2BDBDF285DF1871BA_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems_67C7A8C73383C9A2BDBDF285DF1871BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase [Line Items]</link:label>
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems_67C7A8C73383C9A2BDBDF285DF1871BA_label_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems_67C7A8C73383C9A2BDBDF285DF1871BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems" xlink:label="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems_67C7A8C73383C9A2BDBDF285DF1871BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems_67C7A8C73383C9A2BDBDF285DF1871BA" xlink:to="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseLineItems_67C7A8C73383C9A2BDBDF285DF1871BA" xlink:type="arc" />
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermInterestrate_008189685EBAF4048D30F285DF187515_terseLabel_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermInterestrate_008189685EBAF4048D30F285DF187515" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Term, Interest Rate</link:label>
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermInterestrate_008189685EBAF4048D30F285DF187515_label_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermInterestrate_008189685EBAF4048D30F285DF187515" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Term, Interest rate</link:label>
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermInterestrate_008189685EBAF4048D30F285DF187515_documentation_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermInterestrate_008189685EBAF4048D30F285DF187515" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest rate on the amount to be repaid to the counterparty to the Term repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AssetsSoldunderAgreementstoRepurchaseTermInterestrate" xlink:label="loc_colb_AssetsSoldunderAgreementstoRepurchaseTermInterestrate_008189685EBAF4048D30F285DF187515" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AssetsSoldunderAgreementstoRepurchaseTermInterestrate_008189685EBAF4048D30F285DF187515" xlink:to="lab_colb_AssetsSoldunderAgreementstoRepurchaseTermInterestrate_008189685EBAF4048D30F285DF187515" xlink:type="arc" />
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepInterestrate_D072C86FFBD77B9B9C10F285DF18CA99_terseLabel_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepInterestrate_D072C86FFBD77B9B9C10F285DF18CA99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Sweep, Interest rate</link:label>
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepInterestrate_D072C86FFBD77B9B9C10F285DF18CA99_label_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepInterestrate_D072C86FFBD77B9B9C10F285DF18CA99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets Sold under Agreements to Repurchase, Sweep, Interest rate</link:label>
    <link:label id="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepInterestrate_D072C86FFBD77B9B9C10F285DF18CA99_documentation_en-US" xlink:label="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepInterestrate_D072C86FFBD77B9B9C10F285DF18CA99" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest rate on the amount to be repaid to the counterparty to the sweep product repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AssetsSoldunderAgreementstoRepurchaseSweepInterestrate" xlink:label="loc_colb_AssetsSoldunderAgreementstoRepurchaseSweepInterestrate_D072C86FFBD77B9B9C10F285DF18CA99" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AssetsSoldunderAgreementstoRepurchaseSweepInterestrate_D072C86FFBD77B9B9C10F285DF18CA99" xlink:to="lab_colb_AssetsSoldunderAgreementstoRepurchaseSweepInterestrate_D072C86FFBD77B9B9C10F285DF18CA99" xlink:type="arc" />
    <link:label id="lab_us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements_9A99BF8E183176837C4DF285DF181125_verboseLabel_en-US" xlink:label="lab_us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements_9A99BF8E183176837C4DF285DF181125" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Carrying amount of securities pledged as collateral</link:label>
    <link:label id="lab_us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements_9A99BF8E183176837C4DF285DF181125_label_en-US" xlink:label="lab_us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements_9A99BF8E183176837C4DF285DF181125" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements" xlink:label="loc_us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements_9A99BF8E183176837C4DF285DF181125" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements_9A99BF8E183176837C4DF285DF181125" xlink:to="lab_us-gaap_PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesForRepurchaseAgreements_9A99BF8E183176837C4DF285DF181125" xlink:type="arc" />
    <link:label id="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceAxis_964569F09EB2C02A2F6C5B4F0AF55163_terseLabel_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceAxis_964569F09EB2C02A2F6C5B4F0AF55163" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired financing receivable without related allowance [Axis]</link:label>
    <link:label id="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceAxis_964569F09EB2C02A2F6C5B4F0AF55163_label_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceAxis_964569F09EB2C02A2F6C5B4F0AF55163" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired financing receivable without related allowance [Axis]</link:label>
    <link:label id="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceAxis_964569F09EB2C02A2F6C5B4F0AF55163_documentation_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceAxis_964569F09EB2C02A2F6C5B4F0AF55163" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Impaired financing receivable without related allowance [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ImpairedFinancingReceivableWithoutRelatedAllowanceAxis" xlink:label="loc_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceAxis_964569F09EB2C02A2F6C5B4F0AF55163" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceAxis_964569F09EB2C02A2F6C5B4F0AF55163" xlink:to="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceAxis_964569F09EB2C02A2F6C5B4F0AF55163" xlink:type="arc" />
    <link:label id="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceDomain_90EE7D467DE8BDB1B5065B4F0AF57418_terseLabel_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceDomain_90EE7D467DE8BDB1B5065B4F0AF57418" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired financing receivable without related allowance [Domain]</link:label>
    <link:label id="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceDomain_90EE7D467DE8BDB1B5065B4F0AF57418_label_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceDomain_90EE7D467DE8BDB1B5065B4F0AF57418" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired financing receivable without related allowance [Domain]</link:label>
    <link:label id="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceDomain_90EE7D467DE8BDB1B5065B4F0AF57418_documentation_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceDomain_90EE7D467DE8BDB1B5065B4F0AF57418" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Domain] for Impaired financing receivable without related allowance [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ImpairedFinancingReceivableWithoutRelatedAllowanceDomain" xlink:label="loc_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceDomain_90EE7D467DE8BDB1B5065B4F0AF57418" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceDomain_90EE7D467DE8BDB1B5065B4F0AF57418" xlink:to="lab_colb_ImpairedFinancingReceivableWithoutRelatedAllowanceDomain_90EE7D467DE8BDB1B5065B4F0AF57418" xlink:type="arc" />
    <link:label id="lab_colb_ImpairedLoansWithoutRecordedAllowanceMember_EC92CF608C13AE62EE535B4F0AF50982_terseLabel_en-US" xlink:label="lab_colb_ImpairedLoansWithoutRecordedAllowanceMember_EC92CF608C13AE62EE535B4F0AF50982" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired Loans Without Recorded Allowance [Member]</link:label>
    <link:label id="lab_colb_ImpairedLoansWithoutRecordedAllowanceMember_EC92CF608C13AE62EE535B4F0AF50982_label_en-US" xlink:label="lab_colb_ImpairedLoansWithoutRecordedAllowanceMember_EC92CF608C13AE62EE535B4F0AF50982" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Loans Without Recorded Allowance [Member]</link:label>
    <link:label id="lab_colb_ImpairedLoansWithoutRecordedAllowanceMember_EC92CF608C13AE62EE535B4F0AF50982_documentation_en-US" xlink:label="lab_colb_ImpairedLoansWithoutRecordedAllowanceMember_EC92CF608C13AE62EE535B4F0AF50982" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Impaired Loans Without Recorded Allowance [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ImpairedLoansWithoutRecordedAllowanceMember" xlink:label="loc_colb_ImpairedLoansWithoutRecordedAllowanceMember_EC92CF608C13AE62EE535B4F0AF50982" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ImpairedLoansWithoutRecordedAllowanceMember_EC92CF608C13AE62EE535B4F0AF50982" xlink:to="lab_colb_ImpairedLoansWithoutRecordedAllowanceMember_EC92CF608C13AE62EE535B4F0AF50982" xlink:type="arc" />
    <link:label id="lab_colb_ImpairedFinancingReceivableWithAllowanceAxis_986455ED29CC9A8593415B4F0AF5C1D4_terseLabel_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithAllowanceAxis_986455ED29CC9A8593415B4F0AF5C1D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">impaired financing receivable with allowance [Axis]</link:label>
    <link:label id="lab_colb_ImpairedFinancingReceivableWithAllowanceAxis_986455ED29CC9A8593415B4F0AF5C1D4_label_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithAllowanceAxis_986455ED29CC9A8593415B4F0AF5C1D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">impaired financing receivable with allowance [Axis]</link:label>
    <link:label id="lab_colb_ImpairedFinancingReceivableWithAllowanceAxis_986455ED29CC9A8593415B4F0AF5C1D4_documentation_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithAllowanceAxis_986455ED29CC9A8593415B4F0AF5C1D4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">impaired financing receivable with allowance [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ImpairedFinancingReceivableWithAllowanceAxis" xlink:label="loc_colb_ImpairedFinancingReceivableWithAllowanceAxis_986455ED29CC9A8593415B4F0AF5C1D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ImpairedFinancingReceivableWithAllowanceAxis_986455ED29CC9A8593415B4F0AF5C1D4" xlink:to="lab_colb_ImpairedFinancingReceivableWithAllowanceAxis_986455ED29CC9A8593415B4F0AF5C1D4" xlink:type="arc" />
    <link:label id="lab_colb_ImpairedFinancingReceivableWithAllowanceDomain_4B7D08E28DE38E2E26485B4F0AF5BAF8_terseLabel_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithAllowanceDomain_4B7D08E28DE38E2E26485B4F0AF5BAF8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">impaired financing receivable with allowance [Domain]</link:label>
    <link:label id="lab_colb_ImpairedFinancingReceivableWithAllowanceDomain_4B7D08E28DE38E2E26485B4F0AF5BAF8_label_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithAllowanceDomain_4B7D08E28DE38E2E26485B4F0AF5BAF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">impaired financing receivable with allowance [Domain]</link:label>
    <link:label id="lab_colb_ImpairedFinancingReceivableWithAllowanceDomain_4B7D08E28DE38E2E26485B4F0AF5BAF8_documentation_en-US" xlink:label="lab_colb_ImpairedFinancingReceivableWithAllowanceDomain_4B7D08E28DE38E2E26485B4F0AF5BAF8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Domain] for impaired financing receivable with allowance [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ImpairedFinancingReceivableWithAllowanceDomain" xlink:label="loc_colb_ImpairedFinancingReceivableWithAllowanceDomain_4B7D08E28DE38E2E26485B4F0AF5BAF8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ImpairedFinancingReceivableWithAllowanceDomain_4B7D08E28DE38E2E26485B4F0AF5BAF8" xlink:to="lab_colb_ImpairedFinancingReceivableWithAllowanceDomain_4B7D08E28DE38E2E26485B4F0AF5BAF8" xlink:type="arc" />
    <link:label id="lab_colb_ImpairedLoansWithRecordedAllowanceMember_6A525D76EA95174F1E545B4F0B0573D5_terseLabel_en-US" xlink:label="lab_colb_ImpairedLoansWithRecordedAllowanceMember_6A525D76EA95174F1E545B4F0B0573D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired Loans With Recorded Allowance [Member]</link:label>
    <link:label id="lab_colb_ImpairedLoansWithRecordedAllowanceMember_6A525D76EA95174F1E545B4F0B0573D5_label_en-US" xlink:label="lab_colb_ImpairedLoansWithRecordedAllowanceMember_6A525D76EA95174F1E545B4F0B0573D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Loans With Recorded Allowance [Member]</link:label>
    <link:label id="lab_colb_ImpairedLoansWithRecordedAllowanceMember_6A525D76EA95174F1E545B4F0B0573D5_documentation_en-US" xlink:label="lab_colb_ImpairedLoansWithRecordedAllowanceMember_6A525D76EA95174F1E545B4F0B0573D5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Impaired Loans With Recorded Allowance [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ImpairedLoansWithRecordedAllowanceMember" xlink:label="loc_colb_ImpairedLoansWithRecordedAllowanceMember_6A525D76EA95174F1E545B4F0B0573D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ImpairedLoansWithRecordedAllowanceMember_6A525D76EA95174F1E545B4F0B0573D5" xlink:to="lab_colb_ImpairedLoansWithRecordedAllowanceMember_6A525D76EA95174F1E545B4F0B0573D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementLineItems_874FB785545CD656E3FD5B4F0B05085B_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems_874FB785545CD656E3FD5B4F0B05085B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:label id="lab_us-gaap_StatementLineItems_874FB785545CD656E3FD5B4F0B05085B_label_en-US" xlink:label="lab_us-gaap_StatementLineItems_874FB785545CD656E3FD5B4F0B05085B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_874FB785545CD656E3FD5B4F0B05085B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems_874FB785545CD656E3FD5B4F0B05085B" xlink:to="lab_us-gaap_StatementLineItems_874FB785545CD656E3FD5B4F0B05085B" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableModificationsNumberOfContracts2_48E4AF13C260DD191E805B4F0B05602E_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsNumberOfContracts2_48E4AF13C260DD191E805B4F0B05602E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications, Number of Contracts</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableModificationsNumberOfContracts2_48E4AF13C260DD191E805B4F0B05602E_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsNumberOfContracts2_48E4AF13C260DD191E805B4F0B05602E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications, Number of Contracts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableModificationsNumberOfContracts2" xlink:label="loc_us-gaap_FinancingReceivableModificationsNumberOfContracts2_48E4AF13C260DD191E805B4F0B05602E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableModificationsNumberOfContracts2_48E4AF13C260DD191E805B4F0B05602E" xlink:to="lab_us-gaap_FinancingReceivableModificationsNumberOfContracts2_48E4AF13C260DD191E805B4F0B05602E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_3E75A9EAEAE88318A34A5B4F0B0593BF_verboseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_3E75A9EAEAE88318A34A5B4F0B0593BF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Recorded Investment of Loans Collectively Measured for Contingency Provision</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_3E75A9EAEAE88318A34A5B4F0B0593BF_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_3E75A9EAEAE88318A34A5B4F0B0593BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Collectively Evaluated for Impairment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment" xlink:label="loc_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_3E75A9EAEAE88318A34A5B4F0B0593BF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_3E75A9EAEAE88318A34A5B4F0B0593BF" xlink:to="lab_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_3E75A9EAEAE88318A34A5B4F0B0593BF" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_C49881B0BAEF188556965B4F0B052E77_verboseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_C49881B0BAEF188556965B4F0B052E77" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Recorded Investment of Loans Individually Measured for Specific Impairment</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_C49881B0BAEF188556965B4F0B052E77_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_C49881B0BAEF188556965B4F0B052E77" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Individually Evaluated for Impairment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment" xlink:label="loc_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_C49881B0BAEF188556965B4F0B052E77" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_C49881B0BAEF188556965B4F0B052E77" xlink:to="lab_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_C49881B0BAEF188556965B4F0B052E77" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D1CB5478F224E5FD71E45B4F0B052604_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D1CB5478F224E5FD71E45B4F0B052604" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recorded Investment</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D1CB5478F224E5FD71E45B4F0B052604_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D1CB5478F224E5FD71E45B4F0B052604" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivable, Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairedFinancingReceivableRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D1CB5478F224E5FD71E45B4F0B052604" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D1CB5478F224E5FD71E45B4F0B052604" xlink:to="lab_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D1CB5478F224E5FD71E45B4F0B052604" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_71B20F7FC119838CD2855B4F0B0569E1_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_71B20F7FC119838CD2855B4F0B0569E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_71B20F7FC119838CD2855B4F0B0569E1_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_71B20F7FC119838CD2855B4F0B0569E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivable, Unpaid Principal Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance" xlink:label="loc_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_71B20F7FC119838CD2855B4F0B0569E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_71B20F7FC119838CD2855B4F0B0569E1" xlink:to="lab_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_71B20F7FC119838CD2855B4F0B0569E1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableRelatedAllowance_BC5A524B420252F6CAE15B4F0B05EE9C_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableRelatedAllowance_BC5A524B420252F6CAE15B4F0B05EE9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Allowance</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableRelatedAllowance_BC5A524B420252F6CAE15B4F0B05EE9C_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableRelatedAllowance_BC5A524B420252F6CAE15B4F0B05EE9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivable, Related Allowance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairedFinancingReceivableRelatedAllowance" xlink:label="loc_us-gaap_ImpairedFinancingReceivableRelatedAllowance_BC5A524B420252F6CAE15B4F0B05EE9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableRelatedAllowance_BC5A524B420252F6CAE15B4F0B05EE9C" xlink:to="lab_us-gaap_ImpairedFinancingReceivableRelatedAllowance_BC5A524B420252F6CAE15B4F0B05EE9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_BFD58F9092DAF82607915B4F0B05C863_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_BFD58F9092DAF82607915B4F0B05C863" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivable, Average Recorded Investment</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_BFD58F9092DAF82607915B4F0B05C863_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_BFD58F9092DAF82607915B4F0B05C863" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivable, Average Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_BFD58F9092DAF82607915B4F0B05C863" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_BFD58F9092DAF82607915B4F0B05C863" xlink:to="lab_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_BFD58F9092DAF82607915B4F0B05C863" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_C1B7E436BB37930DAC885B4F0B051332_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_C1B7E436BB37930DAC885B4F0B051332" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivable, Interest Income, Accrual Method</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_C1B7E436BB37930DAC885B4F0B051332_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_C1B7E436BB37930DAC885B4F0B051332" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivable, Interest Income, Accrual Method</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod" xlink:label="loc_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_C1B7E436BB37930DAC885B4F0B051332" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_C1B7E436BB37930DAC885B4F0B051332" xlink:to="lab_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_C1B7E436BB37930DAC885B4F0B051332" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_F535845785E4DD886A835B4F07F9B943_label_en-US" xlink:label="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_F535845785E4DD886A835B4F07F9B943" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Comprehensive Income [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_F535845785E4DD886A835B4F07F9B943" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_F535845785E4DD886A835B4F07F9B943" xlink:to="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_F535845785E4DD886A835B4F07F9B943" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementTable_73E105CA1C59A2BF46E65B4F07F9495F_terseLabel_en-US" xlink:label="lab_us-gaap_StatementTable_73E105CA1C59A2BF46E65B4F07F9495F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:label id="lab_us-gaap_StatementTable_73E105CA1C59A2BF46E65B4F07F9495F_label_en-US" xlink:label="lab_us-gaap_StatementTable_73E105CA1C59A2BF46E65B4F07F9495F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_73E105CA1C59A2BF46E65B4F07F9495F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable_73E105CA1C59A2BF46E65B4F07F9495F" xlink:to="lab_us-gaap_StatementTable_73E105CA1C59A2BF46E65B4F07F9495F" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementScenarioAxis_333FF869B1A368F387575B4F07F962BB_terseLabel_en-US" xlink:label="lab_us-gaap_StatementScenarioAxis_333FF869B1A368F387575B4F07F962BB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Scenario [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementScenarioAxis_333FF869B1A368F387575B4F07F962BB_label_en-US" xlink:label="lab_us-gaap_StatementScenarioAxis_333FF869B1A368F387575B4F07F962BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Scenario [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_333FF869B1A368F387575B4F07F962BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementScenarioAxis_333FF869B1A368F387575B4F07F962BB" xlink:to="lab_us-gaap_StatementScenarioAxis_333FF869B1A368F387575B4F07F962BB" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScenarioUnspecifiedDomain_DDFA78DDC5B550B3924A5B4F07F9E7C9_terseLabel_en-US" xlink:label="lab_us-gaap_ScenarioUnspecifiedDomain_DDFA78DDC5B550B3924A5B4F07F9E7C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Scenario, Unspecified [Domain]</link:label>
    <link:label id="lab_us-gaap_ScenarioUnspecifiedDomain_DDFA78DDC5B550B3924A5B4F07F9E7C9_label_en-US" xlink:label="lab_us-gaap_ScenarioUnspecifiedDomain_DDFA78DDC5B550B3924A5B4F07F9E7C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Scenario, Unspecified [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_DDFA78DDC5B550B3924A5B4F07F9E7C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_DDFA78DDC5B550B3924A5B4F07F9E7C9" xlink:to="lab_us-gaap_ScenarioUnspecifiedDomain_DDFA78DDC5B550B3924A5B4F07F9E7C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_CF74B651F28E6C6FCA555B4F07F90003_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_CF74B651F28E6C6FCA555B4F07F90003" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net unrealized holding gain (loss) from available for sale securities arising during the period, tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_CF74B651F28E6C6FCA555B4F07F90003_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_CF74B651F28E6C6FCA555B4F07F90003" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_CF74B651F28E6C6FCA555B4F07F90003" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_CF74B651F28E6C6FCA555B4F07F90003" xlink:to="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_CF74B651F28E6C6FCA555B4F07F90003" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_D9216587E0FA3816570A5B4F07F966F5_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_D9216587E0FA3816570A5B4F07F966F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification adjustment of net gain from sale of available for sale securities included in income, tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_D9216587E0FA3816570A5B4F07F966F5_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_D9216587E0FA3816570A5B4F07F966F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_D9216587E0FA3816570A5B4F07F966F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_D9216587E0FA3816570A5B4F07F966F5" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_D9216587E0FA3816570A5B4F07F966F5" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_0FA50CDF001EF95F69545B4F07F965E4_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_0FA50CDF001EF95F69545B4F07F965E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_0FA50CDF001EF95F69545B4F07F965E4_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_0FA50CDF001EF95F69545B4F07F965E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_0FA50CDF001EF95F69545B4F07F965E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_0FA50CDF001EF95F69545B4F07F965E4" xlink:to="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax_0FA50CDF001EF95F69545B4F07F965E4" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_01CCE1674A44B32879F85B4F07F97C23_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_01CCE1674A44B32879F85B4F07F97C23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_01CCE1674A44B32879F85B4F07F97C23_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_01CCE1674A44B32879F85B4F07F97C23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_01CCE1674A44B32879F85B4F07F97C23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_01CCE1674A44B32879F85B4F07F97C23" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax_01CCE1674A44B32879F85B4F07F97C23" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_C39D17A0101C657960095B4F0A596B6D_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_C39D17A0101C657960095B4F0A596B6D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_C39D17A0101C657960095B4F0A596B6D_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_C39D17A0101C657960095B4F0A596B6D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_C39D17A0101C657960095B4F0A596B6D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_C39D17A0101C657960095B4F0A596B6D" xlink:to="lab_us-gaap_ScheduleOfEarningsPerShareBasicByCommonClassTable_C39D17A0101C657960095B4F0A596B6D" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementClassOfStockAxis_574F2C50DE99B3FE44F65B4F0A5929D5_terseLabel_en-US" xlink:label="lab_us-gaap_StatementClassOfStockAxis_574F2C50DE99B3FE44F65B4F0A5929D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Stock [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementClassOfStockAxis_574F2C50DE99B3FE44F65B4F0A5929D5_label_en-US" xlink:label="lab_us-gaap_StatementClassOfStockAxis_574F2C50DE99B3FE44F65B4F0A5929D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Stock [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_574F2C50DE99B3FE44F65B4F0A5929D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementClassOfStockAxis_574F2C50DE99B3FE44F65B4F0A5929D5" xlink:to="lab_us-gaap_StatementClassOfStockAxis_574F2C50DE99B3FE44F65B4F0A5929D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ClassOfStockDomain_E1011FDF99C6325ACB6A5B4F0A5972D6_terseLabel_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain_E1011FDF99C6325ACB6A5B4F0A5972D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Stock [Domain]</link:label>
    <link:label id="lab_us-gaap_ClassOfStockDomain_E1011FDF99C6325ACB6A5B4F0A5972D6_label_en-US" xlink:label="lab_us-gaap_ClassOfStockDomain_E1011FDF99C6325ACB6A5B4F0A5972D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Stock [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_E1011FDF99C6325ACB6A5B4F0A5972D6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassOfStockDomain_E1011FDF99C6325ACB6A5B4F0A5972D6" xlink:to="lab_us-gaap_ClassOfStockDomain_E1011FDF99C6325ACB6A5B4F0A5972D6" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareBasicLineItems_E34972AE170A07640FD15B4F0A594471_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicLineItems_E34972AE170A07640FD15B4F0A594471" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasicLineItems_E34972AE170A07640FD15B4F0A594471_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasicLineItems_E34972AE170A07640FD15B4F0A594471" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareBasicLineItems" xlink:label="loc_us-gaap_EarningsPerShareBasicLineItems_E34972AE170A07640FD15B4F0A594471" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasicLineItems_E34972AE170A07640FD15B4F0A594471" xlink:to="lab_us-gaap_EarningsPerShareBasicLineItems_E34972AE170A07640FD15B4F0A594471" xlink:type="arc" />
    <link:label id="lab_colb_BasicEarningsAllocatedToCommonShareholders_0855A0BB6FCB5FDFEFEA5B4F0A5949EB_terseLabel_en-US" xlink:label="lab_colb_BasicEarningsAllocatedToCommonShareholders_0855A0BB6FCB5FDFEFEA5B4F0A5949EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basic earnings allocated to common shareholders</link:label>
    <link:label id="lab_colb_BasicEarningsAllocatedToCommonShareholders_0855A0BB6FCB5FDFEFEA5B4F0A5949EB_label_en-US" xlink:label="lab_colb_BasicEarningsAllocatedToCommonShareholders_0855A0BB6FCB5FDFEFEA5B4F0A5949EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Basic earnings allocated to common shareholders</link:label>
    <link:label id="lab_colb_BasicEarningsAllocatedToCommonShareholders_0855A0BB6FCB5FDFEFEA5B4F0A5949EB_documentation_en-US" xlink:label="lab_colb_BasicEarningsAllocatedToCommonShareholders_0855A0BB6FCB5FDFEFEA5B4F0A5949EB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Basic earnings allocated to common shareholders</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BasicEarningsAllocatedToCommonShareholders" xlink:label="loc_colb_BasicEarningsAllocatedToCommonShareholders_0855A0BB6FCB5FDFEFEA5B4F0A5949EB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BasicEarningsAllocatedToCommonShareholders_0855A0BB6FCB5FDFEFEA5B4F0A5949EB" xlink:to="lab_colb_BasicEarningsAllocatedToCommonShareholders_0855A0BB6FCB5FDFEFEA5B4F0A5949EB" xlink:type="arc" />
    <link:label id="lab_colb_Earningsallocatedtoparticipatingsecuritiespreferredshares_7382153A6917A6D0BB375B4F0A692D40_terseLabel_en-US" xlink:label="lab_colb_Earningsallocatedtoparticipatingsecuritiespreferredshares_7382153A6917A6D0BB375B4F0A692D40" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings allocated to participating securities - preferred shares</link:label>
    <link:label id="lab_colb_Earningsallocatedtoparticipatingsecuritiespreferredshares_7382153A6917A6D0BB375B4F0A692D40_label_en-US" xlink:label="lab_colb_Earningsallocatedtoparticipatingsecuritiespreferredshares_7382153A6917A6D0BB375B4F0A692D40" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings allocated to participating securities - preferred shares</link:label>
    <link:label id="lab_colb_Earningsallocatedtoparticipatingsecuritiespreferredshares_7382153A6917A6D0BB375B4F0A692D40_documentation_en-US" xlink:label="lab_colb_Earningsallocatedtoparticipatingsecuritiespreferredshares_7382153A6917A6D0BB375B4F0A692D40" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Earnings allocated to participating securities - preferred shares</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Earningsallocatedtoparticipatingsecuritiespreferredshares" xlink:label="loc_colb_Earningsallocatedtoparticipatingsecuritiespreferredshares_7382153A6917A6D0BB375B4F0A692D40" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Earningsallocatedtoparticipatingsecuritiespreferredshares_7382153A6917A6D0BB375B4F0A692D40" xlink:to="lab_colb_Earningsallocatedtoparticipatingsecuritiespreferredshares_7382153A6917A6D0BB375B4F0A692D40" xlink:type="arc" />
    <link:label id="lab_colb_Earningsallocatedtoparticipatingsecuritiesnonvestedrestrictedshares_CFDDAE5511B826BE0C3B5B4F0A69B74F_terseLabel_en-US" xlink:label="lab_colb_Earningsallocatedtoparticipatingsecuritiesnonvestedrestrictedshares_CFDDAE5511B826BE0C3B5B4F0A69B74F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings allocated to participating securities - nonvested restricted shares</link:label>
    <link:label id="lab_colb_Earningsallocatedtoparticipatingsecuritiesnonvestedrestrictedshares_CFDDAE5511B826BE0C3B5B4F0A69B74F_label_en-US" xlink:label="lab_colb_Earningsallocatedtoparticipatingsecuritiesnonvestedrestrictedshares_CFDDAE5511B826BE0C3B5B4F0A69B74F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings allocated to participating securities - nonvested restricted shares</link:label>
    <link:label id="lab_colb_Earningsallocatedtoparticipatingsecuritiesnonvestedrestrictedshares_CFDDAE5511B826BE0C3B5B4F0A69B74F_documentation_en-US" xlink:label="lab_colb_Earningsallocatedtoparticipatingsecuritiesnonvestedrestrictedshares_CFDDAE5511B826BE0C3B5B4F0A69B74F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Earnings allocated to participating securities - nonvested restricted shares</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Earningsallocatedtoparticipatingsecuritiesnonvestedrestrictedshares" xlink:label="loc_colb_Earningsallocatedtoparticipatingsecuritiesnonvestedrestrictedshares_CFDDAE5511B826BE0C3B5B4F0A69B74F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Earningsallocatedtoparticipatingsecuritiesnonvestedrestrictedshares_CFDDAE5511B826BE0C3B5B4F0A69B74F" xlink:to="lab_colb_Earningsallocatedtoparticipatingsecuritiesnonvestedrestrictedshares_CFDDAE5511B826BE0C3B5B4F0A69B74F" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_99EBB7E9AD0016BE02075B4F0A699717_verboseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_99EBB7E9AD0016BE02075B4F0A699717" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Weighted average common shares outstanding</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_99EBB7E9AD0016BE02075B4F0A699717_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_99EBB7E9AD0016BE02075B4F0A699717" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_99EBB7E9AD0016BE02075B4F0A699717" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_99EBB7E9AD0016BE02075B4F0A699717" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_99EBB7E9AD0016BE02075B4F0A699717" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareBasic_06C739197EB3301971725B4F0A6999E9_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic_06C739197EB3301971725B4F0A6999E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basic earnings per common share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_06C739197EB3301971725B4F0A6999E9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasic_06C739197EB3301971725B4F0A6999E9" xlink:to="lab_us-gaap_EarningsPerShareBasic_06C739197EB3301971725B4F0A6999E9" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_3A91FC3BAE20154423E15B4F0A69A1DA_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_3A91FC3BAE20154423E15B4F0A69A1DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings allocated to common shareholders, Diluted</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_3A91FC3BAE20154423E15B4F0A69A1DA_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_3A91FC3BAE20154423E15B4F0A69A1DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Available to Common Stockholders, Diluted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_3A91FC3BAE20154423E15B4F0A69A1DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_3A91FC3BAE20154423E15B4F0A69A1DA" xlink:to="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_3A91FC3BAE20154423E15B4F0A69A1DA" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1FF44DFA77B657D590845B4F0A69FD3B_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1FF44DFA77B657D590845B4F0A69FD3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average number of common shares outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1FF44DFA77B657D590845B4F0A69FD3B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1FF44DFA77B657D590845B4F0A69FD3B" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_1FF44DFA77B657D590845B4F0A69FD3B" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_B27D4E527C27C092199C5B4F0A69D9AC_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_B27D4E527C27C092199C5B4F0A69D9AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dilutive effect of equity awards and warrants</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_B27D4E527C27C092199C5B4F0A69D9AC_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_B27D4E527C27C092199C5B4F0A69D9AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number Diluted Shares Outstanding Adjustment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_B27D4E527C27C092199C5B4F0A69D9AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_B27D4E527C27C092199C5B4F0A69D9AC" xlink:to="lab_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_B27D4E527C27C092199C5B4F0A69D9AC" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_75563A75386AD9F8D8015B4F0A69CB58_verboseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_75563A75386AD9F8D8015B4F0A69CB58" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Weighted average diluted common shares outstanding</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_75563A75386AD9F8D8015B4F0A69CB58_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_75563A75386AD9F8D8015B4F0A69CB58" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Diluted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_75563A75386AD9F8D8015B4F0A69CB58" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_75563A75386AD9F8D8015B4F0A69CB58" xlink:to="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_75563A75386AD9F8D8015B4F0A69CB58" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_05CBAF8D73FBE92E18EF5B4F0A692CDE_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted_05CBAF8D73FBE92E18EF5B4F0A692CDE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diluted earnings per common share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_05CBAF8D73FBE92E18EF5B4F0A692CDE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareDiluted_05CBAF8D73FBE92E18EF5B4F0A692CDE" xlink:to="lab_us-gaap_EarningsPerShareDiluted_05CBAF8D73FBE92E18EF5B4F0A692CDE" xlink:type="arc" />
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8CBC1D522FB1CA4910015B4F0A69DE96_terseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8CBC1D522FB1CA4910015B4F0A69DE96" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive.</link:label>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8CBC1D522FB1CA4910015B4F0A69DE96_label_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8CBC1D522FB1CA4910015B4F0A69DE96" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8CBC1D522FB1CA4910015B4F0A69DE96" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8CBC1D522FB1CA4910015B4F0A69DE96" xlink:to="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_8CBC1D522FB1CA4910015B4F0A69DE96" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTable_F9EA5A1604DFDCEE0A550C308562CD23_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTable_F9EA5A1604DFDCEE0A550C308562CD23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Table]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTable_F9EA5A1604DFDCEE0A550C308562CD23_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTable_F9EA5A1604DFDCEE0A550C308562CD23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_F9EA5A1604DFDCEE0A550C308562CD23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTable_F9EA5A1604DFDCEE0A550C308562CD23" xlink:to="lab_us-gaap_SubsequentEventTable_F9EA5A1604DFDCEE0A550C308562CD23" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_A17AA39BAC67F21DFC110C3085657660_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis_A17AA39BAC67F21DFC110C3085657660" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_A17AA39BAC67F21DFC110C3085657660_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis_A17AA39BAC67F21DFC110C3085657660" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_A17AA39BAC67F21DFC110C3085657660" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_A17AA39BAC67F21DFC110C3085657660" xlink:to="lab_us-gaap_SubsequentEventTypeAxis_A17AA39BAC67F21DFC110C3085657660" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_DBAFA11A4C05905A8E060C30856556D3_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain_DBAFA11A4C05905A8E060C30856556D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_DBAFA11A4C05905A8E060C30856556D3_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain_DBAFA11A4C05905A8E060C30856556D3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_DBAFA11A4C05905A8E060C30856556D3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_DBAFA11A4C05905A8E060C30856556D3" xlink:to="lab_us-gaap_SubsequentEventTypeDomain_DBAFA11A4C05905A8E060C30856556D3" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventMember_3731733C8E1EBC051A450C308565AC59_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventMember_3731733C8E1EBC051A450C308565AC59" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventMember_3731733C8E1EBC051A450C308565AC59_label_en-US" xlink:label="lab_us-gaap_SubsequentEventMember_3731733C8E1EBC051A450C308565AC59" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_3731733C8E1EBC051A450C308565AC59" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventMember_3731733C8E1EBC051A450C308565AC59" xlink:to="lab_us-gaap_SubsequentEventMember_3731733C8E1EBC051A450C308565AC59" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventLineItems_72C7F3662C443569F59C0C308566AAA4_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems_72C7F3662C443569F59C0C308566AAA4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Event [Line Items]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventLineItems_72C7F3662C443569F59C0C308566AAA4_label_en-US" xlink:label="lab_us-gaap_SubsequentEventLineItems_72C7F3662C443569F59C0C308566AAA4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subsequent Event [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_72C7F3662C443569F59C0C308566AAA4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventLineItems_72C7F3662C443569F59C0C308566AAA4" xlink:to="lab_us-gaap_SubsequentEventLineItems_72C7F3662C443569F59C0C308566AAA4" xlink:type="arc" />
    <link:label id="lab_invest_DerivativeNotionalAmount_91D69BC3CF95E27E7D1C0C30856647B5_terseLabel_en-US" xlink:label="lab_invest_DerivativeNotionalAmount_91D69BC3CF95E27E7D1C0C30856647B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative, Notional Amount</link:label>
    <link:label id="lab_invest_DerivativeNotionalAmount_91D69BC3CF95E27E7D1C0C30856647B5_label_en-US" xlink:label="lab_invest_DerivativeNotionalAmount_91D69BC3CF95E27E7D1C0C30856647B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Notional Amount</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_91D69BC3CF95E27E7D1C0C30856647B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_DerivativeNotionalAmount_91D69BC3CF95E27E7D1C0C30856647B5" xlink:to="lab_invest_DerivativeNotionalAmount_91D69BC3CF95E27E7D1C0C30856647B5" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_8EBDBF002B50F9A88EFF0C30E67ECE39_terseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_8EBDBF002B50F9A88EFF0C30E67ECE39" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Repurchase Program, Number of Shares Authorized to be Repurchased</link:label>
    <link:label id="lab_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_8EBDBF002B50F9A88EFF0C30E67ECE39_label_en-US" xlink:label="lab_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_8EBDBF002B50F9A88EFF0C30E67ECE39" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Repurchase Program, Number of Shares Authorized to be Repurchased</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased" xlink:label="loc_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_8EBDBF002B50F9A88EFF0C30E67ECE39" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_8EBDBF002B50F9A88EFF0C30E67ECE39" xlink:to="lab_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_8EBDBF002B50F9A88EFF0C30E67ECE39" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockRepurchaseProgramAuthorizedAmount1_463A16DAD3546A0614F00C36196049C8_terseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchaseProgramAuthorizedAmount1_463A16DAD3546A0614F00C36196049C8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Repurchase Program, Authorized Amount</link:label>
    <link:label id="lab_us-gaap_StockRepurchaseProgramAuthorizedAmount1_463A16DAD3546A0614F00C36196049C8_label_en-US" xlink:label="lab_us-gaap_StockRepurchaseProgramAuthorizedAmount1_463A16DAD3546A0614F00C36196049C8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Repurchase Program, Authorized Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_463A16DAD3546A0614F00C36196049C8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_463A16DAD3546A0614F00C36196049C8" xlink:to="lab_us-gaap_StockRepurchaseProgramAuthorizedAmount1_463A16DAD3546A0614F00C36196049C8" xlink:type="arc" />
    <link:label id="lab_colb_LoansAnalysisofPurchasedCreditImpairedLoansAccretableYieldRollforwardAbstract_37571DF452D0F036D96F5B4F075DB5AB_label_en-US" xlink:label="lab_colb_LoansAnalysisofPurchasedCreditImpairedLoansAccretableYieldRollforwardAbstract_37571DF452D0F036D96F5B4F075DB5AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans, Analysis of Purchased Credit Impaired Loans, Accretable Yield Rollforward [Abstract]</link:label>
    <link:label id="lab_colb_LoansAnalysisofPurchasedCreditImpairedLoansAccretableYieldRollforwardAbstract_37571DF452D0F036D96F5B4F075DB5AB_documentation_en-US" xlink:label="lab_colb_LoansAnalysisofPurchasedCreditImpairedLoansAccretableYieldRollforwardAbstract_37571DF452D0F036D96F5B4F075DB5AB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans, Analysis of Purchased Credit Impaired Loans, Accretable Yield Rollforward [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoansAnalysisofPurchasedCreditImpairedLoansAccretableYieldRollforwardAbstract" xlink:label="loc_colb_LoansAnalysisofPurchasedCreditImpairedLoansAccretableYieldRollforwardAbstract_37571DF452D0F036D96F5B4F075DB5AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoansAnalysisofPurchasedCreditImpairedLoansAccretableYieldRollforwardAbstract_37571DF452D0F036D96F5B4F075DB5AB" xlink:to="lab_colb_LoansAnalysisofPurchasedCreditImpairedLoansAccretableYieldRollforwardAbstract_37571DF452D0F036D96F5B4F075DB5AB" xlink:type="arc" />
    <link:label id="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_95E35EED4E8DCD610B265B4F075DB81B_terseLabel_en-US" xlink:label="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_95E35EED4E8DCD610B265B4F075DB81B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield</link:label>
    <link:label id="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_95E35EED4E8DCD610B265B4F075DB81B_label_en-US" xlink:label="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_95E35EED4E8DCD610B265B4F075DB81B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield" xlink:label="loc_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_95E35EED4E8DCD610B265B4F075DB81B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_95E35EED4E8DCD610B265B4F075DB81B" xlink:to="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYield_95E35EED4E8DCD610B265B4F075DB81B" xlink:type="arc" />
    <link:label id="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion_F3705941E90362688F215B4F075D7DED_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion_F3705941E90362688F215B4F075D7DED" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion</link:label>
    <link:label id="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion_F3705941E90362688F215B4F075D7DED_label_en-US" xlink:label="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion_F3705941E90362688F215B4F075D7DED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion" xlink:label="loc_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion_F3705941E90362688F215B4F075D7DED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion_F3705941E90362688F215B4F075D7DED" xlink:to="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretion_F3705941E90362688F215B4F075D7DED" xlink:type="arc" />
    <link:label id="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans_4696A7381EBBB9C966205B4F075D3D50_terseLabel_en-US" xlink:label="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans_4696A7381EBBB9C966205B4F075D3D50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans</link:label>
    <link:label id="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans_4696A7381EBBB9C966205B4F075D3D50_label_en-US" xlink:label="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans_4696A7381EBBB9C966205B4F075D3D50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans" xlink:label="loc_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans_4696A7381EBBB9C966205B4F075D3D50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans_4696A7381EBBB9C966205B4F075D3D50" xlink:to="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans_4696A7381EBBB9C966205B4F075D3D50" xlink:type="arc" />
    <link:label id="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference_C39D0B82373F286CE1DC5B4F075D0A3E_terseLabel_en-US" xlink:label="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference_C39D0B82373F286CE1DC5B4F075D0A3E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference</link:label>
    <link:label id="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference_C39D0B82373F286CE1DC5B4F075D0A3E_label_en-US" xlink:label="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference_C39D0B82373F286CE1DC5B4F075D0A3E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications (to) from Nonaccretable Difference</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference" xlink:label="loc_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference_C39D0B82373F286CE1DC5B4F075D0A3E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference_C39D0B82373F286CE1DC5B4F075D0A3E" xlink:to="lab_us-gaap_CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldReclassificationsToFromNonaccretableDifference_C39D0B82373F286CE1DC5B4F075D0A3E" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis_EFE6AF6B55D9E1D4ABBD06BF5731821C_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis_EFE6AF6B55D9E1D4ABBD06BF5731821C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repurchase Agreements and Similar Transactions, Maturity Periods [Axis]</link:label>
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis_EFE6AF6B55D9E1D4ABBD06BF5731821C_label_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis_EFE6AF6B55D9E1D4ABBD06BF5731821C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repurchase Agreements and Similar Transactions, Maturity Periods [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis" xlink:label="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis_EFE6AF6B55D9E1D4ABBD06BF5731821C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis_EFE6AF6B55D9E1D4ABBD06BF5731821C" xlink:to="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis_EFE6AF6B55D9E1D4ABBD06BF5731821C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodDomain_51558C8D7B8CCCA5EEF806BF5731EF8C_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodDomain_51558C8D7B8CCCA5EEF806BF5731EF8C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repurchase Agreements and Similar Transactions, Maturity Periods [Domain]</link:label>
    <link:label id="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodDomain_51558C8D7B8CCCA5EEF806BF5731EF8C_label_en-US" xlink:label="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodDomain_51558C8D7B8CCCA5EEF806BF5731EF8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repurchase Agreements and Similar Transactions, Maturity Periods [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodDomain" xlink:label="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodDomain_51558C8D7B8CCCA5EEF806BF5731EF8C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodDomain_51558C8D7B8CCCA5EEF806BF5731EF8C" xlink:to="lab_us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodDomain_51558C8D7B8CCCA5EEF806BF5731EF8C" xlink:type="arc" />
    <link:label id="lab_us-gaap_MaturityOvernightMember_00A525D01DCC58AFF1FE06BF5731D2E4_terseLabel_en-US" xlink:label="lab_us-gaap_MaturityOvernightMember_00A525D01DCC58AFF1FE06BF5731D2E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maturity Overnight [Member]</link:label>
    <link:label id="lab_us-gaap_MaturityOvernightMember_00A525D01DCC58AFF1FE06BF5731D2E4_label_en-US" xlink:label="lab_us-gaap_MaturityOvernightMember_00A525D01DCC58AFF1FE06BF5731D2E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maturity Overnight [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MaturityOvernightMember" xlink:label="loc_us-gaap_MaturityOvernightMember_00A525D01DCC58AFF1FE06BF5731D2E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MaturityOvernightMember_00A525D01DCC58AFF1FE06BF5731D2E4" xlink:to="lab_us-gaap_MaturityOvernightMember_00A525D01DCC58AFF1FE06BF5731D2E4" xlink:type="arc" />
    <link:label id="lab_us-gaap_MaturityUpTo30DaysMember_6330079A6C62DF49576A06BF5731366F_terseLabel_en-US" xlink:label="lab_us-gaap_MaturityUpTo30DaysMember_6330079A6C62DF49576A06BF5731366F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maturity Less than 30 Days [Member]</link:label>
    <link:label id="lab_us-gaap_MaturityUpTo30DaysMember_6330079A6C62DF49576A06BF5731366F_label_en-US" xlink:label="lab_us-gaap_MaturityUpTo30DaysMember_6330079A6C62DF49576A06BF5731366F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maturity Less than 30 Days [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MaturityUpTo30DaysMember" xlink:label="loc_us-gaap_MaturityUpTo30DaysMember_6330079A6C62DF49576A06BF5731366F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MaturityUpTo30DaysMember_6330079A6C62DF49576A06BF5731366F" xlink:to="lab_us-gaap_MaturityUpTo30DaysMember_6330079A6C62DF49576A06BF5731366F" xlink:type="arc" />
    <link:label id="lab_us-gaap_Maturity30To90DaysMember_BA4A3B9D014EEBE0AEB506BF573190EF_terseLabel_en-US" xlink:label="lab_us-gaap_Maturity30To90DaysMember_BA4A3B9D014EEBE0AEB506BF573190EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maturity 30 to 90 Days [Member]</link:label>
    <link:label id="lab_us-gaap_Maturity30To90DaysMember_BA4A3B9D014EEBE0AEB506BF573190EF_label_en-US" xlink:label="lab_us-gaap_Maturity30To90DaysMember_BA4A3B9D014EEBE0AEB506BF573190EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maturity 30 to 90 Days [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Maturity30To90DaysMember" xlink:label="loc_us-gaap_Maturity30To90DaysMember_BA4A3B9D014EEBE0AEB506BF573190EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Maturity30To90DaysMember_BA4A3B9D014EEBE0AEB506BF573190EF" xlink:to="lab_us-gaap_Maturity30To90DaysMember_BA4A3B9D014EEBE0AEB506BF573190EF" xlink:type="arc" />
    <link:label id="lab_us-gaap_MaturityOver90DaysMember_E2E39A00D7C1C6D89CBB06BF57311280_terseLabel_en-US" xlink:label="lab_us-gaap_MaturityOver90DaysMember_E2E39A00D7C1C6D89CBB06BF57311280" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maturity Greater than 90 Days [Member]</link:label>
    <link:label id="lab_us-gaap_MaturityOver90DaysMember_E2E39A00D7C1C6D89CBB06BF57311280_label_en-US" xlink:label="lab_us-gaap_MaturityOver90DaysMember_E2E39A00D7C1C6D89CBB06BF57311280" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maturity Greater than 90 Days [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MaturityOver90DaysMember" xlink:label="loc_us-gaap_MaturityOver90DaysMember_E2E39A00D7C1C6D89CBB06BF57311280" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MaturityOver90DaysMember_E2E39A00D7C1C6D89CBB06BF57311280" xlink:to="lab_us-gaap_MaturityOver90DaysMember_E2E39A00D7C1C6D89CBB06BF57311280" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_F2BCACB6B0F160453BEF06BF5731EDC4_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_F2BCACB6B0F160453BEF06BF5731EDC4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement Location [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_F2BCACB6B0F160453BEF06BF5731EDC4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_F2BCACB6B0F160453BEF06BF5731EDC4" xlink:to="lab_us-gaap_IncomeStatementLocationAxis_F2BCACB6B0F160453BEF06BF5731EDC4" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementLocationDomain_A9E233C4F25ACF8593EC06BF5731DBBF_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_A9E233C4F25ACF8593EC06BF5731DBBF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement Location [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_A9E233C4F25ACF8593EC06BF5731DBBF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_A9E233C4F25ACF8593EC06BF5731DBBF" xlink:to="lab_us-gaap_IncomeStatementLocationDomain_A9E233C4F25ACF8593EC06BF5731DBBF" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_6E02E3275485ED1753D806BF5731CF10_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_6E02E3275485ED1753D806BF5731CF10" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Derivative Instruments, Net, Pretax</link:label>
    <link:label id="lab_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_6E02E3275485ED1753D806BF5731CF10_label_en-US" xlink:label="lab_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_6E02E3275485ED1753D806BF5731CF10" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Derivative Instruments, Net, Pretax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:label="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_6E02E3275485ED1753D806BF5731CF10" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_6E02E3275485ED1753D806BF5731CF10" xlink:to="lab_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_6E02E3275485ED1753D806BF5731CF10" xlink:type="arc" />
    <link:label id="lab_us-gaap_SecuredBorrowingsGrossDifferenceAmount_C6DAB88C40499BD1E8EA06BF57310CEF_terseLabel_en-US" xlink:label="lab_us-gaap_SecuredBorrowingsGrossDifferenceAmount_C6DAB88C40499BD1E8EA06BF57310CEF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Secured Borrowings, Gross, Difference, Amount</link:label>
    <link:label id="lab_us-gaap_SecuredBorrowingsGrossDifferenceAmount_C6DAB88C40499BD1E8EA06BF57310CEF_label_en-US" xlink:label="lab_us-gaap_SecuredBorrowingsGrossDifferenceAmount_C6DAB88C40499BD1E8EA06BF57310CEF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Secured Borrowings, Gross, Difference, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuredBorrowingsGrossDifferenceAmount" xlink:label="loc_us-gaap_SecuredBorrowingsGrossDifferenceAmount_C6DAB88C40499BD1E8EA06BF57310CEF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuredBorrowingsGrossDifferenceAmount_C6DAB88C40499BD1E8EA06BF57310CEF" xlink:to="lab_us-gaap_SecuredBorrowingsGrossDifferenceAmount_C6DAB88C40499BD1E8EA06BF57310CEF" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_0958783E849EDD1C168B07590D484BC6_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_0958783E849EDD1C168B07590D484BC6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings Per Common Share</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_0958783E849EDD1C168B07590D484BC6_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_0958783E849EDD1C168B07590D484BC6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_0958783E849EDD1C168B07590D484BC6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareTextBlock_0958783E849EDD1C168B07590D484BC6" xlink:to="lab_us-gaap_EarningsPerShareTextBlock_0958783E849EDD1C168B07590D484BC6" xlink:type="arc" />
    <link:label id="lab_us-gaap_RegulatoryCapitalRequirementsAbstract_F365A115078A4A9D3D625B4F0AB7757B_label_en-US" xlink:label="lab_us-gaap_RegulatoryCapitalRequirementsAbstract_F365A115078A4A9D3D625B4F0AB7757B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Regulatory Capital Requirements [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryCapitalRequirementsAbstract" xlink:label="loc_us-gaap_RegulatoryCapitalRequirementsAbstract_F365A115078A4A9D3D625B4F0AB7757B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryCapitalRequirementsAbstract_F365A115078A4A9D3D625B4F0AB7757B" xlink:to="lab_us-gaap_RegulatoryCapitalRequirementsAbstract_F365A115078A4A9D3D625B4F0AB7757B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTable_66C17F2E3D0FE5FB51D35B4F0AB769FF_label_en-US" xlink:label="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTable_66C17F2E3D0FE5FB51D35B4F0AB769FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTable" xlink:label="loc_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTable_66C17F2E3D0FE5FB51D35B4F0AB769FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTable_66C17F2E3D0FE5FB51D35B4F0AB769FF" xlink:to="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTable_66C17F2E3D0FE5FB51D35B4F0AB769FF" xlink:type="arc" />
    <link:label id="lab_dei_LegalEntityAxis_A71507D6A56A769939E25B4F0AC68542_label_en-US" xlink:label="lab_dei_LegalEntityAxis_A71507D6A56A769939E25B4F0AC68542" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_A71507D6A56A769939E25B4F0AC68542" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis_A71507D6A56A769939E25B4F0AC68542" xlink:to="lab_dei_LegalEntityAxis_A71507D6A56A769939E25B4F0AC68542" xlink:type="arc" />
    <link:label id="lab_dei_EntityDomain_8C81F00107E05E05FBC25B4F0AC699BA_label_en-US" xlink:label="lab_dei_EntityDomain_8C81F00107E05E05FBC25B4F0AC699BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_8C81F00107E05E05FBC25B4F0AC699BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain_8C81F00107E05E05FBC25B4F0AC699BA" xlink:to="lab_dei_EntityDomain_8C81F00107E05E05FBC25B4F0AC699BA" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems_26E154371994030290395B4F0AC60639_label_en-US" xlink:label="lab_us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems_26E154371994030290395B4F0AC60639" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems" xlink:label="loc_us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems_26E154371994030290395B4F0AC60639" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems_26E154371994030290395B4F0AC60639" xlink:to="lab_us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems_26E154371994030290395B4F0AC60639" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonEquityTierOneCapital_AA60B927B2B3E4C4FD4B5B4F0AC62BF8_terseLabel_en-US" xlink:label="lab_us-gaap_CommonEquityTierOneCapital_AA60B927B2B3E4C4FD4B5B4F0AC62BF8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Capital</link:label>
    <link:label id="lab_us-gaap_CommonEquityTierOneCapital_AA60B927B2B3E4C4FD4B5B4F0AC62BF8_label_en-US" xlink:label="lab_us-gaap_CommonEquityTierOneCapital_AA60B927B2B3E4C4FD4B5B4F0AC62BF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonEquityTierOneCapital" xlink:label="loc_us-gaap_CommonEquityTierOneCapital_AA60B927B2B3E4C4FD4B5B4F0AC62BF8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonEquityTierOneCapital_AA60B927B2B3E4C4FD4B5B4F0AC62BF8" xlink:to="lab_us-gaap_CommonEquityTierOneCapital_AA60B927B2B3E4C4FD4B5B4F0AC62BF8" xlink:type="arc" />
    <link:label id="lab_colb_CapitalConservationBuffer_65679C7BCEA1328292565B4F0AC6EEFE_terseLabel_en-US" xlink:label="lab_colb_CapitalConservationBuffer_65679C7BCEA1328292565B4F0AC6EEFE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Conservation Buffer</link:label>
    <link:label id="lab_colb_CapitalConservationBuffer_65679C7BCEA1328292565B4F0AC6EEFE_label_en-US" xlink:label="lab_colb_CapitalConservationBuffer_65679C7BCEA1328292565B4F0AC6EEFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Conservation Buffer</link:label>
    <link:label id="lab_colb_CapitalConservationBuffer_65679C7BCEA1328292565B4F0AC6EEFE_documentation_en-US" xlink:label="lab_colb_CapitalConservationBuffer_65679C7BCEA1328292565B4F0AC6EEFE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capital Conservation Buffer</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CapitalConservationBuffer" xlink:label="loc_colb_CapitalConservationBuffer_65679C7BCEA1328292565B4F0AC6EEFE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CapitalConservationBuffer_65679C7BCEA1328292565B4F0AC6EEFE" xlink:to="lab_colb_CapitalConservationBuffer_65679C7BCEA1328292565B4F0AC6EEFE" xlink:type="arc" />
    <link:label id="lab_colb_CommonEquityTier1CapitaltoRiskWeightedAssets_41C48B7BDBBDF441ADC05B4F0AC6139E_terseLabel_en-US" xlink:label="lab_colb_CommonEquityTier1CapitaltoRiskWeightedAssets_41C48B7BDBBDF441ADC05B4F0AC6139E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Capital to Risk Weighted Assets</link:label>
    <link:label id="lab_colb_CommonEquityTier1CapitaltoRiskWeightedAssets_41C48B7BDBBDF441ADC05B4F0AC6139E_label_en-US" xlink:label="lab_colb_CommonEquityTier1CapitaltoRiskWeightedAssets_41C48B7BDBBDF441ADC05B4F0AC6139E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Capital to Risk Weighted Assets</link:label>
    <link:label id="lab_colb_CommonEquityTier1CapitaltoRiskWeightedAssets_41C48B7BDBBDF441ADC05B4F0AC6139E_documentation_en-US" xlink:label="lab_colb_CommonEquityTier1CapitaltoRiskWeightedAssets_41C48B7BDBBDF441ADC05B4F0AC6139E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Capital divided by risk weighted assets as defined by regulations.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommonEquityTier1CapitaltoRiskWeightedAssets" xlink:label="loc_colb_CommonEquityTier1CapitaltoRiskWeightedAssets_41C48B7BDBBDF441ADC05B4F0AC6139E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommonEquityTier1CapitaltoRiskWeightedAssets_41C48B7BDBBDF441ADC05B4F0AC6139E" xlink:to="lab_colb_CommonEquityTier1CapitaltoRiskWeightedAssets_41C48B7BDBBDF441ADC05B4F0AC6139E" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy_CC757F700041219BE8D15B4F0AC6DFFB_terseLabel_en-US" xlink:label="lab_us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy_CC757F700041219BE8D15B4F0AC6DFFB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Capital Required for Capital Adequacy</link:label>
    <link:label id="lab_us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy_CC757F700041219BE8D15B4F0AC6DFFB_label_en-US" xlink:label="lab_us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy_CC757F700041219BE8D15B4F0AC6DFFB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Capital Required for Capital Adequacy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy" xlink:label="loc_us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy_CC757F700041219BE8D15B4F0AC6DFFB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy_CC757F700041219BE8D15B4F0AC6DFFB" xlink:to="lab_us-gaap_CommonEquityTierOneCapitalRequiredForCapitalAdequacy_CC757F700041219BE8D15B4F0AC6DFFB" xlink:type="arc" />
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssets_BDB9E7FC72C98879D88C5B4F0AC6D8D6_terseLabel_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssets_BDB9E7FC72C98879D88C5B4F0AC6D8D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets</link:label>
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssets_BDB9E7FC72C98879D88C5B4F0AC6D8D6_label_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssets_BDB9E7FC72C98879D88C5B4F0AC6D8D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets</link:label>
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssets_BDB9E7FC72C98879D88C5B4F0AC6D8D6_documentation_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssets_BDB9E7FC72C98879D88C5B4F0AC6D8D6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The minimum Common Equity Tier 1 Capital Ratio (Common Equity Tier 1 capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssets" xlink:label="loc_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssets_BDB9E7FC72C98879D88C5B4F0AC6D8D6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssets_BDB9E7FC72C98879D88C5B4F0AC6D8D6" xlink:to="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssets_BDB9E7FC72C98879D88C5B4F0AC6D8D6" xlink:type="arc" />
    <link:label id="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_875BCA60C009F941EA695B4F0AC6F641_terseLabel_en-US" xlink:label="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_875BCA60C009F941EA695B4F0AC6F641" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Capital Required for Capital Adequacy plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_875BCA60C009F941EA695B4F0AC6F641_label_en-US" xlink:label="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_875BCA60C009F941EA695B4F0AC6F641" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Capital Required for Capital Adequacy plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_875BCA60C009F941EA695B4F0AC6F641_documentation_en-US" xlink:label="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_875BCA60C009F941EA695B4F0AC6F641" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Capital Required for Capital Adequacy plus capital conservation buffer phase-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein" xlink:label="loc_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_875BCA60C009F941EA695B4F0AC6F641" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_875BCA60C009F941EA695B4F0AC6F641" xlink:to="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_875BCA60C009F941EA695B4F0AC6F641" xlink:type="arc" />
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_55EE52FB511F9BF301FC5B4F0AC6BD6F_terseLabel_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_55EE52FB511F9BF301FC5B4F0AC6BD6F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_55EE52FB511F9BF301FC5B4F0AC6BD6F_label_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_55EE52FB511F9BF301FC5B4F0AC6BD6F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_55EE52FB511F9BF301FC5B4F0AC6BD6F_documentation_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_55EE52FB511F9BF301FC5B4F0AC6BD6F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein" xlink:label="loc_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_55EE52FB511F9BF301FC5B4F0AC6BD6F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_55EE52FB511F9BF301FC5B4F0AC6BD6F" xlink:to="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_55EE52FB511F9BF301FC5B4F0AC6BD6F" xlink:type="arc" />
    <link:label id="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacyminimumrequiredplusfullyphasedincapitalconservationbuffer_E73B91537A264A57A4545B4F0AC6DA44_terseLabel_en-US" xlink:label="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacyminimumrequiredplusfullyphasedincapitalconservationbuffer_E73B91537A264A57A4545B4F0AC6DA44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Capital Required for Capital Adequacy - minimum required plus fully phased in capital conservation buffer</link:label>
    <link:label id="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacyminimumrequiredplusfullyphasedincapitalconservationbuffer_E73B91537A264A57A4545B4F0AC6DA44_label_en-US" xlink:label="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacyminimumrequiredplusfullyphasedincapitalconservationbuffer_E73B91537A264A57A4545B4F0AC6DA44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Capital Required for Capital Adequacy - minimum required plus fully phased in capital conservation buffer</link:label>
    <link:label id="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacyminimumrequiredplusfullyphasedincapitalconservationbuffer_E73B91537A264A57A4545B4F0AC6DA44_documentation_en-US" xlink:label="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacyminimumrequiredplusfullyphasedincapitalconservationbuffer_E73B91537A264A57A4545B4F0AC6DA44" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacyminimumrequiredplusfullyphasedincapitalconservationbuffer" xlink:label="loc_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacyminimumrequiredplusfullyphasedincapitalconservationbuffer_E73B91537A264A57A4545B4F0AC6DA44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacyminimumrequiredplusfullyphasedincapitalconservationbuffer_E73B91537A264A57A4545B4F0AC6DA44" xlink:to="lab_colb_CommonEquityTierOneCapitalRequiredforCapitalAdequacyminimumrequiredplusfullyphasedincapitalconservationbuffer_E73B91537A264A57A4545B4F0AC6DA44" xlink:type="arc" />
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_8B062BA239A103FEC2215B4F0AC6899A_terseLabel_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_8B062BA239A103FEC2215B4F0AC6899A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in</link:label>
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_8B062BA239A103FEC2215B4F0AC6899A_label_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_8B062BA239A103FEC2215B4F0AC6899A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in</link:label>
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_8B062BA239A103FEC2215B4F0AC6899A_documentation_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_8B062BA239A103FEC2215B4F0AC6899A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin" xlink:label="loc_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_8B062BA239A103FEC2215B4F0AC6899A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_8B062BA239A103FEC2215B4F0AC6899A" xlink:to="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_8B062BA239A103FEC2215B4F0AC6899A" xlink:type="arc" />
    <link:label id="lab_colb_CommonEquityTierOneRiskBasedCapitalRequiredtobeWellCapitalized_FC63D1C3909C865D37C45B4F0AC616CC_terseLabel_en-US" xlink:label="lab_colb_CommonEquityTierOneRiskBasedCapitalRequiredtobeWellCapitalized_FC63D1C3909C865D37C45B4F0AC616CC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Risk Based Capital Required to be Well Capitalized</link:label>
    <link:label id="lab_colb_CommonEquityTierOneRiskBasedCapitalRequiredtobeWellCapitalized_FC63D1C3909C865D37C45B4F0AC616CC_label_en-US" xlink:label="lab_colb_CommonEquityTierOneRiskBasedCapitalRequiredtobeWellCapitalized_FC63D1C3909C865D37C45B4F0AC616CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Equity Tier One Risk Based Capital Required to be Well Capitalized</link:label>
    <link:label id="lab_colb_CommonEquityTierOneRiskBasedCapitalRequiredtobeWellCapitalized_FC63D1C3909C865D37C45B4F0AC616CC_documentation_en-US" xlink:label="lab_colb_CommonEquityTierOneRiskBasedCapitalRequiredtobeWellCapitalized_FC63D1C3909C865D37C45B4F0AC616CC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of Common Equity Tier One Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommonEquityTierOneRiskBasedCapitalRequiredtobeWellCapitalized" xlink:label="loc_colb_CommonEquityTierOneRiskBasedCapitalRequiredtobeWellCapitalized_FC63D1C3909C865D37C45B4F0AC616CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommonEquityTierOneRiskBasedCapitalRequiredtobeWellCapitalized_FC63D1C3909C865D37C45B4F0AC616CC" xlink:to="lab_colb_CommonEquityTierOneRiskBasedCapitalRequiredtobeWellCapitalized_FC63D1C3909C865D37C45B4F0AC616CC" xlink:type="arc" />
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets_7153C906A78F7AE744C85B4F0AC674F9_terseLabel_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets_7153C906A78F7AE744C85B4F0AC674F9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets</link:label>
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets_7153C906A78F7AE744C85B4F0AC674F9_label_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets_7153C906A78F7AE744C85B4F0AC674F9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Equity Tier 1 Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets</link:label>
    <link:label id="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets_7153C906A78F7AE744C85B4F0AC674F9_documentation_en-US" xlink:label="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets_7153C906A78F7AE744C85B4F0AC674F9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Common Equity Tier 1 Capital ratio (CET1 divided by risk weighted assets) required to be categorized as well capitalized under the regulatory framework for prompt corrective action.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommonEquityTier1RiskBasedCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets" xlink:label="loc_colb_CommonEquityTier1RiskBasedCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets_7153C906A78F7AE744C85B4F0AC674F9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommonEquityTier1RiskBasedCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets_7153C906A78F7AE744C85B4F0AC674F9" xlink:to="lab_colb_CommonEquityTier1RiskBasedCapitalRequiredtobeWellCapitalizedtoRiskWeightedAssets_7153C906A78F7AE744C85B4F0AC674F9" xlink:type="arc" />
    <link:label id="lab_us-gaap_Capital_51A5B593E6EA15B82B6F5B4F0AC600D4_terseLabel_en-US" xlink:label="lab_us-gaap_Capital_51A5B593E6EA15B82B6F5B4F0AC600D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Capital, Actual Amount</link:label>
    <link:label id="lab_us-gaap_Capital_51A5B593E6EA15B82B6F5B4F0AC600D4_label_en-US" xlink:label="lab_us-gaap_Capital_51A5B593E6EA15B82B6F5B4F0AC600D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Capital" xlink:label="loc_us-gaap_Capital_51A5B593E6EA15B82B6F5B4F0AC600D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Capital_51A5B593E6EA15B82B6F5B4F0AC600D4" xlink:to="lab_us-gaap_Capital_51A5B593E6EA15B82B6F5B4F0AC600D4" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalToRiskWeightedAssets_1CC23E516BCEFB3CDE785B4F0AC60AA0_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalToRiskWeightedAssets_1CC23E516BCEFB3CDE785B4F0AC60AA0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Capital (to risk-weighted assets), Ratio</link:label>
    <link:label id="lab_us-gaap_CapitalToRiskWeightedAssets_1CC23E516BCEFB3CDE785B4F0AC60AA0_label_en-US" xlink:label="lab_us-gaap_CapitalToRiskWeightedAssets_1CC23E516BCEFB3CDE785B4F0AC60AA0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital to Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalToRiskWeightedAssets" xlink:label="loc_us-gaap_CapitalToRiskWeightedAssets_1CC23E516BCEFB3CDE785B4F0AC60AA0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalToRiskWeightedAssets_1CC23E516BCEFB3CDE785B4F0AC60AA0" xlink:to="lab_us-gaap_CapitalToRiskWeightedAssets_1CC23E516BCEFB3CDE785B4F0AC60AA0" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalRequiredForCapitalAdequacy_76BA0D55A99F230776765B4F0AC6F9DB_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalRequiredForCapitalAdequacy_76BA0D55A99F230776765B4F0AC6F9DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Capital For Capital Adequacy Purposes, Amount</link:label>
    <link:label id="lab_us-gaap_CapitalRequiredForCapitalAdequacy_76BA0D55A99F230776765B4F0AC6F9DB_label_en-US" xlink:label="lab_us-gaap_CapitalRequiredForCapitalAdequacy_76BA0D55A99F230776765B4F0AC6F9DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalRequiredForCapitalAdequacy" xlink:label="loc_us-gaap_CapitalRequiredForCapitalAdequacy_76BA0D55A99F230776765B4F0AC6F9DB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalRequiredForCapitalAdequacy_76BA0D55A99F230776765B4F0AC6F9DB" xlink:to="lab_us-gaap_CapitalRequiredForCapitalAdequacy_76BA0D55A99F230776765B4F0AC6F9DB" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_CCAF9CA7E8AF0FCFE82E5B4F0AC6DE4B_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_CCAF9CA7E8AF0FCFE82E5B4F0AC6DE4B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio</link:label>
    <link:label id="lab_us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_CCAF9CA7E8AF0FCFE82E5B4F0AC6DE4B_label_en-US" xlink:label="lab_us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_CCAF9CA7E8AF0FCFE82E5B4F0AC6DE4B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy to Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:label="loc_us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_CCAF9CA7E8AF0FCFE82E5B4F0AC6DE4B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_CCAF9CA7E8AF0FCFE82E5B4F0AC6DE4B" xlink:to="lab_us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets_CCAF9CA7E8AF0FCFE82E5B4F0AC6DE4B" xlink:type="arc" />
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_4AA5AFE4D896F005DE605B4F0AC6BAC0_terseLabel_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_4AA5AFE4D896F005DE605B4F0AC6BAC0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_4AA5AFE4D896F005DE605B4F0AC6BAC0_label_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_4AA5AFE4D896F005DE605B4F0AC6BAC0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_4AA5AFE4D896F005DE605B4F0AC6BAC0_documentation_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_4AA5AFE4D896F005DE605B4F0AC6BAC0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy plus capital conservation buffer phase-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein" xlink:label="loc_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_4AA5AFE4D896F005DE605B4F0AC6BAC0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_4AA5AFE4D896F005DE605B4F0AC6BAC0" xlink:to="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_4AA5AFE4D896F005DE605B4F0AC6BAC0" xlink:type="arc" />
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_74CA1919FE31CE9DFC9C5B4F0AC6ED86_terseLabel_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_74CA1919FE31CE9DFC9C5B4F0AC6ED86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_74CA1919FE31CE9DFC9C5B4F0AC6ED86_label_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_74CA1919FE31CE9DFC9C5B4F0AC6ED86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_74CA1919FE31CE9DFC9C5B4F0AC6ED86_documentation_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_74CA1919FE31CE9DFC9C5B4F0AC6ED86" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein" xlink:label="loc_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_74CA1919FE31CE9DFC9C5B4F0AC6ED86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_74CA1919FE31CE9DFC9C5B4F0AC6ED86" xlink:to="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_74CA1919FE31CE9DFC9C5B4F0AC6ED86" xlink:type="arc" />
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_ACC9FBE07DD7371990805B4F0AC69A46_terseLabel_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_ACC9FBE07DD7371990805B4F0AC69A46" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in</link:label>
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_ACC9FBE07DD7371990805B4F0AC69A46_label_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_ACC9FBE07DD7371990805B4F0AC69A46" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in</link:label>
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_ACC9FBE07DD7371990805B4F0AC69A46_documentation_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_ACC9FBE07DD7371990805B4F0AC69A46" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin" xlink:label="loc_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_ACC9FBE07DD7371990805B4F0AC69A46" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_ACC9FBE07DD7371990805B4F0AC69A46" xlink:to="lab_colb_CapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_ACC9FBE07DD7371990805B4F0AC69A46" xlink:type="arc" />
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_1CA7988EC1B7EA0D9C325B4F0AC6CC7C_terseLabel_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_1CA7988EC1B7EA0D9C325B4F0AC6CC7C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in</link:label>
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_1CA7988EC1B7EA0D9C325B4F0AC6CC7C_label_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_1CA7988EC1B7EA0D9C325B4F0AC6CC7C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in</link:label>
    <link:label id="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_1CA7988EC1B7EA0D9C325B4F0AC6CC7C_documentation_en-US" xlink:label="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_1CA7988EC1B7EA0D9C325B4F0AC6CC7C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin" xlink:label="loc_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_1CA7988EC1B7EA0D9C325B4F0AC6CC7C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_1CA7988EC1B7EA0D9C325B4F0AC6CC7C" xlink:to="lab_colb_CapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_1CA7988EC1B7EA0D9C325B4F0AC6CC7C" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalRequiredToBeWellCapitalized_E9D4CCA3C8009336AF5E5B4F0AC67B5B_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalRequiredToBeWellCapitalized_E9D4CCA3C8009336AF5E5B4F0AC67B5B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Capital To Be Well Capitalized Under Prompt Corrective Action Provision, Amount</link:label>
    <link:label id="lab_us-gaap_CapitalRequiredToBeWellCapitalized_E9D4CCA3C8009336AF5E5B4F0AC67B5B_label_en-US" xlink:label="lab_us-gaap_CapitalRequiredToBeWellCapitalized_E9D4CCA3C8009336AF5E5B4F0AC67B5B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Required to be Well Capitalized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalRequiredToBeWellCapitalized" xlink:label="loc_us-gaap_CapitalRequiredToBeWellCapitalized_E9D4CCA3C8009336AF5E5B4F0AC67B5B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalRequiredToBeWellCapitalized_E9D4CCA3C8009336AF5E5B4F0AC67B5B" xlink:to="lab_us-gaap_CapitalRequiredToBeWellCapitalized_E9D4CCA3C8009336AF5E5B4F0AC67B5B" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_5DF1EBBB54A9E3E941575B4F0AC6B386_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_5DF1EBBB54A9E3E941575B4F0AC6B386" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Capital (to risk-weighted assets) To Be Well Capitalized Under Prompt Corrective Action Provision</link:label>
    <link:label id="lab_us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_5DF1EBBB54A9E3E941575B4F0AC6B386_label_en-US" xlink:label="lab_us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_5DF1EBBB54A9E3E941575B4F0AC6B386" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Required to be Well Capitalized to Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:label="loc_us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_5DF1EBBB54A9E3E941575B4F0AC6B386" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_5DF1EBBB54A9E3E941575B4F0AC6B386" xlink:to="lab_us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_5DF1EBBB54A9E3E941575B4F0AC6B386" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneRiskBasedCapital_8EA15A1FBC2CB910E1C95B4F0AC64254_verboseLabel_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapital_8EA15A1FBC2CB910E1C95B4F0AC64254" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital, Actual Amount</link:label>
    <link:label id="lab_us-gaap_TierOneRiskBasedCapital_8EA15A1FBC2CB910E1C95B4F0AC64254_label_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapital_8EA15A1FBC2CB910E1C95B4F0AC64254" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneRiskBasedCapital" xlink:label="loc_us-gaap_TierOneRiskBasedCapital_8EA15A1FBC2CB910E1C95B4F0AC64254" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneRiskBasedCapital_8EA15A1FBC2CB910E1C95B4F0AC64254" xlink:to="lab_us-gaap_TierOneRiskBasedCapital_8EA15A1FBC2CB910E1C95B4F0AC64254" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_5BC6616D09894729443D5B4F0AC6540B_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_5BC6616D09894729443D5B4F0AC6540B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital (to risk-weighted assets), Ratio</link:label>
    <link:label id="lab_us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_5BC6616D09894729443D5B4F0AC6540B_label_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_5BC6616D09894729443D5B4F0AC6540B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital to Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets" xlink:label="loc_us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_5BC6616D09894729443D5B4F0AC6540B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_5BC6616D09894729443D5B4F0AC6540B" xlink:to="lab_us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets_5BC6616D09894729443D5B4F0AC6540B" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_86F12137F16EA9E0EE0B5B4F0AC64864_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_86F12137F16EA9E0EE0B5B4F0AC64864" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital For Capital Adequacy Purposes, Amount</link:label>
    <link:label id="lab_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_86F12137F16EA9E0EE0B5B4F0AC64864_label_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_86F12137F16EA9E0EE0B5B4F0AC64864" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital Required for Capital Adequacy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy" xlink:label="loc_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_86F12137F16EA9E0EE0B5B4F0AC64864" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_86F12137F16EA9E0EE0B5B4F0AC64864" xlink:to="lab_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy_86F12137F16EA9E0EE0B5B4F0AC64864" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_8488F492BC1A7FF58F365B4F0AC61846_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_8488F492BC1A7FF58F365B4F0AC61846" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital (to risk-weighted assets) For Capital Adequacy Purposes, Ratio</link:label>
    <link:label id="lab_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_8488F492BC1A7FF58F365B4F0AC61846_label_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_8488F492BC1A7FF58F365B4F0AC61846" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" xlink:label="loc_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_8488F492BC1A7FF58F365B4F0AC61846" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_8488F492BC1A7FF58F365B4F0AC61846" xlink:to="lab_us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets_8488F492BC1A7FF58F365B4F0AC61846" xlink:type="arc" />
    <link:label id="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_13AF42466280231890CB5B4F0AC67E97_terseLabel_en-US" xlink:label="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_13AF42466280231890CB5B4F0AC67E97" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital Required for Capital Adequacy plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_13AF42466280231890CB5B4F0AC67E97_label_en-US" xlink:label="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_13AF42466280231890CB5B4F0AC67E97" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital Required for Capital Adequacy plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_13AF42466280231890CB5B4F0AC67E97_documentation_en-US" xlink:label="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_13AF42466280231890CB5B4F0AC67E97" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital Required for Capital Adequacy plus capital conservation buffer phase-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein" xlink:label="loc_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_13AF42466280231890CB5B4F0AC67E97" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_13AF42466280231890CB5B4F0AC67E97" xlink:to="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferphasein_13AF42466280231890CB5B4F0AC67E97" xlink:type="arc" />
    <link:label id="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_49425642B0D368ABE9A35B4F0AC62530_terseLabel_en-US" xlink:label="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_49425642B0D368ABE9A35B4F0AC62530" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier One Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_49425642B0D368ABE9A35B4F0AC62530_label_en-US" xlink:label="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_49425642B0D368ABE9A35B4F0AC62530" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in</link:label>
    <link:label id="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_49425642B0D368ABE9A35B4F0AC62530_documentation_en-US" xlink:label="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_49425642B0D368ABE9A35B4F0AC62530" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tier One Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein" xlink:label="loc_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_49425642B0D368ABE9A35B4F0AC62530" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_49425642B0D368ABE9A35B4F0AC62530" xlink:to="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferphasein_49425642B0D368ABE9A35B4F0AC62530" xlink:type="arc" />
    <link:label id="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_8ABBA53B5DA60A6B69485B4F0AC600E6_terseLabel_en-US" xlink:label="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_8ABBA53B5DA60A6B69485B4F0AC600E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in</link:label>
    <link:label id="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_8ABBA53B5DA60A6B69485B4F0AC600E6_label_en-US" xlink:label="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_8ABBA53B5DA60A6B69485B4F0AC600E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in</link:label>
    <link:label id="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_8ABBA53B5DA60A6B69485B4F0AC600E6_documentation_en-US" xlink:label="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_8ABBA53B5DA60A6B69485B4F0AC600E6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin" xlink:label="loc_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_8ABBA53B5DA60A6B69485B4F0AC600E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_8ABBA53B5DA60A6B69485B4F0AC600E6" xlink:to="lab_colb_TierOneRiskBasedCapitalRequiredforCapitalAdequacypluscapitalconservationbufferfullyphasedin_8ABBA53B5DA60A6B69485B4F0AC600E6" xlink:type="arc" />
    <link:label id="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_BB817BC5C2BB4FC5B8A45B4F0AC6C519_terseLabel_en-US" xlink:label="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_BB817BC5C2BB4FC5B8A45B4F0AC6C519" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier One Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in</link:label>
    <link:label id="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_BB817BC5C2BB4FC5B8A45B4F0AC6C519_label_en-US" xlink:label="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_BB817BC5C2BB4FC5B8A45B4F0AC6C519" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in</link:label>
    <link:label id="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_BB817BC5C2BB4FC5B8A45B4F0AC6C519_documentation_en-US" xlink:label="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_BB817BC5C2BB4FC5B8A45B4F0AC6C519" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tier One Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin" xlink:label="loc_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_BB817BC5C2BB4FC5B8A45B4F0AC6C519" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_BB817BC5C2BB4FC5B8A45B4F0AC6C519" xlink:to="lab_colb_TierOneBasedCapitalRequiredforCapitalAdequacytoRiskWeightedAssetspluscapitalconservationbufferfullyphasedin_BB817BC5C2BB4FC5B8A45B4F0AC6C519" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_D028D0A699A6414809B15B4F0AC64E71_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_D028D0A699A6414809B15B4F0AC64E71" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital To Be Well Capitalized Under Prompt Corrective Action Provision, Amount</link:label>
    <link:label id="lab_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_D028D0A699A6414809B15B4F0AC64E71_label_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_D028D0A699A6414809B15B4F0AC64E71" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital Required to be Well Capitalized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized" xlink:label="loc_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_D028D0A699A6414809B15B4F0AC64E71" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_D028D0A699A6414809B15B4F0AC64E71" xlink:to="lab_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized_D028D0A699A6414809B15B4F0AC64E71" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_E835B9D57B0D10E679D15B4F0AC66904_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_E835B9D57B0D10E679D15B4F0AC66904" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital (to risk-weighted assets) To Be Well Capitalized Under Prompt Corrective Action Provision, Ratio</link:label>
    <link:label id="lab_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_E835B9D57B0D10E679D15B4F0AC66904_label_en-US" xlink:label="lab_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_E835B9D57B0D10E679D15B4F0AC66904" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" xlink:label="loc_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_E835B9D57B0D10E679D15B4F0AC66904" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_E835B9D57B0D10E679D15B4F0AC66904" xlink:to="lab_us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets_E835B9D57B0D10E679D15B4F0AC66904" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneLeverageCapital_054FDF9B4CA63AA55F125B4F0AC67150_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapital_054FDF9B4CA63AA55F125B4F0AC67150" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital, Actual Amount</link:label>
    <link:label id="lab_us-gaap_TierOneLeverageCapital_054FDF9B4CA63AA55F125B4F0AC67150_label_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapital_054FDF9B4CA63AA55F125B4F0AC67150" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Leverage Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapital" xlink:label="loc_us-gaap_TierOneLeverageCapital_054FDF9B4CA63AA55F125B4F0AC67150" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneLeverageCapital_054FDF9B4CA63AA55F125B4F0AC67150" xlink:to="lab_us-gaap_TierOneLeverageCapital_054FDF9B4CA63AA55F125B4F0AC67150" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneLeverageCapitalToAverageAssets_D8D1B7C2C0F4B588E1F35B4F0AC6D381_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapitalToAverageAssets_D8D1B7C2C0F4B588E1F35B4F0AC6D381" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital (to average assets), Ratio</link:label>
    <link:label id="lab_us-gaap_TierOneLeverageCapitalToAverageAssets_D8D1B7C2C0F4B588E1F35B4F0AC6D381_label_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapitalToAverageAssets_D8D1B7C2C0F4B588E1F35B4F0AC6D381" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Leverage Capital to Average Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapitalToAverageAssets" xlink:label="loc_us-gaap_TierOneLeverageCapitalToAverageAssets_D8D1B7C2C0F4B588E1F35B4F0AC6D381" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneLeverageCapitalToAverageAssets_D8D1B7C2C0F4B588E1F35B4F0AC6D381" xlink:to="lab_us-gaap_TierOneLeverageCapitalToAverageAssets_D8D1B7C2C0F4B588E1F35B4F0AC6D381" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_4849EB3B02CFF882CA6B5B4F0AC6E46D_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_4849EB3B02CFF882CA6B5B4F0AC6E46D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital For Capital Adequacy Purposes, Amount</link:label>
    <link:label id="lab_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_4849EB3B02CFF882CA6B5B4F0AC6E46D_label_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_4849EB3B02CFF882CA6B5B4F0AC6E46D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Leverage Capital Required for Capital Adequacy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy" xlink:label="loc_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_4849EB3B02CFF882CA6B5B4F0AC6E46D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_4849EB3B02CFF882CA6B5B4F0AC6E46D" xlink:to="lab_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy_4849EB3B02CFF882CA6B5B4F0AC6E46D" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_7730440095C4F9BA5AE55B4F0AC6D991_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_7730440095C4F9BA5AE55B4F0AC6D991" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital (to average assets) For Capital Adequacy Purposes, Ratio</link:label>
    <link:label id="lab_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_7730440095C4F9BA5AE55B4F0AC6D991_label_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_7730440095C4F9BA5AE55B4F0AC6D991" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Leverage Capital Required for Capital Adequacy to Average Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets" xlink:label="loc_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_7730440095C4F9BA5AE55B4F0AC6D991" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_7730440095C4F9BA5AE55B4F0AC6D991" xlink:to="lab_us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets_7730440095C4F9BA5AE55B4F0AC6D991" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_6B51EF84AD7B4A6EA26F5B4F0AC6C533_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_6B51EF84AD7B4A6EA26F5B4F0AC6C533" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital To Be Well Capitalized Under Prompt Corrective Provision, Amount</link:label>
    <link:label id="lab_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_6B51EF84AD7B4A6EA26F5B4F0AC6C533_label_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_6B51EF84AD7B4A6EA26F5B4F0AC6C533" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Leverage Capital Required to be Well Capitalized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized" xlink:label="loc_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_6B51EF84AD7B4A6EA26F5B4F0AC6C533" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_6B51EF84AD7B4A6EA26F5B4F0AC6C533" xlink:to="lab_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized_6B51EF84AD7B4A6EA26F5B4F0AC6C533" xlink:type="arc" />
    <link:label id="lab_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_3ABBE8ABD94BCCDE1CC75B4F0AC61168_terseLabel_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_3ABBE8ABD94BCCDE1CC75B4F0AC61168" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tier 1 Capital (to average assets) To Be Well Capitalized Under Prompt Corrective Provision, Ratio</link:label>
    <link:label id="lab_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_3ABBE8ABD94BCCDE1CC75B4F0AC61168_label_en-US" xlink:label="lab_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_3ABBE8ABD94BCCDE1CC75B4F0AC61168" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tier One Leverage Capital Required to be Well Capitalized to Average Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets" xlink:label="loc_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_3ABBE8ABD94BCCDE1CC75B4F0AC61168" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_3ABBE8ABD94BCCDE1CC75B4F0AC61168" xlink:to="lab_us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets_3ABBE8ABD94BCCDE1CC75B4F0AC61168" xlink:type="arc" />
    <link:label id="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCredit_887D082F6EA6485EE0115B4F085628B1_label_en-US" xlink:label="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCredit_887D082F6EA6485EE0115B4F085628B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit</link:label>
    <link:label id="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCredit_887D082F6EA6485EE0115B4F085628B1_documentation_en-US" xlink:label="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCredit_887D082F6EA6485EE0115B4F085628B1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCredit" xlink:label="loc_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCredit_887D082F6EA6485EE0115B4F085628B1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCredit_887D082F6EA6485EE0115B4F085628B1" xlink:to="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCredit_887D082F6EA6485EE0115B4F085628B1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_FB6FBF385E95F54337C45B4F0856879E_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_FB6FBF385E95F54337C45B4F0856879E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Accounts, Notes, Loans and Financing Receivable [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_FB6FBF385E95F54337C45B4F0856879E_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_FB6FBF385E95F54337C45B4F0856879E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Accounts, Notes, Loans and Financing Receivable [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_FB6FBF385E95F54337C45B4F0856879E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_FB6FBF385E95F54337C45B4F0856879E" xlink:to="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_FB6FBF385E95F54337C45B4F0856879E" xlink:type="arc" />
    <link:label id="lab_srt_MaximumMember_BCC5A3BF3B4E535564195B4F08665EF2_terseLabel_en-US" xlink:label="lab_srt_MaximumMember_BCC5A3BF3B4E535564195B4F08665EF2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum [Member]</link:label>
    <link:label id="lab_srt_MaximumMember_BCC5A3BF3B4E535564195B4F08665EF2_label_en-US" xlink:label="lab_srt_MaximumMember_BCC5A3BF3B4E535564195B4F08665EF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MaximumMember" xlink:label="loc_srt_MaximumMember_BCC5A3BF3B4E535564195B4F08665EF2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MaximumMember_BCC5A3BF3B4E535564195B4F08665EF2" xlink:to="lab_srt_MaximumMember_BCC5A3BF3B4E535564195B4F08665EF2" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_7C60B306C6DF84FD32BD5B4F08667074_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_7C60B306C6DF84FD32BD5B4F08667074" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts, Notes, Loans and Financing Receivable [Line Items]</link:label>
    <link:label id="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_7C60B306C6DF84FD32BD5B4F08667074_label_en-US" xlink:label="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_7C60B306C6DF84FD32BD5B4F08667074" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts, Notes, Loans and Financing Receivable [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7C60B306C6DF84FD32BD5B4F08667074" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_7C60B306C6DF84FD32BD5B4F08667074" xlink:to="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_7C60B306C6DF84FD32BD5B4F08667074" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_BD69A7F0053C08D97A525B4F08C44F89_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_BD69A7F0053C08D97A525B4F08C44F89" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Basic and Diluted Earnings Per Share</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_BD69A7F0053C08D97A525B4F08C44F89_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_BD69A7F0053C08D97A525B4F08C44F89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_BD69A7F0053C08D97A525B4F08C44F89" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_BD69A7F0053C08D97A525B4F08C44F89" xlink:to="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_BD69A7F0053C08D97A525B4F08C44F89" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_5AB54BE1DF246A74054E3E636BC00729_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_5AB54BE1DF246A74054E3E636BC00729" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Table]</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_5AB54BE1DF246A74054E3E636BC00729_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_5AB54BE1DF246A74054E3E636BC00729" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_5AB54BE1DF246A74054E3E636BC00729" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_5AB54BE1DF246A74054E3E636BC00729" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_5AB54BE1DF246A74054E3E636BC00729" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EEE5D822D8F298A2C7643E636BC06D0F_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EEE5D822D8F298A2C7643E636BC06D0F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustments for New Accounting Pronouncements [Axis]</link:label>
    <link:label id="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EEE5D822D8F298A2C7643E636BC06D0F_label_en-US" xlink:label="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EEE5D822D8F298A2C7643E636BC06D0F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments for New Accounting Pronouncements [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EEE5D822D8F298A2C7643E636BC06D0F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EEE5D822D8F298A2C7643E636BC06D0F" xlink:to="lab_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_EEE5D822D8F298A2C7643E636BC06D0F" xlink:type="arc" />
    <link:label id="lab_us-gaap_TypeOfAdoptionMember_6CC8C6B7B3D9F3AA104B3E636BC02EDF_terseLabel_en-US" xlink:label="lab_us-gaap_TypeOfAdoptionMember_6CC8C6B7B3D9F3AA104B3E636BC02EDF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Type of Adoption [Domain]</link:label>
    <link:label id="lab_us-gaap_TypeOfAdoptionMember_6CC8C6B7B3D9F3AA104B3E636BC02EDF_label_en-US" xlink:label="lab_us-gaap_TypeOfAdoptionMember_6CC8C6B7B3D9F3AA104B3E636BC02EDF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Type of Adoption [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_6CC8C6B7B3D9F3AA104B3E636BC02EDF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TypeOfAdoptionMember_6CC8C6B7B3D9F3AA104B3E636BC02EDF" xlink:to="lab_us-gaap_TypeOfAdoptionMember_6CC8C6B7B3D9F3AA104B3E636BC02EDF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountingStandardsUpdate201601Member_54CEB6EDA812858799013E636BC049E8_terseLabel_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201601Member_54CEB6EDA812858799013E636BC049E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounting Standards Update 2016-01 [Member]</link:label>
    <link:label id="lab_us-gaap_AccountingStandardsUpdate201601Member_54CEB6EDA812858799013E636BC049E8_label_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201601Member_54CEB6EDA812858799013E636BC049E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Standards Update 2016-01 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201601Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201601Member_54CEB6EDA812858799013E636BC049E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountingStandardsUpdate201601Member_54CEB6EDA812858799013E636BC049E8" xlink:to="lab_us-gaap_AccountingStandardsUpdate201601Member_54CEB6EDA812858799013E636BC049E8" xlink:type="arc" />
    <link:label id="lab_colb_AccountingStandardsUpdate201802Member_5149746F34D2D22F64053E636BC026F4_terseLabel_en-US" xlink:label="lab_colb_AccountingStandardsUpdate201802Member_5149746F34D2D22F64053E636BC026F4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounting Standards Update 2018-02 [Member]</link:label>
    <link:label id="lab_colb_AccountingStandardsUpdate201802Member_5149746F34D2D22F64053E636BC026F4_label_en-US" xlink:label="lab_colb_AccountingStandardsUpdate201802Member_5149746F34D2D22F64053E636BC026F4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Standards Update 2018-02 [Member]</link:label>
    <link:label id="lab_colb_AccountingStandardsUpdate201802Member_5149746F34D2D22F64053E636BC026F4_documentation_en-US" xlink:label="lab_colb_AccountingStandardsUpdate201802Member_5149746F34D2D22F64053E636BC026F4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accounting Standards Update 2018-02 [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AccountingStandardsUpdate201802Member" xlink:label="loc_colb_AccountingStandardsUpdate201802Member_5149746F34D2D22F64053E636BC026F4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AccountingStandardsUpdate201802Member_5149746F34D2D22F64053E636BC026F4" xlink:to="lab_colb_AccountingStandardsUpdate201802Member_5149746F34D2D22F64053E636BC026F4" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_4F3423FEDC0BCD9E256C3E636BC0DC88_terseLabel_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis_4F3423FEDC0BCD9E256C3E636BC0DC88" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_4F3423FEDC0BCD9E256C3E636BC0DC88_label_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis_4F3423FEDC0BCD9E256C3E636BC0DC88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Components [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_4F3423FEDC0BCD9E256C3E636BC0DC88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_4F3423FEDC0BCD9E256C3E636BC0DC88" xlink:to="lab_us-gaap_StatementEquityComponentsAxis_4F3423FEDC0BCD9E256C3E636BC0DC88" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityComponentDomain_F996A9C5544EE45265AE3E636BC06C2D_terseLabel_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_F996A9C5544EE45265AE3E636BC06C2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
    <link:label id="lab_us-gaap_EquityComponentDomain_F996A9C5544EE45265AE3E636BC06C2D_label_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_F996A9C5544EE45265AE3E636BC06C2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Component [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_F996A9C5544EE45265AE3E636BC06C2D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityComponentDomain_F996A9C5544EE45265AE3E636BC06C2D" xlink:to="lab_us-gaap_EquityComponentDomain_F996A9C5544EE45265AE3E636BC06C2D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_BD8F67EDE1AED8A178723E636BC071DE_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_BD8F67EDE1AED8A178723E636BC071DE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Net Unrealized Investment Gain (Loss) [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_BD8F67EDE1AED8A178723E636BC071DE_label_en-US" xlink:label="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_BD8F67EDE1AED8A178723E636BC071DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_BD8F67EDE1AED8A178723E636BC071DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_BD8F67EDE1AED8A178723E636BC071DE" xlink:to="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_BD8F67EDE1AED8A178723E636BC071DE" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_9C77015608AF4CE40B273E636BC02ECF_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_9C77015608AF4CE40B273E636BC02ECF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Defined Benefit Plans Adjustment [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_9C77015608AF4CE40B273E636BC02ECF_label_en-US" xlink:label="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_9C77015608AF4CE40B273E636BC02ECF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_9C77015608AF4CE40B273E636BC02ECF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_9C77015608AF4CE40B273E636BC02ECF" xlink:to="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_9C77015608AF4CE40B273E636BC02ECF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4C4930BFF249786BC0943E636BC0FAA4_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4C4930BFF249786BC0943E636BC0FAA4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4C4930BFF249786BC0943E636BC0FAA4_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4C4930BFF249786BC0943E636BC0FAA4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">AOCI Attributable to Parent [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4C4930BFF249786BC0943E636BC0FAA4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4C4930BFF249786BC0943E636BC0FAA4" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4C4930BFF249786BC0943E636BC0FAA4" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_784457CECED9B7F41EEA3E636BC08CFB_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_784457CECED9B7F41EEA3E636BC08CFB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Line Items]</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_784457CECED9B7F41EEA3E636BC08CFB_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_784457CECED9B7F41EEA3E636BC08CFB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_784457CECED9B7F41EEA3E636BC08CFB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_784457CECED9B7F41EEA3E636BC08CFB" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_784457CECED9B7F41EEA3E636BC08CFB" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3FB47DD5B8B5DF20E8533E636BC0D66A_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3FB47DD5B8B5DF20E8533E636BC0D66A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3FB47DD5B8B5DF20E8533E636BC0D66A_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3FB47DD5B8B5DF20E8533E636BC0D66A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3FB47DD5B8B5DF20E8533E636BC0D66A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3FB47DD5B8B5DF20E8533E636BC0D66A" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3FB47DD5B8B5DF20E8533E636BC0D66A" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_E6301686EEF3A0700F573E636BC013C4_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_E6301686EEF3A0700F573E636BC013C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), before Reclassifications, Net of Tax</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_E6301686EEF3A0700F573E636BC013C4_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_E6301686EEF3A0700F573E636BC013C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), before Reclassifications, Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_E6301686EEF3A0700F573E636BC013C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_E6301686EEF3A0700F573E636BC013C4" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_E6301686EEF3A0700F573E636BC013C4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_B5D2777414E4B60CAD823E636BC056AC_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_B5D2777414E4B60CAD823E636BC056AC" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax</link:label>
    <link:label id="lab_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_B5D2777414E4B60CAD823E636BC056AC_label_en-US" xlink:label="lab_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_B5D2777414E4B60CAD823E636BC056AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_B5D2777414E4B60CAD823E636BC056AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_B5D2777414E4B60CAD823E636BC056AC" xlink:to="lab_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_B5D2777414E4B60CAD823E636BC056AC" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9BFE9D5BE7E4BB3A80AC3E636BC012C6_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9BFE9D5BE7E4BB3A80AC3E636BC012C6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9BFE9D5BE7E4BB3A80AC3E636BC012C6_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9BFE9D5BE7E4BB3A80AC3E636BC012C6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9BFE9D5BE7E4BB3A80AC3E636BC012C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9BFE9D5BE7E4BB3A80AC3E636BC012C6" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9BFE9D5BE7E4BB3A80AC3E636BC012C6" xlink:type="arc" />
    <link:label id="lab_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_26F09E5DE9C09508D7813E636BC0A2E5_terseLabel_en-US" xlink:label="lab_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_26F09E5DE9C09508D7813E636BC0A2E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cumulative Effect of New Accounting Principle in Period of Adoption</link:label>
    <link:label id="lab_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_26F09E5DE9C09508D7813E636BC0A2E5_label_en-US" xlink:label="lab_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_26F09E5DE9C09508D7813E636BC0A2E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cumulative Effect of New Accounting Principle in Period of Adoption</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_26F09E5DE9C09508D7813E636BC0A2E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_26F09E5DE9C09508D7813E636BC0A2E5" xlink:to="lab_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_26F09E5DE9C09508D7813E636BC0A2E5" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableMember_9EFBD841531F436FCE235CE390D2D56D_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableMember_9EFBD841531F436FCE235CE390D2D56D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Receivable [Member]</link:label>
    <link:label id="lab_us-gaap_LoansReceivableMember_9EFBD841531F436FCE235CE390D2D56D_label_en-US" xlink:label="lab_us-gaap_LoansReceivableMember_9EFBD841531F436FCE235CE390D2D56D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableMember" xlink:label="loc_us-gaap_LoansReceivableMember_9EFBD841531F436FCE235CE390D2D56D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableMember_9EFBD841531F436FCE235CE390D2D56D" xlink:to="lab_us-gaap_LoansReceivableMember_9EFBD841531F436FCE235CE390D2D56D" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommercialLoanMember_BC476976186549C1AAAB5CE390D2F7FE_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialLoanMember_BC476976186549C1AAAB5CE390D2F7FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial Loan [Member]</link:label>
    <link:label id="lab_us-gaap_CommercialLoanMember_BC476976186549C1AAAB5CE390D2F7FE_label_en-US" xlink:label="lab_us-gaap_CommercialLoanMember_BC476976186549C1AAAB5CE390D2F7FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial Loan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommercialLoanMember" xlink:label="loc_us-gaap_CommercialLoanMember_BC476976186549C1AAAB5CE390D2F7FE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommercialLoanMember_BC476976186549C1AAAB5CE390D2F7FE" xlink:to="lab_us-gaap_CommercialLoanMember_BC476976186549C1AAAB5CE390D2F7FE" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableRelatedParties_40D648585F8EA50DC8735CE390D28AD9_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableRelatedParties_40D648585F8EA50DC8735CE390D28AD9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans to related parties</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableRelatedParties_40D648585F8EA50DC8735CE390D28AD9_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableRelatedParties_40D648585F8EA50DC8735CE390D28AD9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Related Parties</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableRelatedParties" xlink:label="loc_us-gaap_LoansAndLeasesReceivableRelatedParties_40D648585F8EA50DC8735CE390D28AD9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableRelatedParties_40D648585F8EA50DC8735CE390D28AD9" xlink:to="lab_us-gaap_LoansAndLeasesReceivableRelatedParties_40D648585F8EA50DC8735CE390D28AD9" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions_74D460F0543EA183073A5CE390D24579_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions_74D460F0543EA183073A5CE390D24579" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Related Parties, Additions</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions_74D460F0543EA183073A5CE390D24579_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions_74D460F0543EA183073A5CE390D24579" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Related Parties, Additions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions" xlink:label="loc_us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions_74D460F0543EA183073A5CE390D24579" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions_74D460F0543EA183073A5CE390D24579" xlink:to="lab_us-gaap_LoansAndLeasesReceivableRelatedPartiesAdditions_74D460F0543EA183073A5CE390D24579" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds_688118611E8691DAD51A5CE390D2E65C_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds_688118611E8691DAD51A5CE390D2E65C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repayments on related party loans</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds_688118611E8691DAD51A5CE390D2E65C_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds_688118611E8691DAD51A5CE390D2E65C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Related Parties, Proceeds</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds" xlink:label="loc_us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds_688118611E8691DAD51A5CE390D2E65C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds_688118611E8691DAD51A5CE390D2E65C" xlink:to="lab_us-gaap_LoansAndLeasesReceivableRelatedPartiesProceeds_688118611E8691DAD51A5CE390D2E65C" xlink:type="arc" />
    <link:label id="lab_colb_LoanspledgedtocollateralizeFederalHomeLoanBankAdvances_1C15F2E70FF99BD80C4A5CE390D2717D_terseLabel_en-US" xlink:label="lab_colb_LoanspledgedtocollateralizeFederalHomeLoanBankAdvances_1C15F2E70FF99BD80C4A5CE390D2717D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans pledged to collateralize Federal Home Loan Bank Advances</link:label>
    <link:label id="lab_colb_LoanspledgedtocollateralizeFederalHomeLoanBankAdvances_1C15F2E70FF99BD80C4A5CE390D2717D_label_en-US" xlink:label="lab_colb_LoanspledgedtocollateralizeFederalHomeLoanBankAdvances_1C15F2E70FF99BD80C4A5CE390D2717D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans pledged to collateralize Federal Home Loan Bank Advances</link:label>
    <link:label id="lab_colb_LoanspledgedtocollateralizeFederalHomeLoanBankAdvances_1C15F2E70FF99BD80C4A5CE390D2717D_documentation_en-US" xlink:label="lab_colb_LoanspledgedtocollateralizeFederalHomeLoanBankAdvances_1C15F2E70FF99BD80C4A5CE390D2717D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans pledged to collateralize Federal Home Loan Bank Advances</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoanspledgedtocollateralizeFederalHomeLoanBankAdvances" xlink:label="loc_colb_LoanspledgedtocollateralizeFederalHomeLoanBankAdvances_1C15F2E70FF99BD80C4A5CE390D2717D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoanspledgedtocollateralizeFederalHomeLoanBankAdvances_1C15F2E70FF99BD80C4A5CE390D2717D" xlink:to="lab_colb_LoanspledgedtocollateralizeFederalHomeLoanBankAdvances_1C15F2E70FF99BD80C4A5CE390D2717D" xlink:type="arc" />
    <link:label id="lab_colb_LoanspledgedtocollateralizeFederalReserveBankBorrowings_F10D672FBE2C291542885CE390D29F44_terseLabel_en-US" xlink:label="lab_colb_LoanspledgedtocollateralizeFederalReserveBankBorrowings_F10D672FBE2C291542885CE390D29F44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans pledged to collateralize Federal Reserve Bank Borrowings</link:label>
    <link:label id="lab_colb_LoanspledgedtocollateralizeFederalReserveBankBorrowings_F10D672FBE2C291542885CE390D29F44_label_en-US" xlink:label="lab_colb_LoanspledgedtocollateralizeFederalReserveBankBorrowings_F10D672FBE2C291542885CE390D29F44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans pledged to collateralize Federal Reserve Bank Borrowings</link:label>
    <link:label id="lab_colb_LoanspledgedtocollateralizeFederalReserveBankBorrowings_F10D672FBE2C291542885CE390D29F44_documentation_en-US" xlink:label="lab_colb_LoanspledgedtocollateralizeFederalReserveBankBorrowings_F10D672FBE2C291542885CE390D29F44" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans pledged to collateralize Federal Reserve Bank Borrowings</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoanspledgedtocollateralizeFederalReserveBankBorrowings" xlink:label="loc_colb_LoanspledgedtocollateralizeFederalReserveBankBorrowings_F10D672FBE2C291542885CE390D29F44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoanspledgedtocollateralizeFederalReserveBankBorrowings_F10D672FBE2C291542885CE390D29F44" xlink:to="lab_colb_LoanspledgedtocollateralizeFederalReserveBankBorrowings_F10D672FBE2C291542885CE390D29F44" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_8B340965537E7C7B324F5CE390D2F354_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_8B340965537E7C7B324F5CE390D2F354" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, Nonaccrual Status</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_8B340965537E7C7B324F5CE390D2F354" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_8B340965537E7C7B324F5CE390D2F354" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_8B340965537E7C7B324F5CE390D2F354" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans_73FA56A4E8A01F8759155CE390D23CB0_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans_73FA56A4E8A01F8759155CE390D23CB0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans_73FA56A4E8A01F8759155CE390D23CB0_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans_73FA56A4E8A01F8759155CE390D23CB0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans" xlink:label="loc_us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans_73FA56A4E8A01F8759155CE390D23CB0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans_73FA56A4E8A01F8759155CE390D23CB0" xlink:to="lab_us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans_73FA56A4E8A01F8759155CE390D23CB0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_B9FCF01CB3AD7BCFEF365CE390D2B0D4_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_B9FCF01CB3AD7BCFEF365CE390D2B0D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing, Number of Loans</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_B9FCF01CB3AD7BCFEF365CE390D2B0D4_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_B9FCF01CB3AD7BCFEF365CE390D2B0D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_B9FCF01CB3AD7BCFEF365CE390D2B0D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_B9FCF01CB3AD7BCFEF365CE390D2B0D4" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_B9FCF01CB3AD7BCFEF365CE390D2B0D4" xlink:type="arc" />
    <link:label id="lab_colb_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_57C40FE2EB31D2FA533F5CE390D2C17B_terseLabel_en-US" xlink:label="lab_colb_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_57C40FE2EB31D2FA533F5CE390D2C17B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing, Number of Loans</link:label>
    <link:label id="lab_colb_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_57C40FE2EB31D2FA533F5CE390D2C17B_label_en-US" xlink:label="lab_colb_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_57C40FE2EB31D2FA533F5CE390D2C17B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing, Number of Loans</link:label>
    <link:label id="lab_colb_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_57C40FE2EB31D2FA533F5CE390D2C17B_documentation_en-US" xlink:label="lab_colb_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_57C40FE2EB31D2FA533F5CE390D2C17B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing, Number of Loans</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans" xlink:label="loc_colb_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_57C40FE2EB31D2FA533F5CE390D2C17B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_57C40FE2EB31D2FA533F5CE390D2C17B" xlink:to="lab_colb_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruingNumberOfLoans_57C40FE2EB31D2FA533F5CE390D2C17B" xlink:type="arc" />
    <link:label id="lab_colb_LoansAndLeasesReceivableNonaccrualOfInterestCommitmentsOfAdditionalFunds_C4CC507215371EBBAFAB5CE390D22320_terseLabel_en-US" xlink:label="lab_colb_LoansAndLeasesReceivableNonaccrualOfInterestCommitmentsOfAdditionalFunds_C4CC507215371EBBAFAB5CE390D22320" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Nonaccrual of Interest, Commitments of Additional Funds</link:label>
    <link:label id="lab_colb_LoansAndLeasesReceivableNonaccrualOfInterestCommitmentsOfAdditionalFunds_C4CC507215371EBBAFAB5CE390D22320_label_en-US" xlink:label="lab_colb_LoansAndLeasesReceivableNonaccrualOfInterestCommitmentsOfAdditionalFunds_C4CC507215371EBBAFAB5CE390D22320" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Nonaccrual of Interest, Commitments of Additional Funds</link:label>
    <link:label id="lab_colb_LoansAndLeasesReceivableNonaccrualOfInterestCommitmentsOfAdditionalFunds_C4CC507215371EBBAFAB5CE390D22320_documentation_en-US" xlink:label="lab_colb_LoansAndLeasesReceivableNonaccrualOfInterestCommitmentsOfAdditionalFunds_C4CC507215371EBBAFAB5CE390D22320" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Nonaccrual of Interest, Commitments of Additional Funds</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoansAndLeasesReceivableNonaccrualOfInterestCommitmentsOfAdditionalFunds" xlink:label="loc_colb_LoansAndLeasesReceivableNonaccrualOfInterestCommitmentsOfAdditionalFunds_C4CC507215371EBBAFAB5CE390D22320" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoansAndLeasesReceivableNonaccrualOfInterestCommitmentsOfAdditionalFunds_C4CC507215371EBBAFAB5CE390D22320" xlink:to="lab_colb_LoansAndLeasesReceivableNonaccrualOfInterestCommitmentsOfAdditionalFunds_C4CC507215371EBBAFAB5CE390D22320" xlink:type="arc" />
    <link:label id="lab_colb_FinancingReceivableModificationsAdditionalCommitmentToLend_D9B9E700C5CCDE8F0DFB5CE390D2507C_terseLabel_en-US" xlink:label="lab_colb_FinancingReceivableModificationsAdditionalCommitmentToLend_D9B9E700C5CCDE8F0DFB5CE390D2507C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable Modifications Additional Commitment To Lend</link:label>
    <link:label id="lab_colb_FinancingReceivableModificationsAdditionalCommitmentToLend_D9B9E700C5CCDE8F0DFB5CE390D2507C_label_en-US" xlink:label="lab_colb_FinancingReceivableModificationsAdditionalCommitmentToLend_D9B9E700C5CCDE8F0DFB5CE390D2507C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable Modifications Additional Commitment To Lend</link:label>
    <link:label id="lab_colb_FinancingReceivableModificationsAdditionalCommitmentToLend_D9B9E700C5CCDE8F0DFB5CE390D2507C_documentation_en-US" xlink:label="lab_colb_FinancingReceivableModificationsAdditionalCommitmentToLend_D9B9E700C5CCDE8F0DFB5CE390D2507C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financing Receivable Modifications Additional Commitment To Lend</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FinancingReceivableModificationsAdditionalCommitmentToLend" xlink:label="loc_colb_FinancingReceivableModificationsAdditionalCommitmentToLend_D9B9E700C5CCDE8F0DFB5CE390D2507C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FinancingReceivableModificationsAdditionalCommitmentToLend_D9B9E700C5CCDE8F0DFB5CE390D2507C" xlink:to="lab_colb_FinancingReceivableModificationsAdditionalCommitmentToLend_D9B9E700C5CCDE8F0DFB5CE390D2507C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_B6ACE9DF33B1AC23A3975CE390D24378_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_B6ACE9DF33B1AC23A3975CE390D24378" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications, Subsequent Default, Number of Contracts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1" xlink:label="loc_us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_B6ACE9DF33B1AC23A3975CE390D24378" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_B6ACE9DF33B1AC23A3975CE390D24378" xlink:to="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_B6ACE9DF33B1AC23A3975CE390D24378" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_C8156F78BC946E8BCCB05B4F07CA9BF5_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_C8156F78BC946E8BCCB05B4F07CA9BF5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivatives and Balance Sheet Offsetting</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_C8156F78BC946E8BCCB05B4F07CA9BF5_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_C8156F78BC946E8BCCB05B4F07CA9BF5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments and Hedging Activities Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_C8156F78BC946E8BCCB05B4F07CA9BF5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_C8156F78BC946E8BCCB05B4F07CA9BF5" xlink:to="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_C8156F78BC946E8BCCB05B4F07CA9BF5" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubordinatedBorrowingsDisclosureTextBlock_431D64AF91A63D57683B5B4F08851B5A_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingsDisclosureTextBlock_431D64AF91A63D57683B5B4F08851B5A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated Borrowings Disclosure [Text Block]</link:label>
    <link:label id="lab_us-gaap_SubordinatedBorrowingsDisclosureTextBlock_431D64AF91A63D57683B5B4F08851B5A_label_en-US" xlink:label="lab_us-gaap_SubordinatedBorrowingsDisclosureTextBlock_431D64AF91A63D57683B5B4F08851B5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Borrowings Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubordinatedBorrowingsDisclosureTextBlock" xlink:label="loc_us-gaap_SubordinatedBorrowingsDisclosureTextBlock_431D64AF91A63D57683B5B4F08851B5A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedBorrowingsDisclosureTextBlock_431D64AF91A63D57683B5B4F08851B5A" xlink:to="lab_us-gaap_SubordinatedBorrowingsDisclosureTextBlock_431D64AF91A63D57683B5B4F08851B5A" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherRealEstateAndForeclosedAssetsAbstract_D0B49B2DDEE7249ECFE507590B163321_label_en-US" xlink:label="lab_us-gaap_OtherRealEstateAndForeclosedAssetsAbstract_D0B49B2DDEE7249ECFE507590B163321" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherRealEstateAndForeclosedAssetsAbstract" xlink:label="loc_us-gaap_OtherRealEstateAndForeclosedAssetsAbstract_D0B49B2DDEE7249ECFE507590B163321" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherRealEstateAndForeclosedAssetsAbstract_D0B49B2DDEE7249ECFE507590B163321" xlink:to="lab_us-gaap_OtherRealEstateAndForeclosedAssetsAbstract_D0B49B2DDEE7249ECFE507590B163321" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealEstateOwnedTextBlock_2CB5DB70EE32ADBA723707590B16AEA8_verboseLabel_en-US" xlink:label="lab_us-gaap_RealEstateOwnedTextBlock_2CB5DB70EE32ADBA723707590B16AEA8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned</link:label>
    <link:label id="lab_us-gaap_RealEstateOwnedTextBlock_2CB5DB70EE32ADBA723707590B16AEA8_label_en-US" xlink:label="lab_us-gaap_RealEstateOwnedTextBlock_2CB5DB70EE32ADBA723707590B16AEA8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Owned [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RealEstateOwnedTextBlock" xlink:label="loc_us-gaap_RealEstateOwnedTextBlock_2CB5DB70EE32ADBA723707590B16AEA8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateOwnedTextBlock_2CB5DB70EE32ADBA723707590B16AEA8" xlink:to="lab_us-gaap_RealEstateOwnedTextBlock_2CB5DB70EE32ADBA723707590B16AEA8" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_3FA273BB6C5B25ABBC74A54E6E9E7AA7_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_3FA273BB6C5B25ABBC74A54E6E9E7AA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income, net of tax:</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_3FA273BB6C5B25ABBC74A54E6E9E7AA7_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_3FA273BB6C5B25ABBC74A54E6E9E7AA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_3FA273BB6C5B25ABBC74A54E6E9E7AA7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_3FA273BB6C5B25ABBC74A54E6E9E7AA7" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_3FA273BB6C5B25ABBC74A54E6E9E7AA7" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesUnrealizedGainLossAbstract_684B4CED621BE5B1E6DDA54E6E9E9607_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesUnrealizedGainLossAbstract_684B4CED621BE5B1E6DDA54E6E9E9607" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrealized loss from securities:</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesUnrealizedGainLossAbstract_684B4CED621BE5B1E6DDA54E6E9E9607_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesUnrealizedGainLossAbstract_684B4CED621BE5B1E6DDA54E6E9E9607" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Unrealized Gain (Loss) [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesUnrealizedGainLossAbstract" xlink:label="loc_us-gaap_DebtSecuritiesUnrealizedGainLossAbstract_684B4CED621BE5B1E6DDA54E6E9E9607" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesUnrealizedGainLossAbstract_684B4CED621BE5B1E6DDA54E6E9E9607" xlink:to="lab_us-gaap_DebtSecuritiesUnrealizedGainLossAbstract_684B4CED621BE5B1E6DDA54E6E9E9607" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_BF59C85C6665F2B5320FA54E6E9E59CD_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_BF59C85C6665F2B5320FA54E6E9E59CD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net unrealized holding loss from available for sale securities arising during the period, net of tax of $4,067, $1,932 and $7,025</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_BF59C85C6665F2B5320FA54E6E9E59CD_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_BF59C85C6665F2B5320FA54E6E9E59CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_BF59C85C6665F2B5320FA54E6E9E59CD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_BF59C85C6665F2B5320FA54E6E9E59CD" xlink:to="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_BF59C85C6665F2B5320FA54E6E9E59CD" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_B6AD4779E3CB792FF3A3A54E6E9ECF7E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_B6AD4779E3CB792FF3A3A54E6E9ECF7E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Reclassification adjustment of net gain (loss) from sale of available for sale securities included in income, net of tax of $25, ($4) and $429</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_B6AD4779E3CB792FF3A3A54E6E9ECF7E_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_B6AD4779E3CB792FF3A3A54E6E9ECF7E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_B6AD4779E3CB792FF3A3A54E6E9ECF7E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_B6AD4779E3CB792FF3A3A54E6E9ECF7E" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_B6AD4779E3CB792FF3A3A54E6E9ECF7E" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_5006B6C23474B3EF3E41A54E6E9E97BC_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_5006B6C23474B3EF3E41A54E6E9E97BC" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net unrealized loss from securities, net of reclassification adjustment</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_5006B6C23474B3EF3E41A54E6E9E97BC_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_5006B6C23474B3EF3E41A54E6E9E97BC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_5006B6C23474B3EF3E41A54E6E9E97BC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_5006B6C23474B3EF3E41A54E6E9E97BC" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_5006B6C23474B3EF3E41A54E6E9E97BC" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_F12C8A54204881E0905BA54E6E9EED89_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_F12C8A54204881E0905BA54E6E9EED89" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension plan liability adjustment:</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_F12C8A54204881E0905BA54E6E9EED89_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_F12C8A54204881E0905BA54E6E9EED89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_F12C8A54204881E0905BA54E6E9EED89" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_F12C8A54204881E0905BA54E6E9EED89" xlink:to="lab_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_F12C8A54204881E0905BA54E6E9EED89" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_445F5C98B99045DCCD27A54E6E9E90AB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_445F5C98B99045DCCD27A54E6E9E90AB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Unrecognized net actuarial gain (loss) and plan amendments during the period, net of tax of ($7), ($2,287) and $22</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_445F5C98B99045DCCD27A54E6E9E90AB_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_445F5C98B99045DCCD27A54E6E9E90AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_445F5C98B99045DCCD27A54E6E9E90AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_445F5C98B99045DCCD27A54E6E9E90AB" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_445F5C98B99045DCCD27A54E6E9E90AB" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_51EF14521AD65A947676A54E6E9ED745_negatedLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_51EF14521AD65A947676A54E6E9ED745" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Less: amortization of unrecognized net actuarial losses included in net periodic pension cost, net of tax of ($74), ($127) and ($243)</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_51EF14521AD65A947676A54E6E9ED745_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_51EF14521AD65A947676A54E6E9ED745" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_51EF14521AD65A947676A54E6E9ED745" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_51EF14521AD65A947676A54E6E9ED745" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax_51EF14521AD65A947676A54E6E9ED745" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_DD296135D32DC5ACD2C3A54E6E9E8F40_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_DD296135D32DC5ACD2C3A54E6E9E8F40" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Pension plan liability adjustment, net</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_DD296135D32DC5ACD2C3A54E6E9E8F40_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_DD296135D32DC5ACD2C3A54E6E9E8F40" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_DD296135D32DC5ACD2C3A54E6E9E8F40" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_DD296135D32DC5ACD2C3A54E6E9E8F40" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_DD296135D32DC5ACD2C3A54E6E9E8F40" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_2A5CE8DFB0A62E3A2C3CA54E6EAE3832_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_2A5CE8DFB0A62E3A2C3CA54E6EAE3832" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_2A5CE8DFB0A62E3A2C3CA54E6EAE3832" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_2A5CE8DFB0A62E3A2C3CA54E6EAE3832" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_2A5CE8DFB0A62E3A2C3CA54E6EAE3832" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_24A1CC638DABD6678C63A54E6EAE3722_totalLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax_24A1CC638DABD6678C63A54E6EAE3722" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_24A1CC638DABD6678C63A54E6EAE3722_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax_24A1CC638DABD6678C63A54E6EAE3722" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_24A1CC638DABD6678C63A54E6EAE3722" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_24A1CC638DABD6678C63A54E6EAE3722" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTax_24A1CC638DABD6678C63A54E6EAE3722" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_3E750BF2618450F974CC5B4F07F94A3C_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_3E750BF2618450F974CC5B4F07F94A3C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations</link:label>
    <link:label id="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_3E750BF2618450F974CC5B4F07F94A3C_label_en-US" xlink:label="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_3E750BF2618450F974CC5B4F07F94A3C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock" xlink:label="loc_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_3E750BF2618450F974CC5B4F07F94A3C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_3E750BF2618450F974CC5B4F07F94A3C" xlink:to="lab_us-gaap_ScheduleOfComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_3E750BF2618450F974CC5B4F07F94A3C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountingPoliciesAbstract_A2672D22D8D6EBBAB9705B4F0A78CA5D_label_en-US" xlink:label="lab_us-gaap_AccountingPoliciesAbstract_A2672D22D8D6EBBAB9705B4F0A78CA5D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Policies [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_A2672D22D8D6EBBAB9705B4F0A78CA5D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_A2672D22D8D6EBBAB9705B4F0A78CA5D" xlink:to="lab_us-gaap_AccountingPoliciesAbstract_A2672D22D8D6EBBAB9705B4F0A78CA5D" xlink:type="arc" />
    <link:label id="lab_colb_AccountingPoliciesTable_0568BFAA674E92CA03525B4F0A78A501_terseLabel_en-US" xlink:label="lab_colb_AccountingPoliciesTable_0568BFAA674E92CA03525B4F0A78A501" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounting Policies [Table]</link:label>
    <link:label id="lab_colb_AccountingPoliciesTable_0568BFAA674E92CA03525B4F0A78A501_label_en-US" xlink:label="lab_colb_AccountingPoliciesTable_0568BFAA674E92CA03525B4F0A78A501" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Policies [Table]</link:label>
    <link:label id="lab_colb_AccountingPoliciesTable_0568BFAA674E92CA03525B4F0A78A501_documentation_en-US" xlink:label="lab_colb_AccountingPoliciesTable_0568BFAA674E92CA03525B4F0A78A501" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accounting Policies [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AccountingPoliciesTable" xlink:label="loc_colb_AccountingPoliciesTable_0568BFAA674E92CA03525B4F0A78A501" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AccountingPoliciesTable_0568BFAA674E92CA03525B4F0A78A501" xlink:to="lab_colb_AccountingPoliciesTable_0568BFAA674E92CA03525B4F0A78A501" xlink:type="arc" />
    <link:label id="lab_colb_AccountingPoliciesLineItems_6A0BDF37BA19CF76BAA65B4F0A78A6E8_terseLabel_en-US" xlink:label="lab_colb_AccountingPoliciesLineItems_6A0BDF37BA19CF76BAA65B4F0A78A6E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounting Policies [Line Items]</link:label>
    <link:label id="lab_colb_AccountingPoliciesLineItems_6A0BDF37BA19CF76BAA65B4F0A78A6E8_label_en-US" xlink:label="lab_colb_AccountingPoliciesLineItems_6A0BDF37BA19CF76BAA65B4F0A78A6E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Policies [Line Items]</link:label>
    <link:label id="lab_colb_AccountingPoliciesLineItems_6A0BDF37BA19CF76BAA65B4F0A78A6E8_documentation_en-US" xlink:label="lab_colb_AccountingPoliciesLineItems_6A0BDF37BA19CF76BAA65B4F0A78A6E8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accounting Policies [Line Items]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AccountingPoliciesLineItems" xlink:label="loc_colb_AccountingPoliciesLineItems_6A0BDF37BA19CF76BAA65B4F0A78A6E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AccountingPoliciesLineItems_6A0BDF37BA19CF76BAA65B4F0A78A6E8" xlink:to="lab_colb_AccountingPoliciesLineItems_6A0BDF37BA19CF76BAA65B4F0A78A6E8" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_2A8D8CA95326A44036405B4F0A789D5D_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_2A8D8CA95326A44036405B4F0A789D5D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_2A8D8CA95326A44036405B4F0A789D5D_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_2A8D8CA95326A44036405B4F0A789D5D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock_2A8D8CA95326A44036405B4F0A789D5D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock_2A8D8CA95326A44036405B4F0A789D5D" xlink:to="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_2A8D8CA95326A44036405B4F0A789D5D" xlink:type="arc" />
    <link:label id="lab_us-gaap_MarketableSecuritiesPolicy_5D9D9E70552DEF6D59195B4F0A785506_terseLabel_en-US" xlink:label="lab_us-gaap_MarketableSecuritiesPolicy_5D9D9E70552DEF6D59195B4F0A785506" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securities</link:label>
    <link:label id="lab_us-gaap_MarketableSecuritiesPolicy_5D9D9E70552DEF6D59195B4F0A785506_label_en-US" xlink:label="lab_us-gaap_MarketableSecuritiesPolicy_5D9D9E70552DEF6D59195B4F0A785506" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Marketable Securities, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MarketableSecuritiesPolicy" xlink:label="loc_us-gaap_MarketableSecuritiesPolicy_5D9D9E70552DEF6D59195B4F0A785506" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MarketableSecuritiesPolicy_5D9D9E70552DEF6D59195B4F0A785506" xlink:to="lab_us-gaap_MarketableSecuritiesPolicy_5D9D9E70552DEF6D59195B4F0A785506" xlink:type="arc" />
    <link:label id="lab_colb_FederalHomeLoanBankStockPolicyTextBlock_73305AA9663C1EE4CFF95B4F0A7868D4_terseLabel_en-US" xlink:label="lab_colb_FederalHomeLoanBankStockPolicyTextBlock_73305AA9663C1EE4CFF95B4F0A7868D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Stock</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankStockPolicyTextBlock_73305AA9663C1EE4CFF95B4F0A7868D4_label_en-US" xlink:label="lab_colb_FederalHomeLoanBankStockPolicyTextBlock_73305AA9663C1EE4CFF95B4F0A7868D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Stock [Policy Text Block]</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankStockPolicyTextBlock_73305AA9663C1EE4CFF95B4F0A7868D4_documentation_en-US" xlink:label="lab_colb_FederalHomeLoanBankStockPolicyTextBlock_73305AA9663C1EE4CFF95B4F0A7868D4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Stock [Policy Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalHomeLoanBankStockPolicyTextBlock" xlink:label="loc_colb_FederalHomeLoanBankStockPolicyTextBlock_73305AA9663C1EE4CFF95B4F0A7868D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalHomeLoanBankStockPolicyTextBlock_73305AA9663C1EE4CFF95B4F0A7868D4" xlink:to="lab_colb_FederalHomeLoanBankStockPolicyTextBlock_73305AA9663C1EE4CFF95B4F0A7868D4" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinanceLoansAndLeasesReceivablePolicy_B65CE85C2640E36C0A995B4F0A78BCA4_terseLabel_en-US" xlink:label="lab_us-gaap_FinanceLoansAndLeasesReceivablePolicy_B65CE85C2640E36C0A995B4F0A78BCA4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans</link:label>
    <link:label id="lab_us-gaap_FinanceLoansAndLeasesReceivablePolicy_B65CE85C2640E36C0A995B4F0A78BCA4_label_en-US" xlink:label="lab_us-gaap_FinanceLoansAndLeasesReceivablePolicy_B65CE85C2640E36C0A995B4F0A78BCA4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finance, Loans and Leases Receivable, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinanceLoansAndLeasesReceivablePolicy" xlink:label="loc_us-gaap_FinanceLoansAndLeasesReceivablePolicy_B65CE85C2640E36C0A995B4F0A78BCA4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinanceLoansAndLeasesReceivablePolicy_B65CE85C2640E36C0A995B4F0A78BCA4" xlink:to="lab_us-gaap_FinanceLoansAndLeasesReceivablePolicy_B65CE85C2640E36C0A995B4F0A78BCA4" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_225118F19FAA18D602B25B4F0A780D73_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_225118F19FAA18D602B25B4F0A780D73" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for Loan and Lease Losses</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_225118F19FAA18D602B25B4F0A780D73_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_225118F19FAA18D602B25B4F0A780D73" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_225118F19FAA18D602B25B4F0A780D73" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_225118F19FAA18D602B25B4F0A780D73" xlink:to="lab_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_225118F19FAA18D602B25B4F0A780D73" xlink:type="arc" />
    <link:label id="lab_colb_AllowanceForUnfundedCommitmentsAndLettersOfCreditPolicyTextBlock_51C5A8D593C9A044AA595B4F0A787E6C_terseLabel_en-US" xlink:label="lab_colb_AllowanceForUnfundedCommitmentsAndLettersOfCreditPolicyTextBlock_51C5A8D593C9A044AA595B4F0A787E6C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for Unfunded Commitments and Letters of Credit</link:label>
    <link:label id="lab_colb_AllowanceForUnfundedCommitmentsAndLettersOfCreditPolicyTextBlock_51C5A8D593C9A044AA595B4F0A787E6C_label_en-US" xlink:label="lab_colb_AllowanceForUnfundedCommitmentsAndLettersOfCreditPolicyTextBlock_51C5A8D593C9A044AA595B4F0A787E6C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance for Unfunded Commitments and Letters of Credit [Policy Text Block]</link:label>
    <link:label id="lab_colb_AllowanceForUnfundedCommitmentsAndLettersOfCreditPolicyTextBlock_51C5A8D593C9A044AA595B4F0A787E6C_documentation_en-US" xlink:label="lab_colb_AllowanceForUnfundedCommitmentsAndLettersOfCreditPolicyTextBlock_51C5A8D593C9A044AA595B4F0A787E6C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Allowance for Unfunded Commitments and Letters of Credit [Policy Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AllowanceForUnfundedCommitmentsAndLettersOfCreditPolicyTextBlock" xlink:label="loc_colb_AllowanceForUnfundedCommitmentsAndLettersOfCreditPolicyTextBlock_51C5A8D593C9A044AA595B4F0A787E6C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AllowanceForUnfundedCommitmentsAndLettersOfCreditPolicyTextBlock_51C5A8D593C9A044AA595B4F0A787E6C" xlink:to="lab_colb_AllowanceForUnfundedCommitmentsAndLettersOfCreditPolicyTextBlock_51C5A8D593C9A044AA595B4F0A787E6C" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_EBD5580365BC5912DBE35B4F0A7866D5_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_EBD5580365BC5912DBE35B4F0A7866D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premises and Equipment</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_EBD5580365BC5912DBE35B4F0A7866D5_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_EBD5580365BC5912DBE35B4F0A7866D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_EBD5580365BC5912DBE35B4F0A7866D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_EBD5580365BC5912DBE35B4F0A7866D5" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_EBD5580365BC5912DBE35B4F0A7866D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_InternalUseSoftwarePolicy_D3ABBDA7439534A890015B4F0A788F16_terseLabel_en-US" xlink:label="lab_us-gaap_InternalUseSoftwarePolicy_D3ABBDA7439534A890015B4F0A788F16" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Software</link:label>
    <link:label id="lab_us-gaap_InternalUseSoftwarePolicy_D3ABBDA7439534A890015B4F0A788F16_label_en-US" xlink:label="lab_us-gaap_InternalUseSoftwarePolicy_D3ABBDA7439534A890015B4F0A788F16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Internal Use Software, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InternalUseSoftwarePolicy" xlink:label="loc_us-gaap_InternalUseSoftwarePolicy_D3ABBDA7439534A890015B4F0A788F16" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InternalUseSoftwarePolicy_D3ABBDA7439534A890015B4F0A788F16" xlink:to="lab_us-gaap_InternalUseSoftwarePolicy_D3ABBDA7439534A890015B4F0A788F16" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableRealEstateAcquiredThroughForeclosurePolicy_DE61A15A86F88C5BCD385B4F0A78DBA3_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableRealEstateAcquiredThroughForeclosurePolicy_DE61A15A86F88C5BCD385B4F0A78DBA3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned&#8212;Noncovered</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableRealEstateAcquiredThroughForeclosurePolicy_DE61A15A86F88C5BCD385B4F0A78DBA3_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableRealEstateAcquiredThroughForeclosurePolicy_DE61A15A86F88C5BCD385B4F0A78DBA3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Real Estate Acquired Through Foreclosure, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableRealEstateAcquiredThroughForeclosurePolicy" xlink:label="loc_us-gaap_LoansAndLeasesReceivableRealEstateAcquiredThroughForeclosurePolicy_DE61A15A86F88C5BCD385B4F0A78DBA3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableRealEstateAcquiredThroughForeclosurePolicy_DE61A15A86F88C5BCD385B4F0A78DBA3" xlink:to="lab_us-gaap_LoansAndLeasesReceivableRealEstateAcquiredThroughForeclosurePolicy_DE61A15A86F88C5BCD385B4F0A78DBA3" xlink:type="arc" />
    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_FBB739DE86B332C5AACE5B4F0A78A92B_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_FBB739DE86B332C5AACE5B4F0A78A92B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill and Intangibles</link:label>
    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_FBB739DE86B332C5AACE5B4F0A78A92B_label_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_FBB739DE86B332C5AACE5B4F0A78A92B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_FBB739DE86B332C5AACE5B4F0A78A92B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_FBB739DE86B332C5AACE5B4F0A78A92B" xlink:to="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_FBB739DE86B332C5AACE5B4F0A78A92B" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_1FEFB2F0EFA3828E65B05B4F0A78070F_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock_1FEFB2F0EFA3828E65B05B4F0A78070F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxPolicyTextBlock_1FEFB2F0EFA3828E65B05B4F0A78070F_label_en-US" xlink:label="lab_us-gaap_IncomeTaxPolicyTextBlock_1FEFB2F0EFA3828E65B05B4F0A78070F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="loc_us-gaap_IncomeTaxPolicyTextBlock_1FEFB2F0EFA3828E65B05B4F0A78070F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxPolicyTextBlock_1FEFB2F0EFA3828E65B05B4F0A78070F" xlink:to="lab_us-gaap_IncomeTaxPolicyTextBlock_1FEFB2F0EFA3828E65B05B4F0A78070F" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerSharePolicyTextBlock_4EFD6F746AAC3B75F1AA5B4F0A7810D9_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerSharePolicyTextBlock_4EFD6F746AAC3B75F1AA5B4F0A7810D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings per Common Share</link:label>
    <link:label id="lab_us-gaap_EarningsPerSharePolicyTextBlock_4EFD6F746AAC3B75F1AA5B4F0A7810D9_label_en-US" xlink:label="lab_us-gaap_EarningsPerSharePolicyTextBlock_4EFD6F746AAC3B75F1AA5B4F0A7810D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="loc_us-gaap_EarningsPerSharePolicyTextBlock_4EFD6F746AAC3B75F1AA5B4F0A7810D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerSharePolicyTextBlock_4EFD6F746AAC3B75F1AA5B4F0A7810D9" xlink:to="lab_us-gaap_EarningsPerSharePolicyTextBlock_4EFD6F746AAC3B75F1AA5B4F0A7810D9" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost_94ABEB5C453ADFA657065B4F0A7810AC_terseLabel_en-US" xlink:label="lab_us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost_94ABEB5C453ADFA657065B4F0A7810AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advertising</link:label>
    <link:label id="lab_us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost_94ABEB5C453ADFA657065B4F0A7810AC_label_en-US" xlink:label="lab_us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost_94ABEB5C453ADFA657065B4F0A7810AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advertising Cost, Policy, Expensed Advertising Cost [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost" xlink:label="loc_us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost_94ABEB5C453ADFA657065B4F0A7810AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost_94ABEB5C453ADFA657065B4F0A7810AC" xlink:to="lab_us-gaap_AdvertisingCostPolicyExpensedAdvertisingCost_94ABEB5C453ADFA657065B4F0A7810AC" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_CC965F96224E45DA9AFE5B4F0A788819_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_CC965F96224E45DA9AFE5B4F0A788819" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-Based Payment</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_CC965F96224E45DA9AFE5B4F0A788819_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_CC965F96224E45DA9AFE5B4F0A788819" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:label="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_CC965F96224E45DA9AFE5B4F0A788819" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_CC965F96224E45DA9AFE5B4F0A788819" xlink:to="lab_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_CC965F96224E45DA9AFE5B4F0A788819" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativesPolicyTextBlock_77972E42B8F42E1E00BF5B4F0A783E52_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativesPolicyTextBlock_77972E42B8F42E1E00BF5B4F0A783E52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivatives and Hedging Activities</link:label>
    <link:label id="lab_us-gaap_DerivativesPolicyTextBlock_77972E42B8F42E1E00BF5B4F0A783E52_label_en-US" xlink:label="lab_us-gaap_DerivativesPolicyTextBlock_77972E42B8F42E1E00BF5B4F0A783E52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivatives, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativesPolicyTextBlock" xlink:label="loc_us-gaap_DerivativesPolicyTextBlock_77972E42B8F42E1E00BF5B4F0A783E52" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativesPolicyTextBlock_77972E42B8F42E1E00BF5B4F0A783E52" xlink:to="lab_us-gaap_DerivativesPolicyTextBlock_77972E42B8F42E1E00BF5B4F0A783E52" xlink:type="arc" />
    <link:label id="lab_colb_JuniorsubordinateddebenturesAbstract_DF20AC23F10C31838821A54E6C3E9484_label_en-US" xlink:label="lab_colb_JuniorsubordinateddebenturesAbstract_DF20AC23F10C31838821A54E6C3E9484" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Junior subordinated debentures [Abstract]</link:label>
    <link:label id="lab_colb_JuniorsubordinateddebenturesAbstract_DF20AC23F10C31838821A54E6C3E9484_documentation_en-US" xlink:label="lab_colb_JuniorsubordinateddebenturesAbstract_DF20AC23F10C31838821A54E6C3E9484" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Junior subordinated debentures [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_JuniorsubordinateddebenturesAbstract" xlink:label="loc_colb_JuniorsubordinateddebenturesAbstract_DF20AC23F10C31838821A54E6C3E9484" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_JuniorsubordinateddebenturesAbstract_DF20AC23F10C31838821A54E6C3E9484" xlink:to="lab_colb_JuniorsubordinateddebenturesAbstract_DF20AC23F10C31838821A54E6C3E9484" xlink:type="arc" />
    <link:label id="lab_colb_JuniorsubordinateddebenturesTable_983A659A0B0BC20B3DABA54E6C3E6E81_label_en-US" xlink:label="lab_colb_JuniorsubordinateddebenturesTable_983A659A0B0BC20B3DABA54E6C3E6E81" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">junior subordinated debentures [Table]</link:label>
    <link:label id="lab_colb_JuniorsubordinateddebenturesTable_983A659A0B0BC20B3DABA54E6C3E6E81_documentation_en-US" xlink:label="lab_colb_JuniorsubordinateddebenturesTable_983A659A0B0BC20B3DABA54E6C3E6E81" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">junior subordinated debentures [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_JuniorsubordinateddebenturesTable" xlink:label="loc_colb_JuniorsubordinateddebenturesTable_983A659A0B0BC20B3DABA54E6C3E6E81" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_JuniorsubordinateddebenturesTable_983A659A0B0BC20B3DABA54E6C3E6E81" xlink:to="lab_colb_JuniorsubordinateddebenturesTable_983A659A0B0BC20B3DABA54E6C3E6E81" xlink:type="arc" />
    <link:label id="lab_colb_JuniorsubordinateddebenturesLineItems_DECB9BC00B9F5B291BCEA54E6C3EFD95_terseLabel_en-US" xlink:label="lab_colb_JuniorsubordinateddebenturesLineItems_DECB9BC00B9F5B291BCEA54E6C3EFD95" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">junior subordinated debentures [Line Items]</link:label>
    <link:label id="lab_colb_JuniorsubordinateddebenturesLineItems_DECB9BC00B9F5B291BCEA54E6C3EFD95_label_en-US" xlink:label="lab_colb_JuniorsubordinateddebenturesLineItems_DECB9BC00B9F5B291BCEA54E6C3EFD95" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">junior subordinated debentures [Line Items]</link:label>
    <link:label id="lab_colb_JuniorsubordinateddebenturesLineItems_DECB9BC00B9F5B291BCEA54E6C3EFD95_documentation_en-US" xlink:label="lab_colb_JuniorsubordinateddebenturesLineItems_DECB9BC00B9F5B291BCEA54E6C3EFD95" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Line Items] for junior subordinated debentures [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_JuniorsubordinateddebenturesLineItems" xlink:label="loc_colb_JuniorsubordinateddebenturesLineItems_DECB9BC00B9F5B291BCEA54E6C3EFD95" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_JuniorsubordinateddebenturesLineItems_DECB9BC00B9F5B291BCEA54E6C3EFD95" xlink:to="lab_colb_JuniorsubordinateddebenturesLineItems_DECB9BC00B9F5B291BCEA54E6C3EFD95" xlink:type="arc" />
    <link:label id="lab_us-gaap_RepaymentsOfSubordinatedDebt_CD1E273A18E153530830A54E6C3EA3D9_terseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfSubordinatedDebt_CD1E273A18E153530830A54E6C3EA3D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repayments of Subordinated Debt</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfSubordinatedDebt_CD1E273A18E153530830A54E6C3EA3D9_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfSubordinatedDebt_CD1E273A18E153530830A54E6C3EA3D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Subordinated Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfSubordinatedDebt" xlink:label="loc_us-gaap_RepaymentsOfSubordinatedDebt_CD1E273A18E153530830A54E6C3EA3D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfSubordinatedDebt_CD1E273A18E153530830A54E6C3EA3D9" xlink:to="lab_us-gaap_RepaymentsOfSubordinatedDebt_CD1E273A18E153530830A54E6C3EA3D9" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_C18AD46EBF358A7BBB6FA54E6C3ECED4_terseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_C18AD46EBF358A7BBB6FA54E6C3ECED4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Junior Subordinated Debentures</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_C18AD46EBF358A7BBB6FA54E6C3ECED4_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_C18AD46EBF358A7BBB6FA54E6C3ECED4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Junior Subordinated Debentures</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_C18AD46EBF358A7BBB6FA54E6C3ECED4_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_C18AD46EBF358A7BBB6FA54E6C3ECED4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Junior Subordinated Debentures</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_C18AD46EBF358A7BBB6FA54E6C3ECED4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_C18AD46EBF358A7BBB6FA54E6C3ECED4" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_C18AD46EBF358A7BBB6FA54E6C3ECED4" xlink:type="arc" />
    <link:label id="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsAbstract_C350DFC3F1D6DE0CDEF207D77AF2AE6B_label_en-US" xlink:label="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsAbstract_C350DFC3F1D6DE0CDEF207D77AF2AE6B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank and Federal Reserve Bank Borrowings [Abstract]</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsAbstract_C350DFC3F1D6DE0CDEF207D77AF2AE6B_documentation_en-US" xlink:label="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsAbstract_C350DFC3F1D6DE0CDEF207D77AF2AE6B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank and Federal Reserve Bank Borrowings [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsAbstract" xlink:label="loc_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsAbstract_C350DFC3F1D6DE0CDEF207D77AF2AE6B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsAbstract_C350DFC3F1D6DE0CDEF207D77AF2AE6B" xlink:to="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsAbstract_C350DFC3F1D6DE0CDEF207D77AF2AE6B" xlink:type="arc" />
    <link:label id="lab_colb_DebtInstrumentsTable_B7EF55D87A80CBCEC69407D77AF2FDEC_label_en-US" xlink:label="lab_colb_DebtInstrumentsTable_B7EF55D87A80CBCEC69407D77AF2FDEC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instruments [Table]</link:label>
    <link:label id="lab_colb_DebtInstrumentsTable_B7EF55D87A80CBCEC69407D77AF2FDEC_documentation_en-US" xlink:label="lab_colb_DebtInstrumentsTable_B7EF55D87A80CBCEC69407D77AF2FDEC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instruments [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DebtInstrumentsTable" xlink:label="loc_colb_DebtInstrumentsTable_B7EF55D87A80CBCEC69407D77AF2FDEC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DebtInstrumentsTable_B7EF55D87A80CBCEC69407D77AF2FDEC" xlink:to="lab_colb_DebtInstrumentsTable_B7EF55D87A80CBCEC69407D77AF2FDEC" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_FEB87539164410FF26C807D77AF30A89_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_FEB87539164410FF26C807D77AF30A89" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_FEB87539164410FF26C807D77AF30A89" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_FEB87539164410FF26C807D77AF30A89" xlink:to="lab_us-gaap_DebtInstrumentNameDomain_FEB87539164410FF26C807D77AF30A89" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalReserveBankAdvancesMember_37A3719DD34059EBD6B907D77AF34DD0_label_en-US" xlink:label="lab_us-gaap_FederalReserveBankAdvancesMember_37A3719DD34059EBD6B907D77AF34DD0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank Advances [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalReserveBankAdvancesMember" xlink:label="loc_us-gaap_FederalReserveBankAdvancesMember_37A3719DD34059EBD6B907D77AF34DD0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalReserveBankAdvancesMember_37A3719DD34059EBD6B907D77AF34DD0" xlink:to="lab_us-gaap_FederalReserveBankAdvancesMember_37A3719DD34059EBD6B907D77AF34DD0" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentLineItems_59C62259DBDEA0C4B2A007D77AF5BB85_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_59C62259DBDEA0C4B2A007D77AF5BB85" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_59C62259DBDEA0C4B2A007D77AF5BB85" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentLineItems_59C62259DBDEA0C4B2A007D77AF5BB85" xlink:to="lab_us-gaap_DebtInstrumentLineItems_59C62259DBDEA0C4B2A007D77AF5BB85" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract_D61E8685E1B67B740EA707D77AF5F2C5_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract_D61E8685E1B67B740EA707D77AF5F2C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FHLB Fixed Rate Advances, Maturities Summary [Abstract]</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract_D61E8685E1B67B740EA707D77AF5F2C5_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract_D61E8685E1B67B740EA707D77AF5F2C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Fiscal Year Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract_D61E8685E1B67B740EA707D77AF5F2C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract_D61E8685E1B67B740EA707D77AF5F2C5" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAbstract_D61E8685E1B67B740EA707D77AF5F2C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate_102DC9AFDD1BA0A1ABB907D77AF595BA_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate_102DC9AFDD1BA0A1ABB907D77AF595BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate of Amounts Due within One Year of Balance Sheet Date</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate_102DC9AFDD1BA0A1ABB907D77AF595BA_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate_102DC9AFDD1BA0A1ABB907D77AF595BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate of Amounts Due within One Year of Balance Sheet Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate_102DC9AFDD1BA0A1ABB907D77AF595BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate_102DC9AFDD1BA0A1ABB907D77AF595BA" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOfAmountsDueWithinOneYearOfBalanceSheetDate_102DC9AFDD1BA0A1ABB907D77AF595BA" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateUnderOneYear_3AE98FE691DAAA41DFA707D77AF543F9_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateUnderOneYear_3AE98FE691DAAA41DFA707D77AF543F9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate, under One Year</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateUnderOneYear_3AE98FE691DAAA41DFA707D77AF543F9_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateUnderOneYear_3AE98FE691DAAA41DFA707D77AF543F9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate, under One Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateUnderOneYear" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateUnderOneYear_3AE98FE691DAAA41DFA707D77AF543F9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateUnderOneYear_3AE98FE691DAAA41DFA707D77AF543F9" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateUnderOneYear_3AE98FE691DAAA41DFA707D77AF543F9" xlink:type="arc" />
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToFiveYearsFromBalanceSheetDate_7FA483ED4B773DF591AE07D77AF53E78_terseLabel_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToFiveYearsFromBalanceSheetDate_7FA483ED4B773DF591AE07D77AF53E78" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, One To Five Years From Balance Sheet Date</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToFiveYearsFromBalanceSheetDate_7FA483ED4B773DF591AE07D77AF53E78_label_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToFiveYearsFromBalanceSheetDate_7FA483ED4B773DF591AE07D77AF53E78" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, One To Five Years From Balance Sheet Date</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToFiveYearsFromBalanceSheetDate_7FA483ED4B773DF591AE07D77AF53E78_documentation_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToFiveYearsFromBalanceSheetDate_7FA483ED4B773DF591AE07D77AF53E78" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Weighted Average Interest Rate, One To Five Years From Balance Sheet Date</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToFiveYearsFromBalanceSheetDate" xlink:label="loc_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToFiveYearsFromBalanceSheetDate_7FA483ED4B773DF591AE07D77AF53E78" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToFiveYearsFromBalanceSheetDate_7FA483ED4B773DF591AE07D77AF53E78" xlink:to="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateOneToFiveYearsFromBalanceSheetDate_7FA483ED4B773DF591AE07D77AF53E78" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateOneToFiveYears_796FF69CE6CCCE3D76D207D77AF6CE22_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateOneToFiveYears_796FF69CE6CCCE3D76D207D77AF6CE22" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FHLB Fixed Rate Advances, Over 1 through 5 years</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateOneToFiveYears_796FF69CE6CCCE3D76D207D77AF6CE22_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateOneToFiveYears_796FF69CE6CCCE3D76D207D77AF6CE22" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate, One to Five Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateOneToFiveYears" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateOneToFiveYears_796FF69CE6CCCE3D76D207D77AF6CE22" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateOneToFiveYears_796FF69CE6CCCE3D76D207D77AF6CE22" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateOneToFiveYears_796FF69CE6CCCE3D76D207D77AF6CE22" xlink:type="arc" />
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterTenYearsFromBalanceSheetDate_3CE0A205B54787D93BC407D77AF6BAE7_terseLabel_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterTenYearsFromBalanceSheetDate_3CE0A205B54787D93BC407D77AF6BAE7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FHLB Fixed Rate Advances, Weighted Average Interest Rate, Due after 10 years</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterTenYearsFromBalanceSheetDate_3CE0A205B54787D93BC407D77AF6BAE7_label_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterTenYearsFromBalanceSheetDate_3CE0A205B54787D93BC407D77AF6BAE7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, after Ten Years from Balance Sheet Date</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterTenYearsFromBalanceSheetDate_3CE0A205B54787D93BC407D77AF6BAE7_documentation_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterTenYearsFromBalanceSheetDate_3CE0A205B54787D93BC407D77AF6BAE7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, after Ten Years from Balance Sheet Date</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterTenYearsFromBalanceSheetDate" xlink:label="loc_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterTenYearsFromBalanceSheetDate_3CE0A205B54787D93BC407D77AF6BAE7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterTenYearsFromBalanceSheetDate_3CE0A205B54787D93BC407D77AF6BAE7" xlink:to="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryAverageInterestRateAfterTenYearsFromBalanceSheetDate_3CE0A205B54787D93BC407D77AF6BAE7" xlink:type="arc" />
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateAfterTenYears_CB32297E5EDEDA41163B07D77AF66910_terseLabel_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateAfterTenYears_CB32297E5EDEDA41163B07D77AF66910" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FHLB Fixed Rate Advances, Due after 10 years</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateAfterTenYears_CB32297E5EDEDA41163B07D77AF66910_label_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateAfterTenYears_CB32297E5EDEDA41163B07D77AF66910" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary by Interest Rate Type, Fixed Rate, after Ten Years</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateAfterTenYears_CB32297E5EDEDA41163B07D77AF66910_documentation_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateAfterTenYears_CB32297E5EDEDA41163B07D77AF66910" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary by Interest Rate Type, Fixed Rate, after Ten Years</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateAfterTenYears" xlink:label="loc_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateAfterTenYears_CB32297E5EDEDA41163B07D77AF66910" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateAfterTenYears_CB32297E5EDEDA41163B07D77AF66910" xlink:to="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateAfterTenYears_CB32297E5EDEDA41163B07D77AF66910" xlink:type="arc" />
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateBeforeValuationAdjustment_89D438C0188E1DBF246907D77AF6AFB0_totalLabel_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateBeforeValuationAdjustment_89D438C0188E1DBF246907D77AF6AFB0" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">FHLB Fixed Rate Advances, Total Amount before valuation adjustment</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateBeforeValuationAdjustment_89D438C0188E1DBF246907D77AF6AFB0_label_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateBeforeValuationAdjustment_89D438C0188E1DBF246907D77AF6AFB0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary by Interest Rate Type, Fixed Rate, Before Valuation Adjustment</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateBeforeValuationAdjustment_89D438C0188E1DBF246907D77AF6AFB0_documentation_en-US" xlink:label="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateBeforeValuationAdjustment_89D438C0188E1DBF246907D77AF6AFB0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary by Interest Rate Type, Fixed Rate, Before Valuation Adjustment</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateBeforeValuationAdjustment" xlink:label="loc_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateBeforeValuationAdjustment_89D438C0188E1DBF246907D77AF6AFB0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateBeforeValuationAdjustment_89D438C0188E1DBF246907D77AF6AFB0" xlink:to="lab_colb_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRateBeforeValuationAdjustment_89D438C0188E1DBF246907D77AF6AFB0" xlink:type="arc" />
    <link:label id="lab_colb_FederalHomeLoanBankFixedRateAdvancesValuationAdjustmentFromAcquisitionAccounting_099AFA516E3A1E06D45307D77AF6149E_terseLabel_en-US" xlink:label="lab_colb_FederalHomeLoanBankFixedRateAdvancesValuationAdjustmentFromAcquisitionAccounting_099AFA516E3A1E06D45307D77AF6149E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Valuation adjustment from acquisition accounting</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankFixedRateAdvancesValuationAdjustmentFromAcquisitionAccounting_099AFA516E3A1E06D45307D77AF6149E_label_en-US" xlink:label="lab_colb_FederalHomeLoanBankFixedRateAdvancesValuationAdjustmentFromAcquisitionAccounting_099AFA516E3A1E06D45307D77AF6149E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Fixed Rate Advances, Valuation Adjustment From Acquisition Accounting</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankFixedRateAdvancesValuationAdjustmentFromAcquisitionAccounting_099AFA516E3A1E06D45307D77AF6149E_documentation_en-US" xlink:label="lab_colb_FederalHomeLoanBankFixedRateAdvancesValuationAdjustmentFromAcquisitionAccounting_099AFA516E3A1E06D45307D77AF6149E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Fixed Rate Advances, Valuation Adjustment From Acquisition Accounting</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalHomeLoanBankFixedRateAdvancesValuationAdjustmentFromAcquisitionAccounting" xlink:label="loc_colb_FederalHomeLoanBankFixedRateAdvancesValuationAdjustmentFromAcquisitionAccounting_099AFA516E3A1E06D45307D77AF6149E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalHomeLoanBankFixedRateAdvancesValuationAdjustmentFromAcquisitionAccounting_099AFA516E3A1E06D45307D77AF6149E" xlink:to="lab_colb_FederalHomeLoanBankFixedRateAdvancesValuationAdjustmentFromAcquisitionAccounting_099AFA516E3A1E06D45307D77AF6149E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRate_45C4B02D6FF7A4E616FF07D77AF6C01F_totalLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRate_45C4B02D6FF7A4E616FF07D77AF6C01F" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">FHLB Fixed Rate Advances, Total Amount</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRate_45C4B02D6FF7A4E616FF07D77AF6C01F_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRate_45C4B02D6FF7A4E616FF07D77AF6C01F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRate" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRate_45C4B02D6FF7A4E616FF07D77AF6C01F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRate_45C4B02D6FF7A4E616FF07D77AF6C01F" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryByInterestRateTypeFixedRate_45C4B02D6FF7A4E616FF07D77AF6C01F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAbstract_13694C1900D6467F797907D77AF787AB_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAbstract_13694C1900D6467F797907D77AF787AB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Activity for Year [Abstract]</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAbstract_13694C1900D6467F797907D77AF787AB_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAbstract_13694C1900D6467F797907D77AF787AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Activity for Year [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesActivityForYearAbstract" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAbstract_13694C1900D6467F797907D77AF787AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAbstract_13694C1900D6467F797907D77AF787AB" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAbstract_13694C1900D6467F797907D77AF787AB" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesLongTerm_7E22FA497E39D1FDE1A907D77AF7C506_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesLongTerm_7E22FA497E39D1FDE1A907D77AF7C506" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FHLB Advances</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesLongTerm_7E22FA497E39D1FDE1A907D77AF7C506_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesLongTerm_7E22FA497E39D1FDE1A907D77AF7C506" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Federal Home Loan Bank Advances</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesLongTerm" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesLongTerm_7E22FA497E39D1FDE1A907D77AF7C506" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesLongTerm_7E22FA497E39D1FDE1A907D77AF7C506" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesLongTerm_7E22FA497E39D1FDE1A907D77AF7C506" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding_8A94423702FA69D95D9A07D77AF75025_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding_8A94423702FA69D95D9A07D77AF75025" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Activity for Year, Average Balance of Agreements Outstanding</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding_8A94423702FA69D95D9A07D77AF75025_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding_8A94423702FA69D95D9A07D77AF75025" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Activity for Year, Average Balance of Agreements Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding_8A94423702FA69D95D9A07D77AF75025" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding_8A94423702FA69D95D9A07D77AF75025" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding_8A94423702FA69D95D9A07D77AF75025" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd_AF2E289A641A3C174F4807D77AF7B08B_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd_AF2E289A641A3C174F4807D77AF7B08B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum month-end balance during the year</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd_AF2E289A641A3C174F4807D77AF7B08B_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd_AF2E289A641A3C174F4807D77AF7B08B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Activity for Year, Maximum Outstanding at any Month End</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd_AF2E289A641A3C174F4807D77AF7B08B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd_AF2E289A641A3C174F4807D77AF7B08B" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd_AF2E289A641A3C174F4807D77AF7B08B" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear_FAF24FB15532E3019AC707D77AF83F4D_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear_FAF24FB15532E3019AC707D77AF83F4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average rate during the year</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear_FAF24FB15532E3019AC707D77AF83F4D_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear_FAF24FB15532E3019AC707D77AF83F4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate for Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear_FAF24FB15532E3019AC707D77AF83F4D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear_FAF24FB15532E3019AC707D77AF83F4D" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear_FAF24FB15532E3019AC707D77AF83F4D" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd_1725DA51D92D868E612D07D77AF8087F_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd_1725DA51D92D868E612D07D77AF8087F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average rate at December 31</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd_1725DA51D92D868E612D07D77AF8087F_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd_1725DA51D92D868E612D07D77AF8087F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, Activity for Year, Average Interest Rate at Period End</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd_1725DA51D92D868E612D07D77AF8087F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd_1725DA51D92D868E612D07D77AF8087F" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateAtPeriodEnd_1725DA51D92D868E612D07D77AF8087F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable_DE398A8B5ABF0831E71207D77AF8BA42_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable_DE398A8B5ABF0831E71207D77AF8BA42" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FHLB Borrowing Capacity</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable_DE398A8B5ABF0831E71207D77AF8BA42_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable_DE398A8B5ABF0831E71207D77AF8BA42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable_DE398A8B5ABF0831E71207D77AF8BA42" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable_DE398A8B5ABF0831E71207D77AF8BA42" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresMaximumAmountAvailable_DE398A8B5ABF0831E71207D77AF8BA42" xlink:type="arc" />
    <link:label id="lab_colb_FederalReserveBankAdvancesActivityForYearAbstract_8E838E43854C93D0221A07D77AF87262_label_en-US" xlink:label="lab_colb_FederalReserveBankAdvancesActivityForYearAbstract_8E838E43854C93D0221A07D77AF87262" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank, Advances, Activity for Year [Abstract]</link:label>
    <link:label id="lab_colb_FederalReserveBankAdvancesActivityForYearAbstract_8E838E43854C93D0221A07D77AF87262_documentation_en-US" xlink:label="lab_colb_FederalReserveBankAdvancesActivityForYearAbstract_8E838E43854C93D0221A07D77AF87262" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank, Advances, Activity for Year [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalReserveBankAdvancesActivityForYearAbstract" xlink:label="loc_colb_FederalReserveBankAdvancesActivityForYearAbstract_8E838E43854C93D0221A07D77AF87262" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalReserveBankAdvancesActivityForYearAbstract_8E838E43854C93D0221A07D77AF87262" xlink:to="lab_colb_FederalReserveBankAdvancesActivityForYearAbstract_8E838E43854C93D0221A07D77AF87262" xlink:type="arc" />
    <link:label id="lab_colb_FederalReserveBankAdvancesActivityfortheyearaveragebalanceofagreementsoutstanding_24BD2003955B061F989207D77AF82FAC_terseLabel_en-US" xlink:label="lab_colb_FederalReserveBankAdvancesActivityfortheyearaveragebalanceofagreementsoutstanding_24BD2003955B061F989207D77AF82FAC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average balance during the year</link:label>
    <link:label id="lab_colb_FederalReserveBankAdvancesActivityfortheyearaveragebalanceofagreementsoutstanding_24BD2003955B061F989207D77AF82FAC_label_en-US" xlink:label="lab_colb_FederalReserveBankAdvancesActivityfortheyearaveragebalanceofagreementsoutstanding_24BD2003955B061F989207D77AF82FAC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank, Advances, Activity for the year, average balance of agreements outstanding</link:label>
    <link:label id="lab_colb_FederalReserveBankAdvancesActivityfortheyearaveragebalanceofagreementsoutstanding_24BD2003955B061F989207D77AF82FAC_documentation_en-US" xlink:label="lab_colb_FederalReserveBankAdvancesActivityfortheyearaveragebalanceofagreementsoutstanding_24BD2003955B061F989207D77AF82FAC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank, Advances, Activity for the year, average balance of agreements outstanding</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalReserveBankAdvancesActivityfortheyearaveragebalanceofagreementsoutstanding" xlink:label="loc_colb_FederalReserveBankAdvancesActivityfortheyearaveragebalanceofagreementsoutstanding_24BD2003955B061F989207D77AF82FAC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalReserveBankAdvancesActivityfortheyearaveragebalanceofagreementsoutstanding_24BD2003955B061F989207D77AF82FAC" xlink:to="lab_colb_FederalReserveBankAdvancesActivityfortheyearaveragebalanceofagreementsoutstanding_24BD2003955B061F989207D77AF82FAC" xlink:type="arc" />
    <link:label id="lab_colb_FederalReserveBankAdvancesMaximumAmountAvailable_1B4DCCB4F0DF68E3540807D77AF85994_terseLabel_en-US" xlink:label="lab_colb_FederalReserveBankAdvancesMaximumAmountAvailable_1B4DCCB4F0DF68E3540807D77AF85994" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank borrowing capacity</link:label>
    <link:label id="lab_colb_FederalReserveBankAdvancesMaximumAmountAvailable_1B4DCCB4F0DF68E3540807D77AF85994_label_en-US" xlink:label="lab_colb_FederalReserveBankAdvancesMaximumAmountAvailable_1B4DCCB4F0DF68E3540807D77AF85994" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank, Advances, Maximum Amount Available</link:label>
    <link:label id="lab_colb_FederalReserveBankAdvancesMaximumAmountAvailable_1B4DCCB4F0DF68E3540807D77AF85994_documentation_en-US" xlink:label="lab_colb_FederalReserveBankAdvancesMaximumAmountAvailable_1B4DCCB4F0DF68E3540807D77AF85994" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank, Advances, Maximum Amount Available</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalReserveBankAdvancesMaximumAmountAvailable" xlink:label="loc_colb_FederalReserveBankAdvancesMaximumAmountAvailable_1B4DCCB4F0DF68E3540807D77AF85994" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalReserveBankAdvancesMaximumAmountAvailable_1B4DCCB4F0DF68E3540807D77AF85994" xlink:to="lab_colb_FederalReserveBankAdvancesMaximumAmountAvailable_1B4DCCB4F0DF68E3540807D77AF85994" xlink:type="arc" />
    <link:label id="lab_us-gaap_RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_71CF8DD38BE2D3AD94A507591195C6AA_terseLabel_en-US" xlink:label="lab_us-gaap_RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_71CF8DD38BE2D3AD94A507591195C6AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Regulatory Capital Requirements</link:label>
    <link:label id="lab_us-gaap_RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_71CF8DD38BE2D3AD94A507591195C6AA_label_en-US" xlink:label="lab_us-gaap_RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_71CF8DD38BE2D3AD94A507591195C6AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Regulatory Capital Requirements under Banking Regulations [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock" xlink:label="loc_us-gaap_RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_71CF8DD38BE2D3AD94A507591195C6AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_71CF8DD38BE2D3AD94A507591195C6AA" xlink:to="lab_us-gaap_RegulatoryCapitalRequirementsUnderBankingRegulationsTextBlock_71CF8DD38BE2D3AD94A507591195C6AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityAbstract_2A38A0DC93A22018AE35F29DA40AF63F_label_en-US" xlink:label="lab_us-gaap_EquityAbstract_2A38A0DC93A22018AE35F29DA40AF63F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquityAbstract" xlink:label="loc_us-gaap_EquityAbstract_2A38A0DC93A22018AE35F29DA40AF63F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityAbstract_2A38A0DC93A22018AE35F29DA40AF63F" xlink:to="lab_us-gaap_EquityAbstract_2A38A0DC93A22018AE35F29DA40AF63F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DividendsDeclaredTableTextBlock_03336F4D17D7C6B796B3F29DA40CF1C7_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsDeclaredTableTextBlock_03336F4D17D7C6B796B3F29DA40CF1C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends, Common Stock, Cash</link:label>
    <link:label id="lab_us-gaap_DividendsDeclaredTableTextBlock_03336F4D17D7C6B796B3F29DA40CF1C7_label_en-US" xlink:label="lab_us-gaap_DividendsDeclaredTableTextBlock_03336F4D17D7C6B796B3F29DA40CF1C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Declared [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsDeclaredTableTextBlock" xlink:label="loc_us-gaap_DividendsDeclaredTableTextBlock_03336F4D17D7C6B796B3F29DA40CF1C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsDeclaredTableTextBlock_03336F4D17D7C6B796B3F29DA40CF1C7" xlink:to="lab_us-gaap_DividendsDeclaredTableTextBlock_03336F4D17D7C6B796B3F29DA40CF1C7" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_47F2AB334D79D3D2FEA706BF59CFD682_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract_47F2AB334D79D3D2FEA706BF59CFD682" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_47F2AB334D79D3D2FEA706BF59CFD682" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_47F2AB334D79D3D2FEA706BF59CFD682" xlink:to="lab_us-gaap_StatementOfFinancialPositionAbstract_47F2AB334D79D3D2FEA706BF59CFD682" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockNoParValue_58D96AFD47800C90CC6C06BF59CFF62E_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockNoParValue_58D96AFD47800C90CC6C06BF59CFF62E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, par value</link:label>
    <link:label id="lab_us-gaap_CommonStockNoParValue_58D96AFD47800C90CC6C06BF59CFF62E_label_en-US" xlink:label="lab_us-gaap_CommonStockNoParValue_58D96AFD47800C90CC6C06BF59CFF62E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, No Par Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockNoParValue" xlink:label="loc_us-gaap_CommonStockNoParValue_58D96AFD47800C90CC6C06BF59CFF62E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockNoParValue_58D96AFD47800C90CC6C06BF59CFF62E" xlink:to="lab_us-gaap_CommonStockNoParValue_58D96AFD47800C90CC6C06BF59CFF62E" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockSharesIssued_C33DE5453170399864B00736CBD6E069_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued_C33DE5453170399864B00736CBD6E069" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Stock Shares Issued And Outstanding</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesIssued_C33DE5453170399864B00736CBD6E069_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued_C33DE5453170399864B00736CBD6E069" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_C33DE5453170399864B00736CBD6E069" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesIssued_C33DE5453170399864B00736CBD6E069" xlink:to="lab_us-gaap_CommonStockSharesIssued_C33DE5453170399864B00736CBD6E069" xlink:type="arc" />
    <link:label id="lab_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_30EF775E9F101806C8FC5B4F08F20E96_terseLabel_en-US" xlink:label="lab_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_30EF775E9F101806C8FC5B4F08F20E96" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee Benefit Plans</link:label>
    <link:label id="lab_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_30EF775E9F101806C8FC5B4F08F20E96_label_en-US" xlink:label="lab_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_30EF775E9F101806C8FC5B4F08F20E96" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compensation and Employee Benefit Plans [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CompensationAndEmployeeBenefitPlansTextBlock" xlink:label="loc_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_30EF775E9F101806C8FC5B4F08F20E96" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_30EF775E9F101806C8FC5B4F08F20E96" xlink:to="lab_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_30EF775E9F101806C8FC5B4F08F20E96" xlink:type="arc" />
    <link:label id="lab_colb_IncomeAbstract_D96F76ED259EFFDDC5D47646DCD6F1EC_terseLabel_en-US" xlink:label="lab_colb_IncomeAbstract_D96F76ED259EFFDDC5D47646DCD6F1EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income</link:label>
    <link:label id="lab_colb_IncomeAbstract_D96F76ED259EFFDDC5D47646DCD6F1EC_label_en-US" xlink:label="lab_colb_IncomeAbstract_D96F76ED259EFFDDC5D47646DCD6F1EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income [Abstract]</link:label>
    <link:label id="lab_colb_IncomeAbstract_D96F76ED259EFFDDC5D47646DCD6F1EC_documentation_en-US" xlink:label="lab_colb_IncomeAbstract_D96F76ED259EFFDDC5D47646DCD6F1EC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_IncomeAbstract" xlink:label="loc_colb_IncomeAbstract_D96F76ED259EFFDDC5D47646DCD6F1EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_IncomeAbstract_D96F76ED259EFFDDC5D47646DCD6F1EC" xlink:to="lab_colb_IncomeAbstract_D96F76ED259EFFDDC5D47646DCD6F1EC" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentIncomeDividend_6CEBF75E3AC9FE64D3C77646DCF5DD4D_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentIncomeDividend_6CEBF75E3AC9FE64D3C77646DCF5DD4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividend from banking subsidiaries</link:label>
    <link:label id="lab_us-gaap_InvestmentIncomeDividend_6CEBF75E3AC9FE64D3C77646DCF5DD4D_label_en-US" xlink:label="lab_us-gaap_InvestmentIncomeDividend_6CEBF75E3AC9FE64D3C77646DCF5DD4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Income, Dividend</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentIncomeDividend" xlink:label="loc_us-gaap_InvestmentIncomeDividend_6CEBF75E3AC9FE64D3C77646DCF5DD4D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentIncomeDividend_6CEBF75E3AC9FE64D3C77646DCF5DD4D" xlink:to="lab_us-gaap_InvestmentIncomeDividend_6CEBF75E3AC9FE64D3C77646DCF5DD4D" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_1D8AAA6B48E03438DF2D7646DCF51B72_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_1D8AAA6B48E03438DF2D7646DCF51B72" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deposits in banks</link:label>
    <link:label id="lab_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_1D8AAA6B48E03438DF2D7646DCF51B72_label_en-US" xlink:label="lab_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_1D8AAA6B48E03438DF2D7646DCF51B72" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income, Deposits with Financial Institutions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeDepositsWithFinancialInstitutions" xlink:label="loc_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_1D8AAA6B48E03438DF2D7646DCF51B72" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_1D8AAA6B48E03438DF2D7646DCF51B72" xlink:to="lab_us-gaap_InterestIncomeDepositsWithFinancialInstitutions_1D8AAA6B48E03438DF2D7646DCF51B72" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestIncomeOtherOperatingIncome_E66C62B58C4F993C993C7646DCF500E7_terseLabel_en-US" xlink:label="lab_us-gaap_NoninterestIncomeOtherOperatingIncome_E66C62B58C4F993C993C7646DCF500E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other income</link:label>
    <link:label id="lab_us-gaap_NoninterestIncomeOtherOperatingIncome_E66C62B58C4F993C993C7646DCF500E7_label_en-US" xlink:label="lab_us-gaap_NoninterestIncomeOtherOperatingIncome_E66C62B58C4F993C993C7646DCF500E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noninterest Income, Other Operating Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestIncomeOtherOperatingIncome" xlink:label="loc_us-gaap_NoninterestIncomeOtherOperatingIncome_E66C62B58C4F993C993C7646DCF500E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestIncomeOtherOperatingIncome_E66C62B58C4F993C993C7646DCF500E7" xlink:to="lab_us-gaap_NoninterestIncomeOtherOperatingIncome_E66C62B58C4F993C993C7646DCF500E7" xlink:type="arc" />
    <link:label id="lab_us-gaap_Revenues_9150681EFF9AEF9D0C627646DCF50BFA_terseLabel_en-US" xlink:label="lab_us-gaap_Revenues_9150681EFF9AEF9D0C627646DCF50BFA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Income</link:label>
    <link:label id="lab_us-gaap_Revenues_9150681EFF9AEF9D0C627646DCF50BFA_label_en-US" xlink:label="lab_us-gaap_Revenues_9150681EFF9AEF9D0C627646DCF50BFA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_9150681EFF9AEF9D0C627646DCF50BFA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Revenues_9150681EFF9AEF9D0C627646DCF50BFA" xlink:to="lab_us-gaap_Revenues_9150681EFF9AEF9D0C627646DCF50BFA" xlink:type="arc" />
    <link:label id="lab_colb_ExpenseAbstract_9A7326182A77D12CE5CB7646DCF564CC_terseLabel_en-US" xlink:label="lab_colb_ExpenseAbstract_9A7326182A77D12CE5CB7646DCF564CC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expense</link:label>
    <link:label id="lab_colb_ExpenseAbstract_9A7326182A77D12CE5CB7646DCF564CC_label_en-US" xlink:label="lab_colb_ExpenseAbstract_9A7326182A77D12CE5CB7646DCF564CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Expense [Abstract]</link:label>
    <link:label id="lab_colb_ExpenseAbstract_9A7326182A77D12CE5CB7646DCF564CC_documentation_en-US" xlink:label="lab_colb_ExpenseAbstract_9A7326182A77D12CE5CB7646DCF564CC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Expense [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ExpenseAbstract" xlink:label="loc_colb_ExpenseAbstract_9A7326182A77D12CE5CB7646DCF564CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ExpenseAbstract_9A7326182A77D12CE5CB7646DCF564CC" xlink:to="lab_colb_ExpenseAbstract_9A7326182A77D12CE5CB7646DCF564CC" xlink:type="arc" />
    <link:label id="lab_us-gaap_LaborAndRelatedExpense_3427BCECC5D7E6D50A067646DCF5E516_terseLabel_en-US" xlink:label="lab_us-gaap_LaborAndRelatedExpense_3427BCECC5D7E6D50A067646DCF5E516" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation and employee benefits</link:label>
    <link:label id="lab_us-gaap_LaborAndRelatedExpense_3427BCECC5D7E6D50A067646DCF5E516_label_en-US" xlink:label="lab_us-gaap_LaborAndRelatedExpense_3427BCECC5D7E6D50A067646DCF5E516" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Labor and Related Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LaborAndRelatedExpense" xlink:label="loc_us-gaap_LaborAndRelatedExpense_3427BCECC5D7E6D50A067646DCF5E516" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LaborAndRelatedExpense_3427BCECC5D7E6D50A067646DCF5E516" xlink:to="lab_us-gaap_LaborAndRelatedExpense_3427BCECC5D7E6D50A067646DCF5E516" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_CC23F524FB79148E2C897646DCF52F9C_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_CC23F524FB79148E2C897646DCF52F9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Expense, Subordinated Notes and Debentures</link:label>
    <link:label id="lab_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_CC23F524FB79148E2C897646DCF52F9C_label_en-US" xlink:label="lab_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_CC23F524FB79148E2C897646DCF52F9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, Subordinated Notes and Debentures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseSubordinatedNotesAndDebentures" xlink:label="loc_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_CC23F524FB79148E2C897646DCF52F9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_CC23F524FB79148E2C897646DCF52F9C" xlink:to="lab_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_CC23F524FB79148E2C897646DCF52F9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseOtherShortTermBorrowings_F1B3852FB29CBF06B5187646DCF5A417_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseOtherShortTermBorrowings_F1B3852FB29CBF06B5187646DCF5A417" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other borrowings</link:label>
    <link:label id="lab_us-gaap_InterestExpenseOtherShortTermBorrowings_F1B3852FB29CBF06B5187646DCF5A417_label_en-US" xlink:label="lab_us-gaap_InterestExpenseOtherShortTermBorrowings_F1B3852FB29CBF06B5187646DCF5A417" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, Other Short-term Borrowings</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseOtherShortTermBorrowings" xlink:label="loc_us-gaap_InterestExpenseOtherShortTermBorrowings_F1B3852FB29CBF06B5187646DCF5A417" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseOtherShortTermBorrowings_F1B3852FB29CBF06B5187646DCF5A417" xlink:to="lab_us-gaap_InterestExpenseOtherShortTermBorrowings_F1B3852FB29CBF06B5187646DCF5A417" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherNoninterestExpense_05EFB8D0188B7F02AE2F7646DCF50EAB_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherNoninterestExpense_05EFB8D0188B7F02AE2F7646DCF50EAB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other expense</link:label>
    <link:label id="lab_us-gaap_OtherNoninterestExpense_05EFB8D0188B7F02AE2F7646DCF50EAB_label_en-US" xlink:label="lab_us-gaap_OtherNoninterestExpense_05EFB8D0188B7F02AE2F7646DCF50EAB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Noninterest Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNoninterestExpense" xlink:label="loc_us-gaap_OtherNoninterestExpense_05EFB8D0188B7F02AE2F7646DCF50EAB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNoninterestExpense_05EFB8D0188B7F02AE2F7646DCF50EAB" xlink:to="lab_us-gaap_OtherNoninterestExpense_05EFB8D0188B7F02AE2F7646DCF50EAB" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingCostsAndExpenses_41D7E8C9DB3A1F39822F7646DCF58F1A_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingCostsAndExpenses_41D7E8C9DB3A1F39822F7646DCF58F1A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Expenses</link:label>
    <link:label id="lab_us-gaap_OperatingCostsAndExpenses_41D7E8C9DB3A1F39822F7646DCF58F1A_label_en-US" xlink:label="lab_us-gaap_OperatingCostsAndExpenses_41D7E8C9DB3A1F39822F7646DCF58F1A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Costs and Expenses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingCostsAndExpenses" xlink:label="loc_us-gaap_OperatingCostsAndExpenses_41D7E8C9DB3A1F39822F7646DCF58F1A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingCostsAndExpenses_41D7E8C9DB3A1F39822F7646DCF58F1A" xlink:to="lab_us-gaap_OperatingCostsAndExpenses_41D7E8C9DB3A1F39822F7646DCF58F1A" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6A2FDE0F7F500A7FAD9E7646DCF5D7FA_verboseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6A2FDE0F7F500A7FAD9E7646DCF5D7FA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Income before income tax benefit and equity in undistributed (excess distributed) earnings of subsidiaries</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6A2FDE0F7F500A7FAD9E7646DCF5D7FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6A2FDE0F7F500A7FAD9E7646DCF5D7FA" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_6A2FDE0F7F500A7FAD9E7646DCF5D7FA" xlink:type="arc" />
    <link:label id="lab_colb_IncomeLossBeforeEquityInUndistributedNetIncomeLossOfSubsidiaries_5253DD3DEC08BCF4C6627646DCF5846C_terseLabel_en-US" xlink:label="lab_colb_IncomeLossBeforeEquityInUndistributedNetIncomeLossOfSubsidiaries_5253DD3DEC08BCF4C6627646DCF5846C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income before equity in undistributed earnings of subsidiaries</link:label>
    <link:label id="lab_colb_IncomeLossBeforeEquityInUndistributedNetIncomeLossOfSubsidiaries_5253DD3DEC08BCF4C6627646DCF5846C_label_en-US" xlink:label="lab_colb_IncomeLossBeforeEquityInUndistributedNetIncomeLossOfSubsidiaries_5253DD3DEC08BCF4C6627646DCF5846C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) before equity in undistributed net income (loss) of subsidiaries</link:label>
    <link:label id="lab_colb_IncomeLossBeforeEquityInUndistributedNetIncomeLossOfSubsidiaries_5253DD3DEC08BCF4C6627646DCF5846C_documentation_en-US" xlink:label="lab_colb_IncomeLossBeforeEquityInUndistributedNetIncomeLossOfSubsidiaries_5253DD3DEC08BCF4C6627646DCF5846C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income (Loss) before equity in undistributed net income (loss) of subsidiaries</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_IncomeLossBeforeEquityInUndistributedNetIncomeLossOfSubsidiaries" xlink:label="loc_colb_IncomeLossBeforeEquityInUndistributedNetIncomeLossOfSubsidiaries_5253DD3DEC08BCF4C6627646DCF5846C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_IncomeLossBeforeEquityInUndistributedNetIncomeLossOfSubsidiaries_5253DD3DEC08BCF4C6627646DCF5846C" xlink:to="lab_colb_IncomeLossBeforeEquityInUndistributedNetIncomeLossOfSubsidiaries_5253DD3DEC08BCF4C6627646DCF5846C" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_806827A3281FECA228457646DCF5A94E_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_806827A3281FECA228457646DCF5A94E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity in undistributed earnings of subsidiaries</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_806827A3281FECA228457646DCF5A94E_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_806827A3281FECA228457646DCF5A94E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Equity Method Investments, Net of Dividends or Distributions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_806827A3281FECA228457646DCF5A94E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_806827A3281FECA228457646DCF5A94E" xlink:to="lab_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_806827A3281FECA228457646DCF5A94E" xlink:type="arc" />
    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_0C0FBB7259759F9967195B4F09FC97D0_label_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_0C0FBB7259759F9967195B4F09FC97D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_0C0FBB7259759F9967195B4F09FC97D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_0C0FBB7259759F9967195B4F09FC97D0" xlink:to="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_0C0FBB7259759F9967195B4F09FC97D0" xlink:type="arc" />
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsTable_D571022279BDF3A997855B4F09FC7823_terseLabel_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsTable_D571022279BDF3A997855B4F09FC7823" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets [Table]</link:label>
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsTable_D571022279BDF3A997855B4F09FC7823_label_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsTable_D571022279BDF3A997855B4F09FC7823" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets [Table]</link:label>
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsTable_D571022279BDF3A997855B4F09FC7823_documentation_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsTable_D571022279BDF3A997855B4F09FC7823" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_GoodwillAndIntangibleAssetsTable" xlink:label="loc_colb_GoodwillAndIntangibleAssetsTable_D571022279BDF3A997855B4F09FC7823" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_GoodwillAndIntangibleAssetsTable_D571022279BDF3A997855B4F09FC7823" xlink:to="lab_colb_GoodwillAndIntangibleAssetsTable_D571022279BDF3A997855B4F09FC7823" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2CDD33ABB0E6FD6B865B4F09FC2C45_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2CDD33ABB0E6FD6B865B4F09FC2C45" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets by Major Class [Axis]</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2CDD33ABB0E6FD6B865B4F09FC2C45_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2CDD33ABB0E6FD6B865B4F09FC2C45" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets by Major Class [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2CDD33ABB0E6FD6B865B4F09FC2C45" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2CDD33ABB0E6FD6B865B4F09FC2C45" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2CDD33ABB0E6FD6B865B4F09FC2C45" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B915270AA031BD09C4145B4F09FCFA0B_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B915270AA031BD09C4145B4F09FCFA0B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B915270AA031BD09C4145B4F09FCFA0B_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B915270AA031BD09C4145B4F09FCFA0B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B915270AA031BD09C4145B4F09FCFA0B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B915270AA031BD09C4145B4F09FCFA0B" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B915270AA031BD09C4145B4F09FCFA0B" xlink:type="arc" />
    <link:label id="lab_us-gaap_CoreDepositsMember_593C05338927D78A6AE05B4F09FC668C_terseLabel_en-US" xlink:label="lab_us-gaap_CoreDepositsMember_593C05338927D78A6AE05B4F09FC668C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Core Deposits [Member]</link:label>
    <link:label id="lab_us-gaap_CoreDepositsMember_593C05338927D78A6AE05B4F09FC668C_label_en-US" xlink:label="lab_us-gaap_CoreDepositsMember_593C05338927D78A6AE05B4F09FC668C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Core Deposits [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CoreDepositsMember" xlink:label="loc_us-gaap_CoreDepositsMember_593C05338927D78A6AE05B4F09FC668C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CoreDepositsMember_593C05338927D78A6AE05B4F09FC668C" xlink:to="lab_us-gaap_CoreDepositsMember_593C05338927D78A6AE05B4F09FC668C" xlink:type="arc" />
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsLineItems_DA4CA00AD9EA66DF54AE5B4F09FCA0E6_terseLabel_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsLineItems_DA4CA00AD9EA66DF54AE5B4F09FCA0E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets [Line Items]</link:label>
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsLineItems_DA4CA00AD9EA66DF54AE5B4F09FCA0E6_label_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsLineItems_DA4CA00AD9EA66DF54AE5B4F09FCA0E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets [Line Items]</link:label>
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsLineItems_DA4CA00AD9EA66DF54AE5B4F09FCA0E6_documentation_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsLineItems_DA4CA00AD9EA66DF54AE5B4F09FCA0E6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets [Line Items]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_GoodwillAndIntangibleAssetsLineItems" xlink:label="loc_colb_GoodwillAndIntangibleAssetsLineItems_DA4CA00AD9EA66DF54AE5B4F09FCA0E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_GoodwillAndIntangibleAssetsLineItems_DA4CA00AD9EA66DF54AE5B4F09FCA0E6" xlink:to="lab_colb_GoodwillAndIntangibleAssetsLineItems_DA4CA00AD9EA66DF54AE5B4F09FCA0E6" xlink:type="arc" />
    <link:label id="lab_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_AEE75EB116C46A74B45D5B4F09FC8B4E_terseLabel_en-US" xlink:label="lab_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_AEE75EB116C46A74B45D5B4F09FC8B4E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Indefinite-lived Intangible Assets (Excluding Goodwill)</link:label>
    <link:label id="lab_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_AEE75EB116C46A74B45D5B4F09FC8B4E_label_en-US" xlink:label="lab_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_AEE75EB116C46A74B45D5B4F09FC8B4E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Indefinite-lived Intangible Assets (Excluding Goodwill)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_AEE75EB116C46A74B45D5B4F09FC8B4E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_AEE75EB116C46A74B45D5B4F09FC8B4E" xlink:to="lab_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_AEE75EB116C46A74B45D5B4F09FC8B4E" xlink:type="arc" />
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_C1A7BA4DB0197A3C61A85B4F09FC5140_terseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_C1A7BA4DB0197A3C61A85B4F09FC5140" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intangible Assets, Net (Excluding Goodwill)</link:label>
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_C1A7BA4DB0197A3C61A85B4F09FC5140_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_C1A7BA4DB0197A3C61A85B4F09FC5140" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intangible Assets, Net (Excluding Goodwill)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_C1A7BA4DB0197A3C61A85B4F09FC5140" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_C1A7BA4DB0197A3C61A85B4F09FC5140" xlink:to="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_C1A7BA4DB0197A3C61A85B4F09FC5140" xlink:type="arc" />
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsRollForward_9A5197A834246F868E065B4F09FCE0A4_label_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsRollForward_9A5197A834246F868E065B4F09FCE0A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets [Roll Forward]</link:label>
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsRollForward_9A5197A834246F868E065B4F09FCE0A4_documentation_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsRollForward_9A5197A834246F868E065B4F09FCE0A4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets [Roll Forward]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_GoodwillAndIntangibleAssetsRollForward" xlink:label="loc_colb_GoodwillAndIntangibleAssetsRollForward_9A5197A834246F868E065B4F09FCE0A4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_GoodwillAndIntangibleAssetsRollForward_9A5197A834246F868E065B4F09FCE0A4" xlink:to="lab_colb_GoodwillAndIntangibleAssetsRollForward_9A5197A834246F868E065B4F09FCE0A4" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_789EB204DFDD78C916CE5B4F09FC37AC_periodStartLabel_en-US" xlink:label="lab_us-gaap_Goodwill_789EB204DFDD78C916CE5B4F09FC37AC" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Total goodwill, beginning of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_789EB204DFDD78C916CE5B4F09FC37AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_789EB204DFDD78C916CE5B4F09FC37AC" xlink:to="lab_us-gaap_Goodwill_789EB204DFDD78C916CE5B4F09FC37AC" xlink:type="arc" />
    <link:label id="lab_us-gaap_GoodwillAcquiredDuringPeriod_9D85940FF3F0FEAEE1605B4F09FC7C8C_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAcquiredDuringPeriod_9D85940FF3F0FEAEE1605B4F09FC7C8C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Established through acquisitions</link:label>
    <link:label id="lab_us-gaap_GoodwillAcquiredDuringPeriod_9D85940FF3F0FEAEE1605B4F09FC7C8C_label_en-US" xlink:label="lab_us-gaap_GoodwillAcquiredDuringPeriod_9D85940FF3F0FEAEE1605B4F09FC7C8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill, Acquired During Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_9D85940FF3F0FEAEE1605B4F09FC7C8C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAcquiredDuringPeriod_9D85940FF3F0FEAEE1605B4F09FC7C8C" xlink:to="lab_us-gaap_GoodwillAcquiredDuringPeriod_9D85940FF3F0FEAEE1605B4F09FC7C8C" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_EFEFB00EB9229A8BC4315B4F09FC3269_periodEndLabel_en-US" xlink:label="lab_us-gaap_Goodwill_EFEFB00EB9229A8BC4315B4F09FC3269" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Total goodwill, end of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_EFEFB00EB9229A8BC4315B4F09FC3269" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_EFEFB00EB9229A8BC4315B4F09FC3269" xlink:to="lab_us-gaap_Goodwill_EFEFB00EB9229A8BC4315B4F09FC3269" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsGross_3005CCC43C671F4513535B4F09FCF67C_periodStartLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsGross_3005CCC43C671F4513535B4F09FCF67C" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Gross core deposit intangible balance, beginning of period</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsGross_3005CCC43C671F4513535B4F09FCF67C_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsGross_3005CCC43C671F4513535B4F09FCF67C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_3005CCC43C671F4513535B4F09FCF67C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsGross_3005CCC43C671F4513535B4F09FCF67C" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsGross_3005CCC43C671F4513535B4F09FCF67C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_50BF78A18A406DD2CF695B4F09FC8E10_negatedPeriodStartLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_50BF78A18A406DD2CF695B4F09FC8E10" xlink:role="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="resource" xml:lang="en-US">Accumulated amortization, beginning of period</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_50BF78A18A406DD2CF695B4F09FC8E10_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_50BF78A18A406DD2CF695B4F09FC8E10" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Accumulated Amortization</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_50BF78A18A406DD2CF695B4F09FC8E10" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_50BF78A18A406DD2CF695B4F09FC8E10" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_50BF78A18A406DD2CF695B4F09FC8E10" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_E142F392405C7DD77CA45B4F09FC2E0C_periodStartLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_E142F392405C7DD77CA45B4F09FC2E0C" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Core deposit intangible, net, beginning of period</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_E142F392405C7DD77CA45B4F09FC2E0C_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_E142F392405C7DD77CA45B4F09FC2E0C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_E142F392405C7DD77CA45B4F09FC2E0C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_E142F392405C7DD77CA45B4F09FC2E0C" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsNet_E142F392405C7DD77CA45B4F09FC2E0C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_87B787FF61A980732CDC5B4F09FC250C_terseLabel_en-US" xlink:label="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_87B787FF61A980732CDC5B4F09FC250C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Established through acquisitions</link:label>
    <link:label id="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_87B787FF61A980732CDC5B4F09FC250C_label_en-US" xlink:label="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_87B787FF61A980732CDC5B4F09FC250C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-lived Intangible Assets Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_87B787FF61A980732CDC5B4F09FC250C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_87B787FF61A980732CDC5B4F09FC250C" xlink:to="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_87B787FF61A980732CDC5B4F09FC250C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_556CBAB4788425E2261D5B4F09FC7FD8_negatedLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_556CBAB4788425E2261D5B4F09FC7FD8" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">CDI current period amortization</link:label>
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_556CBAB4788425E2261D5B4F09FC7FD8_label_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_556CBAB4788425E2261D5B4F09FC7FD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Intangible Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_556CBAB4788425E2261D5B4F09FC7FD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfIntangibleAssets_556CBAB4788425E2261D5B4F09FC7FD8" xlink:to="lab_us-gaap_AmortizationOfIntangibleAssets_556CBAB4788425E2261D5B4F09FC7FD8" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_4B8E0F54E1EB018813485B4F09FC6D4F_periodEndLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_4B8E0F54E1EB018813485B4F09FC6D4F" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Total core deposit intangible, end of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4B8E0F54E1EB018813485B4F09FC6D4F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4B8E0F54E1EB018813485B4F09FC6D4F" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsNet_4B8E0F54E1EB018813485B4F09FC6D4F" xlink:type="arc" />
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsTotal_2AF9DFA51AC8C0F84A7C5B4F09FCBCA2_terseLabel_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsTotal_2AF9DFA51AC8C0F84A7C5B4F09FCBCA2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total goodwill and intangible assets, end of period</link:label>
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsTotal_2AF9DFA51AC8C0F84A7C5B4F09FCBCA2_label_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsTotal_2AF9DFA51AC8C0F84A7C5B4F09FCBCA2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill and intangible assets total</link:label>
    <link:label id="lab_colb_GoodwillAndIntangibleAssetsTotal_2AF9DFA51AC8C0F84A7C5B4F09FCBCA2_documentation_en-US" xlink:label="lab_colb_GoodwillAndIntangibleAssetsTotal_2AF9DFA51AC8C0F84A7C5B4F09FCBCA2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Goodwill and intangible assets total</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_GoodwillAndIntangibleAssetsTotal" xlink:label="loc_colb_GoodwillAndIntangibleAssetsTotal_2AF9DFA51AC8C0F84A7C5B4F09FCBCA2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_GoodwillAndIntangibleAssetsTotal_2AF9DFA51AC8C0F84A7C5B4F09FCBCA2" xlink:to="lab_colb_GoodwillAndIntangibleAssetsTotal_2AF9DFA51AC8C0F84A7C5B4F09FCBCA2" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_594FB31D9F0799A2295E5B4F09FCDC94_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_594FB31D9F0799A2295E5B4F09FCDC94" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated life of CDI, in years</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_594FB31D9F0799A2295E5B4F09FCDC94_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_594FB31D9F0799A2295E5B4F09FCDC94" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Asset, Useful Life</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_594FB31D9F0799A2295E5B4F09FCDC94" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_594FB31D9F0799A2295E5B4F09FCDC94" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_594FB31D9F0799A2295E5B4F09FCDC94" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityNoteAbstract_03487094B5347684101A5B4F0847EFA6_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteAbstract_03487094B5347684101A5B4F0847EFA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Note [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityNoteAbstract" xlink:label="loc_us-gaap_StockholdersEquityNoteAbstract_03487094B5347684101A5B4F0847EFA6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityNoteAbstract_03487094B5347684101A5B4F0847EFA6" xlink:to="lab_us-gaap_StockholdersEquityNoteAbstract_03487094B5347684101A5B4F0847EFA6" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_376EA682B65317237EB15B4F0847867D_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_376EA682B65317237EB15B4F0847867D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shareholders' Equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_376EA682B65317237EB15B4F0847867D_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_376EA682B65317237EB15B4F0847867D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Note Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:label="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock_376EA682B65317237EB15B4F0847867D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock_376EA682B65317237EB15B4F0847867D" xlink:to="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_376EA682B65317237EB15B4F0847867D" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationsAbstract_D7756FC73689EA0DD8D7EE81F4FC6EE1_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationsAbstract_D7756FC73689EA0DD8D7EE81F4FC6EE1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combinations [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_D7756FC73689EA0DD8D7EE81F4FC6EE1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_D7756FC73689EA0DD8D7EE81F4FC6EE1" xlink:to="lab_us-gaap_BusinessCombinationsAbstract_D7756FC73689EA0DD8D7EE81F4FC6EE1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_5474F1179022E59A6FD1EE81F4FDE7B8_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_5474F1179022E59A6FD1EE81F4FDE7B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Business Acquisitions, by Acquisition [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_5474F1179022E59A6FD1EE81F4FDE7B8_label_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_5474F1179022E59A6FD1EE81F4FDE7B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Business Acquisitions, by Acquisition [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_5474F1179022E59A6FD1EE81F4FDE7B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_5474F1179022E59A6FD1EE81F4FDE7B8" xlink:to="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_5474F1179022E59A6FD1EE81F4FDE7B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_93719900F71488029A05EE81F4FDCDD3_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_93719900F71488029A05EE81F4FDCDD3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Statement Location [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_93719900F71488029A05EE81F4FDCDD3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_93719900F71488029A05EE81F4FDCDD3" xlink:to="lab_us-gaap_IncomeStatementLocationAxis_93719900F71488029A05EE81F4FDCDD3" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementLocationDomain_F6D6D72F79AEECB5BED0EE81F4FD8541_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_F6D6D72F79AEECB5BED0EE81F4FD8541" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Statement Location [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_F6D6D72F79AEECB5BED0EE81F4FD8541" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_F6D6D72F79AEECB5BED0EE81F4FD8541" xlink:to="lab_us-gaap_IncomeStatementLocationDomain_F6D6D72F79AEECB5BED0EE81F4FD8541" xlink:type="arc" />
    <link:label id="lab_colb_CompensationandemployeebenefitsMember_507275BA578D8DF6800DEE81F4FE5789_terseLabel_en-US" xlink:label="lab_colb_CompensationandemployeebenefitsMember_507275BA578D8DF6800DEE81F4FE5789" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation and employee benefits [Member]</link:label>
    <link:label id="lab_colb_CompensationandemployeebenefitsMember_507275BA578D8DF6800DEE81F4FE5789_label_en-US" xlink:label="lab_colb_CompensationandemployeebenefitsMember_507275BA578D8DF6800DEE81F4FE5789" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Compensation and employee benefits [Member]</link:label>
    <link:label id="lab_colb_CompensationandemployeebenefitsMember_507275BA578D8DF6800DEE81F4FE5789_documentation_en-US" xlink:label="lab_colb_CompensationandemployeebenefitsMember_507275BA578D8DF6800DEE81F4FE5789" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Compensation and employee benefits [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CompensationandemployeebenefitsMember" xlink:label="loc_colb_CompensationandemployeebenefitsMember_507275BA578D8DF6800DEE81F4FE5789" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CompensationandemployeebenefitsMember_507275BA578D8DF6800DEE81F4FE5789" xlink:to="lab_colb_CompensationandemployeebenefitsMember_507275BA578D8DF6800DEE81F4FE5789" xlink:type="arc" />
    <link:label id="lab_us-gaap_OccupancyMember_DB7F1583005B99BC921AEE81F4FE0F1D_terseLabel_en-US" xlink:label="lab_us-gaap_OccupancyMember_DB7F1583005B99BC921AEE81F4FE0F1D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Occupancy [Member]</link:label>
    <link:label id="lab_us-gaap_OccupancyMember_DB7F1583005B99BC921AEE81F4FE0F1D_label_en-US" xlink:label="lab_us-gaap_OccupancyMember_DB7F1583005B99BC921AEE81F4FE0F1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Occupancy [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OccupancyMember" xlink:label="loc_us-gaap_OccupancyMember_DB7F1583005B99BC921AEE81F4FE0F1D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OccupancyMember_DB7F1583005B99BC921AEE81F4FE0F1D" xlink:to="lab_us-gaap_OccupancyMember_DB7F1583005B99BC921AEE81F4FE0F1D" xlink:type="arc" />
    <link:label id="lab_colb_AdvertisingandpromotionMember_9CB7C856C0866DC94A1AEE81F4FE1D15_terseLabel_en-US" xlink:label="lab_colb_AdvertisingandpromotionMember_9CB7C856C0866DC94A1AEE81F4FE1D15" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advertising and promotion [Member]</link:label>
    <link:label id="lab_colb_AdvertisingandpromotionMember_9CB7C856C0866DC94A1AEE81F4FE1D15_label_en-US" xlink:label="lab_colb_AdvertisingandpromotionMember_9CB7C856C0866DC94A1AEE81F4FE1D15" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advertising and promotion [Member]</link:label>
    <link:label id="lab_colb_AdvertisingandpromotionMember_9CB7C856C0866DC94A1AEE81F4FE1D15_documentation_en-US" xlink:label="lab_colb_AdvertisingandpromotionMember_9CB7C856C0866DC94A1AEE81F4FE1D15" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Advertising and promotion [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AdvertisingandpromotionMember" xlink:label="loc_colb_AdvertisingandpromotionMember_9CB7C856C0866DC94A1AEE81F4FE1D15" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AdvertisingandpromotionMember_9CB7C856C0866DC94A1AEE81F4FE1D15" xlink:to="lab_colb_AdvertisingandpromotionMember_9CB7C856C0866DC94A1AEE81F4FE1D15" xlink:type="arc" />
    <link:label id="lab_colb_DataprocessingMember_D3CDC9AA3EC909E3841CEE81F4FE6728_terseLabel_en-US" xlink:label="lab_colb_DataprocessingMember_D3CDC9AA3EC909E3841CEE81F4FE6728" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Data processing and communications [Member]</link:label>
    <link:label id="lab_colb_DataprocessingMember_D3CDC9AA3EC909E3841CEE81F4FE6728_label_en-US" xlink:label="lab_colb_DataprocessingMember_D3CDC9AA3EC909E3841CEE81F4FE6728" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Data processing [Member]</link:label>
    <link:label id="lab_colb_DataprocessingMember_D3CDC9AA3EC909E3841CEE81F4FE6728_documentation_en-US" xlink:label="lab_colb_DataprocessingMember_D3CDC9AA3EC909E3841CEE81F4FE6728" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Data processing [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DataprocessingMember" xlink:label="loc_colb_DataprocessingMember_D3CDC9AA3EC909E3841CEE81F4FE6728" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DataprocessingMember_D3CDC9AA3EC909E3841CEE81F4FE6728" xlink:to="lab_colb_DataprocessingMember_D3CDC9AA3EC909E3841CEE81F4FE6728" xlink:type="arc" />
    <link:label id="lab_colb_LegalandprofessionalfeesMember_BB524DE3B4A222C05ECFEE81F4FEDAE4_terseLabel_en-US" xlink:label="lab_colb_LegalandprofessionalfeesMember_BB524DE3B4A222C05ECFEE81F4FEDAE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal and professional fees [Member]</link:label>
    <link:label id="lab_colb_LegalandprofessionalfeesMember_BB524DE3B4A222C05ECFEE81F4FEDAE4_label_en-US" xlink:label="lab_colb_LegalandprofessionalfeesMember_BB524DE3B4A222C05ECFEE81F4FEDAE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legal and professional fees [Member]</link:label>
    <link:label id="lab_colb_LegalandprofessionalfeesMember_BB524DE3B4A222C05ECFEE81F4FEDAE4_documentation_en-US" xlink:label="lab_colb_LegalandprofessionalfeesMember_BB524DE3B4A222C05ECFEE81F4FEDAE4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Legal and professional fees [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LegalandprofessionalfeesMember" xlink:label="loc_colb_LegalandprofessionalfeesMember_BB524DE3B4A222C05ECFEE81F4FEDAE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LegalandprofessionalfeesMember_BB524DE3B4A222C05ECFEE81F4FEDAE4" xlink:to="lab_colb_LegalandprofessionalfeesMember_BB524DE3B4A222C05ECFEE81F4FEDAE4" xlink:type="arc" />
    <link:label id="lab_colb_TaxeslicensesandfeesMember_B4FDC78A2E05819D5560EE81F4FFAAA7_terseLabel_en-US" xlink:label="lab_colb_TaxeslicensesandfeesMember_B4FDC78A2E05819D5560EE81F4FFAAA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Taxes, licenses and fees [Member]</link:label>
    <link:label id="lab_colb_TaxeslicensesandfeesMember_B4FDC78A2E05819D5560EE81F4FFAAA7_label_en-US" xlink:label="lab_colb_TaxeslicensesandfeesMember_B4FDC78A2E05819D5560EE81F4FFAAA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Taxes, licenses and fees [Member]</link:label>
    <link:label id="lab_colb_TaxeslicensesandfeesMember_B4FDC78A2E05819D5560EE81F4FFAAA7_documentation_en-US" xlink:label="lab_colb_TaxeslicensesandfeesMember_B4FDC78A2E05819D5560EE81F4FFAAA7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Taxes, licenses and fees [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_TaxeslicensesandfeesMember" xlink:label="loc_colb_TaxeslicensesandfeesMember_B4FDC78A2E05819D5560EE81F4FFAAA7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_TaxeslicensesandfeesMember_B4FDC78A2E05819D5560EE81F4FFAAA7" xlink:to="lab_colb_TaxeslicensesandfeesMember_B4FDC78A2E05819D5560EE81F4FFAAA7" xlink:type="arc" />
    <link:label id="lab_colb_OthernoninterestexpensesMember_0154562DF963C1F994B4EE81F4FFAB8E_terseLabel_en-US" xlink:label="lab_colb_OthernoninterestexpensesMember_0154562DF963C1F994B4EE81F4FFAB8E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other noninterest expenses [Member]</link:label>
    <link:label id="lab_colb_OthernoninterestexpensesMember_0154562DF963C1F994B4EE81F4FFAB8E_label_en-US" xlink:label="lab_colb_OthernoninterestexpensesMember_0154562DF963C1F994B4EE81F4FFAB8E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other noninterest expenses [Member]</link:label>
    <link:label id="lab_colb_OthernoninterestexpensesMember_0154562DF963C1F994B4EE81F4FFAB8E_documentation_en-US" xlink:label="lab_colb_OthernoninterestexpensesMember_0154562DF963C1F994B4EE81F4FFAB8E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other noninterest expenses [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OthernoninterestexpensesMember" xlink:label="loc_colb_OthernoninterestexpensesMember_0154562DF963C1F994B4EE81F4FFAB8E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OthernoninterestexpensesMember_0154562DF963C1F994B4EE81F4FFAB8E" xlink:to="lab_colb_OthernoninterestexpensesMember_0154562DF963C1F994B4EE81F4FFAB8E" xlink:type="arc" />
    <link:label id="lab_colb_IntermountainCommunityBancorpMember_29A6074578BDDD1B70C6EE820E5CBC01_terseLabel_en-US" xlink:label="lab_colb_IntermountainCommunityBancorpMember_29A6074578BDDD1B70C6EE820E5CBC01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intermountain Community Bancorp [Member]</link:label>
    <link:label id="lab_colb_IntermountainCommunityBancorpMember_29A6074578BDDD1B70C6EE820E5CBC01_label_en-US" xlink:label="lab_colb_IntermountainCommunityBancorpMember_29A6074578BDDD1B70C6EE820E5CBC01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intermountain Community Bancorp [Member]</link:label>
    <link:label id="lab_colb_IntermountainCommunityBancorpMember_29A6074578BDDD1B70C6EE820E5CBC01_documentation_en-US" xlink:label="lab_colb_IntermountainCommunityBancorpMember_29A6074578BDDD1B70C6EE820E5CBC01" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Intermountain Community Bancorp [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_IntermountainCommunityBancorpMember" xlink:label="loc_colb_IntermountainCommunityBancorpMember_29A6074578BDDD1B70C6EE820E5CBC01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_IntermountainCommunityBancorpMember_29A6074578BDDD1B70C6EE820E5CBC01" xlink:to="lab_colb_IntermountainCommunityBancorpMember_29A6074578BDDD1B70C6EE820E5CBC01" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionLineItems_F793C971F8F9D8BD75C6EE81F505D257_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems_F793C971F8F9D8BD75C6EE81F505D257" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition [Line Items]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionLineItems_F793C971F8F9D8BD75C6EE81F505D257_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems_F793C971F8F9D8BD75C6EE81F505D257" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_F793C971F8F9D8BD75C6EE81F505D257" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_F793C971F8F9D8BD75C6EE81F505D257" xlink:to="lab_us-gaap_BusinessAcquisitionLineItems_F793C971F8F9D8BD75C6EE81F505D257" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationConsiderationTransferred1_4DD14196F315FFD79DB8EE81F50597E8_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferred1_4DD14196F315FFD79DB8EE81F50597E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Cost of Acquired Entity, Purchase Price, Total</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationConsiderationTransferred1_4DD14196F315FFD79DB8EE81F50597E8_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationConsiderationTransferred1_4DD14196F315FFD79DB8EE81F50597E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Consideration Transferred</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_4DD14196F315FFD79DB8EE81F50597E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_4DD14196F315FFD79DB8EE81F50597E8" xlink:to="lab_us-gaap_BusinessCombinationConsiderationTransferred1_4DD14196F315FFD79DB8EE81F50597E8" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationAcquisitionRelatedCosts_A3809D9DC31093649205EE81F506F835_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationAcquisitionRelatedCosts_A3809D9DC31093649205EE81F506F835" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Acquisition Related Costs</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationAcquisitionRelatedCosts_A3809D9DC31093649205EE81F506F835_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationAcquisitionRelatedCosts_A3809D9DC31093649205EE81F506F835" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Acquisition Related Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_A3809D9DC31093649205EE81F506F835" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_A3809D9DC31093649205EE81F506F835" xlink:to="lab_us-gaap_BusinessCombinationAcquisitionRelatedCosts_A3809D9DC31093649205EE81F506F835" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_8658769757D576EFA6E3EE81F5061D67_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_8658769757D576EFA6E3EE81F5061D67" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Effective Date of Acquisition</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_8658769757D576EFA6E3EE81F5061D67_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_8658769757D576EFA6E3EE81F5061D67" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Effective Date of Acquisition</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1" xlink:label="loc_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_8658769757D576EFA6E3EE81F5061D67" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_8658769757D576EFA6E3EE81F5061D67" xlink:to="lab_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_8658769757D576EFA6E3EE81F5061D67" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_FB44E030E1302543AB4DEE81F50669B8_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_FB44E030E1302543AB4DEE81F50669B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_FB44E030E1302543AB4DEE81F50669B8_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_FB44E030E1302543AB4DEE81F50669B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_FB44E030E1302543AB4DEE81F50669B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_FB44E030E1302543AB4DEE81F50669B8" xlink:to="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_FB44E030E1302543AB4DEE81F50669B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities_8FD0FED524630C6C6152EE81F5066221_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities_8FD0FED524630C6C6152EE81F5066221" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Purchase Price Allocation, Current Assets, Marketable Securities</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities_8FD0FED524630C6C6152EE81F5066221_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities_8FD0FED524630C6C6152EE81F5066221" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities_8FD0FED524630C6C6152EE81F5066221" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities_8FD0FED524630C6C6152EE81F5066221" xlink:to="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsMarketableSecurities_8FD0FED524630C6C6152EE81F5066221" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationFHLBStock_6F77B3AEBF10753DEFB5EE81F507BB7F_terseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationFHLBStock_6F77B3AEBF10753DEFB5EE81F507BB7F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Purchase Price Allocation, FHLB Stock</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationFHLBStock_6F77B3AEBF10753DEFB5EE81F507BB7F_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationFHLBStock_6F77B3AEBF10753DEFB5EE81F507BB7F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, FHLB Stock</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationFHLBStock_6F77B3AEBF10753DEFB5EE81F507BB7F_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationFHLBStock_6F77B3AEBF10753DEFB5EE81F507BB7F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, FHLB Stock</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationFHLBStock" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationFHLBStock_6F77B3AEBF10753DEFB5EE81F507BB7F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationFHLBStock_6F77B3AEBF10753DEFB5EE81F507BB7F" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationFHLBStock_6F77B3AEBF10753DEFB5EE81F507BB7F" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_09DCAF7504DDFC718A1DEE81F507C64D_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_09DCAF7504DDFC718A1DEE81F507C64D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Acquired Receivable, Fair Value</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_09DCAF7504DDFC718A1DEE81F507C64D_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_09DCAF7504DDFC718A1DEE81F507C64D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Acquired Receivable, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationAcquiredReceivablesFairValue" xlink:label="loc_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_09DCAF7504DDFC718A1DEE81F507C64D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_09DCAF7504DDFC718A1DEE81F507C64D" xlink:to="lab_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_09DCAF7504DDFC718A1DEE81F507C64D" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationAccruedInterestReceivable_6BBC44FD4A8AA31F3EF0EE81F5074B42_terseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationAccruedInterestReceivable_6BBC44FD4A8AA31F3EF0EE81F5074B42" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Purchase Price Allocation, Accrued Interest Receivable</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationAccruedInterestReceivable_6BBC44FD4A8AA31F3EF0EE81F5074B42_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationAccruedInterestReceivable_6BBC44FD4A8AA31F3EF0EE81F5074B42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Accrued Interest Receivable</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationAccruedInterestReceivable_6BBC44FD4A8AA31F3EF0EE81F5074B42_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationAccruedInterestReceivable_6BBC44FD4A8AA31F3EF0EE81F5074B42" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Accrued Interest Receivable</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationAccruedInterestReceivable" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationAccruedInterestReceivable_6BBC44FD4A8AA31F3EF0EE81F5074B42" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationAccruedInterestReceivable_6BBC44FD4A8AA31F3EF0EE81F5074B42" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationAccruedInterestReceivable_6BBC44FD4A8AA31F3EF0EE81F5074B42" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_8D84D472BAEB9657735FEE81F507193F_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_8D84D472BAEB9657735FEE81F507193F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_8D84D472BAEB9657735FEE81F507193F_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_8D84D472BAEB9657735FEE81F507193F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_8D84D472BAEB9657735FEE81F507193F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_8D84D472BAEB9657735FEE81F507193F" xlink:to="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_8D84D472BAEB9657735FEE81F507193F" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationOtherRealEstateOwned_B7A30EC1F9662871B03AEE81F5072738_terseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationOtherRealEstateOwned_B7A30EC1F9662871B03AEE81F5072738" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Purchase Price Allocation, Other Real Estate Owned</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationOtherRealEstateOwned_B7A30EC1F9662871B03AEE81F5072738_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationOtherRealEstateOwned_B7A30EC1F9662871B03AEE81F5072738" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Other Real Estate Owned</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationOtherRealEstateOwned_B7A30EC1F9662871B03AEE81F5072738_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationOtherRealEstateOwned_B7A30EC1F9662871B03AEE81F5072738" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Other Real Estate Owned</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationOtherRealEstateOwned" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationOtherRealEstateOwned_B7A30EC1F9662871B03AEE81F5072738" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationOtherRealEstateOwned_B7A30EC1F9662871B03AEE81F5072738" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationOtherRealEstateOwned_B7A30EC1F9662871B03AEE81F5072738" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationAmortizableIntangibleAssets_DE66FB3C033CB10D2E37EE81F507445E_terseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationAmortizableIntangibleAssets_DE66FB3C033CB10D2E37EE81F507445E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Amortizable Intangible Assets</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationAmortizableIntangibleAssets_DE66FB3C033CB10D2E37EE81F507445E_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationAmortizableIntangibleAssets_DE66FB3C033CB10D2E37EE81F507445E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Amortizable Intangible Assets</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationAmortizableIntangibleAssets_DE66FB3C033CB10D2E37EE81F507445E_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationAmortizableIntangibleAssets_DE66FB3C033CB10D2E37EE81F507445E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation Amortizable Intangible Assets</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationAmortizableIntangibleAssets" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationAmortizableIntangibleAssets_DE66FB3C033CB10D2E37EE81F507445E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationAmortizableIntangibleAssets_DE66FB3C033CB10D2E37EE81F507445E" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationAmortizableIntangibleAssets_DE66FB3C033CB10D2E37EE81F507445E" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationOtherAssets_DEC6F85457069FBCE31AEE81F508E522_terseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationOtherAssets_DEC6F85457069FBCE31AEE81F508E522" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Other Assets</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationOtherAssets_DEC6F85457069FBCE31AEE81F508E522_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationOtherAssets_DEC6F85457069FBCE31AEE81F508E522" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Other Assets</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationOtherAssets_DEC6F85457069FBCE31AEE81F508E522_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationOtherAssets_DEC6F85457069FBCE31AEE81F508E522" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of acquisition cost of a business combination allocated to other assets not separately disclosed in the balance sheet.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationOtherAssets" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationOtherAssets_DEC6F85457069FBCE31AEE81F508E522" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationOtherAssets_DEC6F85457069FBCE31AEE81F508E522" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationOtherAssets_DEC6F85457069FBCE31AEE81F508E522" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_19FF8021349E389B40E8EE81F5082A89_negatedTerseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_19FF8021349E389B40E8EE81F5082A89" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Purchase Price Allocation, Liabilities, Deposits</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_19FF8021349E389B40E8EE81F5082A89_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_19FF8021349E389B40E8EE81F5082A89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Liabilities, Deposits</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_19FF8021349E389B40E8EE81F5082A89_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_19FF8021349E389B40E8EE81F5082A89" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Liabilities, Deposits</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_19FF8021349E389B40E8EE81F5082A89" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_19FF8021349E389B40E8EE81F5082A89" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_19FF8021349E389B40E8EE81F5082A89" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_25D187B175936489EE78EE81F50864AC_terseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_25D187B175936489EE78EE81F50864AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Federal Home Loan bank advances</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_25D187B175936489EE78EE81F50864AC_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_25D187B175936489EE78EE81F50864AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Federal Home Loan bank advances</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_25D187B175936489EE78EE81F50864AC_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_25D187B175936489EE78EE81F50864AC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Federal Home Loan bank advances</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_25D187B175936489EE78EE81F50864AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_25D187B175936489EE78EE81F50864AC" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_25D187B175936489EE78EE81F50864AC" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationSubordinatedDebt_FE1111BC14E3F9EA49ABEE81F508335C_negatedTerseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationSubordinatedDebt_FE1111BC14E3F9EA49ABEE81F508335C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Subordinated Debt</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationSubordinatedDebt_FE1111BC14E3F9EA49ABEE81F508335C_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationSubordinatedDebt_FE1111BC14E3F9EA49ABEE81F508335C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Subordinated Debt</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationSubordinatedDebt_FE1111BC14E3F9EA49ABEE81F508335C_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationSubordinatedDebt_FE1111BC14E3F9EA49ABEE81F508335C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Subordinated Debt</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationSubordinatedDebt" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationSubordinatedDebt_FE1111BC14E3F9EA49ABEE81F508335C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationSubordinatedDebt_FE1111BC14E3F9EA49ABEE81F508335C" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationSubordinatedDebt_FE1111BC14E3F9EA49ABEE81F508335C" xlink:type="arc" />
    <link:label id="lab_colb_Businesscombinationpurchasepriceallocationsecuritiessoldunderagreementstorepurchase_F9F23261C0A6296E0BFAEE81F5080087_negatedTerseLabel_en-US" xlink:label="lab_colb_Businesscombinationpurchasepriceallocationsecuritiessoldunderagreementstorepurchase_F9F23261C0A6296E0BFAEE81F5080087" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Business combination, purchase price allocation, securities sold under agreements to repurchase</link:label>
    <link:label id="lab_colb_Businesscombinationpurchasepriceallocationsecuritiessoldunderagreementstorepurchase_F9F23261C0A6296E0BFAEE81F5080087_label_en-US" xlink:label="lab_colb_Businesscombinationpurchasepriceallocationsecuritiessoldunderagreementstorepurchase_F9F23261C0A6296E0BFAEE81F5080087" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business combination, purchase price allocation, securities sold under agreements to repurchase</link:label>
    <link:label id="lab_colb_Businesscombinationpurchasepriceallocationsecuritiessoldunderagreementstorepurchase_F9F23261C0A6296E0BFAEE81F5080087_documentation_en-US" xlink:label="lab_colb_Businesscombinationpurchasepriceallocationsecuritiessoldunderagreementstorepurchase_F9F23261C0A6296E0BFAEE81F5080087" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business combination, purchase price allocation, securities sold under agreements to repurchase</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Businesscombinationpurchasepriceallocationsecuritiessoldunderagreementstorepurchase" xlink:label="loc_colb_Businesscombinationpurchasepriceallocationsecuritiessoldunderagreementstorepurchase_F9F23261C0A6296E0BFAEE81F5080087" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Businesscombinationpurchasepriceallocationsecuritiessoldunderagreementstorepurchase_F9F23261C0A6296E0BFAEE81F5080087" xlink:to="lab_colb_Businesscombinationpurchasepriceallocationsecuritiessoldunderagreementstorepurchase_F9F23261C0A6296E0BFAEE81F5080087" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationOtherLiabilities_A492436C299A7D5AA128EE81F5099FDC_negatedTerseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationOtherLiabilities_A492436C299A7D5AA128EE81F5099FDC" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationOtherLiabilities_A492436C299A7D5AA128EE81F5099FDC_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationOtherLiabilities_A492436C299A7D5AA128EE81F5099FDC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Other Liabilities</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationOtherLiabilities_A492436C299A7D5AA128EE81F5099FDC_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationOtherLiabilities_A492436C299A7D5AA128EE81F5099FDC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Other Liabilities</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationOtherLiabilities" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationOtherLiabilities_A492436C299A7D5AA128EE81F5099FDC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationOtherLiabilities_A492436C299A7D5AA128EE81F5099FDC" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationOtherLiabilities_A492436C299A7D5AA128EE81F5099FDC" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_CCFED0034F58DC9568BFEE81F509CE35_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_CCFED0034F58DC9568BFEE81F509CE35" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_CCFED0034F58DC9568BFEE81F509CE35_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_CCFED0034F58DC9568BFEE81F509CE35" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_CCFED0034F58DC9568BFEE81F509CE35" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_CCFED0034F58DC9568BFEE81F509CE35" xlink:to="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_CCFED0034F58DC9568BFEE81F509CE35" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationGoodwillAmount_5B8A36DEB9E097E1AF67EE81F509B293_terseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationGoodwillAmount_5B8A36DEB9E097E1AF67EE81F509B293" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Goodwill Amount</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationGoodwillAmount_5B8A36DEB9E097E1AF67EE81F509B293_label_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationGoodwillAmount_5B8A36DEB9E097E1AF67EE81F509B293" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Goodwill Amount</link:label>
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationGoodwillAmount_5B8A36DEB9E097E1AF67EE81F509B293_documentation_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationGoodwillAmount_5B8A36DEB9E097E1AF67EE81F509B293" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationGoodwillAmount" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationGoodwillAmount_5B8A36DEB9E097E1AF67EE81F509B293" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationGoodwillAmount_5B8A36DEB9E097E1AF67EE81F509B293" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationGoodwillAmount_5B8A36DEB9E097E1AF67EE81F509B293" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionsProFormaRevenue_9BF6ABB746317B6D4CF2EE81F5098525_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionsProFormaRevenue_9BF6ABB746317B6D4CF2EE81F5098525" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Pro Forma Revenue</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionsProFormaRevenue_9BF6ABB746317B6D4CF2EE81F5098525_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionsProFormaRevenue_9BF6ABB746317B6D4CF2EE81F5098525" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Pro Forma Revenue</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_9BF6ABB746317B6D4CF2EE81F5098525" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_9BF6ABB746317B6D4CF2EE81F5098525" xlink:to="lab_us-gaap_BusinessAcquisitionsProFormaRevenue_9BF6ABB746317B6D4CF2EE81F5098525" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_541B458CF6ECDAEC7C85EE81F50A234D_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_541B458CF6ECDAEC7C85EE81F50A234D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Pro Forma Net Income (Loss)</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_541B458CF6ECDAEC7C85EE81F50A234D_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_541B458CF6ECDAEC7C85EE81F50A234D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Pro Forma Net Income (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_541B458CF6ECDAEC7C85EE81F50A234D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_541B458CF6ECDAEC7C85EE81F50A234D" xlink:to="lab_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_541B458CF6ECDAEC7C85EE81F50A234D" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_7ED62F6F15F2FF1B2BDFEE81F50AC884_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_7ED62F6F15F2FF1B2BDFEE81F50AC884" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Pro Forma Earnings Per Share, Basic</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_7ED62F6F15F2FF1B2BDFEE81F50AC884_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_7ED62F6F15F2FF1B2BDFEE81F50AC884" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Pro Forma Earnings Per Share, Basic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_7ED62F6F15F2FF1B2BDFEE81F50AC884" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_7ED62F6F15F2FF1B2BDFEE81F50AC884" xlink:to="lab_us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic_7ED62F6F15F2FF1B2BDFEE81F50AC884" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_20509BABD6F6E02BBD69EE81F50AEBA4_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_20509BABD6F6E02BBD69EE81F50AEBA4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Pro Forma Earnings Per Share, Diluted</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_20509BABD6F6E02BBD69EE81F50AEBA4_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_20509BABD6F6E02BBD69EE81F50AEBA4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Pro Forma Earnings Per Share, Diluted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_20509BABD6F6E02BBD69EE81F50AEBA4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_20509BABD6F6E02BBD69EE81F50AEBA4" xlink:to="lab_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_20509BABD6F6E02BBD69EE81F50AEBA4" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerAbstract_6A58A45C6D37BEBD065B5B4F097FA0FC_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerAbstract_6A58A45C6D37BEBD065B5B4F097FA0FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from Contract with Customer [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_6A58A45C6D37BEBD065B5B4F097FA0FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_6A58A45C6D37BEBD065B5B4F097FA0FC" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerAbstract_6A58A45C6D37BEBD065B5B4F097FA0FC" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_D22320C49CBB4506F6215B4F097FCC68_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_D22320C49CBB4506F6215B4F097FCC68" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_D22320C49CBB4506F6215B4F097FCC68_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_D22320C49CBB4506F6215B4F097FCC68" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock" xlink:label="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_D22320C49CBB4506F6215B4F097FCC68" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_D22320C49CBB4506F6215B4F097FCC68" xlink:to="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_D22320C49CBB4506F6215B4F097FCC68" xlink:type="arc" />
    <link:label id="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsTextBlock_F1E1C70480C4DFBE9E7C5B4F0902050F_terseLabel_en-US" xlink:label="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsTextBlock_F1E1C70480C4DFBE9E7C5B4F0902050F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank and Federal Reserve Bank Borrowings [Text Block]</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsTextBlock_F1E1C70480C4DFBE9E7C5B4F0902050F_label_en-US" xlink:label="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsTextBlock_F1E1C70480C4DFBE9E7C5B4F0902050F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank and Federal Reserve Bank Borrowings [Text Block]</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsTextBlock_F1E1C70480C4DFBE9E7C5B4F0902050F_documentation_en-US" xlink:label="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsTextBlock_F1E1C70480C4DFBE9E7C5B4F0902050F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank and Federal Reserve Bank Borrowings [Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsTextBlock" xlink:label="loc_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsTextBlock_F1E1C70480C4DFBE9E7C5B4F0902050F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsTextBlock_F1E1C70480C4DFBE9E7C5B4F0902050F" xlink:to="lab_colb_FederalHomeLoanBankAndFederalReserveBankBorrowingsTextBlock_F1E1C70480C4DFBE9E7C5B4F0902050F" xlink:type="arc" />
    <link:label id="lab_colb_AccumulatedOtherComprehensiveIncomeLossTextBlock_A1FA641CF0B55A07D1135B4F07F94A6E_terseLabel_en-US" xlink:label="lab_colb_AccumulatedOtherComprehensiveIncomeLossTextBlock_A1FA641CF0B55A07D1135B4F07F94A6E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss) Note [Text Block]</link:label>
    <link:label id="lab_colb_AccumulatedOtherComprehensiveIncomeLossTextBlock_A1FA641CF0B55A07D1135B4F07F94A6E_label_en-US" xlink:label="lab_colb_AccumulatedOtherComprehensiveIncomeLossTextBlock_A1FA641CF0B55A07D1135B4F07F94A6E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Text Block]</link:label>
    <link:label id="lab_colb_AccumulatedOtherComprehensiveIncomeLossTextBlock_A1FA641CF0B55A07D1135B4F07F94A6E_documentation_en-US" xlink:label="lab_colb_AccumulatedOtherComprehensiveIncomeLossTextBlock_A1FA641CF0B55A07D1135B4F07F94A6E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss)</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AccumulatedOtherComprehensiveIncomeLossTextBlock" xlink:label="loc_colb_AccumulatedOtherComprehensiveIncomeLossTextBlock_A1FA641CF0B55A07D1135B4F07F94A6E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AccumulatedOtherComprehensiveIncomeLossTextBlock_A1FA641CF0B55A07D1135B4F07F94A6E" xlink:to="lab_colb_AccumulatedOtherComprehensiveIncomeLossTextBlock_A1FA641CF0B55A07D1135B4F07F94A6E" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_688E1351E7753AC14E315B4F08561287_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_688E1351E7753AC14E315B4F08561287" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_688E1351E7753AC14E315B4F08561287_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_688E1351E7753AC14E315B4F08561287" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_688E1351E7753AC14E315B4F08561287" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_688E1351E7753AC14E315B4F08561287" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentTextBlock_688E1351E7753AC14E315B4F08561287" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_24AAFCE497665FAA7277751000035338_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_24AAFCE497665FAA7277751000035338" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_24AAFCE497665FAA7277751000035338_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_24AAFCE497665FAA7277751000035338" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurements, Recurring and Nonrecurring [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_24AAFCE497665FAA7277751000035338" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_24AAFCE497665FAA7277751000035338" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_24AAFCE497665FAA7277751000035338" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementsNonrecurringMember_3A65D6C954A212C87EDA7510000580BF_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsNonrecurringMember_3A65D6C954A212C87EDA7510000580BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Measurements, Nonrecurring [Member]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsNonrecurringMember_3A65D6C954A212C87EDA7510000580BF_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsNonrecurringMember_3A65D6C954A212C87EDA7510000580BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurements, Nonrecurring [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementsNonrecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_3A65D6C954A212C87EDA7510000580BF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsNonrecurringMember_3A65D6C954A212C87EDA7510000580BF" xlink:to="lab_us-gaap_FairValueMeasurementsNonrecurringMember_3A65D6C954A212C87EDA7510000580BF" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_00323ED8248F063A1BCF751000056C63_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_00323ED8248F063A1BCF751000056C63" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Inputs, Assets, Quantitative Information</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_00323ED8248F063A1BCF751000056C63_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_00323ED8248F063A1BCF751000056C63" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_00323ED8248F063A1BCF751000056C63" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_00323ED8248F063A1BCF751000056C63" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_00323ED8248F063A1BCF751000056C63" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_D3C31D989A178DA4A07575100006413E_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_D3C31D989A178DA4A07575100006413E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Assets Accounted For Fair Value On Nonrecurring Basis</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_D3C31D989A178DA4A07575100006413E_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_D3C31D989A178DA4A07575100006413E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_D3C31D989A178DA4A07575100006413E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_D3C31D989A178DA4A07575100006413E" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisValuationTechniquesTextBlock_D3C31D989A178DA4A07575100006413E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_DB316E7794EE3F70E85675100006C3A6_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_DB316E7794EE3F70E85675100006C3A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping</link:label>
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_DB316E7794EE3F70E85675100006C3A6_label_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_DB316E7794EE3F70E85675100006C3A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, by Balance Sheet Grouping [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTextBlock_DB316E7794EE3F70E85675100006C3A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTextBlock_DB316E7794EE3F70E85675100006C3A6" xlink:to="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_DB316E7794EE3F70E85675100006C3A6" xlink:type="arc" />
    <link:label id="lab_colb_DebtInstrumentsTable_E0A01BBB3E278F2A4E3D5B4F0A2A34A6_terseLabel_en-US" xlink:label="lab_colb_DebtInstrumentsTable_E0A01BBB3E278F2A4E3D5B4F0A2A34A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instruments [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DebtInstrumentsTable" xlink:label="loc_colb_DebtInstrumentsTable_E0A01BBB3E278F2A4E3D5B4F0A2A34A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DebtInstrumentsTable_E0A01BBB3E278F2A4E3D5B4F0A2A34A6" xlink:to="lab_colb_DebtInstrumentsTable_E0A01BBB3E278F2A4E3D5B4F0A2A34A6" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesMember_7F9E4033BEF1AA2DB5625B4F0A2A7C9A_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesMember_7F9E4033BEF1AA2DB5625B4F0A2A7C9A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Advances [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMember" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMember_7F9E4033BEF1AA2DB5625B4F0A2A7C9A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesMember_7F9E4033BEF1AA2DB5625B4F0A2A7C9A" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesMember_7F9E4033BEF1AA2DB5625B4F0A2A7C9A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_8DCFDA4D9DC82DEB3C205B4F0A2AF5C1_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_8DCFDA4D9DC82DEB3C205B4F0A2AF5C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Maturities of Long-term Debt</link:label>
    <link:label id="lab_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_8DCFDA4D9DC82DEB3C205B4F0A2AF5C1_label_en-US" xlink:label="lab_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_8DCFDA4D9DC82DEB3C205B4F0A2AF5C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Maturities of Long-term Debt [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_8DCFDA4D9DC82DEB3C205B4F0A2AF5C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_8DCFDA4D9DC82DEB3C205B4F0A2AF5C1" xlink:to="lab_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_8DCFDA4D9DC82DEB3C205B4F0A2AF5C1" xlink:type="arc" />
    <link:label id="lab_colb_DebtInstrumentActivityForYearTableTextBlock_927632B928038900A4CE5B4F0A2AE582_terseLabel_en-US" xlink:label="lab_colb_DebtInstrumentActivityForYearTableTextBlock_927632B928038900A4CE5B4F0A2AE582" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument Activity For Year</link:label>
    <link:label id="lab_colb_DebtInstrumentActivityForYearTableTextBlock_927632B928038900A4CE5B4F0A2AE582_label_en-US" xlink:label="lab_colb_DebtInstrumentActivityForYearTableTextBlock_927632B928038900A4CE5B4F0A2AE582" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument Activity For Year [Table Text Block]</link:label>
    <link:label id="lab_colb_DebtInstrumentActivityForYearTableTextBlock_927632B928038900A4CE5B4F0A2AE582_documentation_en-US" xlink:label="lab_colb_DebtInstrumentActivityForYearTableTextBlock_927632B928038900A4CE5B4F0A2AE582" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument Activity For Year [Table Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DebtInstrumentActivityForYearTableTextBlock" xlink:label="loc_colb_DebtInstrumentActivityForYearTableTextBlock_927632B928038900A4CE5B4F0A2AE582" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DebtInstrumentActivityForYearTableTextBlock_927632B928038900A4CE5B4F0A2AE582" xlink:to="lab_colb_DebtInstrumentActivityForYearTableTextBlock_927632B928038900A4CE5B4F0A2AE582" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_45D7970E1D99B118F2395B4F0A2ACBAE_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_45D7970E1D99B118F2395B4F0A2ACBAE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Financial Instruments Owned and Pledged as Collateral</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock" xlink:label="loc_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_45D7970E1D99B118F2395B4F0A2ACBAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_45D7970E1D99B118F2395B4F0A2ACBAE" xlink:to="lab_us-gaap_ScheduleOfFinancialInstrumentsOwnedAndPledgedAsCollateralTextBlock_45D7970E1D99B118F2395B4F0A2ACBAE" xlink:type="arc" />
    <link:label id="lab_colb_JuniorsubordinateddebenturesTextBlock_AFBA5B87E504E223F3765B4F08763208_terseLabel_en-US" xlink:label="lab_colb_JuniorsubordinateddebenturesTextBlock_AFBA5B87E504E223F3765B4F08763208" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Junior subordinated debentures [Text Block]</link:label>
    <link:label id="lab_colb_JuniorsubordinateddebenturesTextBlock_AFBA5B87E504E223F3765B4F08763208_label_en-US" xlink:label="lab_colb_JuniorsubordinateddebenturesTextBlock_AFBA5B87E504E223F3765B4F08763208" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Junior subordinated debentures [Text Block]</link:label>
    <link:label id="lab_colb_JuniorsubordinateddebenturesTextBlock_AFBA5B87E504E223F3765B4F08763208_documentation_en-US" xlink:label="lab_colb_JuniorsubordinateddebenturesTextBlock_AFBA5B87E504E223F3765B4F08763208" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Junior subordinated debentures [Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_JuniorsubordinateddebenturesTextBlock" xlink:label="loc_colb_JuniorsubordinateddebenturesTextBlock_AFBA5B87E504E223F3765B4F08763208" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_JuniorsubordinateddebenturesTextBlock_AFBA5B87E504E223F3765B4F08763208" xlink:to="lab_colb_JuniorsubordinateddebenturesTextBlock_AFBA5B87E504E223F3765B4F08763208" xlink:type="arc" />
    <link:label id="lab_dei_LegalEntityAxis_E7993C51F30B32CAB36F5B4F08C47BD8_terseLabel_en-US" xlink:label="lab_dei_LegalEntityAxis_E7993C51F30B32CAB36F5B4F08C47BD8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_LegalEntityAxis" xlink:label="loc_dei_LegalEntityAxis_E7993C51F30B32CAB36F5B4F08C47BD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis_E7993C51F30B32CAB36F5B4F08C47BD8" xlink:to="lab_dei_LegalEntityAxis_E7993C51F30B32CAB36F5B4F08C47BD8" xlink:type="arc" />
    <link:label id="lab_dei_EntityDomain_0B788C8094886FA001405B4F08C43496_terseLabel_en-US" xlink:label="lab_dei_EntityDomain_0B788C8094886FA001405B4F08C43496" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityDomain" xlink:label="loc_dei_EntityDomain_0B788C8094886FA001405B4F08C43496" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain_0B788C8094886FA001405B4F08C43496" xlink:to="lab_dei_EntityDomain_0B788C8094886FA001405B4F08C43496" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssued1_30B1EC10886A7899EF3C5B4F08C457FE_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssued1_30B1EC10886A7899EF3C5B4F08C457FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Issued</link:label>
    <link:label id="lab_us-gaap_StockIssued1_30B1EC10886A7899EF3C5B4F08C457FE_label_en-US" xlink:label="lab_us-gaap_StockIssued1_30B1EC10886A7899EF3C5B4F08C457FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssued1" xlink:label="loc_us-gaap_StockIssued1_30B1EC10886A7899EF3C5B4F08C457FE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssued1_30B1EC10886A7899EF3C5B4F08C457FE" xlink:to="lab_us-gaap_StockIssued1_30B1EC10886A7899EF3C5B4F08C457FE" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseAbstract_C97494587A553C373D4D5B4F08C49788_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseAbstract_C97494587A553C373D4D5B4F08C49788" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Period Increase (Decrease) [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseAbstract_C97494587A553C373D4D5B4F08C49788" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseAbstract_C97494587A553C373D4D5B4F08C49788" xlink:to="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecreaseAbstract_C97494587A553C373D4D5B4F08C49788" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_4BE49FA68875C17EEF025B4F08C483B8_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_4BE49FA68875C17EEF025B4F08C483B8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Operating Activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_4BE49FA68875C17EEF025B4F08C483B8_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_4BE49FA68875C17EEF025B4F08C483B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_4BE49FA68875C17EEF025B4F08C483B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_4BE49FA68875C17EEF025B4F08C483B8" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_4BE49FA68875C17EEF025B4F08C483B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLoss_15024A4D8C5D6B152BFB5B4F08C4E1BE_verboseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_15024A4D8C5D6B152BFB5B4F08C4E1BE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_15024A4D8C5D6B152BFB5B4F08C4E1BE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_15024A4D8C5D6B152BFB5B4F08C4E1BE" xlink:to="lab_us-gaap_NetIncomeLoss_15024A4D8C5D6B152BFB5B4F08C4E1BE" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_F852D8679B4B683E9F8E5B4F08C49559_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_F852D8679B4B683E9F8E5B4F08C49559" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustments to reconcile net income to net cash provided by operating activities:</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_F852D8679B4B683E9F8E5B4F08C49559_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_F852D8679B4B683E9F8E5B4F08C49559" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_F852D8679B4B683E9F8E5B4F08C49559" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_F852D8679B4B683E9F8E5B4F08C49559" xlink:to="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_F852D8679B4B683E9F8E5B4F08C49559" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestments_3EB93918D5CDD529DCC05B4F08C4ECC0_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestments_3EB93918D5CDD529DCC05B4F08C4ECC0" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Equity in undistributed earnings of subsidiaries</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestments_3EB93918D5CDD529DCC05B4F08C4ECC0_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestments_3EB93918D5CDD529DCC05B4F08C4ECC0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income (Loss) from Equity Method Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_3EB93918D5CDD529DCC05B4F08C4ECC0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromEquityMethodInvestments_3EB93918D5CDD529DCC05B4F08C4ECC0" xlink:to="lab_us-gaap_IncomeLossFromEquityMethodInvestments_3EB93918D5CDD529DCC05B4F08C4ECC0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensation_69965717F626EC46C6AF5B4F08C49EA6_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_69965717F626EC46C6AF5B4F08C49EA6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock-based compensation expense</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensation_69965717F626EC46C6AF5B4F08C49EA6_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_69965717F626EC46C6AF5B4F08C49EA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_69965717F626EC46C6AF5B4F08C49EA6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensation_69965717F626EC46C6AF5B4F08C49EA6" xlink:to="lab_us-gaap_ShareBasedCompensation_69965717F626EC46C6AF5B4F08C49EA6" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_FEFCA7C9052F0A1F59425B4F08C4E64D_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_FEFCA7C9052F0A1F59425B4F08C4E64D" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net changes in other assets and liabilities</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_FEFCA7C9052F0A1F59425B4F08C4E64D_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_FEFCA7C9052F0A1F59425B4F08C4E64D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Operating Assets and Liabilities, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_FEFCA7C9052F0A1F59425B4F08C4E64D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_FEFCA7C9052F0A1F59425B4F08C4E64D" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_FEFCA7C9052F0A1F59425B4F08C4E64D" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_20F84C6D7087BE03980C5B4F08C4A631_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_20F84C6D7087BE03980C5B4F08C4A631" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_20F84C6D7087BE03980C5B4F08C4A631_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_20F84C6D7087BE03980C5B4F08C4A631" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_20F84C6D7087BE03980C5B4F08C4A631" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_20F84C6D7087BE03980C5B4F08C4A631" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_20F84C6D7087BE03980C5B4F08C4A631" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAcquiredFromAcquisition_98E0EBA98E2A9980DCDD5B4F08C425E3_terseLabel_en-US" xlink:label="lab_us-gaap_CashAcquiredFromAcquisition_98E0EBA98E2A9980DCDD5B4F08C425E3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net cash received in business combinations</link:label>
    <link:label id="lab_us-gaap_CashAcquiredFromAcquisition_98E0EBA98E2A9980DCDD5B4F08C425E3_label_en-US" xlink:label="lab_us-gaap_CashAcquiredFromAcquisition_98E0EBA98E2A9980DCDD5B4F08C425E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Acquired from Acquisition</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_98E0EBA98E2A9980DCDD5B4F08C425E3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAcquiredFromAcquisition_98E0EBA98E2A9980DCDD5B4F08C425E3" xlink:to="lab_us-gaap_CashAcquiredFromAcquisition_98E0EBA98E2A9980DCDD5B4F08C425E3" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4E316EA16CE71F10B7025B4F08C4EF58_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4E316EA16CE71F10B7025B4F08C4EF58" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investing Activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4E316EA16CE71F10B7025B4F08C4EF58_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4E316EA16CE71F10B7025B4F08C4EF58" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4E316EA16CE71F10B7025B4F08C4EF58" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4E316EA16CE71F10B7025B4F08C4EF58" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_4E316EA16CE71F10B7025B4F08C4EF58" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_3ED7E212F4821E288C515B4F08C4240E_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_3ED7E212F4821E288C515B4F08C4240E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_3ED7E212F4821E288C515B4F08C4240E_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_3ED7E212F4821E288C515B4F08C4240E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3ED7E212F4821E288C515B4F08C4240E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3ED7E212F4821E288C515B4F08C4240E" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_3ED7E212F4821E288C515B4F08C4240E" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_A3AFF0A182DB65DF5D335B4F08C4BBB5_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_A3AFF0A182DB65DF5D335B4F08C4BBB5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_A3AFF0A182DB65DF5D335B4F08C4BBB5_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_A3AFF0A182DB65DF5D335B4F08C4BBB5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_A3AFF0A182DB65DF5D335B4F08C4BBB5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_A3AFF0A182DB65DF5D335B4F08C4BBB5" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_A3AFF0A182DB65DF5D335B4F08C4BBB5" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_7A1D8F14957DE82DE06C5B4F08C48853_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_7A1D8F14957DE82DE06C5B4F08C48853" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payments of Ordinary Dividends, Preferred Stock and Preference Stock</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_7A1D8F14957DE82DE06C5B4F08C48853_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_7A1D8F14957DE82DE06C5B4F08C48853" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Ordinary Dividends, Preferred Stock and Preference Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:label="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_7A1D8F14957DE82DE06C5B4F08C48853" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_7A1D8F14957DE82DE06C5B4F08C48853" xlink:to="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_7A1D8F14957DE82DE06C5B4F08C48853" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_A5200102E3EC393AD8225B4F08C4FBE2_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_A5200102E3EC393AD8225B4F08C4FBE2" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Cash dividends paid</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_A5200102E3EC393AD8225B4F08C4FBE2_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_A5200102E3EC393AD8225B4F08C4FBE2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Ordinary Dividends, Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_A5200102E3EC393AD8225B4F08C4FBE2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividendsCommonStock_A5200102E3EC393AD8225B4F08C4FBE2" xlink:to="lab_us-gaap_PaymentsOfDividendsCommonStock_A5200102E3EC393AD8225B4F08C4FBE2" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfEquity_9673105E02D8D357D12E5B4F08C4F642_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfEquity_9673105E02D8D357D12E5B4F08C4F642" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payments for Repurchase of Equity</link:label>
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfEquity_9673105E02D8D357D12E5B4F08C4F642_label_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfEquity_9673105E02D8D357D12E5B4F08C4F642" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Repurchase of Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForRepurchaseOfEquity" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfEquity_9673105E02D8D357D12E5B4F08C4F642" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForRepurchaseOfEquity_9673105E02D8D357D12E5B4F08C4F642" xlink:to="lab_us-gaap_PaymentsForRepurchaseOfEquity_9673105E02D8D357D12E5B4F08C4F642" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_824AC65E6FA0D34AE5B05B4F08C464E0_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_824AC65E6FA0D34AE5B05B4F08C464E0" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Purchase and retirement of common stock</link:label>
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_824AC65E6FA0D34AE5B05B4F08C464E0_label_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_824AC65E6FA0D34AE5B05B4F08C464E0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Repurchase of Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_824AC65E6FA0D34AE5B05B4F08C464E0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_824AC65E6FA0D34AE5B05B4F08C464E0" xlink:to="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_824AC65E6FA0D34AE5B05B4F08C464E0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromStockOptionsExercised_AF57C1158C01C4EDA78C5B4F08C4E1EE_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised_AF57C1158C01C4EDA78C5B4F08C4E1EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from exercise of stock options</link:label>
    <link:label id="lab_us-gaap_ProceedsFromStockOptionsExercised_AF57C1158C01C4EDA78C5B4F08C4E1EE_label_en-US" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised_AF57C1158C01C4EDA78C5B4F08C4E1EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Stock Options Exercised</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_AF57C1158C01C4EDA78C5B4F08C4E1EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromStockOptionsExercised_AF57C1158C01C4EDA78C5B4F08C4E1EE" xlink:to="lab_us-gaap_ProceedsFromStockOptionsExercised_AF57C1158C01C4EDA78C5B4F08C4E1EE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_1C7AA38AA07BC5EC535D5B4F08C4A335_terseLabel_en-US" xlink:label="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_1C7AA38AA07BC5EC535D5B4F08C4A335" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Excess tax benefit from stock-based compensation</link:label>
    <link:label id="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_1C7AA38AA07BC5EC535D5B4F08C4A335_label_en-US" xlink:label="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_1C7AA38AA07BC5EC535D5B4F08C4A335" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Excess Tax Benefit from Share-based Compensation, Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_1C7AA38AA07BC5EC535D5B4F08C4A335" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_1C7AA38AA07BC5EC535D5B4F08C4A335" xlink:to="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_1C7AA38AA07BC5EC535D5B4F08C4A335" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_9C64A613415D1F6650075B4F08C4D466_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_9C64A613415D1F6650075B4F08C4D466" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_9C64A613415D1F6650075B4F08C4D466_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_9C64A613415D1F6650075B4F08C4D466" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_9C64A613415D1F6650075B4F08C4D466" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_9C64A613415D1F6650075B4F08C4D466" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_9C64A613415D1F6650075B4F08C4D466" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_223E2A62876AC6D2CE675B4F08C4DC26_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_223E2A62876AC6D2CE675B4F08C4DC26" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase (decrease) in cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_223E2A62876AC6D2CE675B4F08C4DC26_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_223E2A62876AC6D2CE675B4F08C4DC26" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Period Increase (Decrease)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_223E2A62876AC6D2CE675B4F08C4DC26" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_223E2A62876AC6D2CE675B4F08C4DC26" xlink:to="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_223E2A62876AC6D2CE675B4F08C4DC26" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_E5C12B0D0F9195EE06B45B4F08C4CC84_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_E5C12B0D0F9195EE06B45B4F08C4CC84" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents at beginning of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_E5C12B0D0F9195EE06B45B4F08C4CC84" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_E5C12B0D0F9195EE06B45B4F08C4CC84" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_E5C12B0D0F9195EE06B45B4F08C4CC84" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_7564D8E6B7E4137658E85B4F08C4131E_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_7564D8E6B7E4137658E85B4F08C4131E" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents at end of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7564D8E6B7E4137658E85B4F08C4131E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7564D8E6B7E4137658E85B4F08C4131E" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_7564D8E6B7E4137658E85B4F08C4131E" xlink:type="arc" />
    <link:label id="lab_colb_OtherRealEstateOwnedTable_4FB1FBE4EF923E9D6F59B9E560DCE7F0_terseLabel_en-US" xlink:label="lab_colb_OtherRealEstateOwnedTable_4FB1FBE4EF923E9D6F59B9E560DCE7F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned [Table]</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedTable_4FB1FBE4EF923E9D6F59B9E560DCE7F0_label_en-US" xlink:label="lab_colb_OtherRealEstateOwnedTable_4FB1FBE4EF923E9D6F59B9E560DCE7F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned [Table]</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedTable_4FB1FBE4EF923E9D6F59B9E560DCE7F0_documentation_en-US" xlink:label="lab_colb_OtherRealEstateOwnedTable_4FB1FBE4EF923E9D6F59B9E560DCE7F0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned [Table]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OtherRealEstateOwnedTable" xlink:label="loc_colb_OtherRealEstateOwnedTable_4FB1FBE4EF923E9D6F59B9E560DCE7F0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OtherRealEstateOwnedTable_4FB1FBE4EF923E9D6F59B9E560DCE7F0" xlink:to="lab_colb_OtherRealEstateOwnedTable_4FB1FBE4EF923E9D6F59B9E560DCE7F0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_2911A92CAD77287B0C87B9E560DCFB41_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_2911A92CAD77287B0C87B9E560DCFB41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Financing Receivable, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_2911A92CAD77287B0C87B9E560DCFB41" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_2911A92CAD77287B0C87B9E560DCFB41" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_2911A92CAD77287B0C87B9E560DCFB41" xlink:type="arc" />
    <link:label id="lab_colb_RealEstateOwnedByTypeAxis_F8A26C8B5900C4E8F405B9E560EC1B4D_terseLabel_en-US" xlink:label="lab_colb_RealEstateOwnedByTypeAxis_F8A26C8B5900C4E8F405B9E560EC1B4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real Estate Owned By Type [Axis]</link:label>
    <link:label id="lab_colb_RealEstateOwnedByTypeAxis_F8A26C8B5900C4E8F405B9E560EC1B4D_label_en-US" xlink:label="lab_colb_RealEstateOwnedByTypeAxis_F8A26C8B5900C4E8F405B9E560EC1B4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Owned By Type [Axis]</link:label>
    <link:label id="lab_colb_RealEstateOwnedByTypeAxis_F8A26C8B5900C4E8F405B9E560EC1B4D_documentation_en-US" xlink:label="lab_colb_RealEstateOwnedByTypeAxis_F8A26C8B5900C4E8F405B9E560EC1B4D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Real Estate Owned By Type [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_RealEstateOwnedByTypeAxis" xlink:label="loc_colb_RealEstateOwnedByTypeAxis_F8A26C8B5900C4E8F405B9E560EC1B4D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_RealEstateOwnedByTypeAxis_F8A26C8B5900C4E8F405B9E560EC1B4D" xlink:to="lab_colb_RealEstateOwnedByTypeAxis_F8A26C8B5900C4E8F405B9E560EC1B4D" xlink:type="arc" />
    <link:label id="lab_colb_RealEstateOwnedTypeDomain_36CC25E48713C70DD6BEB9E560EC64AD_terseLabel_en-US" xlink:label="lab_colb_RealEstateOwnedTypeDomain_36CC25E48713C70DD6BEB9E560EC64AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real Estate Owned, Type [Domain]</link:label>
    <link:label id="lab_colb_RealEstateOwnedTypeDomain_36CC25E48713C70DD6BEB9E560EC64AD_label_en-US" xlink:label="lab_colb_RealEstateOwnedTypeDomain_36CC25E48713C70DD6BEB9E560EC64AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Owned, Type [Domain]</link:label>
    <link:label id="lab_colb_RealEstateOwnedTypeDomain_36CC25E48713C70DD6BEB9E560EC64AD_documentation_en-US" xlink:label="lab_colb_RealEstateOwnedTypeDomain_36CC25E48713C70DD6BEB9E560EC64AD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Real Estate Owned, Type [Domain]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_RealEstateOwnedTypeDomain" xlink:label="loc_colb_RealEstateOwnedTypeDomain_36CC25E48713C70DD6BEB9E560EC64AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_RealEstateOwnedTypeDomain_36CC25E48713C70DD6BEB9E560EC64AD" xlink:to="lab_colb_RealEstateOwnedTypeDomain_36CC25E48713C70DD6BEB9E560EC64AD" xlink:type="arc" />
    <link:label id="lab_colb_OtherRealEstateOwnedLineItems_C6B01E5BB6075724BD63B9E560ECDA69_terseLabel_en-US" xlink:label="lab_colb_OtherRealEstateOwnedLineItems_C6B01E5BB6075724BD63B9E560ECDA69" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned [Line Items]</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedLineItems_C6B01E5BB6075724BD63B9E560ECDA69_label_en-US" xlink:label="lab_colb_OtherRealEstateOwnedLineItems_C6B01E5BB6075724BD63B9E560ECDA69" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned [Line Items]</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedLineItems_C6B01E5BB6075724BD63B9E560ECDA69_documentation_en-US" xlink:label="lab_colb_OtherRealEstateOwnedLineItems_C6B01E5BB6075724BD63B9E560ECDA69" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned [Line Items]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OtherRealEstateOwnedLineItems" xlink:label="loc_colb_OtherRealEstateOwnedLineItems_C6B01E5BB6075724BD63B9E560ECDA69" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OtherRealEstateOwnedLineItems_C6B01E5BB6075724BD63B9E560ECDA69" xlink:to="lab_colb_OtherRealEstateOwnedLineItems_C6B01E5BB6075724BD63B9E560ECDA69" xlink:type="arc" />
    <link:label id="lab_colb_OtherRealEstateOwnedestablishedthroughacquisition_80AC28D0B7A7FFCC764DB9E560ECCDAE_terseLabel_en-US" xlink:label="lab_colb_OtherRealEstateOwnedestablishedthroughacquisition_80AC28D0B7A7FFCC764DB9E560ECCDAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned, established through acquisition</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedestablishedthroughacquisition_80AC28D0B7A7FFCC764DB9E560ECCDAE_label_en-US" xlink:label="lab_colb_OtherRealEstateOwnedestablishedthroughacquisition_80AC28D0B7A7FFCC764DB9E560ECCDAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned, established through acquisition</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedestablishedthroughacquisition_80AC28D0B7A7FFCC764DB9E560ECCDAE_documentation_en-US" xlink:label="lab_colb_OtherRealEstateOwnedestablishedthroughacquisition_80AC28D0B7A7FFCC764DB9E560ECCDAE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned, established through acquisition</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OtherRealEstateOwnedestablishedthroughacquisition" xlink:label="loc_colb_OtherRealEstateOwnedestablishedthroughacquisition_80AC28D0B7A7FFCC764DB9E560ECCDAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OtherRealEstateOwnedestablishedthroughacquisition_80AC28D0B7A7FFCC764DB9E560ECCDAE" xlink:to="lab_colb_OtherRealEstateOwnedestablishedthroughacquisition_80AC28D0B7A7FFCC764DB9E560ECCDAE" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealEstateAcquiredThroughForeclosure_1D348DDF1BD34FB4F956B9E560EC763B_periodStartLabel_en-US" xlink:label="lab_us-gaap_RealEstateAcquiredThroughForeclosure_1D348DDF1BD34FB4F956B9E560EC763B" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance, beginning of period</link:label>
    <link:label id="lab_us-gaap_RealEstateAcquiredThroughForeclosure_1D348DDF1BD34FB4F956B9E560EC763B_label_en-US" xlink:label="lab_us-gaap_RealEstateAcquiredThroughForeclosure_1D348DDF1BD34FB4F956B9E560EC763B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Acquired Through Foreclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RealEstateAcquiredThroughForeclosure" xlink:label="loc_us-gaap_RealEstateAcquiredThroughForeclosure_1D348DDF1BD34FB4F956B9E560EC763B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateAcquiredThroughForeclosure_1D348DDF1BD34FB4F956B9E560EC763B" xlink:to="lab_us-gaap_RealEstateAcquiredThroughForeclosure_1D348DDF1BD34FB4F956B9E560EC763B" xlink:type="arc" />
    <link:label id="lab_colb_RealEstateAcquiredThroughForeclosureTransfersInNetOfWriteDowns_009C8C1B3D5D7C8E2854B9E560EC286E_verboseLabel_en-US" xlink:label="lab_colb_RealEstateAcquiredThroughForeclosureTransfersInNetOfWriteDowns_009C8C1B3D5D7C8E2854B9E560EC286E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Transfers in</link:label>
    <link:label id="lab_colb_RealEstateAcquiredThroughForeclosureTransfersInNetOfWriteDowns_009C8C1B3D5D7C8E2854B9E560EC286E_label_en-US" xlink:label="lab_colb_RealEstateAcquiredThroughForeclosureTransfersInNetOfWriteDowns_009C8C1B3D5D7C8E2854B9E560EC286E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Acquired Through Foreclosure Transfers In Net Of Write Downs</link:label>
    <link:label id="lab_colb_RealEstateAcquiredThroughForeclosureTransfersInNetOfWriteDowns_009C8C1B3D5D7C8E2854B9E560EC286E_documentation_en-US" xlink:label="lab_colb_RealEstateAcquiredThroughForeclosureTransfersInNetOfWriteDowns_009C8C1B3D5D7C8E2854B9E560EC286E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Real Estate Acquired Through Foreclosure Transfers In Net Of Write Downs</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_RealEstateAcquiredThroughForeclosureTransfersInNetOfWriteDowns" xlink:label="loc_colb_RealEstateAcquiredThroughForeclosureTransfersInNetOfWriteDowns_009C8C1B3D5D7C8E2854B9E560EC286E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_RealEstateAcquiredThroughForeclosureTransfersInNetOfWriteDowns_009C8C1B3D5D7C8E2854B9E560EC286E" xlink:to="lab_colb_RealEstateAcquiredThroughForeclosureTransfersInNetOfWriteDowns_009C8C1B3D5D7C8E2854B9E560EC286E" xlink:type="arc" />
    <link:label id="lab_colb_TransferOtherRealEstateWriteDown_3D081CDF0CFB3D9C7954B9E560ECDEFC_negatedLabel_en-US" xlink:label="lab_colb_TransferOtherRealEstateWriteDown_3D081CDF0CFB3D9C7954B9E560ECDEFC" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Valuation adjustments</link:label>
    <link:label id="lab_colb_TransferOtherRealEstateWriteDown_3D081CDF0CFB3D9C7954B9E560ECDEFC_label_en-US" xlink:label="lab_colb_TransferOtherRealEstateWriteDown_3D081CDF0CFB3D9C7954B9E560ECDEFC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transfer Other Real Estate Write Down</link:label>
    <link:label id="lab_colb_TransferOtherRealEstateWriteDown_3D081CDF0CFB3D9C7954B9E560ECDEFC_documentation_en-US" xlink:label="lab_colb_TransferOtherRealEstateWriteDown_3D081CDF0CFB3D9C7954B9E560ECDEFC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Transfer Other Real Estate Write Down</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_TransferOtherRealEstateWriteDown" xlink:label="loc_colb_TransferOtherRealEstateWriteDown_3D081CDF0CFB3D9C7954B9E560ECDEFC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_TransferOtherRealEstateWriteDown_3D081CDF0CFB3D9C7954B9E560ECDEFC" xlink:to="lab_colb_TransferOtherRealEstateWriteDown_3D081CDF0CFB3D9C7954B9E560ECDEFC" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_3DB10DB580591E5C5B31B9E560EC7097_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_3DB10DB580591E5C5B31B9E560EC7097" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_3DB10DB580591E5C5B31B9E560EC7097_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_3DB10DB580591E5C5B31B9E560EC7097" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Wholly Owned Real Estate and Real Estate Acquired in Settlement of Loans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans" xlink:label="loc_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_3DB10DB580591E5C5B31B9E560EC7097" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_3DB10DB580591E5C5B31B9E560EC7097" xlink:to="lab_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_3DB10DB580591E5C5B31B9E560EC7097" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_B0C987FA2DB0A15646DFB9E560ECAD52_terseLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_B0C987FA2DB0A15646DFB9E560ECAD52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized gain on sale of other real estate owned</link:label>
    <link:label id="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_B0C987FA2DB0A15646DFB9E560ECAD52_label_en-US" xlink:label="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_B0C987FA2DB0A15646DFB9E560ECAD52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gains (Losses) on Sales of Other Real Estate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainsLossesOnSalesOfOtherRealEstate" xlink:label="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_B0C987FA2DB0A15646DFB9E560ECAD52" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_B0C987FA2DB0A15646DFB9E560ECAD52" xlink:to="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_B0C987FA2DB0A15646DFB9E560ECAD52" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealEstateAcquiredThroughForeclosure_46F295F72092AE5208C7B9E560ECC93A_periodEndLabel_en-US" xlink:label="lab_us-gaap_RealEstateAcquiredThroughForeclosure_46F295F72092AE5208C7B9E560ECC93A" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance, end of period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RealEstateAcquiredThroughForeclosure" xlink:label="loc_us-gaap_RealEstateAcquiredThroughForeclosure_46F295F72092AE5208C7B9E560ECC93A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateAcquiredThroughForeclosure_46F295F72092AE5208C7B9E560ECC93A" xlink:to="lab_us-gaap_RealEstateAcquiredThroughForeclosure_46F295F72092AE5208C7B9E560ECC93A" xlink:type="arc" />
    <link:label id="lab_us-gaap_MortgageLoansInProcessOfForeclosureAmount_1348BF887F45759AF980B9E560ECF9CF_terseLabel_en-US" xlink:label="lab_us-gaap_MortgageLoansInProcessOfForeclosureAmount_1348BF887F45759AF980B9E560ECF9CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage Loans in Process of Foreclosure, Amount</link:label>
    <link:label id="lab_us-gaap_MortgageLoansInProcessOfForeclosureAmount_1348BF887F45759AF980B9E560ECF9CF_label_en-US" xlink:label="lab_us-gaap_MortgageLoansInProcessOfForeclosureAmount_1348BF887F45759AF980B9E560ECF9CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Loans in Process of Foreclosure, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MortgageLoansInProcessOfForeclosureAmount" xlink:label="loc_us-gaap_MortgageLoansInProcessOfForeclosureAmount_1348BF887F45759AF980B9E560ECF9CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgageLoansInProcessOfForeclosureAmount_1348BF887F45759AF980B9E560ECF9CF" xlink:to="lab_us-gaap_MortgageLoansInProcessOfForeclosureAmount_1348BF887F45759AF980B9E560ECF9CF" xlink:type="arc" />
    <link:label id="lab_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_0CB5B4BDE17AF6916F6A750FFF68348C_verboseLabel_en-US" xlink:label="lab_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_0CB5B4BDE17AF6916F6A750FFF68348C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">U.S. Government Agency and Government-Sponsored Enterprise Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_0CB5B4BDE17AF6916F6A750FFF68348C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_0CB5B4BDE17AF6916F6A750FFF68348C" xlink:to="lab_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_0CB5B4BDE17AF6916F6A750FFF68348C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAmortizedCost_334AA94420B2467CEDEB750FFF6911B5_totalLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAmortizedCost_334AA94420B2467CEDEB750FFF6911B5" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Amortized Cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAmortizedCost_334AA94420B2467CEDEB750FFF6911B5_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAmortizedCost_334AA94420B2467CEDEB750FFF6911B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Amortized Cost Basis</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_334AA94420B2467CEDEB750FFF6911B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_334AA94420B2467CEDEB750FFF6911B5" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesAmortizedCost_334AA94420B2467CEDEB750FFF6911B5" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_72392636EB3EE1BC106F750FFF694546_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_72392636EB3EE1BC106F750FFF694546" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_72392636EB3EE1BC106F750FFF694546_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_72392636EB3EE1BC106F750FFF694546" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_72392636EB3EE1BC106F750FFF694546" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_72392636EB3EE1BC106F750FFF694546" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_72392636EB3EE1BC106F750FFF694546" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_8A284DA085CB1D2C1593750FFF69C7CD_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_8A284DA085CB1D2C1593750FFF69C7CD" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_8A284DA085CB1D2C1593750FFF69C7CD_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_8A284DA085CB1D2C1593750FFF69C7CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_8A284DA085CB1D2C1593750FFF69C7CD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_8A284DA085CB1D2C1593750FFF69C7CD" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_8A284DA085CB1D2C1593750FFF69C7CD" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquitySecuritiesFvNiGainLoss_AB4E86C8BF69FF28F5EEA5D63FB12A49_terseLabel_en-US" xlink:label="lab_us-gaap_EquitySecuritiesFvNiGainLoss_AB4E86C8BF69FF28F5EEA5D63FB12A49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Securities, FV-NI, Gain (Loss)</link:label>
    <link:label id="lab_us-gaap_EquitySecuritiesFvNiGainLoss_AB4E86C8BF69FF28F5EEA5D63FB12A49_label_en-US" xlink:label="lab_us-gaap_EquitySecuritiesFvNiGainLoss_AB4E86C8BF69FF28F5EEA5D63FB12A49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Securities, FV-NI, Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesFvNiGainLoss" xlink:label="loc_us-gaap_EquitySecuritiesFvNiGainLoss_AB4E86C8BF69FF28F5EEA5D63FB12A49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySecuritiesFvNiGainLoss_AB4E86C8BF69FF28F5EEA5D63FB12A49" xlink:to="lab_us-gaap_EquitySecuritiesFvNiGainLoss_AB4E86C8BF69FF28F5EEA5D63FB12A49" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_E20C5A354C58B024844AA5DC23C9E80A_terseLabel_en-US" xlink:label="lab_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_E20C5A354C58B024844AA5DC23C9E80A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Securities, FV-NI, Realized Gain (Loss)</link:label>
    <link:label id="lab_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_E20C5A354C58B024844AA5DC23C9E80A_label_en-US" xlink:label="lab_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_E20C5A354C58B024844AA5DC23C9E80A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Securities, FV-NI, Realized Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesFvNiRealizedGainLoss" xlink:label="loc_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_E20C5A354C58B024844AA5DC23C9E80A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_E20C5A354C58B024844AA5DC23C9E80A" xlink:to="lab_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_E20C5A354C58B024844AA5DC23C9E80A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_AFFB241171EFAD812E34A5D5371C374E_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_AFFB241171EFAD812E34A5D5371C374E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Less than 12 Months Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_AFFB241171EFAD812E34A5D5371C374E_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_AFFB241171EFAD812E34A5D5371C374E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_AFFB241171EFAD812E34A5D5371C374E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_AFFB241171EFAD812E34A5D5371C374E" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_AFFB241171EFAD812E34A5D5371C374E" xlink:type="arc" />
    <link:label id="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAggregateLossInstant_800BF8BDD72A5B261103A5D5371CA11C_terseLabel_en-US" xlink:label="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAggregateLossInstant_800BF8BDD72A5B261103A5D5371CA11C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss, Instant</link:label>
    <link:label id="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAggregateLossInstant_800BF8BDD72A5B261103A5D5371CA11C_label_en-US" xlink:label="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAggregateLossInstant_800BF8BDD72A5B261103A5D5371CA11C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss, Instant</link:label>
    <link:label id="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAggregateLossInstant_800BF8BDD72A5B261103A5D5371CA11C_documentation_en-US" xlink:label="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAggregateLossInstant_800BF8BDD72A5B261103A5D5371CA11C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAggregateLossInstant" xlink:label="loc_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAggregateLossInstant_800BF8BDD72A5B261103A5D5371CA11C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAggregateLossInstant_800BF8BDD72A5B261103A5D5371CA11C" xlink:to="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessthan12MonthsAggregateLossInstant_800BF8BDD72A5B261103A5D5371CA11C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_C071728C858646A0A450A5D5371C68F0_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_C071728C858646A0A450A5D5371C68F0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">12 Months or More Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_C071728C858646A0A450A5D5371C68F0_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_C071728C858646A0A450A5D5371C68F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_C071728C858646A0A450A5D5371C68F0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_C071728C858646A0A450A5D5371C68F0" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_C071728C858646A0A450A5D5371C68F0" xlink:type="arc" />
    <link:label id="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossinstant_B3A751CC7128EDCC956CA5D5371C42AD_negatedLabel_en-US" xlink:label="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossinstant_B3A751CC7128EDCC956CA5D5371C42AD" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">12 Months or More Unrealized Losses</link:label>
    <link:label id="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossinstant_B3A751CC7128EDCC956CA5D5371C42AD_label_en-US" xlink:label="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossinstant_B3A751CC7128EDCC956CA5D5371C42AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss, instant</link:label>
    <link:label id="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossinstant_B3A751CC7128EDCC956CA5D5371C42AD_documentation_en-US" xlink:label="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossinstant_B3A751CC7128EDCC956CA5D5371C42AD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossinstant" xlink:label="loc_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossinstant_B3A751CC7128EDCC956CA5D5371C42AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossinstant_B3A751CC7128EDCC956CA5D5371C42AD" xlink:to="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsorLongerAggregateLossinstant_B3A751CC7128EDCC956CA5D5371C42AD" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_A89C94060495EFEAABFCA5D5371C72EC_totalLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_A89C94060495EFEAABFCA5D5371C72EC" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_A89C94060495EFEAABFCA5D5371C72EC_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_A89C94060495EFEAABFCA5D5371C72EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_A89C94060495EFEAABFCA5D5371C72EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_A89C94060495EFEAABFCA5D5371C72EC" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_A89C94060495EFEAABFCA5D5371C72EC" xlink:type="arc" />
    <link:label id="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossinstant_2DE5FA542C3BAF898624A5D5371CFFB1_negatedTotalLabel_en-US" xlink:label="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossinstant_2DE5FA542C3BAF898624A5D5371CFFB1" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="en-US">Total Unrealized Losses</link:label>
    <link:label id="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossinstant_2DE5FA542C3BAF898624A5D5371CFFB1_label_en-US" xlink:label="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossinstant_2DE5FA542C3BAF898624A5D5371CFFB1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss, instant</link:label>
    <link:label id="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossinstant_2DE5FA542C3BAF898624A5D5371CFFB1_documentation_en-US" xlink:label="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossinstant_2DE5FA542C3BAF898624A5D5371CFFB1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of unrealized loss on securities classified as available-for-sale.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossinstant" xlink:label="loc_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossinstant_2DE5FA542C3BAF898624A5D5371CFFB1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossinstant_2DE5FA542C3BAF898624A5D5371CFFB1" xlink:to="lab_colb_AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLossinstant_2DE5FA542C3BAF898624A5D5371CFFB1" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_CB0459A5E69F58B141F6A5ECF9D28752_terseLabel_en-US" xlink:label="lab_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_CB0459A5E69F58B141F6A5ECF9D28752" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity Securities, FV-NI, Unrealized Gain (Loss)</link:label>
    <link:label id="lab_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_CB0459A5E69F58B141F6A5ECF9D28752_label_en-US" xlink:label="lab_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_CB0459A5E69F58B141F6A5ECF9D28752" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Securities, FV-NI, Unrealized Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_CB0459A5E69F58B141F6A5ECF9D28752" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_CB0459A5E69F58B141F6A5ECF9D28752" xlink:to="lab_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_CB0459A5E69F58B141F6A5ECF9D28752" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_384D6F92DC7996DD58CFB9D11883ED0F_label_en-US" xlink:label="lab_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_384D6F92DC7996DD58CFB9D11883ED0F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments, Debt and Equity Securities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_384D6F92DC7996DD58CFB9D11883ED0F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_384D6F92DC7996DD58CFB9D11883ED0F" xlink:to="lab_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_384D6F92DC7996DD58CFB9D11883ED0F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_610751C8F3E26D490D38B9D118833158_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_610751C8F3E26D490D38B9D118833158" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Gross Realized Gains</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_610751C8F3E26D490D38B9D118833158_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_610751C8F3E26D490D38B9D118833158" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Gross Realized Gains</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedGains" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_610751C8F3E26D490D38B9D118833158" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_610751C8F3E26D490D38B9D118833158" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGains_610751C8F3E26D490D38B9D118833158" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_55A1D7075604804D3FF0B9D118836EB1_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_55A1D7075604804D3FF0B9D118836EB1" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Gross Realized Losses</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_55A1D7075604804D3FF0B9D118836EB1_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_55A1D7075604804D3FF0B9D118836EB1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Gross Realized Losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_55A1D7075604804D3FF0B9D118836EB1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_55A1D7075604804D3FF0B9D118836EB1" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses_55A1D7075604804D3FF0B9D118836EB1" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquitySecuritiesFvNiGainLoss_305EE29B6FA903A1F60DB9D11886C19B_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_EquitySecuritiesFvNiGainLoss_305EE29B6FA903A1F60DB9D11886C19B" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Equity Securities, FV-NI, Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySecuritiesFvNiGainLoss" xlink:label="loc_us-gaap_EquitySecuritiesFvNiGainLoss_305EE29B6FA903A1F60DB9D11886C19B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySecuritiesFvNiGainLoss_305EE29B6FA903A1F60DB9D11886C19B" xlink:to="lab_us-gaap_EquitySecuritiesFvNiGainLoss_305EE29B6FA903A1F60DB9D11886C19B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtAndEquitySecuritiesGainLoss_0EB7438065C5E75FE707B9D11886B4BB_terseLabel_en-US" xlink:label="lab_us-gaap_DebtAndEquitySecuritiesGainLoss_0EB7438065C5E75FE707B9D11886B4BB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt and Equity Securities, Gain (Loss)</link:label>
    <link:label id="lab_us-gaap_DebtAndEquitySecuritiesGainLoss_0EB7438065C5E75FE707B9D11886B4BB_label_en-US" xlink:label="lab_us-gaap_DebtAndEquitySecuritiesGainLoss_0EB7438065C5E75FE707B9D11886B4BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt and Equity Securities, Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtAndEquitySecuritiesGainLoss" xlink:label="loc_us-gaap_DebtAndEquitySecuritiesGainLoss_0EB7438065C5E75FE707B9D11886B4BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtAndEquitySecuritiesGainLoss_0EB7438065C5E75FE707B9D11886B4BB" xlink:to="lab_us-gaap_DebtAndEquitySecuritiesGainLoss_0EB7438065C5E75FE707B9D11886B4BB" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfStockholdersEquityAbstract_26646038BE45C2045692A59154293394_label_en-US" xlink:label="lab_us-gaap_StatementOfStockholdersEquityAbstract_26646038BE45C2045692A59154293394" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Stockholders' Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="loc_us-gaap_StatementOfStockholdersEquityAbstract_26646038BE45C2045692A59154293394" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract_26646038BE45C2045692A59154293394" xlink:to="lab_us-gaap_StatementOfStockholdersEquityAbstract_26646038BE45C2045692A59154293394" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountingStandardsUpdate201609Member_0E1D72809E534FC8F586A5915429CBB9_terseLabel_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201609Member_0E1D72809E534FC8F586A5915429CBB9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounting Standards Update 2016-09 [Member]</link:label>
    <link:label id="lab_us-gaap_AccountingStandardsUpdate201609Member_0E1D72809E534FC8F586A5915429CBB9_label_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201609Member_0E1D72809E534FC8F586A5915429CBB9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Standards Update 2016-09 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201609Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201609Member_0E1D72809E534FC8F586A5915429CBB9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountingStandardsUpdate201609Member_0E1D72809E534FC8F586A5915429CBB9" xlink:to="lab_us-gaap_AccountingStandardsUpdate201609Member_0E1D72809E534FC8F586A5915429CBB9" xlink:type="arc" />
    <link:label id="lab_colb_AccountingStandardsUpdate201802Member_174D73BF9AA6EC7099AFA591542978FB_verboseLabel_en-US" xlink:label="lab_colb_AccountingStandardsUpdate201802Member_174D73BF9AA6EC7099AFA591542978FB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accounting Standards Update 2018-02 [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AccountingStandardsUpdate201802Member" xlink:label="loc_colb_AccountingStandardsUpdate201802Member_174D73BF9AA6EC7099AFA591542978FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AccountingStandardsUpdate201802Member_174D73BF9AA6EC7099AFA591542978FB" xlink:to="lab_colb_AccountingStandardsUpdate201802Member_174D73BF9AA6EC7099AFA591542978FB" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockMember_479D19FFEA66E3DC23AEA59154292DCE_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockMember_479D19FFEA66E3DC23AEA59154292DCE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock [Member]</link:label>
    <link:label id="lab_us-gaap_PreferredStockMember_479D19FFEA66E3DC23AEA59154292DCE_label_en-US" xlink:label="lab_us-gaap_PreferredStockMember_479D19FFEA66E3DC23AEA59154292DCE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaap_PreferredStockMember_479D19FFEA66E3DC23AEA59154292DCE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockMember_479D19FFEA66E3DC23AEA59154292DCE" xlink:to="lab_us-gaap_PreferredStockMember_479D19FFEA66E3DC23AEA59154292DCE" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockMember_E7D48801BF96769EBCFBA591542966B9_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember_E7D48801BF96769EBCFBA591542966B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:label id="lab_us-gaap_CommonStockMember_E7D48801BF96769EBCFBA591542966B9_label_en-US" xlink:label="lab_us-gaap_CommonStockMember_E7D48801BF96769EBCFBA591542966B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_E7D48801BF96769EBCFBA591542966B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember_E7D48801BF96769EBCFBA591542966B9" xlink:to="lab_us-gaap_CommonStockMember_E7D48801BF96769EBCFBA591542966B9" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetainedEarningsMember_322C6BC7F89BA03611D9A5915429DC7E_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_322C6BC7F89BA03611D9A5915429DC7E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained Earnings [Member]</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsMember_322C6BC7F89BA03611D9A5915429DC7E_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_322C6BC7F89BA03611D9A5915429DC7E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_322C6BC7F89BA03611D9A5915429DC7E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsMember_322C6BC7F89BA03611D9A5915429DC7E" xlink:to="lab_us-gaap_RetainedEarningsMember_322C6BC7F89BA03611D9A5915429DC7E" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_B0ABE551167B29F7FE9DA591542987D4_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_B0ABE551167B29F7FE9DA591542987D4" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance, value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_B0ABE551167B29F7FE9DA591542987D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_B0ABE551167B29F7FE9DA591542987D4" xlink:to="lab_us-gaap_StockholdersEquity_B0ABE551167B29F7FE9DA591542987D4" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharesIssued_97F05DCEB543BB1DF370A59154295C70_periodStartLabel_en-US" xlink:label="lab_us-gaap_SharesIssued_97F05DCEB543BB1DF370A59154295C70" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance (in shares)</link:label>
    <link:label id="lab_us-gaap_SharesIssued_97F05DCEB543BB1DF370A59154295C70_label_en-US" xlink:label="lab_us-gaap_SharesIssued_97F05DCEB543BB1DF370A59154295C70" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharesIssued" xlink:label="loc_us-gaap_SharesIssued_97F05DCEB543BB1DF370A59154295C70" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesIssued_97F05DCEB543BB1DF370A59154295C70" xlink:to="lab_us-gaap_SharesIssued_97F05DCEB543BB1DF370A59154295C70" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_79D4C934708CBC70DB12A591542929D1_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_79D4C934708CBC70DB12A591542929D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_79D4C934708CBC70DB12A591542929D1_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_79D4C934708CBC70DB12A591542929D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_79D4C934708CBC70DB12A591542929D1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_79D4C934708CBC70DB12A591542929D1" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_79D4C934708CBC70DB12A591542929D1" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_5161CB2C5ACDFF6EC33BA59154299FCD_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_5161CB2C5ACDFF6EC33BA59154299FCD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common stock, net of offering costs, shares</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_5161CB2C5ACDFF6EC33BA59154299FCD_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_5161CB2C5ACDFF6EC33BA59154299FCD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, New Issues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_5161CB2C5ACDFF6EC33BA59154299FCD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_5161CB2C5ACDFF6EC33BA59154299FCD" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesNewIssues_5161CB2C5ACDFF6EC33BA59154299FCD" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_4C28D79841FB3A4CFC43A59154290A4A_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_4C28D79841FB3A4CFC43A59154290A4A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common stock, net of offering costs, value</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_4C28D79841FB3A4CFC43A59154290A4A_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_4C28D79841FB3A4CFC43A59154290A4A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, New Issues</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_4C28D79841FB3A4CFC43A59154290A4A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_4C28D79841FB3A4CFC43A59154290A4A" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueNewIssues_4C28D79841FB3A4CFC43A59154290A4A" xlink:type="arc" />
    <link:label id="lab_colb_StockAdjustmentValueDeferredCompensation_12A683A36EC51CB29DDFA59154295EB7_terseLabel_en-US" xlink:label="lab_colb_StockAdjustmentValueDeferredCompensation_12A683A36EC51CB29DDFA59154295EB7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Adjustment Value Deferred Compensation</link:label>
    <link:label id="lab_colb_StockAdjustmentValueDeferredCompensation_12A683A36EC51CB29DDFA59154295EB7_label_en-US" xlink:label="lab_colb_StockAdjustmentValueDeferredCompensation_12A683A36EC51CB29DDFA59154295EB7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Adjustment Value Deferred Compensation</link:label>
    <link:label id="lab_colb_StockAdjustmentValueDeferredCompensation_12A683A36EC51CB29DDFA59154295EB7_documentation_en-US" xlink:label="lab_colb_StockAdjustmentValueDeferredCompensation_12A683A36EC51CB29DDFA59154295EB7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Activity in deferred compensation plan</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_StockAdjustmentValueDeferredCompensation" xlink:label="loc_colb_StockAdjustmentValueDeferredCompensation_12A683A36EC51CB29DDFA59154295EB7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_StockAdjustmentValueDeferredCompensation_12A683A36EC51CB29DDFA59154295EB7" xlink:to="lab_colb_StockAdjustmentValueDeferredCompensation_12A683A36EC51CB29DDFA59154295EB7" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2F810E85644D81DCCC3DA5915429613A_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2F810E85644D81DCCC3DA5915429613A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common stock - stock option and other plans, shares</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2F810E85644D81DCCC3DA5915429613A_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2F810E85644D81DCCC3DA5915429613A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2F810E85644D81DCCC3DA5915429613A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2F810E85644D81DCCC3DA5915429613A" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2F810E85644D81DCCC3DA5915429613A" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_0A4962D0F0FC100F83B7A591543969EC_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_0A4962D0F0FC100F83B7A591543969EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common stock - stock option and other plans, value</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_0A4962D0F0FC100F83B7A591543969EC_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_0A4962D0F0FC100F83B7A591543969EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Stock Options Exercised</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_0A4962D0F0FC100F83B7A591543969EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_0A4962D0F0FC100F83B7A591543969EC" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_0A4962D0F0FC100F83B7A591543969EC" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_014DBF500413762FAB94A59154396781_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_014DBF500413762FAB94A59154396781" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common stock - restricted stock awards, net of canceled awards, shares</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_014DBF500413762FAB94A59154396781_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_014DBF500413762FAB94A59154396781" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_014DBF500413762FAB94A59154396781" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_014DBF500413762FAB94A59154396781" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_014DBF500413762FAB94A59154396781" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_72B5A8C5266A2F0C6EDBA5915439335E_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_72B5A8C5266A2F0C6EDBA5915439335E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common stock - restricted stock awards, net of canceled awards, value</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_72B5A8C5266A2F0C6EDBA5915439335E_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_72B5A8C5266A2F0C6EDBA5915439335E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_72B5A8C5266A2F0C6EDBA5915439335E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_72B5A8C5266A2F0C6EDBA5915439335E" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_72B5A8C5266A2F0C6EDBA5915439335E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConversionOfStockSharesConverted1_09B2E74E8A6FE6D3CD40A59154397199_terseLabel_en-US" xlink:label="lab_us-gaap_ConversionOfStockSharesConverted1_09B2E74E8A6FE6D3CD40A59154397199" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Conversion of Stock, Shares Converted</link:label>
    <link:label id="lab_us-gaap_ConversionOfStockSharesConverted1_09B2E74E8A6FE6D3CD40A59154397199_label_en-US" xlink:label="lab_us-gaap_ConversionOfStockSharesConverted1_09B2E74E8A6FE6D3CD40A59154397199" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Conversion of Stock, Shares Converted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConversionOfStockSharesConverted1" xlink:label="loc_us-gaap_ConversionOfStockSharesConverted1_09B2E74E8A6FE6D3CD40A59154397199" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConversionOfStockSharesConverted1_09B2E74E8A6FE6D3CD40A59154397199" xlink:to="lab_us-gaap_ConversionOfStockSharesConverted1_09B2E74E8A6FE6D3CD40A59154397199" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConversionOfStockAmountConverted1_B5E9030E19EE6D134A0EA5915439088A_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ConversionOfStockAmountConverted1_B5E9030E19EE6D134A0EA5915439088A" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Conversion of Stock, Amount Converted</link:label>
    <link:label id="lab_us-gaap_ConversionOfStockAmountConverted1_B5E9030E19EE6D134A0EA5915439088A_label_en-US" xlink:label="lab_us-gaap_ConversionOfStockAmountConverted1_B5E9030E19EE6D134A0EA5915439088A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Conversion of Stock, Amount Converted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConversionOfStockAmountConverted1" xlink:label="loc_us-gaap_ConversionOfStockAmountConverted1_B5E9030E19EE6D134A0EA5915439088A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConversionOfStockAmountConverted1_B5E9030E19EE6D134A0EA5915439088A" xlink:to="lab_us-gaap_ConversionOfStockAmountConverted1_B5E9030E19EE6D134A0EA5915439088A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConversionOfStockSharesIssued1_7D55338A706F73FA07C2A5915439B849_terseLabel_en-US" xlink:label="lab_us-gaap_ConversionOfStockSharesIssued1_7D55338A706F73FA07C2A5915439B849" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Conversion of Stock, Shares Issued</link:label>
    <link:label id="lab_us-gaap_ConversionOfStockSharesIssued1_7D55338A706F73FA07C2A5915439B849_label_en-US" xlink:label="lab_us-gaap_ConversionOfStockSharesIssued1_7D55338A706F73FA07C2A5915439B849" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Conversion of Stock, Shares Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConversionOfStockSharesIssued1" xlink:label="loc_us-gaap_ConversionOfStockSharesIssued1_7D55338A706F73FA07C2A5915439B849" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConversionOfStockSharesIssued1_7D55338A706F73FA07C2A5915439B849" xlink:to="lab_us-gaap_ConversionOfStockSharesIssued1_7D55338A706F73FA07C2A5915439B849" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConversionOfStockAmountIssued1_4D9B9E99C8C9F7B6F4DDA5915439D151_terseLabel_en-US" xlink:label="lab_us-gaap_ConversionOfStockAmountIssued1_4D9B9E99C8C9F7B6F4DDA5915439D151" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Conversion of Stock, Amount Issued</link:label>
    <link:label id="lab_us-gaap_ConversionOfStockAmountIssued1_4D9B9E99C8C9F7B6F4DDA5915439D151_label_en-US" xlink:label="lab_us-gaap_ConversionOfStockAmountIssued1_4D9B9E99C8C9F7B6F4DDA5915439D151" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Conversion of Stock, Amount Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConversionOfStockAmountIssued1" xlink:label="loc_us-gaap_ConversionOfStockAmountIssued1_4D9B9E99C8C9F7B6F4DDA5915439D151" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConversionOfStockAmountIssued1_4D9B9E99C8C9F7B6F4DDA5915439D151" xlink:to="lab_us-gaap_ConversionOfStockAmountIssued1_4D9B9E99C8C9F7B6F4DDA5915439D151" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_F2BA21602DBE568BDDFFA59154395840_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_F2BA21602DBE568BDDFFA59154395840" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax benefit deficiency associated with share-based compensation</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_F2BA21602DBE568BDDFFA59154395840_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_F2BA21602DBE568BDDFFA59154395840" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_F2BA21602DBE568BDDFFA59154395840" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_F2BA21602DBE568BDDFFA59154395840" xlink:to="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_F2BA21602DBE568BDDFFA59154395840" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_9A99BA3D01131F9BD114A591543952BC_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_9A99BA3D01131F9BD114A591543952BC" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Purchase and retirement of common stock (in shares)</link:label>
    <link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_9A99BA3D01131F9BD114A591543952BC_label_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_9A99BA3D01131F9BD114A591543952BC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Repurchased and Retired During Period, Shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_9A99BA3D01131F9BD114A591543952BC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_9A99BA3D01131F9BD114A591543952BC" xlink:to="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_9A99BA3D01131F9BD114A591543952BC" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_41166E8FDC583F2C4466A59154396DC2_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_41166E8FDC583F2C4466A59154396DC2" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Purchase and retirement of common stock, value</link:label>
    <link:label id="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_41166E8FDC583F2C4466A59154396DC2_label_en-US" xlink:label="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_41166E8FDC583F2C4466A59154396DC2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Repurchased and Retired During Period, Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_41166E8FDC583F2C4466A59154396DC2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_41166E8FDC583F2C4466A59154396DC2" xlink:to="lab_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_41166E8FDC583F2C4466A59154396DC2" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockRedeemedOrCalledDuringPeriodValue_2623401FBE88076A7A86A59154393F63_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_StockRedeemedOrCalledDuringPeriodValue_2623401FBE88076A7A86A59154393F63" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Stock Redeemed or Called During Period, Value</link:label>
    <link:label id="lab_us-gaap_StockRedeemedOrCalledDuringPeriodValue_2623401FBE88076A7A86A59154393F63_label_en-US" xlink:label="lab_us-gaap_StockRedeemedOrCalledDuringPeriodValue_2623401FBE88076A7A86A59154393F63" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Redeemed or Called During Period, Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockRedeemedOrCalledDuringPeriodValue" xlink:label="loc_us-gaap_StockRedeemedOrCalledDuringPeriodValue_2623401FBE88076A7A86A59154393F63" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockRedeemedOrCalledDuringPeriodValue_2623401FBE88076A7A86A59154393F63" xlink:to="lab_us-gaap_StockRedeemedOrCalledDuringPeriodValue_2623401FBE88076A7A86A59154393F63" xlink:type="arc" />
    <link:label id="lab_us-gaap_DividendsPreferredStockCash_951B00A7A0B0739D1784A5915439A859_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DividendsPreferredStockCash_951B00A7A0B0739D1784A5915439A859" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Dividends, Preferred Stock, Cash</link:label>
    <link:label id="lab_us-gaap_DividendsPreferredStockCash_951B00A7A0B0739D1784A5915439A859_label_en-US" xlink:label="lab_us-gaap_DividendsPreferredStockCash_951B00A7A0B0739D1784A5915439A859" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends, Preferred Stock, Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:label="loc_us-gaap_DividendsPreferredStockCash_951B00A7A0B0739D1784A5915439A859" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPreferredStockCash_951B00A7A0B0739D1784A5915439A859" xlink:to="lab_us-gaap_DividendsPreferredStockCash_951B00A7A0B0739D1784A5915439A859" xlink:type="arc" />
    <link:label id="lab_us-gaap_DividendsCommonStockCash_185E583221C3AECDF995A59154392C90_negatedLabel_en-US" xlink:label="lab_us-gaap_DividendsCommonStockCash_185E583221C3AECDF995A59154392C90" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Cash dividends paid on common stock</link:label>
    <link:label id="lab_us-gaap_DividendsCommonStockCash_185E583221C3AECDF995A59154392C90_label_en-US" xlink:label="lab_us-gaap_DividendsCommonStockCash_185E583221C3AECDF995A59154392C90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends, Common Stock, Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="loc_us-gaap_DividendsCommonStockCash_185E583221C3AECDF995A59154392C90" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsCommonStockCash_185E583221C3AECDF995A59154392C90" xlink:to="lab_us-gaap_DividendsCommonStockCash_185E583221C3AECDF995A59154392C90" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_BD9EA60BC065C6B38AAFA5915439AE72_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_BD9EA60BC065C6B38AAFA5915439AE72" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance, value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_BD9EA60BC065C6B38AAFA5915439AE72" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_BD9EA60BC065C6B38AAFA5915439AE72" xlink:to="lab_us-gaap_StockholdersEquity_BD9EA60BC065C6B38AAFA5915439AE72" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharesIssued_B95351E6A0E47E14DCEDA59154393864_periodEndLabel_en-US" xlink:label="lab_us-gaap_SharesIssued_B95351E6A0E47E14DCEDA59154393864" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance (in shares)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharesIssued" xlink:label="loc_us-gaap_SharesIssued_B95351E6A0E47E14DCEDA59154393864" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesIssued_B95351E6A0E47E14DCEDA59154393864" xlink:to="lab_us-gaap_SharesIssued_B95351E6A0E47E14DCEDA59154393864" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockDividendsPerShareCashPaid_384C940F357FFE6DDD5CA59154391B70_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockDividendsPerShareCashPaid_384C940F357FFE6DDD5CA59154391B70" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Dividends, Per Share, Cash Paid</link:label>
    <link:label id="lab_us-gaap_PreferredStockDividendsPerShareCashPaid_384C940F357FFE6DDD5CA59154391B70_label_en-US" xlink:label="lab_us-gaap_PreferredStockDividendsPerShareCashPaid_384C940F357FFE6DDD5CA59154391B70" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Dividends, Per Share, Cash Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockDividendsPerShareCashPaid" xlink:label="loc_us-gaap_PreferredStockDividendsPerShareCashPaid_384C940F357FFE6DDD5CA59154391B70" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockDividendsPerShareCashPaid_384C940F357FFE6DDD5CA59154391B70" xlink:to="lab_us-gaap_PreferredStockDividendsPerShareCashPaid_384C940F357FFE6DDD5CA59154391B70" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareCashPaid_228DDE53F7EC734061E5A59154397E8B_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareCashPaid_228DDE53F7EC734061E5A59154397E8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Stock, Dividends, Per Share, Cash Paid</link:label>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareCashPaid_228DDE53F7EC734061E5A59154397E8B_label_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareCashPaid_228DDE53F7EC734061E5A59154397E8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Dividends, Per Share, Cash Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid" xlink:label="loc_us-gaap_CommonStockDividendsPerShareCashPaid_228DDE53F7EC734061E5A59154397E8B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockDividendsPerShareCashPaid_228DDE53F7EC734061E5A59154397E8B" xlink:to="lab_us-gaap_CommonStockDividendsPerShareCashPaid_228DDE53F7EC734061E5A59154397E8B" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_35D3F3812C6FECF2B9E00803C0099D54_label_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract_35D3F3812C6FECF2B9E00803C0099D54" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Cash Flows [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_35D3F3812C6FECF2B9E00803C0099D54" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_35D3F3812C6FECF2B9E00803C0099D54" xlink:to="lab_us-gaap_StatementOfCashFlowsAbstract_35D3F3812C6FECF2B9E00803C0099D54" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_44437F7294717436F0ED0803C009844B_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_44437F7294717436F0ED0803C009844B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash Flows From Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_44437F7294717436F0ED0803C009844B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_44437F7294717436F0ED0803C009844B" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_44437F7294717436F0ED0803C009844B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepreciationAmortizationAndAccretionNet_CF2CBE32CC916A51FE3D0803C009541F_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationAmortizationAndAccretionNet_CF2CBE32CC916A51FE3D0803C009541F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation, amortization and accretion</link:label>
    <link:label id="lab_us-gaap_DepreciationAmortizationAndAccretionNet_CF2CBE32CC916A51FE3D0803C009541F_label_en-US" xlink:label="lab_us-gaap_DepreciationAmortizationAndAccretionNet_CF2CBE32CC916A51FE3D0803C009541F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation, Amortization and Accretion, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationAmortizationAndAccretionNet" xlink:label="loc_us-gaap_DepreciationAmortizationAndAccretionNet_CF2CBE32CC916A51FE3D0803C009541F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationAmortizationAndAccretionNet_CF2CBE32CC916A51FE3D0803C009541F" xlink:to="lab_us-gaap_DepreciationAmortizationAndAccretionNet_CF2CBE32CC916A51FE3D0803C009541F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_12AF266894683A03D5BE0803C009DBED_negatedLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_12AF266894683A03D5BE0803C009DBED" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Investment securities loss (gain), net</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_12AF266894683A03D5BE0803C009DBED_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_12AF266894683A03D5BE0803C009DBED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Gross Realized Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_12AF266894683A03D5BE0803C009DBED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_12AF266894683A03D5BE0803C009DBED" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_12AF266894683A03D5BE0803C009DBED" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnSaleOfOtherAssets_5C96959421F3558A88E20803C009119B_negatedLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfOtherAssets_5C96959421F3558A88E20803C009119B" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net realized loss (gain) on sale of premises and equipment and loans held for investment</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfOtherAssets_5C96959421F3558A88E20803C009119B_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfOtherAssets_5C96959421F3558A88E20803C009119B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Disposition of Other Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfOtherAssets" xlink:label="loc_us-gaap_GainLossOnSaleOfOtherAssets_5C96959421F3558A88E20803C009119B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfOtherAssets_5C96959421F3558A88E20803C009119B" xlink:to="lab_us-gaap_GainLossOnSaleOfOtherAssets_5C96959421F3558A88E20803C009119B" xlink:type="arc" />
    <link:label id="lab_colb_NetgainonsaleandvaluationadjustmentsofOREO_CD038A5490E483CEBF690803C0090956_terseLabel_en-US" xlink:label="lab_colb_NetgainonsaleandvaluationadjustmentsofOREO_CD038A5490E483CEBF690803C0090956" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net gain on sale and valuation adjustments of OREO</link:label>
    <link:label id="lab_colb_NetgainonsaleandvaluationadjustmentsofOREO_CD038A5490E483CEBF690803C0090956_label_en-US" xlink:label="lab_colb_NetgainonsaleandvaluationadjustmentsofOREO_CD038A5490E483CEBF690803C0090956" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net gain on sale and valuation adjustments of OREO</link:label>
    <link:label id="lab_colb_NetgainonsaleandvaluationadjustmentsofOREO_CD038A5490E483CEBF690803C0090956_documentation_en-US" xlink:label="lab_colb_NetgainonsaleandvaluationadjustmentsofOREO_CD038A5490E483CEBF690803C0090956" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net gain on sale and valuation adjustments of OREO</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_NetgainonsaleandvaluationadjustmentsofOREO" xlink:label="loc_colb_NetgainonsaleandvaluationadjustmentsofOREO_CD038A5490E483CEBF690803C0090956" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_NetgainonsaleandvaluationadjustmentsofOREO_CD038A5490E483CEBF690803C0090956" xlink:to="lab_colb_NetgainonsaleandvaluationadjustmentsofOREO_CD038A5490E483CEBF690803C0090956" xlink:type="arc" />
    <link:label id="lab_colb_Gainonsaleofmerchantcardservicesportfolio_333058B9D0712B21B5C30803C01924FB_negatedTerseLabel_en-US" xlink:label="lab_colb_Gainonsaleofmerchantcardservicesportfolio_333058B9D0712B21B5C30803C01924FB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gain on sale of merchant card services portfolio</link:label>
    <link:label id="lab_colb_Gainonsaleofmerchantcardservicesportfolio_333058B9D0712B21B5C30803C01924FB_label_en-US" xlink:label="lab_colb_Gainonsaleofmerchantcardservicesportfolio_333058B9D0712B21B5C30803C01924FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain on sale of merchant card services portfolio</link:label>
    <link:label id="lab_colb_Gainonsaleofmerchantcardservicesportfolio_333058B9D0712B21B5C30803C01924FB_documentation_en-US" xlink:label="lab_colb_Gainonsaleofmerchantcardservicesportfolio_333058B9D0712B21B5C30803C01924FB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gain on sale of merchant card services portfolio</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Gainonsaleofmerchantcardservicesportfolio" xlink:label="loc_colb_Gainonsaleofmerchantcardservicesportfolio_333058B9D0712B21B5C30803C01924FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Gainonsaleofmerchantcardservicesportfolio_333058B9D0712B21B5C30803C01924FB" xlink:to="lab_colb_Gainonsaleofmerchantcardservicesportfolio_333058B9D0712B21B5C30803C01924FB" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnSaleOfInsuranceBlock_3E005FCC56A42DEF3F150803C019B72E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfInsuranceBlock_3E005FCC56A42DEF3F150803C019B72E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Sale of Insurance Block</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfInsuranceBlock_3E005FCC56A42DEF3F150803C019B72E_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfInsuranceBlock_3E005FCC56A42DEF3F150803C019B72E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Sale of Insurance Block</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfInsuranceBlock" xlink:label="loc_us-gaap_GainLossOnSaleOfInsuranceBlock_3E005FCC56A42DEF3F150803C019B72E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfInsuranceBlock_3E005FCC56A42DEF3F150803C019B72E" xlink:to="lab_us-gaap_GainLossOnSaleOfInsuranceBlock_3E005FCC56A42DEF3F150803C019B72E" xlink:type="arc" />
    <link:label id="lab_colb_FDIClosssharingagreementearlyterminationpretaxcharge_0BE78208783D6134E0DF0803C0199E29_terseLabel_en-US" xlink:label="lab_colb_FDIClosssharingagreementearlyterminationpretaxcharge_0BE78208783D6134E0DF0803C0199E29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FDIC loss-sharing agreement early termination, pretax charge</link:label>
    <link:label id="lab_colb_FDIClosssharingagreementearlyterminationpretaxcharge_0BE78208783D6134E0DF0803C0199E29_label_en-US" xlink:label="lab_colb_FDIClosssharingagreementearlyterminationpretaxcharge_0BE78208783D6134E0DF0803C0199E29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">FDIC loss-sharing agreement early termination, pretax charge</link:label>
    <link:label id="lab_colb_FDIClosssharingagreementearlyterminationpretaxcharge_0BE78208783D6134E0DF0803C0199E29_documentation_en-US" xlink:label="lab_colb_FDIClosssharingagreementearlyterminationpretaxcharge_0BE78208783D6134E0DF0803C0199E29" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">FDIC loss-sharing agreement early termination, pretax charge</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FDIClosssharingagreementearlyterminationpretaxcharge" xlink:label="loc_colb_FDIClosssharingagreementearlyterminationpretaxcharge_0BE78208783D6134E0DF0803C0199E29" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FDIClosssharingagreementearlyterminationpretaxcharge_0BE78208783D6134E0DF0803C0199E29" xlink:to="lab_colb_FDIClosssharingagreementearlyterminationpretaxcharge_0BE78208783D6134E0DF0803C0199E29" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_860EA278AD893604D2790803C019A5BB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_860EA278AD893604D2790803C019A5BB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Originations of loans held for sale</link:label>
    <link:label id="lab_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_860EA278AD893604D2790803C019A5BB_label_en-US" xlink:label="lab_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_860EA278AD893604D2790803C019A5BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Origination and Purchases of Loans Held-for-sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale" xlink:label="loc_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_860EA278AD893604D2790803C019A5BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_860EA278AD893604D2790803C019A5BB" xlink:to="lab_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_860EA278AD893604D2790803C019A5BB" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfLoansHeldForSale_3C99ACD60227385770480803C019E5EB_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfLoansHeldForSale_3C99ACD60227385770480803C019E5EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Loans Held-for-sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfLoansHeldForSale_3C99ACD60227385770480803C019E5EB_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfLoansHeldForSale_3C99ACD60227385770480803C019E5EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Loans Held-for-sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfLoansHeldForSale" xlink:label="loc_us-gaap_ProceedsFromSaleOfLoansHeldForSale_3C99ACD60227385770480803C019E5EB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfLoansHeldForSale_3C99ACD60227385770480803C019E5EB" xlink:to="lab_us-gaap_ProceedsFromSaleOfLoansHeldForSale_3C99ACD60227385770480803C019E5EB" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_E32F004ABDB7696A57710803C0195617_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_E32F004ABDB7696A57710803C0195617" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred income tax expense (benefit)</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_E32F004ABDB7696A57710803C0195617_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_E32F004ABDB7696A57710803C0195617" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_E32F004ABDB7696A57710803C0195617" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_E32F004ABDB7696A57710803C0195617" xlink:to="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_E32F004ABDB7696A57710803C0195617" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3B70CA143AF754C509240803C0196F72_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3B70CA143AF754C509240803C0196F72" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in:</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3B70CA143AF754C509240803C0196F72_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3B70CA143AF754C509240803C0196F72" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Operating Capital [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3B70CA143AF754C509240803C0196F72" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3B70CA143AF754C509240803C0196F72" xlink:to="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_3B70CA143AF754C509240803C0196F72" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_D14C15E88DAF247F99950803C019901F_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_D14C15E88DAF247F99950803C019901F" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Interest receivable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_D14C15E88DAF247F99950803C019901F_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_D14C15E88DAF247F99950803C019901F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Interest and Dividends Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_D14C15E88DAF247F99950803C019901F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_D14C15E88DAF247F99950803C019901F" xlink:to="lab_us-gaap_IncreaseDecreaseInInterestAndDividendsReceivable_D14C15E88DAF247F99950803C019901F" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInInterestPayableNet_05D80D9D038536F0CE810803C019E59F_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInterestPayableNet_05D80D9D038536F0CE810803C019E59F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest payable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInInterestPayableNet_05D80D9D038536F0CE810803C019E59F_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInInterestPayableNet_05D80D9D038536F0CE810803C019E59F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Interest Payable, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_05D80D9D038536F0CE810803C019E59F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_05D80D9D038536F0CE810803C019E59F" xlink:to="lab_us-gaap_IncreaseDecreaseInInterestPayableNet_05D80D9D038536F0CE810803C019E59F" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_8B90505BE066167001FC0803C0194432_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_8B90505BE066167001FC0803C0194432" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_8B90505BE066167001FC0803C0194432_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_8B90505BE066167001FC0803C0194432" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Operating Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_8B90505BE066167001FC0803C0194432" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_8B90505BE066167001FC0803C0194432" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_8B90505BE066167001FC0803C0194432" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_14A7267D4DAD0DD8A18C0803C0192549_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_14A7267D4DAD0DD8A18C0803C0192549" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_14A7267D4DAD0DD8A18C0803C0192549_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_14A7267D4DAD0DD8A18C0803C0192549" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Operating Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_14A7267D4DAD0DD8A18C0803C0192549" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_14A7267D4DAD0DD8A18C0803C0192549" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_14A7267D4DAD0DD8A18C0803C0192549" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_BE216448248480408AE60803C01917F1_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_BE216448248480408AE60803C01917F1" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by operating activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_BE216448248480408AE60803C01917F1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_BE216448248480408AE60803C01917F1" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_BE216448248480408AE60803C01917F1" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_27234DBEDC65DA80A2EC0803C0192E04_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_27234DBEDC65DA80A2EC0803C0192E04" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash Flows From Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_27234DBEDC65DA80A2EC0803C0192E04" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_27234DBEDC65DA80A2EC0803C0192E04" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_27234DBEDC65DA80A2EC0803C0192E04" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForProceedsFromLoansAndLeases_2F80EBD7CC000E2E5A710803C0192D11_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromLoansAndLeases_2F80EBD7CC000E2E5A710803C0192D11" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Loans and Leases</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromLoansAndLeases_2F80EBD7CC000E2E5A710803C0192D11_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromLoansAndLeases_2F80EBD7CC000E2E5A710803C0192D11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Loans and Leases</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromLoansAndLeases" xlink:label="loc_us-gaap_PaymentsForProceedsFromLoansAndLeases_2F80EBD7CC000E2E5A710803C0192D11" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromLoansAndLeases_2F80EBD7CC000E2E5A710803C0192D11" xlink:to="lab_us-gaap_PaymentsForProceedsFromLoansAndLeases_2F80EBD7CC000E2E5A710803C0192D11" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_5BDB25F05B3A794A5B500803C019EB60_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_5BDB25F05B3A794A5B500803C019EB60" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchases of securities available for sale</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_5BDB25F05B3A794A5B500803C019EB60_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_5BDB25F05B3A794A5B500803C019EB60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Available-for-sale Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecurities" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_5BDB25F05B3A794A5B500803C019EB60" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_5BDB25F05B3A794A5B500803C019EB60" xlink:to="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecurities_5BDB25F05B3A794A5B500803C019EB60" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireLoansHeldForInvestment_4FE9C821E21F99D07EA30803C01909E2_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireLoansHeldForInvestment_4FE9C821E21F99D07EA30803C01909E2" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payments to Acquire Loans Held-for-investment</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireLoansHeldForInvestment_4FE9C821E21F99D07EA30803C01909E2_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireLoansHeldForInvestment_4FE9C821E21F99D07EA30803C01909E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Loans Held-for-investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireLoansHeldForInvestment" xlink:label="loc_us-gaap_PaymentsToAcquireLoansHeldForInvestment_4FE9C821E21F99D07EA30803C01909E2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireLoansHeldForInvestment_4FE9C821E21F99D07EA30803C01909E2" xlink:to="lab_us-gaap_PaymentsToAcquireLoansHeldForInvestment_4FE9C821E21F99D07EA30803C01909E2" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_54328D19CAF84E9D3E5A0803C0192081_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_54328D19CAF84E9D3E5A0803C0192081" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchases of premises and equipment</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_54328D19CAF84E9D3E5A0803C0192081_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_54328D19CAF84E9D3E5A0803C0192081" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_54328D19CAF84E9D3E5A0803C0192081" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_54328D19CAF84E9D3E5A0803C0192081" xlink:to="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_54328D19CAF84E9D3E5A0803C0192081" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_B3D064012636DED86B320803C0199062_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_B3D064012636DED86B320803C0199062" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payments to Acquire Federal Home Loan Bank Stock</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_B3D064012636DED86B320803C0199062_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_B3D064012636DED86B320803C0199062" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Federal Home Loan Bank Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireFederalHomeLoanBankStock" xlink:label="loc_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_B3D064012636DED86B320803C0199062" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_B3D064012636DED86B320803C0199062" xlink:to="lab_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_B3D064012636DED86B320803C0199062" xlink:type="arc" />
    <link:label id="lab_colb_ProceedsfromFDICforreimbursementonlosssharingasset_2D334C7F5DA1E35BD2300803C0191E9C_terseLabel_en-US" xlink:label="lab_colb_ProceedsfromFDICforreimbursementonlosssharingasset_2D334C7F5DA1E35BD2300803C0191E9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from FDIC for reimbursement on loss-sharing asset</link:label>
    <link:label id="lab_colb_ProceedsfromFDICforreimbursementonlosssharingasset_2D334C7F5DA1E35BD2300803C0191E9C_label_en-US" xlink:label="lab_colb_ProceedsfromFDICforreimbursementonlosssharingasset_2D334C7F5DA1E35BD2300803C0191E9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from FDIC for reimbursement on loss-sharing asset</link:label>
    <link:label id="lab_colb_ProceedsfromFDICforreimbursementonlosssharingasset_2D334C7F5DA1E35BD2300803C0191E9C_documentation_en-US" xlink:label="lab_colb_ProceedsfromFDICforreimbursementonlosssharingasset_2D334C7F5DA1E35BD2300803C0191E9C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proceeds from FDIC for reimbursement on loss-sharing asset</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ProceedsfromFDICforreimbursementonlosssharingasset" xlink:label="loc_colb_ProceedsfromFDICforreimbursementonlosssharingasset_2D334C7F5DA1E35BD2300803C0191E9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ProceedsfromFDICforreimbursementonlosssharingasset_2D334C7F5DA1E35BD2300803C0191E9C" xlink:to="lab_colb_ProceedsfromFDICforreimbursementonlosssharingasset_2D334C7F5DA1E35BD2300803C0191E9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_15EB47DC87113A02FA6B0803C019714A_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_15EB47DC87113A02FA6B0803C019714A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sales of securities available for sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_15EB47DC87113A02FA6B0803C019714A_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_15EB47DC87113A02FA6B0803C019714A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale and Maturity of Debt Securities, Available-for-sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_15EB47DC87113A02FA6B0803C019714A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_15EB47DC87113A02FA6B0803C019714A" xlink:to="lab_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_15EB47DC87113A02FA6B0803C019714A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_F31109C1E657B11093860803C019E9C3_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_F31109C1E657B11093860803C019E9C3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Available-for-sale Securities, Equity</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_F31109C1E657B11093860803C019E9C3_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_F31109C1E657B11093860803C019E9C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Available-for-sale Securities, Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_F31109C1E657B11093860803C019E9C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_F31109C1E657B11093860803C019E9C3" xlink:to="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesEquity_F31109C1E657B11093860803C019E9C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_5FDE02E7471044E7180D0803C0192C40_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_5FDE02E7471044E7180D0803C0192C40" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from principal repayments and maturities of securities available for sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_5FDE02E7471044E7180D0803C0192C40_label_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_5FDE02E7471044E7180D0803C0192C40" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_5FDE02E7471044E7180D0803C0192C40" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_5FDE02E7471044E7180D0803C0192C40" xlink:to="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_5FDE02E7471044E7180D0803C0192C40" xlink:type="arc" />
    <link:label id="lab_colb_ProceedsFromSalesOfLoansHeldForInvestmentAndOtherAssets_9B756FD82CB64311C55E0803C0198914_terseLabel_en-US" xlink:label="lab_colb_ProceedsFromSalesOfLoansHeldForInvestmentAndOtherAssets_9B756FD82CB64311C55E0803C0198914" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sales of loans held for investment and other assets</link:label>
    <link:label id="lab_colb_ProceedsFromSalesOfLoansHeldForInvestmentAndOtherAssets_9B756FD82CB64311C55E0803C0198914_label_en-US" xlink:label="lab_colb_ProceedsFromSalesOfLoansHeldForInvestmentAndOtherAssets_9B756FD82CB64311C55E0803C0198914" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">proceeds from sales of loans held for investment and other assets</link:label>
    <link:label id="lab_colb_ProceedsFromSalesOfLoansHeldForInvestmentAndOtherAssets_9B756FD82CB64311C55E0803C0198914_documentation_en-US" xlink:label="lab_colb_ProceedsFromSalesOfLoansHeldForInvestmentAndOtherAssets_9B756FD82CB64311C55E0803C0198914" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">proceeds from sales of loans held for investment and other assets</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ProceedsFromSalesOfLoansHeldForInvestmentAndOtherAssets" xlink:label="loc_colb_ProceedsFromSalesOfLoansHeldForInvestmentAndOtherAssets_9B756FD82CB64311C55E0803C0198914" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ProceedsFromSalesOfLoansHeldForInvestmentAndOtherAssets_9B756FD82CB64311C55E0803C0198914" xlink:to="lab_colb_ProceedsFromSalesOfLoansHeldForInvestmentAndOtherAssets_9B756FD82CB64311C55E0803C0198914" xlink:type="arc" />
    <link:label id="lab_colb_Proceedsfromsaleofmerchantcardservicesportfolio_D4A11F89978C5422D45B0803C0194B2C_terseLabel_en-US" xlink:label="lab_colb_Proceedsfromsaleofmerchantcardservicesportfolio_D4A11F89978C5422D45B0803C0194B2C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of merchant card services portfolio</link:label>
    <link:label id="lab_colb_Proceedsfromsaleofmerchantcardservicesportfolio_D4A11F89978C5422D45B0803C0194B2C_label_en-US" xlink:label="lab_colb_Proceedsfromsaleofmerchantcardservicesportfolio_D4A11F89978C5422D45B0803C0194B2C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from sale of merchant card services portfolio</link:label>
    <link:label id="lab_colb_Proceedsfromsaleofmerchantcardservicesportfolio_D4A11F89978C5422D45B0803C0194B2C_documentation_en-US" xlink:label="lab_colb_Proceedsfromsaleofmerchantcardservicesportfolio_D4A11F89978C5422D45B0803C0194B2C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Proceeds from sale of merchant card services portfolio</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Proceedsfromsaleofmerchantcardservicesportfolio" xlink:label="loc_colb_Proceedsfromsaleofmerchantcardservicesportfolio_D4A11F89978C5422D45B0803C0194B2C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Proceedsfromsaleofmerchantcardservicesportfolio_D4A11F89978C5422D45B0803C0194B2C" xlink:to="lab_colb_Proceedsfromsaleofmerchantcardservicesportfolio_D4A11F89978C5422D45B0803C0194B2C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_0B6A309AC9C67702FC3C0803C019D468_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_0B6A309AC9C67702FC3C0803C019D468" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Federal Home Loan Bank Stock</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_0B6A309AC9C67702FC3C0803C019D468_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_0B6A309AC9C67702FC3C0803C019D468" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Federal Home Loan Bank Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock" xlink:label="loc_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_0B6A309AC9C67702FC3C0803C019D468" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_0B6A309AC9C67702FC3C0803C019D468" xlink:to="lab_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_0B6A309AC9C67702FC3C0803C019D468" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfForeclosedAssets_03CC6C1FD797349F34FE0803C0191471_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfForeclosedAssets_03CC6C1FD797349F34FE0803C0191471" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sales of other real estate and other personal property owned</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfForeclosedAssets_03CC6C1FD797349F34FE0803C0191471_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfForeclosedAssets_03CC6C1FD797349F34FE0803C0191471" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Foreclosed Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfForeclosedAssets" xlink:label="loc_us-gaap_ProceedsFromSaleOfForeclosedAssets_03CC6C1FD797349F34FE0803C0191471" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfForeclosedAssets_03CC6C1FD797349F34FE0803C0191471" xlink:to="lab_us-gaap_ProceedsFromSaleOfForeclosedAssets_03CC6C1FD797349F34FE0803C0191471" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromLifeInsurancePolicies_C93550C4873C9BE1A6440803C019B245_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromLifeInsurancePolicies_C93550C4873C9BE1A6440803C019B245" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Life Insurance Policy</link:label>
    <link:label id="lab_us-gaap_ProceedsFromLifeInsurancePolicies_C93550C4873C9BE1A6440803C019B245_label_en-US" xlink:label="lab_us-gaap_ProceedsFromLifeInsurancePolicies_C93550C4873C9BE1A6440803C019B245" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Life Insurance Policy</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromLifeInsurancePolicies" xlink:label="loc_us-gaap_ProceedsFromLifeInsurancePolicies_C93550C4873C9BE1A6440803C019B245" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromLifeInsurancePolicies_C93550C4873C9BE1A6440803C019B245" xlink:to="lab_us-gaap_ProceedsFromLifeInsurancePolicies_C93550C4873C9BE1A6440803C019B245" xlink:type="arc" />
    <link:label id="lab_colb_PaymentfromtoFDICtoterminatelosssharingagreements_678209D5458D1A8E6B140803C019CEE5_terseLabel_en-US" xlink:label="lab_colb_PaymentfromtoFDICtoterminatelosssharingagreements_678209D5458D1A8E6B140803C019CEE5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payment from (to) FDIC to terminate loss-sharing agreements</link:label>
    <link:label id="lab_colb_PaymentfromtoFDICtoterminatelosssharingagreements_678209D5458D1A8E6B140803C019CEE5_label_en-US" xlink:label="lab_colb_PaymentfromtoFDICtoterminatelosssharingagreements_678209D5458D1A8E6B140803C019CEE5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment from (to) FDIC to terminate loss-sharing agreements</link:label>
    <link:label id="lab_colb_PaymentfromtoFDICtoterminatelosssharingagreements_678209D5458D1A8E6B140803C019CEE5_documentation_en-US" xlink:label="lab_colb_PaymentfromtoFDICtoterminatelosssharingagreements_678209D5458D1A8E6B140803C019CEE5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payment from (to) FDIC to terminate loss-sharing agreements</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_PaymentfromtoFDICtoterminatelosssharingagreements" xlink:label="loc_colb_PaymentfromtoFDICtoterminatelosssharingagreements_678209D5458D1A8E6B140803C019CEE5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_PaymentfromtoFDICtoterminatelosssharingagreements_678209D5458D1A8E6B140803C019CEE5" xlink:to="lab_colb_PaymentfromtoFDICtoterminatelosssharingagreements_678209D5458D1A8E6B140803C019CEE5" xlink:type="arc" />
    <link:label id="lab_colb_PaymenttoFDICRelatedtoLossSharingAsset_88C39F8F9EC038ED8E9A0803C019E597_negatedTerseLabel_en-US" xlink:label="lab_colb_PaymenttoFDICRelatedtoLossSharingAsset_88C39F8F9EC038ED8E9A0803C019E597" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payment to FDIC Related to Loss-Sharing Asset</link:label>
    <link:label id="lab_colb_PaymenttoFDICRelatedtoLossSharingAsset_88C39F8F9EC038ED8E9A0803C019E597_label_en-US" xlink:label="lab_colb_PaymenttoFDICRelatedtoLossSharingAsset_88C39F8F9EC038ED8E9A0803C019E597" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment to FDIC Related to Loss-Sharing Asset</link:label>
    <link:label id="lab_colb_PaymenttoFDICRelatedtoLossSharingAsset_88C39F8F9EC038ED8E9A0803C019E597_documentation_en-US" xlink:label="lab_colb_PaymenttoFDICRelatedtoLossSharingAsset_88C39F8F9EC038ED8E9A0803C019E597" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Payment to FDIC Related to Loss-Sharing Asset</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_PaymenttoFDICRelatedtoLossSharingAsset" xlink:label="loc_colb_PaymenttoFDICRelatedtoLossSharingAsset_88C39F8F9EC038ED8E9A0803C019E597" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_PaymenttoFDICRelatedtoLossSharingAsset_88C39F8F9EC038ED8E9A0803C019E597" xlink:to="lab_colb_PaymenttoFDICRelatedtoLossSharingAsset_88C39F8F9EC038ED8E9A0803C019E597" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_6ABBDFBA38D8887D31F70803C0190519_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_6ABBDFBA38D8887D31F70803C0190519" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in investing activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_6ABBDFBA38D8887D31F70803C0190519" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_6ABBDFBA38D8887D31F70803C0190519" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_6ABBDFBA38D8887D31F70803C0190519" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_8D800F00866C20FF825C0803C019E048_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_8D800F00866C20FF825C0803C019E048" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash Flows From Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_8D800F00866C20FF825C0803C019E048" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_8D800F00866C20FF825C0803C019E048" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_8D800F00866C20FF825C0803C019E048" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInDeposits_739EA017522CC4BA3DBD0803C019FB21_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDeposits_739EA017522CC4BA3DBD0803C019FB21" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net increase (decrease) in deposits</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInDeposits_739EA017522CC4BA3DBD0803C019FB21_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDeposits_739EA017522CC4BA3DBD0803C019FB21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInDeposits" xlink:label="loc_us-gaap_IncreaseDecreaseInDeposits_739EA017522CC4BA3DBD0803C019FB21" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInDeposits_739EA017522CC4BA3DBD0803C019FB21" xlink:to="lab_us-gaap_IncreaseDecreaseInDeposits_739EA017522CC4BA3DBD0803C019FB21" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet_BFE925EEDC307C62C1020803C019029F_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet_BFE925EEDC307C62C1020803C019029F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net increase (decrease) in sweep repurchase agreements</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet_BFE925EEDC307C62C1020803C019029F_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet_BFE925EEDC307C62C1020803C019029F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Federal Funds Purchased and Securities Sold under Agreements to Repurchase, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet" xlink:label="loc_us-gaap_IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet_BFE925EEDC307C62C1020803C019029F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet_BFE925EEDC307C62C1020803C019029F" xlink:to="lab_us-gaap_IncreaseDecreaseInFederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchaseNet_BFE925EEDC307C62C1020803C019029F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromFederalHomeLoanBankAdvances_6431BEAF95797B6E72160803C0191263_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromFederalHomeLoanBankAdvances_6431BEAF95797B6E72160803C0191263" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Federal Home Loan Bank advances</link:label>
    <link:label id="lab_us-gaap_ProceedsFromFederalHomeLoanBankAdvances_6431BEAF95797B6E72160803C0191263_label_en-US" xlink:label="lab_us-gaap_ProceedsFromFederalHomeLoanBankAdvances_6431BEAF95797B6E72160803C0191263" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from FHLBank Advance, Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromFederalHomeLoanBankAdvances" xlink:label="loc_us-gaap_ProceedsFromFederalHomeLoanBankAdvances_6431BEAF95797B6E72160803C0191263" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromFederalHomeLoanBankAdvances_6431BEAF95797B6E72160803C0191263" xlink:to="lab_us-gaap_ProceedsFromFederalHomeLoanBankAdvances_6431BEAF95797B6E72160803C0191263" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_841A55856D3C39EDEDD20803C01942AA_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_841A55856D3C39EDEDD20803C01942AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from Federal Reserve Bank borrowings</link:label>
    <link:label id="lab_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_841A55856D3C39EDEDD20803C01942AA_label_en-US" xlink:label="lab_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_841A55856D3C39EDEDD20803C01942AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from FHLBank Borrowings, Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromFederalHomeLoanBankBorrowings" xlink:label="loc_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_841A55856D3C39EDEDD20803C01942AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_841A55856D3C39EDEDD20803C01942AA" xlink:to="lab_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_841A55856D3C39EDEDD20803C01942AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForFederalHomeLoanBankAdvances_D249E113592BEBBB1C5A0803C019F0EB_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForFederalHomeLoanBankAdvances_D249E113592BEBBB1C5A0803C019F0EB" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Repayment of Federal Home Loan Bank advances</link:label>
    <link:label id="lab_us-gaap_PaymentsForFederalHomeLoanBankAdvances_D249E113592BEBBB1C5A0803C019F0EB_label_en-US" xlink:label="lab_us-gaap_PaymentsForFederalHomeLoanBankAdvances_D249E113592BEBBB1C5A0803C019F0EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for FHLBank Advance, Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForFederalHomeLoanBankAdvances" xlink:label="loc_us-gaap_PaymentsForFederalHomeLoanBankAdvances_D249E113592BEBBB1C5A0803C019F0EB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForFederalHomeLoanBankAdvances_D249E113592BEBBB1C5A0803C019F0EB" xlink:to="lab_us-gaap_PaymentsForFederalHomeLoanBankAdvances_D249E113592BEBBB1C5A0803C019F0EB" xlink:type="arc" />
    <link:label id="lab_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_5AA75901F59C5518FF680803C0197739_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_5AA75901F59C5518FF680803C0197739" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Repayment of Federal Reserve Bank borrowings</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_5AA75901F59C5518FF680803C0197739_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_5AA75901F59C5518FF680803C0197739" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of FHLBank Borrowings, Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings" xlink:label="loc_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_5AA75901F59C5518FF680803C0197739" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_5AA75901F59C5518FF680803C0197739" xlink:to="lab_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_5AA75901F59C5518FF680803C0197739" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_73922E6FD54191BB6AA60803C0193214_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_73922E6FD54191BB6AA60803C0193214" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Payment of preferred stock dividends</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:label="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_73922E6FD54191BB6AA60803C0193214" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_73922E6FD54191BB6AA60803C0193214" xlink:to="lab_us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_73922E6FD54191BB6AA60803C0193214" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_3D101B366923113613FE0803C0192199_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_3D101B366923113613FE0803C0192199" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Payment of common stock dividends</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_3D101B366923113613FE0803C0192199" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividendsCommonStock_3D101B366923113613FE0803C0192199" xlink:to="lab_us-gaap_PaymentsOfDividendsCommonStock_3D101B366923113613FE0803C0192199" xlink:type="arc" />
    <link:label id="lab_colb_Repaymentoftermrepurchaseagreement_A9586A52AFD1F43EE9120803C0196AEF_negatedTerseLabel_en-US" xlink:label="lab_colb_Repaymentoftermrepurchaseagreement_A9586A52AFD1F43EE9120803C0196AEF" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayment of term repurchase agreement</link:label>
    <link:label id="lab_colb_Repaymentoftermrepurchaseagreement_A9586A52AFD1F43EE9120803C0196AEF_label_en-US" xlink:label="lab_colb_Repaymentoftermrepurchaseagreement_A9586A52AFD1F43EE9120803C0196AEF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayment of term repurchase agreement</link:label>
    <link:label id="lab_colb_Repaymentoftermrepurchaseagreement_A9586A52AFD1F43EE9120803C0196AEF_documentation_en-US" xlink:label="lab_colb_Repaymentoftermrepurchaseagreement_A9586A52AFD1F43EE9120803C0196AEF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Repayment of term repurchase agreement</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Repaymentoftermrepurchaseagreement" xlink:label="loc_colb_Repaymentoftermrepurchaseagreement_A9586A52AFD1F43EE9120803C0196AEF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Repaymentoftermrepurchaseagreement_A9586A52AFD1F43EE9120803C0196AEF" xlink:to="lab_colb_Repaymentoftermrepurchaseagreement_A9586A52AFD1F43EE9120803C0196AEF" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_3649E25F2C651D3F655D0803C019FA5C_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_3649E25F2C651D3F655D0803C019FA5C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchase and retirement of common stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_3649E25F2C651D3F655D0803C019FA5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_3649E25F2C651D3F655D0803C019FA5C" xlink:to="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_3649E25F2C651D3F655D0803C019FA5C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_02F645723A716F32C6E40803C019A569_negatedLabel_en-US" xlink:label="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_02F645723A716F32C6E40803C019A569" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Proceeds from excess tax benefit from stock-based compensation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_02F645723A716F32C6E40803C019A569" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_02F645723A716F32C6E40803C019A569" xlink:to="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_02F645723A716F32C6E40803C019A569" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_E6BF41784B6B9C0F52410803C019E536_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_E6BF41784B6B9C0F52410803C019E536" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by financing activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_E6BF41784B6B9C0F52410803C019E536" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_E6BF41784B6B9C0F52410803C019E536" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_E6BF41784B6B9C0F52410803C019E536" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_D86FCB682D92F1BD201A0803C019B748_totalLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_D86FCB682D92F1BD201A0803C019B748" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Increase (decrease) in cash and cash equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_D86FCB682D92F1BD201A0803C019B748" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_D86FCB682D92F1BD201A0803C019B748" xlink:to="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_D86FCB682D92F1BD201A0803C019B748" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_DCDACB66B3990B76F2580803C0196649_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_DCDACB66B3990B76F2580803C0196649" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental Information:</link:label>
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_DCDACB66B3990B76F2580803C0196649_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_DCDACB66B3990B76F2580803C0196649" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_DCDACB66B3990B76F2580803C0196649" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_DCDACB66B3990B76F2580803C0196649" xlink:to="lab_us-gaap_SupplementalCashFlowInformationAbstract_DCDACB66B3990B76F2580803C0196649" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestPaidNet_F6D50079B2D5F63A01430803C0199E0F_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet_F6D50079B2D5F63A01430803C0199E0F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash paid for interest</link:label>
    <link:label id="lab_us-gaap_InterestPaidNet_F6D50079B2D5F63A01430803C0199E0F_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet_F6D50079B2D5F63A01430803C0199E0F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Paid, Excluding Capitalized Interest, Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="loc_us-gaap_InterestPaidNet_F6D50079B2D5F63A01430803C0199E0F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPaidNet_F6D50079B2D5F63A01430803C0199E0F" xlink:to="lab_us-gaap_InterestPaidNet_F6D50079B2D5F63A01430803C0199E0F" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxesPaid_1F98043C3E5A1EEE73260803C019AC1E_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid_1F98043C3E5A1EEE73260803C019AC1E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash paid for income tax</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaid_1F98043C3E5A1EEE73260803C019AC1E_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaid_1F98043C3E5A1EEE73260803C019AC1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:label="loc_us-gaap_IncomeTaxesPaid_1F98043C3E5A1EEE73260803C019AC1E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaid_1F98043C3E5A1EEE73260803C019AC1E" xlink:to="lab_us-gaap_IncomeTaxesPaid_1F98043C3E5A1EEE73260803C019AC1E" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoncashInvestingAndFinancingItemsAbstract_194CB7417634FDB938B70803C019987A_terseLabel_en-US" xlink:label="lab_us-gaap_NoncashInvestingAndFinancingItemsAbstract_194CB7417634FDB938B70803C019987A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-cash investing and financing activities</link:label>
    <link:label id="lab_us-gaap_NoncashInvestingAndFinancingItemsAbstract_194CB7417634FDB938B70803C019987A_label_en-US" xlink:label="lab_us-gaap_NoncashInvestingAndFinancingItemsAbstract_194CB7417634FDB938B70803C019987A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncash Investing and Financing Items [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract" xlink:label="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_194CB7417634FDB938B70803C019987A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_194CB7417634FDB938B70803C019987A" xlink:to="lab_us-gaap_NoncashInvestingAndFinancingItemsAbstract_194CB7417634FDB938B70803C019987A" xlink:type="arc" />
    <link:label id="lab_us-gaap_TransferToOtherRealEstate_A5B0C6088DB5D13087B50803C0197BC1_terseLabel_en-US" xlink:label="lab_us-gaap_TransferToOtherRealEstate_A5B0C6088DB5D13087B50803C0197BC1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans transferred to other real estate owned</link:label>
    <link:label id="lab_us-gaap_TransferToOtherRealEstate_A5B0C6088DB5D13087B50803C0197BC1_label_en-US" xlink:label="lab_us-gaap_TransferToOtherRealEstate_A5B0C6088DB5D13087B50803C0197BC1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Owned, Transfer to Real Estate Owned</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TransferToOtherRealEstate" xlink:label="loc_us-gaap_TransferToOtherRealEstate_A5B0C6088DB5D13087B50803C0197BC1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TransferToOtherRealEstate_A5B0C6088DB5D13087B50803C0197BC1" xlink:to="lab_us-gaap_TransferToOtherRealEstate_A5B0C6088DB5D13087B50803C0197BC1" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssued1_BBDC8F8FD975FD8394E20803C0191741_verboseLabel_en-US" xlink:label="lab_us-gaap_StockIssued1_BBDC8F8FD975FD8394E20803C0191741" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Share-based consideration issued in business combinations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssued1" xlink:label="loc_us-gaap_StockIssued1_BBDC8F8FD975FD8394E20803C0191741" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssued1_BBDC8F8FD975FD8394E20803C0191741" xlink:to="lab_us-gaap_StockIssued1_BBDC8F8FD975FD8394E20803C0191741" xlink:type="arc" />
    <link:label id="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_20060619FAD4E6D48E670803C0197E16_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_20060619FAD4E6D48E670803C0197E16" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Expenditures Incurred but Not yet Paid</link:label>
    <link:label id="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_20060619FAD4E6D48E670803C0197E16_label_en-US" xlink:label="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_20060619FAD4E6D48E670803C0197E16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capital Expenditures Incurred but Not yet Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_20060619FAD4E6D48E670803C0197E16" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_20060619FAD4E6D48E670803C0197E16" xlink:to="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_20060619FAD4E6D48E670803C0197E16" xlink:type="arc" />
    <link:label id="lab_colb_Changeindividendspayableonunvestedshares_91AA43E0989FB3F87E100803C01913A9_terseLabel_en-US" xlink:label="lab_colb_Changeindividendspayableonunvestedshares_91AA43E0989FB3F87E100803C01913A9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in dividends payable on unvested shares</link:label>
    <link:label id="lab_colb_Changeindividendspayableonunvestedshares_91AA43E0989FB3F87E100803C01913A9_label_en-US" xlink:label="lab_colb_Changeindividendspayableonunvestedshares_91AA43E0989FB3F87E100803C01913A9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in dividends payable on unvested shares</link:label>
    <link:label id="lab_colb_Changeindividendspayableonunvestedshares_91AA43E0989FB3F87E100803C01913A9_documentation_en-US" xlink:label="lab_colb_Changeindividendspayableonunvestedshares_91AA43E0989FB3F87E100803C01913A9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Change in dividends payable on unvested shares included in other liabilities.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Changeindividendspayableonunvestedshares" xlink:label="loc_colb_Changeindividendspayableonunvestedshares_91AA43E0989FB3F87E100803C01913A9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Changeindividendspayableonunvestedshares_91AA43E0989FB3F87E100803C01913A9" xlink:to="lab_colb_Changeindividendspayableonunvestedshares_91AA43E0989FB3F87E100803C01913A9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_A3679655F7154BBF04C1A54E6D95C692_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_A3679655F7154BBF04C1A54E6D95C692" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Financing Receivable, Troubled Debt Restructurings [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_A3679655F7154BBF04C1A54E6D95C692_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_A3679655F7154BBF04C1A54E6D95C692" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Financing Receivable, Troubled Debt Restructurings [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_A3679655F7154BBF04C1A54E6D95C692" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_A3679655F7154BBF04C1A54E6D95C692" xlink:to="lab_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_A3679655F7154BBF04C1A54E6D95C692" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FD3616CDA584FA3CF90EA54E6D956C0C_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FD3616CDA584FA3CF90EA54E6D956C0C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Financing Receivable [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FD3616CDA584FA3CF90EA54E6D956C0C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FD3616CDA584FA3CF90EA54E6D956C0C" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_FD3616CDA584FA3CF90EA54E6D956C0C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableModificationsLineItems_9951963C611F5DCCB013A54E6D9557E0_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsLineItems_9951963C611F5DCCB013A54E6D9557E0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications [Line Items]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableModificationsLineItems_9951963C611F5DCCB013A54E6D9557E0_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsLineItems_9951963C611F5DCCB013A54E6D9557E0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableModificationsLineItems" xlink:label="loc_us-gaap_FinancingReceivableModificationsLineItems_9951963C611F5DCCB013A54E6D9557E0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_9951963C611F5DCCB013A54E6D9557E0" xlink:to="lab_us-gaap_FinancingReceivableModificationsLineItems_9951963C611F5DCCB013A54E6D9557E0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_62B1916BDE44CFBBD067A54E6D95E73F_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_62B1916BDE44CFBBD067A54E6D95E73F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications, Subsequent Default, Number of Contracts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1" xlink:label="loc_us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_62B1916BDE44CFBBD067A54E6D95E73F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_62B1916BDE44CFBBD067A54E6D95E73F" xlink:to="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1_62B1916BDE44CFBBD067A54E6D95E73F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1_41D5A2818BCF0AF5613CA54E6D95AB50_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1_41D5A2818BCF0AF5613CA54E6D95AB50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications, Subsequent Default, Recorded Investment</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1_41D5A2818BCF0AF5613CA54E6D95AB50_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1_41D5A2818BCF0AF5613CA54E6D95AB50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications, Subsequent Default, Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1" xlink:label="loc_us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1_41D5A2818BCF0AF5613CA54E6D95AB50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1_41D5A2818BCF0AF5613CA54E6D95AB50" xlink:to="lab_us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1_41D5A2818BCF0AF5613CA54E6D95AB50" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_B98EF9740A33B473B715A54E6D95CB7E_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_B98EF9740A33B473B715A54E6D95CB7E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pre-Modification Outstanding Recorded Investment</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_B98EF9740A33B473B715A54E6D95CB7E_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_B98EF9740A33B473B715A54E6D95CB7E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications, Pre-Modification Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2" xlink:label="loc_us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_B98EF9740A33B473B715A54E6D95CB7E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_B98EF9740A33B473B715A54E6D95CB7E" xlink:to="lab_us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2_B98EF9740A33B473B715A54E6D95CB7E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_C93FC08981E72F15C80DA54E6D9573B1_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_C93FC08981E72F15C80DA54E6D9573B1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Post-Modification Outstanding Recorded Investment</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_C93FC08981E72F15C80DA54E6D9573B1_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_C93FC08981E72F15C80DA54E6D9573B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications, Post-Modification Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2" xlink:label="loc_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_C93FC08981E72F15C80DA54E6D9573B1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_C93FC08981E72F15C80DA54E6D9573B1" xlink:to="lab_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_C93FC08981E72F15C80DA54E6D9573B1" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_DA92CED5EB55ECBAD66F06BF561CDE2A_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis_DA92CED5EB55ECBAD66F06BF561CDE2A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Basis [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_DA92CED5EB55ECBAD66F06BF561CDE2A_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis_DA92CED5EB55ECBAD66F06BF561CDE2A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Basis [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_DA92CED5EB55ECBAD66F06BF561CDE2A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_DA92CED5EB55ECBAD66F06BF561CDE2A" xlink:to="lab_us-gaap_FairValueByMeasurementBasisAxis_DA92CED5EB55ECBAD66F06BF561CDE2A" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosureItemAmountsDomain_640CE48623D882DB558606BF561C16EC_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosureItemAmountsDomain_640CE48623D882DB558606BF561C16EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Measurement [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosureItemAmountsDomain_640CE48623D882DB558606BF561C16EC_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosureItemAmountsDomain_640CE48623D882DB558606BF561C16EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_640CE48623D882DB558606BF561C16EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_640CE48623D882DB558606BF561C16EC" xlink:to="lab_us-gaap_FairValueDisclosureItemAmountsDomain_640CE48623D882DB558606BF561C16EC" xlink:type="arc" />
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_8C1CDDCF736EF2BE186206BF561DB1E4_terseLabel_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_8C1CDDCF736EF2BE186206BF561DB1E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Portion at Fair Value Measurement [Member]</link:label>
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_8C1CDDCF736EF2BE186206BF561DB1E4_label_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_8C1CDDCF736EF2BE186206BF561DB1E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Portion at Fair Value Measurement [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_8C1CDDCF736EF2BE186206BF561DB1E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_8C1CDDCF736EF2BE186206BF561DB1E4" xlink:to="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_8C1CDDCF736EF2BE186206BF561DB1E4" xlink:type="arc" />
    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_4C713255082D0EC0293406BF561DB6F3_terseLabel_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_4C713255082D0EC0293406BF561DB6F3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimate of Fair Value Measurement [Member]</link:label>
    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_4C713255082D0EC0293406BF561DB6F3_label_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_4C713255082D0EC0293406BF561DB6F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Estimate of Fair Value Measurement [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_4C713255082D0EC0293406BF561DB6F3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_4C713255082D0EC0293406BF561DB6F3" xlink:to="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_4C713255082D0EC0293406BF561DB6F3" xlink:type="arc" />
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_88507EFCBFC072C7B39506BF561DA6F8_terseLabel_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_88507EFCBFC072C7B39506BF561DA6F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reported Value Measurement [Member]</link:label>
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_88507EFCBFC072C7B39506BF561DA6F8_label_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_88507EFCBFC072C7B39506BF561DA6F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reported Value Measurement [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_88507EFCBFC072C7B39506BF561DA6F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_88507EFCBFC072C7B39506BF561DA6F8" xlink:to="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_88507EFCBFC072C7B39506BF561DA6F8" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_D552C408D598AB8FE26506BF561E34B5_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_D552C408D598AB8FE26506BF561E34B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_D552C408D598AB8FE26506BF561E34B5_label_en-US" xlink:label="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_D552C408D598AB8FE26506BF561E34B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_D552C408D598AB8FE26506BF561E34B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_D552C408D598AB8FE26506BF561E34B5" xlink:to="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_D552C408D598AB8FE26506BF561E34B5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_B2B940488A75732B807706BF561E375C_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_B2B940488A75732B807706BF561E375C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:label id="lab_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_B2B940488A75732B807706BF561E375C_label_en-US" xlink:label="lab_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_B2B940488A75732B807706BF561E375C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_B2B940488A75732B807706BF561E375C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_B2B940488A75732B807706BF561E375C" xlink:to="lab_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_B2B940488A75732B807706BF561E375C" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_9B6C57CBD43291DAB0EB06BF561E67AA_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_9B6C57CBD43291DAB0EB06BF561E67AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and due from banks</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_9B6C57CBD43291DAB0EB06BF561E67AA_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_9B6C57CBD43291DAB0EB06BF561E67AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_9B6C57CBD43291DAB0EB06BF561E67AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_9B6C57CBD43291DAB0EB06BF561E67AA" xlink:to="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_9B6C57CBD43291DAB0EB06BF561E67AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestBearingDepositsInBanks_EB7DAE542345451FDF1706BF561F9A26_terseLabel_en-US" xlink:label="lab_us-gaap_InterestBearingDepositsInBanks_EB7DAE542345451FDF1706BF561F9A26" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest-earning deposits with banks</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestBearingDepositsInBanks" xlink:label="loc_us-gaap_InterestBearingDepositsInBanks_EB7DAE542345451FDF1706BF561F9A26" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestBearingDepositsInBanks_EB7DAE542345451FDF1706BF561F9A26" xlink:to="lab_us-gaap_InterestBearingDepositsInBanks_EB7DAE542345451FDF1706BF561F9A26" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_90B4DDECC5212CD291AD06BF561F7409_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_90B4DDECC5212CD291AD06BF561F7409" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_90B4DDECC5212CD291AD06BF561F7409" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_90B4DDECC5212CD291AD06BF561F7409" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_90B4DDECC5212CD291AD06BF561F7409" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure_BC4A750B06F51992F24F06BF561F8313_verboseLabel_en-US" xlink:label="lab_us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure_BC4A750B06F51992F24F06BF561F8313" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">FHLB stock</link:label>
    <link:label id="lab_us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure_BC4A750B06F51992F24F06BF561F8313_label_en-US" xlink:label="lab_us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure_BC4A750B06F51992F24F06BF561F8313" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment in Federal Home Loan Bank Stock, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure_BC4A750B06F51992F24F06BF561F8313" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure_BC4A750B06F51992F24F06BF561F8313" xlink:to="lab_us-gaap_InvestmentInFederalHomeLoanBankStockFairValueDisclosure_BC4A750B06F51992F24F06BF561F8313" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansHeldForSaleFairValueDisclosure_086EF390FD445B1CF92706BF561F56F8_terseLabel_en-US" xlink:label="lab_us-gaap_LoansHeldForSaleFairValueDisclosure_086EF390FD445B1CF92706BF561F56F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans held for sale</link:label>
    <link:label id="lab_us-gaap_LoansHeldForSaleFairValueDisclosure_086EF390FD445B1CF92706BF561F56F8_label_en-US" xlink:label="lab_us-gaap_LoansHeldForSaleFairValueDisclosure_086EF390FD445B1CF92706BF561F56F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Held-for-sale, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:label="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_086EF390FD445B1CF92706BF561F56F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_086EF390FD445B1CF92706BF561F56F8" xlink:to="lab_us-gaap_LoansHeldForSaleFairValueDisclosure_086EF390FD445B1CF92706BF561F56F8" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableFairValueDisclosure_9E29BA1086B4BA96171406BF561F0F5F_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableFairValueDisclosure_9E29BA1086B4BA96171406BF561F0F5F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans</link:label>
    <link:label id="lab_us-gaap_LoansReceivableFairValueDisclosure_9E29BA1086B4BA96171406BF561F0F5F_label_en-US" xlink:label="lab_us-gaap_LoansReceivableFairValueDisclosure_9E29BA1086B4BA96171406BF561F0F5F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableFairValueDisclosure" xlink:label="loc_us-gaap_LoansReceivableFairValueDisclosure_9E29BA1086B4BA96171406BF561F0F5F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableFairValueDisclosure_9E29BA1086B4BA96171406BF561F0F5F" xlink:to="lab_us-gaap_LoansReceivableFairValueDisclosure_9E29BA1086B4BA96171406BF561F0F5F" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestRateDerivativeAssetsAtFairValue_029D6D0EDB31FDBD964906BF56207803_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestRateDerivativeAssetsAtFairValue_029D6D0EDB31FDBD964906BF56207803" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Interest rate contracts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateDerivativeAssetsAtFairValue" xlink:label="loc_us-gaap_InterestRateDerivativeAssetsAtFairValue_029D6D0EDB31FDBD964906BF56207803" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateDerivativeAssetsAtFairValue_029D6D0EDB31FDBD964906BF56207803" xlink:to="lab_us-gaap_InterestRateDerivativeAssetsAtFairValue_029D6D0EDB31FDBD964906BF56207803" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_C9A50C7A72E0AD4A8D2A06BF56201E04_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_C9A50C7A72E0AD4A8D2A06BF56201E04" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:label id="lab_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_C9A50C7A72E0AD4A8D2A06BF56201E04_label_en-US" xlink:label="lab_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_C9A50C7A72E0AD4A8D2A06BF56201E04" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_C9A50C7A72E0AD4A8D2A06BF56201E04" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_C9A50C7A72E0AD4A8D2A06BF56201E04" xlink:to="lab_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_C9A50C7A72E0AD4A8D2A06BF56201E04" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepositsFairValueDisclosure_0A66202C2D6E508E951406BF5620A0DB_terseLabel_en-US" xlink:label="lab_us-gaap_DepositsFairValueDisclosure_0A66202C2D6E508E951406BF5620A0DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Time Deposits</link:label>
    <link:label id="lab_us-gaap_DepositsFairValueDisclosure_0A66202C2D6E508E951406BF5620A0DB_label_en-US" xlink:label="lab_us-gaap_DepositsFairValueDisclosure_0A66202C2D6E508E951406BF5620A0DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposits, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositsFairValueDisclosure" xlink:label="loc_us-gaap_DepositsFairValueDisclosure_0A66202C2D6E508E951406BF5620A0DB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositsFairValueDisclosure_0A66202C2D6E508E951406BF5620A0DB" xlink:to="lab_us-gaap_DepositsFairValueDisclosure_0A66202C2D6E508E951406BF5620A0DB" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_381B2AB13F12C44454E506BF56208E7A_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_381B2AB13F12C44454E506BF56208E7A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FHLB Advances</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_381B2AB13F12C44454E506BF56208E7A_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_381B2AB13F12C44454E506BF56208E7A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Borrowings, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure" xlink:label="loc_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_381B2AB13F12C44454E506BF56208E7A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_381B2AB13F12C44454E506BF56208E7A" xlink:to="lab_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_381B2AB13F12C44454E506BF56208E7A" xlink:type="arc" />
    <link:label id="lab_us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure_6B6637F6F4C178C6603A06BF5620641A_terseLabel_en-US" xlink:label="lab_us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure_6B6637F6F4C178C6603A06BF5620641A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repurchase agreements</link:label>
    <link:label id="lab_us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure_6B6637F6F4C178C6603A06BF5620641A_label_en-US" xlink:label="lab_us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure_6B6637F6F4C178C6603A06BF5620641A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities Loaned or Sold under Agreements to Repurchase, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure" xlink:label="loc_us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure_6B6637F6F4C178C6603A06BF5620641A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure_6B6637F6F4C178C6603A06BF5620641A" xlink:to="lab_us-gaap_SecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure_6B6637F6F4C178C6603A06BF5620641A" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_77648951062877A1B9BE06BF56213DAF_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_77648951062877A1B9BE06BF56213DAF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate contracts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateDerivativeLiabilitiesAtFairValue" xlink:label="loc_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_77648951062877A1B9BE06BF56213DAF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_77648951062877A1B9BE06BF56213DAF" xlink:to="lab_us-gaap_InterestRateDerivativeLiabilitiesAtFairValue_77648951062877A1B9BE06BF56213DAF" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_3D25CFF539C941A1BD4806BF5621E94D_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_3D25CFF539C941A1BD4806BF5621E94D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated Debt Obligations, Fair Value Disclosure</link:label>
    <link:label id="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_3D25CFF539C941A1BD4806BF5621E94D_label_en-US" xlink:label="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_3D25CFF539C941A1BD4806BF5621E94D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Subordinated Debt Obligations, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_3D25CFF539C941A1BD4806BF5621E94D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_3D25CFF539C941A1BD4806BF5621E94D" xlink:to="lab_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_3D25CFF539C941A1BD4806BF5621E94D" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_00DF676B1A7A9E1BE7C206BF5621015A_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_00DF676B1A7A9E1BE7C206BF5621015A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Liabilities, Fair Value Disclosure</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_00DF676B1A7A9E1BE7C206BF5621015A_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_00DF676B1A7A9E1BE7C206BF5621015A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherLiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_00DF676B1A7A9E1BE7C206BF5621015A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_00DF676B1A7A9E1BE7C206BF5621015A" xlink:to="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_00DF676B1A7A9E1BE7C206BF5621015A" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnallocatedFinancingReceivablesMember_1820ACB994D334AE03425B4F0A981595_terseLabel_en-US" xlink:label="lab_us-gaap_UnallocatedFinancingReceivablesMember_1820ACB994D334AE03425B4F0A981595" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unallocated Financing Receivables [Member]</link:label>
    <link:label id="lab_us-gaap_UnallocatedFinancingReceivablesMember_1820ACB994D334AE03425B4F0A981595_label_en-US" xlink:label="lab_us-gaap_UnallocatedFinancingReceivablesMember_1820ACB994D334AE03425B4F0A981595" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unallocated Financing Receivables [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnallocatedFinancingReceivablesMember" xlink:label="loc_us-gaap_UnallocatedFinancingReceivablesMember_1820ACB994D334AE03425B4F0A981595" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnallocatedFinancingReceivablesMember_1820ACB994D334AE03425B4F0A981595" xlink:to="lab_us-gaap_UnallocatedFinancingReceivablesMember_1820ACB994D334AE03425B4F0A981595" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllowanceForLoanAndLeaseLossesRollForward_A8855A856D8DECAACEA45B4F0A989530_label_en-US" xlink:label="lab_us-gaap_AllowanceForLoanAndLeaseLossesRollForward_A8855A856D8DECAACEA45B4F0A989530" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance for Loan and Lease Losses [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForLoanAndLeaseLossesRollForward" xlink:label="loc_us-gaap_AllowanceForLoanAndLeaseLossesRollForward_A8855A856D8DECAACEA45B4F0A989530" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossesRollForward_A8855A856D8DECAACEA45B4F0A989530" xlink:to="lab_us-gaap_AllowanceForLoanAndLeaseLossesRollForward_A8855A856D8DECAACEA45B4F0A989530" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowance_0BAA182425507CA6BC215B4F0A9893C1_periodStartLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowance_0BAA182425507CA6BC215B4F0A9893C1" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance at beginning of year</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowance_0BAA182425507CA6BC215B4F0A9893C1_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowance_0BAA182425507CA6BC215B4F0A9893C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Allowance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowance" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowance_0BAA182425507CA6BC215B4F0A9893C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowance_0BAA182425507CA6BC215B4F0A9893C1" xlink:to="lab_us-gaap_LoansAndLeasesReceivableAllowance_0BAA182425507CA6BC215B4F0A9893C1" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_53B37398FD58CAE195385B4F0AA73F94_negatedLabel_en-US" xlink:label="lab_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_53B37398FD58CAE195385B4F0AA73F94" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Charge-offs</link:label>
    <link:label id="lab_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_53B37398FD58CAE195385B4F0AA73F94_label_en-US" xlink:label="lab_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_53B37398FD58CAE195385B4F0AA73F94" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance for Loan and Lease Losses, Write-offs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs" xlink:label="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_53B37398FD58CAE195385B4F0AA73F94" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_53B37398FD58CAE195385B4F0AA73F94" xlink:to="lab_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_53B37398FD58CAE195385B4F0AA73F94" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts_FDFFD56779C28C8C8FBF5B4F0AA7F2EC_verboseLabel_en-US" xlink:label="lab_us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts_FDFFD56779C28C8C8FBF5B4F0AA7F2EC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Recoveries</link:label>
    <link:label id="lab_us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts_FDFFD56779C28C8C8FBF5B4F0AA7F2EC_label_en-US" xlink:label="lab_us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts_FDFFD56779C28C8C8FBF5B4F0AA7F2EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance for Loan and Lease Loss, Recovery of Bad Debts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts" xlink:label="loc_us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts_FDFFD56779C28C8C8FBF5B4F0AA7F2EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts_FDFFD56779C28C8C8FBF5B4F0AA7F2EC" xlink:to="lab_us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts_FDFFD56779C28C8C8FBF5B4F0AA7F2EC" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowance_BDDD7A8B598B1D6660EB5B4F0AA7C62F_periodEndLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowance_BDDD7A8B598B1D6660EB5B4F0AA7C62F" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance at the end of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowance" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowance_BDDD7A8B598B1D6660EB5B4F0AA7C62F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowance_BDDD7A8B598B1D6660EB5B4F0AA7C62F" xlink:to="lab_us-gaap_LoansAndLeasesReceivableAllowance_BDDD7A8B598B1D6660EB5B4F0AA7C62F" xlink:type="arc" />
    <link:label id="lab_colb_LoanAndLeaseLossesSpecificReserve_88DED53E4D92291347AB5B4F0AA79B20_terseLabel_en-US" xlink:label="lab_colb_LoanAndLeaseLossesSpecificReserve_88DED53E4D92291347AB5B4F0AA79B20" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Specific Reserve</link:label>
    <link:label id="lab_colb_LoanAndLeaseLossesSpecificReserve_88DED53E4D92291347AB5B4F0AA79B20_label_en-US" xlink:label="lab_colb_LoanAndLeaseLossesSpecificReserve_88DED53E4D92291347AB5B4F0AA79B20" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan and Lease Losses Specific Reserve</link:label>
    <link:label id="lab_colb_LoanAndLeaseLossesSpecificReserve_88DED53E4D92291347AB5B4F0AA79B20_documentation_en-US" xlink:label="lab_colb_LoanAndLeaseLossesSpecificReserve_88DED53E4D92291347AB5B4F0AA79B20" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loan and Lease Losses Specific Reserve</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoanAndLeaseLossesSpecificReserve" xlink:label="loc_colb_LoanAndLeaseLossesSpecificReserve_88DED53E4D92291347AB5B4F0AA79B20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoanAndLeaseLossesSpecificReserve_88DED53E4D92291347AB5B4F0AA79B20" xlink:to="lab_colb_LoanAndLeaseLossesSpecificReserve_88DED53E4D92291347AB5B4F0AA79B20" xlink:type="arc" />
    <link:label id="lab_colb_LoanAndLeaseLossesGeneralAllocation_0B7C34C8F5AD5E73036E5B4F0AA76659_terseLabel_en-US" xlink:label="lab_colb_LoanAndLeaseLossesGeneralAllocation_0B7C34C8F5AD5E73036E5B4F0AA76659" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General Allocation</link:label>
    <link:label id="lab_colb_LoanAndLeaseLossesGeneralAllocation_0B7C34C8F5AD5E73036E5B4F0AA76659_label_en-US" xlink:label="lab_colb_LoanAndLeaseLossesGeneralAllocation_0B7C34C8F5AD5E73036E5B4F0AA76659" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan and Lease Losses General Allocation</link:label>
    <link:label id="lab_colb_LoanAndLeaseLossesGeneralAllocation_0B7C34C8F5AD5E73036E5B4F0AA76659_documentation_en-US" xlink:label="lab_colb_LoanAndLeaseLossesGeneralAllocation_0B7C34C8F5AD5E73036E5B4F0AA76659" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loan and Lease Losses General Allocation</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoanAndLeaseLossesGeneralAllocation" xlink:label="loc_colb_LoanAndLeaseLossesGeneralAllocation_0B7C34C8F5AD5E73036E5B4F0AA76659" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoanAndLeaseLossesGeneralAllocation_0B7C34C8F5AD5E73036E5B4F0AA76659" xlink:to="lab_colb_LoanAndLeaseLossesGeneralAllocation_0B7C34C8F5AD5E73036E5B4F0AA76659" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_E5DD6F92CACAB765D696075904A83BB8_terseLabel_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_E5DD6F92CACAB765D696075904A83BB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-Based Payments</link:label>
    <link:label id="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_E5DD6F92CACAB765D696075904A83BB8_label_en-US" xlink:label="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_E5DD6F92CACAB765D696075904A83BB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disclosure of Compensation Related Costs, Share-based Payments [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_E5DD6F92CACAB765D696075904A83BB8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_E5DD6F92CACAB765D696075904A83BB8" xlink:to="lab_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_E5DD6F92CACAB765D696075904A83BB8" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationDisclosureTextBlock_3C081765D661C3DEA012074CA9DC7F7A_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationDisclosureTextBlock_3C081765D661C3DEA012074CA9DC7F7A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination Disclosure [Text Block]</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationDisclosureTextBlock_3C081765D661C3DEA012074CA9DC7F7A_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationDisclosureTextBlock_3C081765D661C3DEA012074CA9DC7F7A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="loc_us-gaap_BusinessCombinationDisclosureTextBlock_3C081765D661C3DEA012074CA9DC7F7A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationDisclosureTextBlock_3C081765D661C3DEA012074CA9DC7F7A" xlink:to="lab_us-gaap_BusinessCombinationDisclosureTextBlock_3C081765D661C3DEA012074CA9DC7F7A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_80A13F542A61948167415B4F0A88F33F_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_80A13F542A61948167415B4F0A88F33F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_80A13F542A61948167415B4F0A88F33F_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_80A13F542A61948167415B4F0A88F33F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_80A13F542A61948167415B4F0A88F33F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_80A13F542A61948167415B4F0A88F33F" xlink:to="lab_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_80A13F542A61948167415B4F0A88F33F" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_F39C31F9E559F0B5D65D5B4F0A884ADF_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_F39C31F9E559F0B5D65D5B4F0A884ADF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Pro Forma Information [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_F39C31F9E559F0B5D65D5B4F0A884ADF_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_F39C31F9E559F0B5D65D5B4F0A884ADF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Pro Forma Information [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationTextBlock" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_F39C31F9E559F0B5D65D5B4F0A884ADF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_F39C31F9E559F0B5D65D5B4F0A884ADF" xlink:to="lab_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_F39C31F9E559F0B5D65D5B4F0A884ADF" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock_EB9909D1735AB8D09F795B4F0A880E39_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock_EB9909D1735AB8D09F795B4F0A880E39" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block]</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock_EB9909D1735AB8D09F795B4F0A880E39_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock_EB9909D1735AB8D09F795B4F0A880E39" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock" xlink:label="loc_us-gaap_BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock_EB9909D1735AB8D09F795B4F0A880E39" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock_EB9909D1735AB8D09F795B4F0A880E39" xlink:to="lab_us-gaap_BusinessAcquisitionIntegrationRestructuringAndOtherRelatedCostsTextBlock_EB9909D1735AB8D09F795B4F0A880E39" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_B4A62DE79A0BE73209410758FFFEC3CB_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_B4A62DE79A0BE73209410758FFFEC3CB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue from Contract with Customer [Text Block]</link:label>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_B4A62DE79A0BE73209410758FFFEC3CB_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_B4A62DE79A0BE73209410758FFFEC3CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from Contract with Customer [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerTextBlock" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerTextBlock_B4A62DE79A0BE73209410758FFFEC3CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerTextBlock_B4A62DE79A0BE73209410758FFFEC3CB" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_B4A62DE79A0BE73209410758FFFEC3CB" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_FC856A7451D24F1A5943075908F4A2F9_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_FC856A7451D24F1A5943075908F4A2F9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securities</link:label>
    <link:label id="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_FC856A7451D24F1A5943075908F4A2F9_label_en-US" xlink:label="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_FC856A7451D24F1A5943075908F4A2F9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock" xlink:label="loc_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_FC856A7451D24F1A5943075908F4A2F9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_FC856A7451D24F1A5943075908F4A2F9" xlink:to="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_FC856A7451D24F1A5943075908F4A2F9" xlink:type="arc" />
    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_837DA6136CD361EEDB130758FBE4144C_verboseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_837DA6136CD361EEDB130758FBE4144C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets</link:label>
    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_837DA6136CD361EEDB130758FBE4144C_label_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_837DA6136CD361EEDB130758FBE4144C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_837DA6136CD361EEDB130758FBE4144C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_837DA6136CD361EEDB130758FBE4144C" xlink:to="lab_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_837DA6136CD361EEDB130758FBE4144C" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_93F5957C63CB93F4A81506BF578EFDFD_terseLabel_en-US" xlink:label="lab_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_93F5957C63CB93F4A81506BF578EFDFD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Demand and other noninterest-bearing</link:label>
    <link:label id="lab_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_93F5957C63CB93F4A81506BF578EFDFD_label_en-US" xlink:label="lab_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_93F5957C63CB93F4A81506BF578EFDFD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noninterest-bearing Deposit Liabilities, Domestic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestBearingDepositLiabilitiesDomestic" xlink:label="loc_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_93F5957C63CB93F4A81506BF578EFDFD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_93F5957C63CB93F4A81506BF578EFDFD" xlink:to="lab_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_93F5957C63CB93F4A81506BF578EFDFD" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestBearingDomesticDepositDemand_478A884A3EE7274E47B706BF578ED7E6_terseLabel_en-US" xlink:label="lab_us-gaap_InterestBearingDomesticDepositDemand_478A884A3EE7274E47B706BF578ED7E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest-bearing demand</link:label>
    <link:label id="lab_us-gaap_InterestBearingDomesticDepositDemand_478A884A3EE7274E47B706BF578ED7E6_label_en-US" xlink:label="lab_us-gaap_InterestBearingDomesticDepositDemand_478A884A3EE7274E47B706BF578ED7E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest-bearing Domestic Deposit, Demand</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestBearingDomesticDepositDemand" xlink:label="loc_us-gaap_InterestBearingDomesticDepositDemand_478A884A3EE7274E47B706BF578ED7E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestBearingDomesticDepositDemand_478A884A3EE7274E47B706BF578ED7E6" xlink:to="lab_us-gaap_InterestBearingDomesticDepositDemand_478A884A3EE7274E47B706BF578ED7E6" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepositsMoneyMarketDeposits_23FAE92E6AB285E7225406BF578EEFF6_terseLabel_en-US" xlink:label="lab_us-gaap_DepositsMoneyMarketDeposits_23FAE92E6AB285E7225406BF578EEFF6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Money market</link:label>
    <link:label id="lab_us-gaap_DepositsMoneyMarketDeposits_23FAE92E6AB285E7225406BF578EEFF6_label_en-US" xlink:label="lab_us-gaap_DepositsMoneyMarketDeposits_23FAE92E6AB285E7225406BF578EEFF6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposits, Money Market Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositsMoneyMarketDeposits" xlink:label="loc_us-gaap_DepositsMoneyMarketDeposits_23FAE92E6AB285E7225406BF578EEFF6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositsMoneyMarketDeposits_23FAE92E6AB285E7225406BF578EEFF6" xlink:to="lab_us-gaap_DepositsMoneyMarketDeposits_23FAE92E6AB285E7225406BF578EEFF6" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepositsSavingsDeposits_8138EA0B1E48338AF92A06BF578EECAA_terseLabel_en-US" xlink:label="lab_us-gaap_DepositsSavingsDeposits_8138EA0B1E48338AF92A06BF578EECAA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Savings</link:label>
    <link:label id="lab_us-gaap_DepositsSavingsDeposits_8138EA0B1E48338AF92A06BF578EECAA_label_en-US" xlink:label="lab_us-gaap_DepositsSavingsDeposits_8138EA0B1E48338AF92A06BF578EECAA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposits, Savings Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositsSavingsDeposits" xlink:label="loc_us-gaap_DepositsSavingsDeposits_8138EA0B1E48338AF92A06BF578EECAA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositsSavingsDeposits_8138EA0B1E48338AF92A06BF578EECAA" xlink:to="lab_us-gaap_DepositsSavingsDeposits_8138EA0B1E48338AF92A06BF578EECAA" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDepositsLessThan100000_8379468456DF091AC09E06BF578E114B_terseLabel_en-US" xlink:label="lab_us-gaap_TimeDepositsLessThan100000_8379468456DF091AC09E06BF578E114B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Certificates of deposit less than $250,000</link:label>
    <link:label id="lab_us-gaap_TimeDepositsLessThan100000_8379468456DF091AC09E06BF578E114B_label_en-US" xlink:label="lab_us-gaap_TimeDepositsLessThan100000_8379468456DF091AC09E06BF578E114B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Deposits, Less than $100,000</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeDepositsLessThan100000" xlink:label="loc_us-gaap_TimeDepositsLessThan100000_8379468456DF091AC09E06BF578E114B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDepositsLessThan100000_8379468456DF091AC09E06BF578E114B" xlink:to="lab_us-gaap_TimeDepositsLessThan100000_8379468456DF091AC09E06BF578E114B" xlink:type="arc" />
    <link:label id="lab_colb_CoreDeposits_BAA18EC270B6F00028A106BF578ED21F_totalLabel_en-US" xlink:label="lab_colb_CoreDeposits_BAA18EC270B6F00028A106BF578ED21F" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total core deposits</link:label>
    <link:label id="lab_colb_CoreDeposits_BAA18EC270B6F00028A106BF578ED21F_label_en-US" xlink:label="lab_colb_CoreDeposits_BAA18EC270B6F00028A106BF578ED21F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Core Deposits</link:label>
    <link:label id="lab_colb_CoreDeposits_BAA18EC270B6F00028A106BF578ED21F_documentation_en-US" xlink:label="lab_colb_CoreDeposits_BAA18EC270B6F00028A106BF578ED21F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Core Deposits</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CoreDeposits" xlink:label="loc_colb_CoreDeposits_BAA18EC270B6F00028A106BF578ED21F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CoreDeposits_BAA18EC270B6F00028A106BF578ED21F" xlink:to="lab_colb_CoreDeposits_BAA18EC270B6F00028A106BF578ED21F" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDeposits100000OrMore_B038BA219B2E4C74B18206BF578E9B05_terseLabel_en-US" xlink:label="lab_us-gaap_TimeDeposits100000OrMore_B038BA219B2E4C74B18206BF578E9B05" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Certificates of deposit greater than $250,000</link:label>
    <link:label id="lab_us-gaap_TimeDeposits100000OrMore_B038BA219B2E4C74B18206BF578E9B05_label_en-US" xlink:label="lab_us-gaap_TimeDeposits100000OrMore_B038BA219B2E4C74B18206BF578E9B05" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Deposits, $100,000 or More</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeDeposits100000OrMore" xlink:label="loc_us-gaap_TimeDeposits100000OrMore_B038BA219B2E4C74B18206BF578E9B05" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDeposits100000OrMore_B038BA219B2E4C74B18206BF578E9B05" xlink:to="lab_us-gaap_TimeDeposits100000OrMore_B038BA219B2E4C74B18206BF578E9B05" xlink:type="arc" />
    <link:label id="lab_colb_CertificatesOfDepositInsuredByCdars_ED2D29863E9F523E1FD006BF578EA3BB_terseLabel_en-US" xlink:label="lab_colb_CertificatesOfDepositInsuredByCdars_ED2D29863E9F523E1FD006BF578EA3BB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Certificates of deposit insured by CDARS&#174;</link:label>
    <link:label id="lab_colb_CertificatesOfDepositInsuredByCdars_ED2D29863E9F523E1FD006BF578EA3BB_label_en-US" xlink:label="lab_colb_CertificatesOfDepositInsuredByCdars_ED2D29863E9F523E1FD006BF578EA3BB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Certificates Of Deposit Insured By CDARS</link:label>
    <link:label id="lab_colb_CertificatesOfDepositInsuredByCdars_ED2D29863E9F523E1FD006BF578EA3BB_documentation_en-US" xlink:label="lab_colb_CertificatesOfDepositInsuredByCdars_ED2D29863E9F523E1FD006BF578EA3BB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Certificates Of Deposit Insured By CDARS</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CertificatesOfDepositInsuredByCdars" xlink:label="loc_colb_CertificatesOfDepositInsuredByCdars_ED2D29863E9F523E1FD006BF578EA3BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CertificatesOfDepositInsuredByCdars_ED2D29863E9F523E1FD006BF578EA3BB" xlink:to="lab_colb_CertificatesOfDepositInsuredByCdars_ED2D29863E9F523E1FD006BF578EA3BB" xlink:type="arc" />
    <link:label id="lab_colb_Otherbrokeredcertificatesofdeposit_5C55C65ABD30E0173ABD06BF578E0237_terseLabel_en-US" xlink:label="lab_colb_Otherbrokeredcertificatesofdeposit_5C55C65ABD30E0173ABD06BF578E0237" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Brokered certificates of deposit</link:label>
    <link:label id="lab_colb_Otherbrokeredcertificatesofdeposit_5C55C65ABD30E0173ABD06BF578E0237_label_en-US" xlink:label="lab_colb_Otherbrokeredcertificatesofdeposit_5C55C65ABD30E0173ABD06BF578E0237" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other brokered certificates of deposit</link:label>
    <link:label id="lab_colb_Otherbrokeredcertificatesofdeposit_5C55C65ABD30E0173ABD06BF578E0237_documentation_en-US" xlink:label="lab_colb_Otherbrokeredcertificatesofdeposit_5C55C65ABD30E0173ABD06BF578E0237" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other brokered certificates of deposit</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Otherbrokeredcertificatesofdeposit" xlink:label="loc_colb_Otherbrokeredcertificatesofdeposit_5C55C65ABD30E0173ABD06BF578E0237" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Otherbrokeredcertificatesofdeposit_5C55C65ABD30E0173ABD06BF578E0237" xlink:to="lab_colb_Otherbrokeredcertificatesofdeposit_5C55C65ABD30E0173ABD06BF578E0237" xlink:type="arc" />
    <link:label id="lab_colb_BrokeredMoneyMarketAccounts_BDEAF80E0E6307CE8DF006BF578E36A6_terseLabel_en-US" xlink:label="lab_colb_BrokeredMoneyMarketAccounts_BDEAF80E0E6307CE8DF006BF578E36A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reciprocal money market accounts</link:label>
    <link:label id="lab_colb_BrokeredMoneyMarketAccounts_BDEAF80E0E6307CE8DF006BF578E36A6_label_en-US" xlink:label="lab_colb_BrokeredMoneyMarketAccounts_BDEAF80E0E6307CE8DF006BF578E36A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Brokered money market accounts</link:label>
    <link:label id="lab_colb_BrokeredMoneyMarketAccounts_BDEAF80E0E6307CE8DF006BF578E36A6_documentation_en-US" xlink:label="lab_colb_BrokeredMoneyMarketAccounts_BDEAF80E0E6307CE8DF006BF578E36A6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Brokered money market accounts</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BrokeredMoneyMarketAccounts" xlink:label="loc_colb_BrokeredMoneyMarketAccounts_BDEAF80E0E6307CE8DF006BF578E36A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BrokeredMoneyMarketAccounts_BDEAF80E0E6307CE8DF006BF578E36A6" xlink:to="lab_colb_BrokeredMoneyMarketAccounts_BDEAF80E0E6307CE8DF006BF578E36A6" xlink:type="arc" />
    <link:label id="lab_colb_CoreAndOtherDeposits_79BED1BB58C47AAF6FB706BF578EF551_totalLabel_en-US" xlink:label="lab_colb_CoreAndOtherDeposits_79BED1BB58C47AAF6FB706BF578EF551" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Subtotal</link:label>
    <link:label id="lab_colb_CoreAndOtherDeposits_79BED1BB58C47AAF6FB706BF578EF551_label_en-US" xlink:label="lab_colb_CoreAndOtherDeposits_79BED1BB58C47AAF6FB706BF578EF551" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Core And Other Deposits</link:label>
    <link:label id="lab_colb_CoreAndOtherDeposits_79BED1BB58C47AAF6FB706BF578EF551_documentation_en-US" xlink:label="lab_colb_CoreAndOtherDeposits_79BED1BB58C47AAF6FB706BF578EF551" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Core And Other Deposits</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CoreAndOtherDeposits" xlink:label="loc_colb_CoreAndOtherDeposits_79BED1BB58C47AAF6FB706BF578EF551" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CoreAndOtherDeposits_79BED1BB58C47AAF6FB706BF578EF551" xlink:to="lab_colb_CoreAndOtherDeposits_79BED1BB58C47AAF6FB706BF578EF551" xlink:type="arc" />
    <link:label id="lab_colb_DepositsValuationAdjustmentFromAcquisitionAccounting_F2B48CD6CB7465DE614B06BF578E9F42_terseLabel_en-US" xlink:label="lab_colb_DepositsValuationAdjustmentFromAcquisitionAccounting_F2B48CD6CB7465DE614B06BF578E9F42" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deposits, Valuation Adjustment From Acquisition Accounting</link:label>
    <link:label id="lab_colb_DepositsValuationAdjustmentFromAcquisitionAccounting_F2B48CD6CB7465DE614B06BF578E9F42_label_en-US" xlink:label="lab_colb_DepositsValuationAdjustmentFromAcquisitionAccounting_F2B48CD6CB7465DE614B06BF578E9F42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposits, Valuation Adjustment From Acquisition Accounting</link:label>
    <link:label id="lab_colb_DepositsValuationAdjustmentFromAcquisitionAccounting_F2B48CD6CB7465DE614B06BF578E9F42_documentation_en-US" xlink:label="lab_colb_DepositsValuationAdjustmentFromAcquisitionAccounting_F2B48CD6CB7465DE614B06BF578E9F42" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deposits, Valuation Adjustment From Acquisition Accounting</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DepositsValuationAdjustmentFromAcquisitionAccounting" xlink:label="loc_colb_DepositsValuationAdjustmentFromAcquisitionAccounting_F2B48CD6CB7465DE614B06BF578E9F42" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DepositsValuationAdjustmentFromAcquisitionAccounting_F2B48CD6CB7465DE614B06BF578E9F42" xlink:to="lab_colb_DepositsValuationAdjustmentFromAcquisitionAccounting_F2B48CD6CB7465DE614B06BF578E9F42" xlink:type="arc" />
    <link:label id="lab_us-gaap_Deposits_F91B08B06931188752F406BF578E6819_totalLabel_en-US" xlink:label="lab_us-gaap_Deposits_F91B08B06931188752F406BF578E6819" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total deposits</link:label>
    <link:label id="lab_us-gaap_Deposits_F91B08B06931188752F406BF578E6819_label_en-US" xlink:label="lab_us-gaap_Deposits_F91B08B06931188752F406BF578E6819" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Deposits" xlink:label="loc_us-gaap_Deposits_F91B08B06931188752F406BF578E6819" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Deposits_F91B08B06931188752F406BF578E6819" xlink:to="lab_us-gaap_Deposits_F91B08B06931188752F406BF578E6819" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1_50055891ED5B4C5BBBB506BF578EFFCB_terseLabel_en-US" xlink:label="lab_us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1_50055891ED5B4C5BBBB506BF578EFFCB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deposit Liabilities Reclassified as Loans Receivable</link:label>
    <link:label id="lab_us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1_50055891ED5B4C5BBBB506BF578EFFCB_label_en-US" xlink:label="lab_us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1_50055891ED5B4C5BBBB506BF578EFFCB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposit Liabilities Reclassified as Loans Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1" xlink:label="loc_us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1_50055891ED5B4C5BBBB506BF578EFFCB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1_50055891ED5B4C5BBBB506BF578EFFCB" xlink:to="lab_us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1_50055891ED5B4C5BBBB506BF578EFFCB" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDepositsByMaturityAbstract_FB5272842250D14F02F706BF578EBA42_label_en-US" xlink:label="lab_us-gaap_TimeDepositsByMaturityAbstract_FB5272842250D14F02F706BF578EBA42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Deposits, Fiscal Year Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeDepositsByMaturityAbstract" xlink:label="loc_us-gaap_TimeDepositsByMaturityAbstract_FB5272842250D14F02F706BF578EBA42" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDepositsByMaturityAbstract_FB5272842250D14F02F706BF578EBA42" xlink:to="lab_us-gaap_TimeDepositsByMaturityAbstract_FB5272842250D14F02F706BF578EBA42" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDepositMaturitiesYearOne_17C52041B109A14C0D4406BF578EFC3D_terseLabel_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesYearOne_17C52041B109A14C0D4406BF578EFC3D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2019</link:label>
    <link:label id="lab_us-gaap_TimeDepositMaturitiesYearOne_17C52041B109A14C0D4406BF578EFC3D_label_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesYearOne_17C52041B109A14C0D4406BF578EFC3D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Deposit Maturities, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeDepositMaturitiesYearOne" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearOne_17C52041B109A14C0D4406BF578EFC3D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDepositMaturitiesYearOne_17C52041B109A14C0D4406BF578EFC3D" xlink:to="lab_us-gaap_TimeDepositMaturitiesYearOne_17C52041B109A14C0D4406BF578EFC3D" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDepositMaturitiesYearTwo_08A8B34F08908575D0F506BF578EEE50_terseLabel_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesYearTwo_08A8B34F08908575D0F506BF578EEE50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
    <link:label id="lab_us-gaap_TimeDepositMaturitiesYearTwo_08A8B34F08908575D0F506BF578EEE50_label_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesYearTwo_08A8B34F08908575D0F506BF578EEE50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Deposit Maturities, Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeDepositMaturitiesYearTwo" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearTwo_08A8B34F08908575D0F506BF578EEE50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDepositMaturitiesYearTwo_08A8B34F08908575D0F506BF578EEE50" xlink:to="lab_us-gaap_TimeDepositMaturitiesYearTwo_08A8B34F08908575D0F506BF578EEE50" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDepositMaturitiesYearThree_36F5A6AE14F8A5DE58EA06BF578E236E_terseLabel_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesYearThree_36F5A6AE14F8A5DE58EA06BF578E236E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_TimeDepositMaturitiesYearThree_36F5A6AE14F8A5DE58EA06BF578E236E_label_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesYearThree_36F5A6AE14F8A5DE58EA06BF578E236E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Deposit Maturities, Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeDepositMaturitiesYearThree" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearThree_36F5A6AE14F8A5DE58EA06BF578E236E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDepositMaturitiesYearThree_36F5A6AE14F8A5DE58EA06BF578E236E" xlink:to="lab_us-gaap_TimeDepositMaturitiesYearThree_36F5A6AE14F8A5DE58EA06BF578E236E" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDepositMaturitiesYearFour_D3A75FA077B74784CCF806BF578E414F_terseLabel_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesYearFour_D3A75FA077B74784CCF806BF578E414F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_TimeDepositMaturitiesYearFour_D3A75FA077B74784CCF806BF578E414F_label_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesYearFour_D3A75FA077B74784CCF806BF578E414F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Deposit Maturities, Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeDepositMaturitiesYearFour" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearFour_D3A75FA077B74784CCF806BF578E414F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDepositMaturitiesYearFour_D3A75FA077B74784CCF806BF578E414F" xlink:to="lab_us-gaap_TimeDepositMaturitiesYearFour_D3A75FA077B74784CCF806BF578E414F" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDepositMaturitiesYearFive_5F8DFCDA8184DC25689306BF578E385F_terseLabel_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesYearFive_5F8DFCDA8184DC25689306BF578E385F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_TimeDepositMaturitiesYearFive_5F8DFCDA8184DC25689306BF578E385F_label_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesYearFive_5F8DFCDA8184DC25689306BF578E385F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Deposit Maturities, Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeDepositMaturitiesYearFive" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearFive_5F8DFCDA8184DC25689306BF578E385F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDepositMaturitiesYearFive_5F8DFCDA8184DC25689306BF578E385F" xlink:to="lab_us-gaap_TimeDepositMaturitiesYearFive_5F8DFCDA8184DC25689306BF578E385F" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDepositMaturitiesAfterYearFive_1E21D43905A249BF19EC06BF578EB7D8_terseLabel_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesAfterYearFive_1E21D43905A249BF19EC06BF578EB7D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Thereafter</link:label>
    <link:label id="lab_us-gaap_TimeDepositMaturitiesAfterYearFive_1E21D43905A249BF19EC06BF578EB7D8_label_en-US" xlink:label="lab_us-gaap_TimeDepositMaturitiesAfterYearFive_1E21D43905A249BF19EC06BF578EB7D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Deposit Maturities, after Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeDepositMaturitiesAfterYearFive" xlink:label="loc_us-gaap_TimeDepositMaturitiesAfterYearFive_1E21D43905A249BF19EC06BF578EB7D8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDepositMaturitiesAfterYearFive_1E21D43905A249BF19EC06BF578EB7D8" xlink:to="lab_us-gaap_TimeDepositMaturitiesAfterYearFive_1E21D43905A249BF19EC06BF578EB7D8" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDeposits_8623AE00275327F6424806BF578E583E_totalLabel_en-US" xlink:label="lab_us-gaap_TimeDeposits_8623AE00275327F6424806BF578E583E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_us-gaap_TimeDeposits_8623AE00275327F6424806BF578E583E_label_en-US" xlink:label="lab_us-gaap_TimeDeposits_8623AE00275327F6424806BF578E583E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Time Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimeDeposits" xlink:label="loc_us-gaap_TimeDeposits_8623AE00275327F6424806BF578E583E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDeposits_8623AE00275327F6424806BF578E583E" xlink:to="lab_us-gaap_TimeDeposits_8623AE00275327F6424806BF578E583E" xlink:type="arc" />
    <link:label id="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_318C7D147867ABE525B60758F92CDD6D_terseLabel_en-US" xlink:label="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_318C7D147867ABE525B60758F92CDD6D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for Loan and Lease Losses and Unfunded Loan Commitments and Letters of Credit</link:label>
    <link:label id="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_318C7D147867ABE525B60758F92CDD6D_label_en-US" xlink:label="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_318C7D147867ABE525B60758F92CDD6D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit Text Block</link:label>
    <link:label id="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_318C7D147867ABE525B60758F92CDD6D_documentation_en-US" xlink:label="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_318C7D147867ABE525B60758F92CDD6D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit [Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock" xlink:label="loc_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_318C7D147867ABE525B60758F92CDD6D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_318C7D147867ABE525B60758F92CDD6D" xlink:to="lab_colb_AllowanceForLoanAndLeaseLossesAndUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_318C7D147867ABE525B60758F92CDD6D" xlink:type="arc" />
    <link:label id="lab_us-gaap_RepurchaseAgreementsResaleAgreementsSecuritiesBorrowedAndSecuritiesLoanedDisclosureTextBlock_32C3BA8DC6F5918A158CC9BBE028CA7B_terseLabel_en-US" xlink:label="lab_us-gaap_RepurchaseAgreementsResaleAgreementsSecuritiesBorrowedAndSecuritiesLoanedDisclosureTextBlock_32C3BA8DC6F5918A158CC9BBE028CA7B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Securities sold under agreements to repurchase</link:label>
    <link:label id="lab_us-gaap_RepurchaseAgreementsResaleAgreementsSecuritiesBorrowedAndSecuritiesLoanedDisclosureTextBlock_32C3BA8DC6F5918A158CC9BBE028CA7B_label_en-US" xlink:label="lab_us-gaap_RepurchaseAgreementsResaleAgreementsSecuritiesBorrowedAndSecuritiesLoanedDisclosureTextBlock_32C3BA8DC6F5918A158CC9BBE028CA7B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RepurchaseAgreementsResaleAgreementsSecuritiesBorrowedAndSecuritiesLoanedDisclosureTextBlock" xlink:label="loc_us-gaap_RepurchaseAgreementsResaleAgreementsSecuritiesBorrowedAndSecuritiesLoanedDisclosureTextBlock_32C3BA8DC6F5918A158CC9BBE028CA7B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepurchaseAgreementsResaleAgreementsSecuritiesBorrowedAndSecuritiesLoanedDisclosureTextBlock_32C3BA8DC6F5918A158CC9BBE028CA7B" xlink:to="lab_us-gaap_RepurchaseAgreementsResaleAgreementsSecuritiesBorrowedAndSecuritiesLoanedDisclosureTextBlock_32C3BA8DC6F5918A158CC9BBE028CA7B" xlink:type="arc" />
    <link:label id="lab_us-gaap_InternalCreditAssessmentAxis_D86EE2FF64F9B8023E475B4F09BDB83E_terseLabel_en-US" xlink:label="lab_us-gaap_InternalCreditAssessmentAxis_D86EE2FF64F9B8023E475B4F09BDB83E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable Information by Credit Quality Indicator [Axis]</link:label>
    <link:label id="lab_us-gaap_InternalCreditAssessmentAxis_D86EE2FF64F9B8023E475B4F09BDB83E_label_en-US" xlink:label="lab_us-gaap_InternalCreditAssessmentAxis_D86EE2FF64F9B8023E475B4F09BDB83E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Internal Credit Assessment [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InternalCreditAssessmentAxis" xlink:label="loc_us-gaap_InternalCreditAssessmentAxis_D86EE2FF64F9B8023E475B4F09BDB83E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_D86EE2FF64F9B8023E475B4F09BDB83E" xlink:to="lab_us-gaap_InternalCreditAssessmentAxis_D86EE2FF64F9B8023E475B4F09BDB83E" xlink:type="arc" />
    <link:label id="lab_us-gaap_InternalCreditAssessmentDomain_15FC7EA3B4004EB777905B4F09BD62B5_terseLabel_en-US" xlink:label="lab_us-gaap_InternalCreditAssessmentDomain_15FC7EA3B4004EB777905B4F09BD62B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, by Credit Quality Indicator [Domain]</link:label>
    <link:label id="lab_us-gaap_InternalCreditAssessmentDomain_15FC7EA3B4004EB777905B4F09BD62B5_label_en-US" xlink:label="lab_us-gaap_InternalCreditAssessmentDomain_15FC7EA3B4004EB777905B4F09BD62B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Internal Credit Assessment [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InternalCreditAssessmentDomain" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_15FC7EA3B4004EB777905B4F09BD62B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_15FC7EA3B4004EB777905B4F09BD62B5" xlink:to="lab_us-gaap_InternalCreditAssessmentDomain_15FC7EA3B4004EB777905B4F09BD62B5" xlink:type="arc" />
    <link:label id="lab_us-gaap_PassMember_A2E3D0423704C13BF9BE5B4F09BD7BEB_terseLabel_en-US" xlink:label="lab_us-gaap_PassMember_A2E3D0423704C13BF9BE5B4F09BD7BEB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pass [Member]</link:label>
    <link:label id="lab_us-gaap_PassMember_A2E3D0423704C13BF9BE5B4F09BD7BEB_label_en-US" xlink:label="lab_us-gaap_PassMember_A2E3D0423704C13BF9BE5B4F09BD7BEB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pass [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PassMember" xlink:label="loc_us-gaap_PassMember_A2E3D0423704C13BF9BE5B4F09BD7BEB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PassMember_A2E3D0423704C13BF9BE5B4F09BD7BEB" xlink:to="lab_us-gaap_PassMember_A2E3D0423704C13BF9BE5B4F09BD7BEB" xlink:type="arc" />
    <link:label id="lab_us-gaap_SpecialMentionMember_2CCF471F4E233A4EF6285B4F09BD2149_terseLabel_en-US" xlink:label="lab_us-gaap_SpecialMentionMember_2CCF471F4E233A4EF6285B4F09BD2149" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Special Mention [Member]</link:label>
    <link:label id="lab_us-gaap_SpecialMentionMember_2CCF471F4E233A4EF6285B4F09BD2149_label_en-US" xlink:label="lab_us-gaap_SpecialMentionMember_2CCF471F4E233A4EF6285B4F09BD2149" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Special Mention [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SpecialMentionMember" xlink:label="loc_us-gaap_SpecialMentionMember_2CCF471F4E233A4EF6285B4F09BD2149" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SpecialMentionMember_2CCF471F4E233A4EF6285B4F09BD2149" xlink:to="lab_us-gaap_SpecialMentionMember_2CCF471F4E233A4EF6285B4F09BD2149" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubstandardMember_0751612548E1A7F043F15B4F09BDC8F5_terseLabel_en-US" xlink:label="lab_us-gaap_SubstandardMember_0751612548E1A7F043F15B4F09BDC8F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Substandard [Member]</link:label>
    <link:label id="lab_us-gaap_SubstandardMember_0751612548E1A7F043F15B4F09BDC8F5_label_en-US" xlink:label="lab_us-gaap_SubstandardMember_0751612548E1A7F043F15B4F09BDC8F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Substandard [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SubstandardMember" xlink:label="loc_us-gaap_SubstandardMember_0751612548E1A7F043F15B4F09BDC8F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubstandardMember_0751612548E1A7F043F15B4F09BDC8F5" xlink:to="lab_us-gaap_SubstandardMember_0751612548E1A7F043F15B4F09BDC8F5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DoubtfulMember_CD8E0FA541AE2737C1325B4F09BD24CB_terseLabel_en-US" xlink:label="lab_us-gaap_DoubtfulMember_CD8E0FA541AE2737C1325B4F09BD24CB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Doubtful [Member]</link:label>
    <link:label id="lab_us-gaap_DoubtfulMember_CD8E0FA541AE2737C1325B4F09BD24CB_label_en-US" xlink:label="lab_us-gaap_DoubtfulMember_CD8E0FA541AE2737C1325B4F09BD24CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Doubtful [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DoubtfulMember" xlink:label="loc_us-gaap_DoubtfulMember_CD8E0FA541AE2737C1325B4F09BD24CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DoubtfulMember_CD8E0FA541AE2737C1325B4F09BD24CB" xlink:to="lab_us-gaap_DoubtfulMember_CD8E0FA541AE2737C1325B4F09BD24CB" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnlikelyToBeCollectedFinancingReceivableMember_83953E13E9213982E4285B4F09BDE685_terseLabel_en-US" xlink:label="lab_us-gaap_UnlikelyToBeCollectedFinancingReceivableMember_83953E13E9213982E4285B4F09BDE685" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unlikely to be Collected Financing Receivable [Member]</link:label>
    <link:label id="lab_us-gaap_UnlikelyToBeCollectedFinancingReceivableMember_83953E13E9213982E4285B4F09BDE685_label_en-US" xlink:label="lab_us-gaap_UnlikelyToBeCollectedFinancingReceivableMember_83953E13E9213982E4285B4F09BDE685" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unlikely to be Collected Financing Receivable [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnlikelyToBeCollectedFinancingReceivableMember" xlink:label="loc_us-gaap_UnlikelyToBeCollectedFinancingReceivableMember_83953E13E9213982E4285B4F09BDE685" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnlikelyToBeCollectedFinancingReceivableMember_83953E13E9213982E4285B4F09BDE685" xlink:to="lab_us-gaap_UnlikelyToBeCollectedFinancingReceivableMember_83953E13E9213982E4285B4F09BDE685" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_A66AF8F8307B4E2C56AD5B4F09BD0AF6_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_A66AF8F8307B4E2C56AD5B4F09BD0AF6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Gross, Carrying Amount</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_A66AF8F8307B4E2C56AD5B4F09BD0AF6_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_A66AF8F8307B4E2C56AD5B4F09BD0AF6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableGrossCarryingAmount" xlink:label="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_A66AF8F8307B4E2C56AD5B4F09BD0AF6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_A66AF8F8307B4E2C56AD5B4F09BD0AF6" xlink:to="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_A66AF8F8307B4E2C56AD5B4F09BD0AF6" xlink:type="arc" />
    <link:label id="lab_colb_AcquisitionAccountingValuationDiscountOnCoveredLoans_BF4A6B5A152869A156535B4F09BD6ABB_terseLabel_en-US" xlink:label="lab_colb_AcquisitionAccountingValuationDiscountOnCoveredLoans_BF4A6B5A152869A156535B4F09BD6ABB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Valuation discount resulting from acquisition accounting</link:label>
    <link:label id="lab_colb_AcquisitionAccountingValuationDiscountOnCoveredLoans_BF4A6B5A152869A156535B4F09BD6ABB_label_en-US" xlink:label="lab_colb_AcquisitionAccountingValuationDiscountOnCoveredLoans_BF4A6B5A152869A156535B4F09BD6ABB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acquisition Accounting Valuation Discount on Covered Loans</link:label>
    <link:label id="lab_colb_AcquisitionAccountingValuationDiscountOnCoveredLoans_BF4A6B5A152869A156535B4F09BD6ABB_documentation_en-US" xlink:label="lab_colb_AcquisitionAccountingValuationDiscountOnCoveredLoans_BF4A6B5A152869A156535B4F09BD6ABB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acquisition Accounting Valuation Discount on Covered Loans</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AcquisitionAccountingValuationDiscountOnCoveredLoans" xlink:label="loc_colb_AcquisitionAccountingValuationDiscountOnCoveredLoans_BF4A6B5A152869A156535B4F09BD6ABB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AcquisitionAccountingValuationDiscountOnCoveredLoans_BF4A6B5A152869A156535B4F09BD6ABB" xlink:to="lab_colb_AcquisitionAccountingValuationDiscountOnCoveredLoans_BF4A6B5A152869A156535B4F09BD6ABB" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowance_25A4FAAF15E094D8EE2A5B4F09BD1500_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowance_25A4FAAF15E094D8EE2A5B4F09BD1500" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Allowance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowance" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowance_25A4FAAF15E094D8EE2A5B4F09BD1500" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowance_25A4FAAF15E094D8EE2A5B4F09BD1500" xlink:to="lab_us-gaap_LoansAndLeasesReceivableAllowance_25A4FAAF15E094D8EE2A5B4F09BD1500" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8335E71B7B699AABF4495B4F09BD0195_totalLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8335E71B7B699AABF4495B4F09BD0195" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Loans, net</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8335E71B7B699AABF4495B4F09BD0195_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8335E71B7B699AABF4495B4F09BD0195" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Net Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetReportedAmount" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8335E71B7B699AABF4495B4F09BD0195" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8335E71B7B699AABF4495B4F09BD0195" xlink:to="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8335E71B7B699AABF4495B4F09BD0195" xlink:type="arc" />
    <link:label id="lab_colb_ImpairedLoansMember_5232AAB468E99BC5A879BA402D3C93D6_terseLabel_en-US" xlink:label="lab_colb_ImpairedLoansMember_5232AAB468E99BC5A879BA402D3C93D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired Loans [Member]</link:label>
    <link:label id="lab_colb_ImpairedLoansMember_5232AAB468E99BC5A879BA402D3C93D6_label_en-US" xlink:label="lab_colb_ImpairedLoansMember_5232AAB468E99BC5A879BA402D3C93D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Loans [Member]</link:label>
    <link:label id="lab_colb_ImpairedLoansMember_5232AAB468E99BC5A879BA402D3C93D6_documentation_en-US" xlink:label="lab_colb_ImpairedLoansMember_5232AAB468E99BC5A879BA402D3C93D6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Impaired Loans [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ImpairedLoansMember" xlink:label="loc_colb_ImpairedLoansMember_5232AAB468E99BC5A879BA402D3C93D6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ImpairedLoansMember_5232AAB468E99BC5A879BA402D3C93D6" xlink:to="lab_colb_ImpairedLoansMember_5232AAB468E99BC5A879BA402D3C93D6" xlink:type="arc" />
    <link:label id="lab_colb_OtherRealEstateOwnedMember_37F026CE2A227FF5665BBA402D3C2F56_terseLabel_en-US" xlink:label="lab_colb_OtherRealEstateOwnedMember_37F026CE2A227FF5665BBA402D3C2F56" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned [Member]</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedMember_37F026CE2A227FF5665BBA402D3C2F56_label_en-US" xlink:label="lab_colb_OtherRealEstateOwnedMember_37F026CE2A227FF5665BBA402D3C2F56" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned [Member]</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedMember_37F026CE2A227FF5665BBA402D3C2F56_documentation_en-US" xlink:label="lab_colb_OtherRealEstateOwnedMember_37F026CE2A227FF5665BBA402D3C2F56" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OtherRealEstateOwnedMember" xlink:label="loc_colb_OtherRealEstateOwnedMember_37F026CE2A227FF5665BBA402D3C2F56" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OtherRealEstateOwnedMember_37F026CE2A227FF5665BBA402D3C2F56" xlink:to="lab_colb_OtherRealEstateOwnedMember_37F026CE2A227FF5665BBA402D3C2F56" xlink:type="arc" />
    <link:label id="lab_colb_ImpairedLoansFinancialAssetsFairValue_4C7075F39B1B2E795892BA402D3EE8CE_terseLabel_en-US" xlink:label="lab_colb_ImpairedLoansFinancialAssetsFairValue_4C7075F39B1B2E795892BA402D3EE8CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired loans</link:label>
    <link:label id="lab_colb_ImpairedLoansFinancialAssetsFairValue_4C7075F39B1B2E795892BA402D3EE8CE_label_en-US" xlink:label="lab_colb_ImpairedLoansFinancialAssetsFairValue_4C7075F39B1B2E795892BA402D3EE8CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Loans, Financial Assets, Fair Value</link:label>
    <link:label id="lab_colb_ImpairedLoansFinancialAssetsFairValue_4C7075F39B1B2E795892BA402D3EE8CE_documentation_en-US" xlink:label="lab_colb_ImpairedLoansFinancialAssetsFairValue_4C7075F39B1B2E795892BA402D3EE8CE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Impaired Loans, Financial Assets, Fair Value</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ImpairedLoansFinancialAssetsFairValue" xlink:label="loc_colb_ImpairedLoansFinancialAssetsFairValue_4C7075F39B1B2E795892BA402D3EE8CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ImpairedLoansFinancialAssetsFairValue_4C7075F39B1B2E795892BA402D3EE8CE" xlink:to="lab_colb_ImpairedLoansFinancialAssetsFairValue_4C7075F39B1B2E795892BA402D3EE8CE" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueOptionChangesInFairValueGainLoss1_298E465178EC0E2B6EB0BA402D3ECF72_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueOptionChangesInFairValueGainLoss1_298E465178EC0E2B6EB0BA402D3ECF72" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Option, Changes in Fair Value, Gain (Loss)</link:label>
    <link:label id="lab_us-gaap_FairValueOptionChangesInFairValueGainLoss1_298E465178EC0E2B6EB0BA402D3ECF72_label_en-US" xlink:label="lab_us-gaap_FairValueOptionChangesInFairValueGainLoss1_298E465178EC0E2B6EB0BA402D3ECF72" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Option, Changes in Fair Value, Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueOptionChangesInFairValueGainLoss1" xlink:label="loc_us-gaap_FairValueOptionChangesInFairValueGainLoss1_298E465178EC0E2B6EB0BA402D3ECF72" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueOptionChangesInFairValueGainLoss1_298E465178EC0E2B6EB0BA402D3ECF72" xlink:to="lab_us-gaap_FairValueOptionChangesInFairValueGainLoss1_298E465178EC0E2B6EB0BA402D3ECF72" xlink:type="arc" />
    <link:label id="lab_colb_OtherRealEstateOwnedFairValue_145763B4AEEAB42007D8BA402D3E2ADE_terseLabel_en-US" xlink:label="lab_colb_OtherRealEstateOwnedFairValue_145763B4AEEAB42007D8BA402D3E2ADE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned Fair Value</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedFairValue_145763B4AEEAB42007D8BA402D3E2ADE_label_en-US" xlink:label="lab_colb_OtherRealEstateOwnedFairValue_145763B4AEEAB42007D8BA402D3E2ADE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned Fair Value</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedFairValue_145763B4AEEAB42007D8BA402D3E2ADE_documentation_en-US" xlink:label="lab_colb_OtherRealEstateOwnedFairValue_145763B4AEEAB42007D8BA402D3E2ADE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned Fair Value</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OtherRealEstateOwnedFairValue" xlink:label="loc_colb_OtherRealEstateOwnedFairValue_145763B4AEEAB42007D8BA402D3E2ADE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OtherRealEstateOwnedFairValue_145763B4AEEAB42007D8BA402D3E2ADE" xlink:to="lab_colb_OtherRealEstateOwnedFairValue_145763B4AEEAB42007D8BA402D3E2ADE" xlink:type="arc" />
    <link:label id="lab_colb_OtherRealEstateOwnedFairValueDisclosure_671B7C97EBF61D55A5F5BA402D3E1CF0_terseLabel_en-US" xlink:label="lab_colb_OtherRealEstateOwnedFairValueDisclosure_671B7C97EBF61D55A5F5BA402D3E1CF0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned, Fair Value Disclosure</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedFairValueDisclosure_671B7C97EBF61D55A5F5BA402D3E1CF0_label_en-US" xlink:label="lab_colb_OtherRealEstateOwnedFairValueDisclosure_671B7C97EBF61D55A5F5BA402D3E1CF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned, Fair Value Disclosure</link:label>
    <link:label id="lab_colb_OtherRealEstateOwnedFairValueDisclosure_671B7C97EBF61D55A5F5BA402D3E1CF0_documentation_en-US" xlink:label="lab_colb_OtherRealEstateOwnedFairValueDisclosure_671B7C97EBF61D55A5F5BA402D3E1CF0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Real Estate Owned, Fair Value Disclosure</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OtherRealEstateOwnedFairValueDisclosure" xlink:label="loc_colb_OtherRealEstateOwnedFairValueDisclosure_671B7C97EBF61D55A5F5BA402D3E1CF0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OtherRealEstateOwnedFairValueDisclosure_671B7C97EBF61D55A5F5BA402D3E1CF0" xlink:to="lab_colb_OtherRealEstateOwnedFairValueDisclosure_671B7C97EBF61D55A5F5BA402D3E1CF0" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsFairValueDisclosure_F711DC0DEA9551F38A40BA402D3E65E3_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosure_F711DC0DEA9551F38A40BA402D3E65E3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets, Fair Value Disclosure</link:label>
    <link:label id="lab_us-gaap_AssetsFairValueDisclosure_F711DC0DEA9551F38A40BA402D3E65E3_label_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosure_F711DC0DEA9551F38A40BA402D3E65E3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Fair Value Disclosure</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_F711DC0DEA9551F38A40BA402D3E65E3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_F711DC0DEA9551F38A40BA402D3E65E3" xlink:to="lab_us-gaap_AssetsFairValueDisclosure_F711DC0DEA9551F38A40BA402D3E65E3" xlink:type="arc" />
    <link:label id="lab_colb_SummaryofOtherRealEstateOwnedTableTextBlock_D49E3397D96D3FE5FB285B4F098E6635_terseLabel_en-US" xlink:label="lab_colb_SummaryofOtherRealEstateOwnedTableTextBlock_D49E3397D96D3FE5FB285B4F098E6635" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of Other Real Estate Owned</link:label>
    <link:label id="lab_colb_SummaryofOtherRealEstateOwnedTableTextBlock_D49E3397D96D3FE5FB285B4F098E6635_label_en-US" xlink:label="lab_colb_SummaryofOtherRealEstateOwnedTableTextBlock_D49E3397D96D3FE5FB285B4F098E6635" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Summary of Other Real Estate Owned [Table Text Block]</link:label>
    <link:label id="lab_colb_SummaryofOtherRealEstateOwnedTableTextBlock_D49E3397D96D3FE5FB285B4F098E6635_documentation_en-US" xlink:label="lab_colb_SummaryofOtherRealEstateOwnedTableTextBlock_D49E3397D96D3FE5FB285B4F098E6635" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Summary of Other Real Estate Owned [Table Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_SummaryofOtherRealEstateOwnedTableTextBlock" xlink:label="loc_colb_SummaryofOtherRealEstateOwnedTableTextBlock_D49E3397D96D3FE5FB285B4F098E6635" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_SummaryofOtherRealEstateOwnedTableTextBlock_D49E3397D96D3FE5FB285B4F098E6635" xlink:to="lab_colb_SummaryofOtherRealEstateOwnedTableTextBlock_D49E3397D96D3FE5FB285B4F098E6635" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTable_BED5DCCE11D4C0FAE037C95C97A2F5F6_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_BED5DCCE11D4C0FAE037C95C97A2F5F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table]</link:label>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTable_BED5DCCE11D4C0FAE037C95C97A2F5F6_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_BED5DCCE11D4C0FAE037C95C97A2F5F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_BED5DCCE11D4C0FAE037C95C97A2F5F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_BED5DCCE11D4C0FAE037C95C97A2F5F6" xlink:to="lab_us-gaap_DisaggregationOfRevenueTable_BED5DCCE11D4C0FAE037C95C97A2F5F6" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_71DE742400813227D0F3C95C97B22B43_terseLabel_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_71DE742400813227D0F3C95C97B22B43" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_71DE742400813227D0F3C95C97B22B43_label_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_71DE742400813227D0F3C95C97B22B43" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_71DE742400813227D0F3C95C97B22B43" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_71DE742400813227D0F3C95C97B22B43" xlink:to="lab_us-gaap_StatementBusinessSegmentsAxis_71DE742400813227D0F3C95C97B22B43" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentDomain_AE867AEC2117585E793DC95C97B2A268_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain_AE867AEC2117585E793DC95C97B2A268" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:label id="lab_us-gaap_SegmentDomain_AE867AEC2117585E793DC95C97B2A268_label_en-US" xlink:label="lab_us-gaap_SegmentDomain_AE867AEC2117585E793DC95C97B2A268" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_AE867AEC2117585E793DC95C97B2A268" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentDomain_AE867AEC2117585E793DC95C97B2A268" xlink:to="lab_us-gaap_SegmentDomain_AE867AEC2117585E793DC95C97B2A268" xlink:type="arc" />
    <link:label id="lab_srt_ProductOrServiceAxis_12D6756B43A6A27BD7EDC95C97B25DD1_terseLabel_en-US" xlink:label="lab_srt_ProductOrServiceAxis_12D6756B43A6A27BD7EDC95C97B25DD1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Product and Service [Axis]</link:label>
    <link:label id="lab_srt_ProductOrServiceAxis_12D6756B43A6A27BD7EDC95C97B25DD1_label_en-US" xlink:label="lab_srt_ProductOrServiceAxis_12D6756B43A6A27BD7EDC95C97B25DD1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Product and Service [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_12D6756B43A6A27BD7EDC95C97B25DD1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductOrServiceAxis_12D6756B43A6A27BD7EDC95C97B25DD1" xlink:to="lab_srt_ProductOrServiceAxis_12D6756B43A6A27BD7EDC95C97B25DD1" xlink:type="arc" />
    <link:label id="lab_srt_ProductsAndServicesDomain_83E1475F0FA33E663DCCC95C97B2F650_terseLabel_en-US" xlink:label="lab_srt_ProductsAndServicesDomain_83E1475F0FA33E663DCCC95C97B2F650" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Product and Service [Domain]</link:label>
    <link:label id="lab_srt_ProductsAndServicesDomain_83E1475F0FA33E663DCCC95C97B2F650_label_en-US" xlink:label="lab_srt_ProductsAndServicesDomain_83E1475F0FA33E663DCCC95C97B2F650" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Product and Service [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_83E1475F0FA33E663DCCC95C97B2F650" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductsAndServicesDomain_83E1475F0FA33E663DCCC95C97B2F650" xlink:to="lab_srt_ProductsAndServicesDomain_83E1475F0FA33E663DCCC95C97B2F650" xlink:type="arc" />
    <link:label id="lab_srt_StatementGeographicalAxis_03B2FDACCEE1CE8BF4E8C95C97B20B69_terseLabel_en-US" xlink:label="lab_srt_StatementGeographicalAxis_03B2FDACCEE1CE8BF4E8C95C97B20B69" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:label id="lab_srt_StatementGeographicalAxis_03B2FDACCEE1CE8BF4E8C95C97B20B69_label_en-US" xlink:label="lab_srt_StatementGeographicalAxis_03B2FDACCEE1CE8BF4E8C95C97B20B69" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_03B2FDACCEE1CE8BF4E8C95C97B20B69" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StatementGeographicalAxis_03B2FDACCEE1CE8BF4E8C95C97B20B69" xlink:to="lab_srt_StatementGeographicalAxis_03B2FDACCEE1CE8BF4E8C95C97B20B69" xlink:type="arc" />
    <link:label id="lab_srt_SegmentGeographicalDomain_258F1B0B61912F2E6F2EC95C97B29667_terseLabel_en-US" xlink:label="lab_srt_SegmentGeographicalDomain_258F1B0B61912F2E6F2EC95C97B29667" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:label id="lab_srt_SegmentGeographicalDomain_258F1B0B61912F2E6F2EC95C97B29667_label_en-US" xlink:label="lab_srt_SegmentGeographicalDomain_258F1B0B61912F2E6F2EC95C97B29667" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_258F1B0B61912F2E6F2EC95C97B29667" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_SegmentGeographicalDomain_258F1B0B61912F2E6F2EC95C97B29667" xlink:to="lab_srt_SegmentGeographicalDomain_258F1B0B61912F2E6F2EC95C97B29667" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerBasisOfPricingAxis_E62430719B065A995582C95C97B2933D_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerBasisOfPricingAxis_E62430719B065A995582C95C97B2933D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract with Customer, Basis of Pricing [Axis]</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerBasisOfPricingAxis_E62430719B065A995582C95C97B2933D_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerBasisOfPricingAxis_E62430719B065A995582C95C97B2933D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Basis of Pricing [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerBasisOfPricingAxis" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_E62430719B065A995582C95C97B2933D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_E62430719B065A995582C95C97B2933D" xlink:to="lab_us-gaap_ContractWithCustomerBasisOfPricingAxis_E62430719B065A995582C95C97B2933D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerBasisOfPricingDomain_AA3B2F8873E9CD13E6A4C95C97B2E599_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerBasisOfPricingDomain_AA3B2F8873E9CD13E6A4C95C97B2E599" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract with Customer, Basis of Pricing [Domain]</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerBasisOfPricingDomain_AA3B2F8873E9CD13E6A4C95C97B2E599_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerBasisOfPricingDomain_AA3B2F8873E9CD13E6A4C95C97B2E599" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Basis of Pricing [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerBasisOfPricingDomain" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_AA3B2F8873E9CD13E6A4C95C97B2E599" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_AA3B2F8873E9CD13E6A4C95C97B2E599" xlink:to="lab_us-gaap_ContractWithCustomerBasisOfPricingDomain_AA3B2F8873E9CD13E6A4C95C97B2E599" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerDurationAxis_81AAA91CD72D006E4C8EC95C97B22236_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerDurationAxis_81AAA91CD72D006E4C8EC95C97B22236" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract with Customer, Duration [Axis]</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerDurationAxis_81AAA91CD72D006E4C8EC95C97B22236_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerDurationAxis_81AAA91CD72D006E4C8EC95C97B22236" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Duration [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerDurationAxis" xlink:label="loc_us-gaap_ContractWithCustomerDurationAxis_81AAA91CD72D006E4C8EC95C97B22236" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerDurationAxis_81AAA91CD72D006E4C8EC95C97B22236" xlink:to="lab_us-gaap_ContractWithCustomerDurationAxis_81AAA91CD72D006E4C8EC95C97B22236" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerDurationDomain_B92E0207E638690868DCC95C97B2012A_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerDurationDomain_B92E0207E638690868DCC95C97B2012A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract with Customer, Duration [Domain]</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerDurationDomain_B92E0207E638690868DCC95C97B2012A_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerDurationDomain_B92E0207E638690868DCC95C97B2012A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Duration [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerDurationDomain" xlink:label="loc_us-gaap_ContractWithCustomerDurationDomain_B92E0207E638690868DCC95C97B2012A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerDurationDomain_B92E0207E638690868DCC95C97B2012A" xlink:to="lab_us-gaap_ContractWithCustomerDurationDomain_B92E0207E638690868DCC95C97B2012A" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimingOfTransferOfGoodOrServiceAxis_D4E66C442778AF3DA352C95C97B2CD0E_terseLabel_en-US" xlink:label="lab_us-gaap_TimingOfTransferOfGoodOrServiceAxis_D4E66C442778AF3DA352C95C97B2CD0E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Timing of Transfer of Good or Service [Axis]</link:label>
    <link:label id="lab_us-gaap_TimingOfTransferOfGoodOrServiceAxis_D4E66C442778AF3DA352C95C97B2CD0E_label_en-US" xlink:label="lab_us-gaap_TimingOfTransferOfGoodOrServiceAxis_D4E66C442778AF3DA352C95C97B2CD0E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Timing of Transfer of Good or Service [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceAxis" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_D4E66C442778AF3DA352C95C97B2CD0E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceAxis_D4E66C442778AF3DA352C95C97B2CD0E" xlink:to="lab_us-gaap_TimingOfTransferOfGoodOrServiceAxis_D4E66C442778AF3DA352C95C97B2CD0E" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9D06017D512AE6B1A3C0C95C97B248D9_terseLabel_en-US" xlink:label="lab_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9D06017D512AE6B1A3C0C95C97B248D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Timing of Transfer of Good or Service [Domain]</link:label>
    <link:label id="lab_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9D06017D512AE6B1A3C0C95C97B248D9_label_en-US" xlink:label="lab_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9D06017D512AE6B1A3C0C95C97B248D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Timing of Transfer of Good or Service [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TimingOfTransferOfGoodOrServiceDomain" xlink:label="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9D06017D512AE6B1A3C0C95C97B248D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9D06017D512AE6B1A3C0C95C97B248D9" xlink:to="lab_us-gaap_TimingOfTransferOfGoodOrServiceDomain_9D06017D512AE6B1A3C0C95C97B248D9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerSalesChannelAxis_4AB82CE571D16EC54FA1C95C97B25BF9_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerSalesChannelAxis_4AB82CE571D16EC54FA1C95C97B25BF9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract with Customer, Sales Channel [Axis]</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerSalesChannelAxis_4AB82CE571D16EC54FA1C95C97B25BF9_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerSalesChannelAxis_4AB82CE571D16EC54FA1C95C97B25BF9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Sales Channel [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelAxis" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelAxis_4AB82CE571D16EC54FA1C95C97B25BF9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_4AB82CE571D16EC54FA1C95C97B25BF9" xlink:to="lab_us-gaap_ContractWithCustomerSalesChannelAxis_4AB82CE571D16EC54FA1C95C97B25BF9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerSalesChannelDomain_DD7A115B2E7B62FCFF7FC95C97B206A7_terseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerSalesChannelDomain_DD7A115B2E7B62FCFF7FC95C97B206A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contract with Customer, Sales Channel [Domain]</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerSalesChannelDomain_DD7A115B2E7B62FCFF7FC95C97B206A7_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerSalesChannelDomain_DD7A115B2E7B62FCFF7FC95C97B206A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Sales Channel [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelDomain" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_DD7A115B2E7B62FCFF7FC95C97B206A7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_DD7A115B2E7B62FCFF7FC95C97B206A7" xlink:to="lab_us-gaap_ContractWithCustomerSalesChannelDomain_DD7A115B2E7B62FCFF7FC95C97B206A7" xlink:type="arc" />
    <link:label id="lab_srt_MajorCustomersAxis_7C3D54A38ACF835584BDC95C97B268C2_terseLabel_en-US" xlink:label="lab_srt_MajorCustomersAxis_7C3D54A38ACF835584BDC95C97B268C2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer [Axis]</link:label>
    <link:label id="lab_srt_MajorCustomersAxis_7C3D54A38ACF835584BDC95C97B268C2_label_en-US" xlink:label="lab_srt_MajorCustomersAxis_7C3D54A38ACF835584BDC95C97B268C2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MajorCustomersAxis" xlink:label="loc_srt_MajorCustomersAxis_7C3D54A38ACF835584BDC95C97B268C2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MajorCustomersAxis_7C3D54A38ACF835584BDC95C97B268C2" xlink:to="lab_srt_MajorCustomersAxis_7C3D54A38ACF835584BDC95C97B268C2" xlink:type="arc" />
    <link:label id="lab_srt_NameOfMajorCustomerDomain_F56E35FB6EE6D72B459CC95C97B2B95B_terseLabel_en-US" xlink:label="lab_srt_NameOfMajorCustomerDomain_F56E35FB6EE6D72B459CC95C97B2B95B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer [Domain]</link:label>
    <link:label id="lab_srt_NameOfMajorCustomerDomain_F56E35FB6EE6D72B459CC95C97B2B95B_label_en-US" xlink:label="lab_srt_NameOfMajorCustomerDomain_F56E35FB6EE6D72B459CC95C97B2B95B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_F56E35FB6EE6D72B459CC95C97B2B95B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_NameOfMajorCustomerDomain_F56E35FB6EE6D72B459CC95C97B2B95B" xlink:to="lab_srt_NameOfMajorCustomerDomain_F56E35FB6EE6D72B459CC95C97B2B95B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisaggregationOfRevenueLineItems_F069C8B7DE535501DEEEC95C97B23F7E_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueLineItems_F069C8B7DE535501DEEEC95C97B23F7E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Line Items]</link:label>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueLineItems_F069C8B7DE535501DEEEC95C97B23F7E_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueLineItems_F069C8B7DE535501DEEEC95C97B23F7E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disaggregation of Revenue [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_F069C8B7DE535501DEEEC95C97B23F7E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_F069C8B7DE535501DEEEC95C97B23F7E" xlink:to="lab_us-gaap_DisaggregationOfRevenueLineItems_F069C8B7DE535501DEEEC95C97B23F7E" xlink:type="arc" />
    <link:label id="lab_colb_Depositaccountandtreasurymanagementfees_F280115009481FB4F76BC95C97B2DC81_terseLabel_en-US" xlink:label="lab_colb_Depositaccountandtreasurymanagementfees_F280115009481FB4F76BC95C97B2DC81" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deposit account and treasury management fees</link:label>
    <link:label id="lab_colb_Depositaccountandtreasurymanagementfees_F280115009481FB4F76BC95C97B2DC81_label_en-US" xlink:label="lab_colb_Depositaccountandtreasurymanagementfees_F280115009481FB4F76BC95C97B2DC81" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposit account and treasury management fees</link:label>
    <link:label id="lab_colb_Depositaccountandtreasurymanagementfees_F280115009481FB4F76BC95C97B2DC81_documentation_en-US" xlink:label="lab_colb_Depositaccountandtreasurymanagementfees_F280115009481FB4F76BC95C97B2DC81" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Includes amounts charged depositors for: (1) maintenance of their accounts (maintenance charges); (2) failure to maintain specified minimum balances on account; (3) exceeding the number of checks or transactions allowed to be processed in a given period; (4) checks drawn on no minimum balance deposit accounts; (5) withdrawals from nontransaction deposit accounts; (6) closing savings accounts before a specified minimum period of time has elapsed; (7) accounts which have remained inactive for extended periods of time or which have become dormant; (8) use of automated teller machines or remote service units; (9) checks drawn against insufficient funds that the bank assesses regardless of whether it decides to pay, return or hold the check; (10) issuing stop payment orders; (11) certifying checks; and (12) accumulating or disbursing funds deposited in IRAs or Keogh Plan accounts when not handled by the bank's trust department.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Depositaccountandtreasurymanagementfees" xlink:label="loc_colb_Depositaccountandtreasurymanagementfees_F280115009481FB4F76BC95C97B2DC81" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Depositaccountandtreasurymanagementfees_F280115009481FB4F76BC95C97B2DC81" xlink:to="lab_colb_Depositaccountandtreasurymanagementfees_F280115009481FB4F76BC95C97B2DC81" xlink:type="arc" />
    <link:label id="lab_colb_Cardrevenue_90F3948567D218ECBDAAC95C97B2431B_terseLabel_en-US" xlink:label="lab_colb_Cardrevenue_90F3948567D218ECBDAAC95C97B2431B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Card revenue</link:label>
    <link:label id="lab_colb_Cardrevenue_90F3948567D218ECBDAAC95C97B2431B_label_en-US" xlink:label="lab_colb_Cardrevenue_90F3948567D218ECBDAAC95C97B2431B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Card revenue</link:label>
    <link:label id="lab_colb_Cardrevenue_90F3948567D218ECBDAAC95C97B2431B_documentation_en-US" xlink:label="lab_colb_Cardrevenue_90F3948567D218ECBDAAC95C97B2431B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income earned from bank card and credit card services including late, over limit, and annual fees. This item excludes interest income earned on credit card balances and transactions. Includes interchange fees earned from bank card and credit card transactions. Also includes ATM and other banking fees.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Cardrevenue" xlink:label="loc_colb_Cardrevenue_90F3948567D218ECBDAAC95C97B2431B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Cardrevenue_90F3948567D218ECBDAAC95C97B2431B" xlink:to="lab_colb_Cardrevenue_90F3948567D218ECBDAAC95C97B2431B" xlink:type="arc" />
    <link:label id="lab_colb_Financialservicesandtrustrevenue_BC3EEBE9F96BF41D79A6C95C97B2070F_terseLabel_en-US" xlink:label="lab_colb_Financialservicesandtrustrevenue_BC3EEBE9F96BF41D79A6C95C97B2070F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial services and trust revenue</link:label>
    <link:label id="lab_colb_Financialservicesandtrustrevenue_BC3EEBE9F96BF41D79A6C95C97B2070F_label_en-US" xlink:label="lab_colb_Financialservicesandtrustrevenue_BC3EEBE9F96BF41D79A6C95C97B2070F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial services and trust revenue</link:label>
    <link:label id="lab_colb_Financialservicesandtrustrevenue_BC3EEBE9F96BF41D79A6C95C97B2070F_documentation_en-US" xlink:label="lab_colb_Financialservicesandtrustrevenue_BC3EEBE9F96BF41D79A6C95C97B2070F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gross income from services rendered by the trust subsidiary, acting in any fiduciary capacity. Also include fees and commissions from the financial services department, including securities brokerage activities, investment advisory and management services.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Financialservicesandtrustrevenue" xlink:label="loc_colb_Financialservicesandtrustrevenue_BC3EEBE9F96BF41D79A6C95C97B2070F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Financialservicesandtrustrevenue_BC3EEBE9F96BF41D79A6C95C97B2070F" xlink:to="lab_colb_Financialservicesandtrustrevenue_BC3EEBE9F96BF41D79A6C95C97B2070F" xlink:type="arc" />
    <link:label id="lab_colb_Revenuefromcontractswithcustomers_CC4B2D1A45BD16A4EEB7C95C97B25C68_terseLabel_en-US" xlink:label="lab_colb_Revenuefromcontractswithcustomers_CC4B2D1A45BD16A4EEB7C95C97B25C68" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue from contracts with customers</link:label>
    <link:label id="lab_colb_Revenuefromcontractswithcustomers_CC4B2D1A45BD16A4EEB7C95C97B25C68_label_en-US" xlink:label="lab_colb_Revenuefromcontractswithcustomers_CC4B2D1A45BD16A4EEB7C95C97B25C68" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from contracts with customers</link:label>
    <link:label id="lab_colb_Revenuefromcontractswithcustomers_CC4B2D1A45BD16A4EEB7C95C97B25C68_documentation_en-US" xlink:label="lab_colb_Revenuefromcontractswithcustomers_CC4B2D1A45BD16A4EEB7C95C97B25C68" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Revenue from contracts with customers</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Revenuefromcontractswithcustomers" xlink:label="loc_colb_Revenuefromcontractswithcustomers_CC4B2D1A45BD16A4EEB7C95C97B25C68" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Revenuefromcontractswithcustomers_CC4B2D1A45BD16A4EEB7C95C97B25C68" xlink:to="lab_colb_Revenuefromcontractswithcustomers_CC4B2D1A45BD16A4EEB7C95C97B25C68" xlink:type="arc" />
    <link:label id="lab_colb_Noninterestincomeexcludingrevenuefromcontractswithcustomers_58C81311BA1E7985DC2AC95C97B219E9_terseLabel_en-US" xlink:label="lab_colb_Noninterestincomeexcludingrevenuefromcontractswithcustomers_58C81311BA1E7985DC2AC95C97B219E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noninterest income, excluding revenue from contracts with customers</link:label>
    <link:label id="lab_colb_Noninterestincomeexcludingrevenuefromcontractswithcustomers_58C81311BA1E7985DC2AC95C97B219E9_label_en-US" xlink:label="lab_colb_Noninterestincomeexcludingrevenuefromcontractswithcustomers_58C81311BA1E7985DC2AC95C97B219E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noninterest income, excluding revenue from contracts with customers</link:label>
    <link:label id="lab_colb_Noninterestincomeexcludingrevenuefromcontractswithcustomers_58C81311BA1E7985DC2AC95C97B219E9_documentation_en-US" xlink:label="lab_colb_Noninterestincomeexcludingrevenuefromcontractswithcustomers_58C81311BA1E7985DC2AC95C97B219E9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Noninterest income, excluding revenue from contracts with customers</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Noninterestincomeexcludingrevenuefromcontractswithcustomers" xlink:label="loc_colb_Noninterestincomeexcludingrevenuefromcontractswithcustomers_58C81311BA1E7985DC2AC95C97B219E9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Noninterestincomeexcludingrevenuefromcontractswithcustomers_58C81311BA1E7985DC2AC95C97B219E9" xlink:to="lab_colb_Noninterestincomeexcludingrevenuefromcontractswithcustomers_58C81311BA1E7985DC2AC95C97B219E9" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_3E400D011D3BC8E16234A54E6E3162BA_negatedTerseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_3E400D011D3BC8E16234A54E6E3162BA" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Junior Subordinated Debentures</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_3E400D011D3BC8E16234A54E6E3162BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_3E400D011D3BC8E16234A54E6E3162BA" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationJuniorSubordinatedDebentures_3E400D011D3BC8E16234A54E6E3162BA" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_89C5A7AED316DD07A061A54E6E3142FA_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_89C5A7AED316DD07A061A54E6E3142FA" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_89C5A7AED316DD07A061A54E6E3142FA_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_89C5A7AED316DD07A061A54E6E3142FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_89C5A7AED316DD07A061A54E6E3142FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_89C5A7AED316DD07A061A54E6E3142FA" xlink:to="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_89C5A7AED316DD07A061A54E6E3142FA" xlink:type="arc" />
    <link:label id="lab_colb_Businesscombinationscoredepositintangiblepercentageofcoredeposits_F74EE4191AF31B11B731A54E6E41CE5F_terseLabel_en-US" xlink:label="lab_colb_Businesscombinationscoredepositintangiblepercentageofcoredeposits_F74EE4191AF31B11B731A54E6E41CE5F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">business combinations, core deposit intangible percentage of core deposits</link:label>
    <link:label id="lab_colb_Businesscombinationscoredepositintangiblepercentageofcoredeposits_F74EE4191AF31B11B731A54E6E41CE5F_label_en-US" xlink:label="lab_colb_Businesscombinationscoredepositintangiblepercentageofcoredeposits_F74EE4191AF31B11B731A54E6E41CE5F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">business combinations, core deposit intangible percentage of core deposits</link:label>
    <link:label id="lab_colb_Businesscombinationscoredepositintangiblepercentageofcoredeposits_F74EE4191AF31B11B731A54E6E41CE5F_documentation_en-US" xlink:label="lab_colb_Businesscombinationscoredepositintangiblepercentageofcoredeposits_F74EE4191AF31B11B731A54E6E41CE5F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">business combinations, core deposit intangible percentage of core deposits</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Businesscombinationscoredepositintangiblepercentageofcoredeposits" xlink:label="loc_colb_Businesscombinationscoredepositintangiblepercentageofcoredeposits_F74EE4191AF31B11B731A54E6E41CE5F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Businesscombinationscoredepositintangiblepercentageofcoredeposits_F74EE4191AF31B11B731A54E6E41CE5F" xlink:to="lab_colb_Businesscombinationscoredepositintangiblepercentageofcoredeposits_F74EE4191AF31B11B731A54E6E41CE5F" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_CAE6116A5C89886FBEC6A54E6E4186E4_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_CAE6116A5C89886FBEC6A54E6E4186E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_CAE6116A5C89886FBEC6A54E6E4186E4_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_CAE6116A5C89886FBEC6A54E6E4186E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_CAE6116A5C89886FBEC6A54E6E4186E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_CAE6116A5C89886FBEC6A54E6E4186E4" xlink:to="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_CAE6116A5C89886FBEC6A54E6E4186E4" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_1A78B773EA8E97B44F22A54E6E41C979_terseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_1A78B773EA8E97B44F22A54E6E41C979" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Purchase Price Allocation, Liabilities, Deposits</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_1A78B773EA8E97B44F22A54E6E41C979" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_1A78B773EA8E97B44F22A54E6E41C979" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationLiabilitiesDeposits_1A78B773EA8E97B44F22A54E6E41C979" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_4FA7A4910CA332CD6B5CA54E6E41FBD5_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_4FA7A4910CA332CD6B5CA54E6E41FBD5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Acquisition, Percentage of Voting Interests Acquired</link:label>
    <link:label id="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_4FA7A4910CA332CD6B5CA54E6E41FBD5_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_4FA7A4910CA332CD6B5CA54E6E41FBD5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Acquisition, Percentage of Voting Interests Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_4FA7A4910CA332CD6B5CA54E6E41FBD5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_4FA7A4910CA332CD6B5CA54E6E41FBD5" xlink:to="lab_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_4FA7A4910CA332CD6B5CA54E6E41FBD5" xlink:type="arc" />
    <link:label id="lab_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_270ED337E7546BFF3013A54E6E41038E_negatedTerseLabel_en-US" xlink:label="lab_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_270ED337E7546BFF3013A54E6E41038E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Purchase Price Allocation, Federal Home Loan bank advances</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances" xlink:label="loc_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_270ED337E7546BFF3013A54E6E41038E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_270ED337E7546BFF3013A54E6E41038E" xlink:to="lab_colb_BusinessCombinationPurchasePriceAllocationFederalHomeLoanbankadvances_270ED337E7546BFF3013A54E6E41038E" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_8124B8C479F0247426645B4F098EAAAF_terseLabel_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_8124B8C479F0247426645B4F098EAAAF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allocated Share-based Compensation Expense</link:label>
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_8124B8C479F0247426645B4F098EAAAF_label_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_8124B8C479F0247426645B4F098EAAAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allocated Share-based Compensation Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_8124B8C479F0247426645B4F098EAAAF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpense_8124B8C479F0247426645B4F098EAAAF" xlink:to="lab_us-gaap_AllocatedShareBasedCompensationExpense_8124B8C479F0247426645B4F098EAAAF" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9EE57F6AB65C7F593EB35B4F098EFDF7_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9EE57F6AB65C7F593EB35B4F098EFDF7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based compensation, number authorized (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9EE57F6AB65C7F593EB35B4F098EFDF7_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9EE57F6AB65C7F593EB35B4F098EFDF7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9EE57F6AB65C7F593EB35B4F098EFDF7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9EE57F6AB65C7F593EB35B4F098EFDF7" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9EE57F6AB65C7F593EB35B4F098EFDF7" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_D71538DE2BD60AAA1CC45B4F098E322E_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_D71538DE2BD60AAA1CC45B4F098E322E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_D71538DE2BD60AAA1CC45B4F098E322E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_D71538DE2BD60AAA1CC45B4F098E322E" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_D71538DE2BD60AAA1CC45B4F098E322E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4018F03E9923AE9708F85B4F098E3667_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4018F03E9923AE9708F85B4F098E3667" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4018F03E9923AE9708F85B4F098E3667_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4018F03E9923AE9708F85B4F098E3667" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4018F03E9923AE9708F85B4F098E3667" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4018F03E9923AE9708F85B4F098E3667" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4018F03E9923AE9708F85B4F098E3667" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8C4EB3D00BFDC97607935B4F098E3376_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8C4EB3D00BFDC97607935B4F098E3376" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8C4EB3D00BFDC97607935B4F098E3376_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8C4EB3D00BFDC97607935B4F098E3376" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8C4EB3D00BFDC97607935B4F098E3376" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8C4EB3D00BFDC97607935B4F098E3376" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8C4EB3D00BFDC97607935B4F098E3376" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_89A411B1AF461DFA1F3E5B4F098E4B32_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_89A411B1AF461DFA1F3E5B4F098E4B32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_89A411B1AF461DFA1F3E5B4F098E4B32_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_89A411B1AF461DFA1F3E5B4F098E4B32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_89A411B1AF461DFA1F3E5B4F098E4B32" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_89A411B1AF461DFA1F3E5B4F098E4B32" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_89A411B1AF461DFA1F3E5B4F098E4B32" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_AABD83885241FBCB8FF55B4F098ECBE7_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_AABD83885241FBCB8FF55B4F098ECBE7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_AABD83885241FBCB8FF55B4F098ECBE7_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_AABD83885241FBCB8FF55B4F098ECBE7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_AABD83885241FBCB8FF55B4F098ECBE7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_AABD83885241FBCB8FF55B4F098ECBE7" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_AABD83885241FBCB8FF55B4F098ECBE7" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6A5252B044A8E8C9AA045B4F098EE0A6_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6A5252B044A8E8C9AA045B4F098EE0A6" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6A5252B044A8E8C9AA045B4F098EE0A6_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6A5252B044A8E8C9AA045B4F098EE0A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6A5252B044A8E8C9AA045B4F098EE0A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6A5252B044A8E8C9AA045B4F098EE0A6" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6A5252B044A8E8C9AA045B4F098EE0A6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5F654C0E0F93751AA7A55B4F098E3AB6_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5F654C0E0F93751AA7A55B4F098E3AB6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5F654C0E0F93751AA7A55B4F098E3AB6_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5F654C0E0F93751AA7A55B4F098E3AB6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5F654C0E0F93751AA7A55B4F098E3AB6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5F654C0E0F93751AA7A55B4F098E3AB6" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_5F654C0E0F93751AA7A55B4F098E3AB6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_912C2E89785C5D18D4F45B4F098EF6FB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_912C2E89785C5D18D4F45B4F098EF6FB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_912C2E89785C5D18D4F45B4F098EF6FB_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_912C2E89785C5D18D4F45B4F098EF6FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_912C2E89785C5D18D4F45B4F098EF6FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_912C2E89785C5D18D4F45B4F098EF6FB" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_912C2E89785C5D18D4F45B4F098EF6FB" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_D0E836AA4F2B8B8CC0605B4F098E133C_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_D0E836AA4F2B8B8CC0605B4F098E133C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_D0E836AA4F2B8B8CC0605B4F098E133C_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_D0E836AA4F2B8B8CC0605B4F098E133C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_D0E836AA4F2B8B8CC0605B4F098E133C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_D0E836AA4F2B8B8CC0605B4F098E133C" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_D0E836AA4F2B8B8CC0605B4F098E133C" xlink:type="arc" />
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4F2E964E091BD7BDE1935B4F098ED984_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4F2E964E091BD7BDE1935B4F098ED984" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized</link:label>
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4F2E964E091BD7BDE1935B4F098ED984_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4F2E964E091BD7BDE1935B4F098ED984" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4F2E964E091BD7BDE1935B4F098ED984" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4F2E964E091BD7BDE1935B4F098ED984" xlink:to="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_4F2E964E091BD7BDE1935B4F098ED984" xlink:type="arc" />
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_AF664C3C0B126DE4B9E85B4F098E5198_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_AF664C3C0B126DE4B9E85B4F098E5198" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition</link:label>
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_AF664C3C0B126DE4B9E85B4F098E5198_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_AF664C3C0B126DE4B9E85B4F098E5198" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_AF664C3C0B126DE4B9E85B4F098E5198" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_AF664C3C0B126DE4B9E85B4F098E5198" xlink:to="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_AF664C3C0B126DE4B9E85B4F098E5198" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D69E450FB0A0293E77785B4F098EA008_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D69E450FB0A0293E77785B4F098EA008" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D69E450FB0A0293E77785B4F098EA008_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D69E450FB0A0293E77785B4F098EA008" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D69E450FB0A0293E77785B4F098EA008" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D69E450FB0A0293E77785B4F098EA008" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_D69E450FB0A0293E77785B4F098EA008" xlink:type="arc" />
    <link:label id="lab_colb_ReceivablesPurchasedCreditImpairedLoansAbstract_28BF71ADD6E3A1BA82CB5B4F099E5E8C_label_en-US" xlink:label="lab_colb_ReceivablesPurchasedCreditImpairedLoansAbstract_28BF71ADD6E3A1BA82CB5B4F099E5E8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivables, Purchased Credit Impaired Loans [Abstract]</link:label>
    <link:label id="lab_colb_ReceivablesPurchasedCreditImpairedLoansAbstract_28BF71ADD6E3A1BA82CB5B4F099E5E8C_documentation_en-US" xlink:label="lab_colb_ReceivablesPurchasedCreditImpairedLoansAbstract_28BF71ADD6E3A1BA82CB5B4F099E5E8C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Receivables, Purchased Credit Impaired Loans [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ReceivablesPurchasedCreditImpairedLoansAbstract" xlink:label="loc_colb_ReceivablesPurchasedCreditImpairedLoansAbstract_28BF71ADD6E3A1BA82CB5B4F099E5E8C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ReceivablesPurchasedCreditImpairedLoansAbstract_28BF71ADD6E3A1BA82CB5B4F099E5E8C" xlink:to="lab_colb_ReceivablesPurchasedCreditImpairedLoansAbstract_28BF71ADD6E3A1BA82CB5B4F099E5E8C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3F8DA1A6AF0D168E43215B4F099E6F27_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3F8DA1A6AF0D168E43215B4F099E6F27" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Industry of Counterparty, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3F8DA1A6AF0D168E43215B4F099E6F27_label_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3F8DA1A6AF0D168E43215B4F099E6F27" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Industry of Counterparty, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3F8DA1A6AF0D168E43215B4F099E6F27" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3F8DA1A6AF0D168E43215B4F099E6F27" xlink:to="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByIndustryOfCounterpartyTypeAxis_3F8DA1A6AF0D168E43215B4F099E6F27" xlink:type="arc" />
    <link:label id="lab_us-gaap_IndustryOfCounterpartyDomain_D8703D4F58FD579D9EAA5B4F099E9478_terseLabel_en-US" xlink:label="lab_us-gaap_IndustryOfCounterpartyDomain_D8703D4F58FD579D9EAA5B4F099E9478" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Industry of Counterparty [Domain]</link:label>
    <link:label id="lab_us-gaap_IndustryOfCounterpartyDomain_D8703D4F58FD579D9EAA5B4F099E9478_label_en-US" xlink:label="lab_us-gaap_IndustryOfCounterpartyDomain_D8703D4F58FD579D9EAA5B4F099E9478" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Industry of Counterparty [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IndustryOfCounterpartyDomain" xlink:label="loc_us-gaap_IndustryOfCounterpartyDomain_D8703D4F58FD579D9EAA5B4F099E9478" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IndustryOfCounterpartyDomain_D8703D4F58FD579D9EAA5B4F099E9478" xlink:to="lab_us-gaap_IndustryOfCounterpartyDomain_D8703D4F58FD579D9EAA5B4F099E9478" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_2FD9018B766C1483FAF35B4F099E7E90_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_2FD9018B766C1483FAF35B4F099E7E90" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal Entity of Counterparty, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_2FD9018B766C1483FAF35B4F099E7E90_label_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_2FD9018B766C1483FAF35B4F099E7E90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legal Entity of Counterparty, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_2FD9018B766C1483FAF35B4F099E7E90" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_2FD9018B766C1483FAF35B4F099E7E90" xlink:to="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis_2FD9018B766C1483FAF35B4F099E7E90" xlink:type="arc" />
    <link:label id="lab_us-gaap_LegalEntityTypeOfCounterpartyDomain_F8A2FB7B22F48C53DE115B4F099E4BE4_terseLabel_en-US" xlink:label="lab_us-gaap_LegalEntityTypeOfCounterpartyDomain_F8A2FB7B22F48C53DE115B4F099E4BE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal Entity Type of Counterparty [Domain]</link:label>
    <link:label id="lab_us-gaap_LegalEntityTypeOfCounterpartyDomain_F8A2FB7B22F48C53DE115B4F099E4BE4_label_en-US" xlink:label="lab_us-gaap_LegalEntityTypeOfCounterpartyDomain_F8A2FB7B22F48C53DE115B4F099E4BE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Legal Entity Type of Counterparty [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LegalEntityTypeOfCounterpartyDomain" xlink:label="loc_us-gaap_LegalEntityTypeOfCounterpartyDomain_F8A2FB7B22F48C53DE115B4F099E4BE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LegalEntityTypeOfCounterpartyDomain_F8A2FB7B22F48C53DE115B4F099E4BE4" xlink:to="lab_us-gaap_LegalEntityTypeOfCounterpartyDomain_F8A2FB7B22F48C53DE115B4F099E4BE4" xlink:type="arc" />
    <link:label id="lab_srt_CounterpartyNameAxis_9EF0F349603E38A575655B4F099E8B24_terseLabel_en-US" xlink:label="lab_srt_CounterpartyNameAxis_9EF0F349603E38A575655B4F099E8B24" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Name [Axis]</link:label>
    <link:label id="lab_srt_CounterpartyNameAxis_9EF0F349603E38A575655B4F099E8B24_label_en-US" xlink:label="lab_srt_CounterpartyNameAxis_9EF0F349603E38A575655B4F099E8B24" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Name [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_CounterpartyNameAxis" xlink:label="loc_srt_CounterpartyNameAxis_9EF0F349603E38A575655B4F099E8B24" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_CounterpartyNameAxis_9EF0F349603E38A575655B4F099E8B24" xlink:to="lab_srt_CounterpartyNameAxis_9EF0F349603E38A575655B4F099E8B24" xlink:type="arc" />
    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_5A01CBE6C12EC53BF75A5B4F099EBE57_terseLabel_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain_5A01CBE6C12EC53BF75A5B4F099EBE57" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:label id="lab_srt_RepurchaseAgreementCounterpartyNameDomain_5A01CBE6C12EC53BF75A5B4F099EBE57_label_en-US" xlink:label="lab_srt_RepurchaseAgreementCounterpartyNameDomain_5A01CBE6C12EC53BF75A5B4F099EBE57" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Counterparty Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_5A01CBE6C12EC53BF75A5B4F099EBE57" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_5A01CBE6C12EC53BF75A5B4F099EBE57" xlink:to="lab_srt_RepurchaseAgreementCounterpartyNameDomain_5A01CBE6C12EC53BF75A5B4F099EBE57" xlink:type="arc" />
    <link:label id="lab_srt_ConsolidationItemsAxis_0C7CEBBA9AE4745A58EF5B4F099EC293_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsAxis_0C7CEBBA9AE4745A58EF5B4F099EC293" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:label id="lab_srt_ConsolidationItemsAxis_0C7CEBBA9AE4745A58EF5B4F099EC293_label_en-US" xlink:label="lab_srt_ConsolidationItemsAxis_0C7CEBBA9AE4745A58EF5B4F099EC293" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation Items [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsAxis" xlink:label="loc_srt_ConsolidationItemsAxis_0C7CEBBA9AE4745A58EF5B4F099EC293" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsAxis_0C7CEBBA9AE4745A58EF5B4F099EC293" xlink:to="lab_srt_ConsolidationItemsAxis_0C7CEBBA9AE4745A58EF5B4F099EC293" xlink:type="arc" />
    <link:label id="lab_srt_ConsolidationItemsDomain_354298F259D9D137304D5B4F099EC837_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsDomain_354298F259D9D137304D5B4F099EC837" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:label id="lab_srt_ConsolidationItemsDomain_354298F259D9D137304D5B4F099EC837_label_en-US" xlink:label="lab_srt_ConsolidationItemsDomain_354298F259D9D137304D5B4F099EC837" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation Items [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_ConsolidationItemsDomain" xlink:label="loc_srt_ConsolidationItemsDomain_354298F259D9D137304D5B4F099EC837" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsDomain_354298F259D9D137304D5B4F099EC837" xlink:to="lab_srt_ConsolidationItemsDomain_354298F259D9D137304D5B4F099EC837" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9E8590D0A4704F905A995B4F099EF962_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9E8590D0A4704F905A995B4F099EF962" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Billing Status, Type [Axis]</link:label>
    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9E8590D0A4704F905A995B4F099EF962_label_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9E8590D0A4704F905A995B4F099EF962" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Billing Status, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9E8590D0A4704F905A995B4F099EF962" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9E8590D0A4704F905A995B4F099EF962" xlink:to="lab_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_9E8590D0A4704F905A995B4F099EF962" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReceivablesBillingStatusDomain_861F7B9090C83148B4EB5B4F099EB5C9_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivablesBillingStatusDomain_861F7B9090C83148B4EB5B4F099EB5C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivables Billing Status [Domain]</link:label>
    <link:label id="lab_us-gaap_ReceivablesBillingStatusDomain_861F7B9090C83148B4EB5B4F099EB5C9_label_en-US" xlink:label="lab_us-gaap_ReceivablesBillingStatusDomain_861F7B9090C83148B4EB5B4F099EB5C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivables Billing Status [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivablesBillingStatusDomain" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_861F7B9090C83148B4EB5B4F099EB5C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivablesBillingStatusDomain_861F7B9090C83148B4EB5B4F099EB5C9" xlink:to="lab_us-gaap_ReceivablesBillingStatusDomain_861F7B9090C83148B4EB5B4F099EB5C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_D16017949097950DB73E5B4F099EF7B9_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_D16017949097950DB73E5B4F099EF7B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivable Type [Axis]</link:label>
    <link:label id="lab_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_D16017949097950DB73E5B4F099EF7B9_label_en-US" xlink:label="lab_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_D16017949097950DB73E5B4F099EF7B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivable Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_D16017949097950DB73E5B4F099EF7B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_D16017949097950DB73E5B4F099EF7B9" xlink:to="lab_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_D16017949097950DB73E5B4F099EF7B9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReceivableTypeDomain_D70785AC1A5E1E937A795B4F099E41BA_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivableTypeDomain_D70785AC1A5E1E937A795B4F099E41BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivable [Domain]</link:label>
    <link:label id="lab_us-gaap_ReceivableTypeDomain_D70785AC1A5E1E937A795B4F099E41BA_label_en-US" xlink:label="lab_us-gaap_ReceivableTypeDomain_D70785AC1A5E1E937A795B4F099E41BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivable [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivableTypeDomain" xlink:label="loc_us-gaap_ReceivableTypeDomain_D70785AC1A5E1E937A795B4F099E41BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivableTypeDomain_D70785AC1A5E1E937A795B4F099E41BA" xlink:to="lab_us-gaap_ReceivableTypeDomain_D70785AC1A5E1E937A795B4F099E41BA" xlink:type="arc" />
    <link:label id="lab_colb_CommercialAndMultifamilyResidentialMember_47E3FF363EFBBDAE827E5B4F099ED0DC_terseLabel_en-US" xlink:label="lab_colb_CommercialAndMultifamilyResidentialMember_47E3FF363EFBBDAE827E5B4F099ED0DC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial and Multifamily Residential [Member]</link:label>
    <link:label id="lab_colb_CommercialAndMultifamilyResidentialMember_47E3FF363EFBBDAE827E5B4F099ED0DC_label_en-US" xlink:label="lab_colb_CommercialAndMultifamilyResidentialMember_47E3FF363EFBBDAE827E5B4F099ED0DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial and Multifamily Residential [Member]</link:label>
    <link:label id="lab_colb_CommercialAndMultifamilyResidentialMember_47E3FF363EFBBDAE827E5B4F099ED0DC_documentation_en-US" xlink:label="lab_colb_CommercialAndMultifamilyResidentialMember_47E3FF363EFBBDAE827E5B4F099ED0DC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Commercial and Multifamily Residential [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommercialAndMultifamilyResidentialMember" xlink:label="loc_colb_CommercialAndMultifamilyResidentialMember_47E3FF363EFBBDAE827E5B4F099ED0DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommercialAndMultifamilyResidentialMember_47E3FF363EFBBDAE827E5B4F099ED0DC" xlink:to="lab_colb_CommercialAndMultifamilyResidentialMember_47E3FF363EFBBDAE827E5B4F099ED0DC" xlink:type="arc" />
    <link:label id="lab_colb_OnetoFourFamilyResidentialConstructionDomain_C165F4563F6F9300793B5B4F099EBCA5_terseLabel_en-US" xlink:label="lab_colb_OnetoFourFamilyResidentialConstructionDomain_C165F4563F6F9300793B5B4F099EBCA5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">One-to-Four Family Residential Construction [Member]</link:label>
    <link:label id="lab_colb_OnetoFourFamilyResidentialConstructionDomain_C165F4563F6F9300793B5B4F099EBCA5_label_en-US" xlink:label="lab_colb_OnetoFourFamilyResidentialConstructionDomain_C165F4563F6F9300793B5B4F099EBCA5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">One-to-Four Family Residential Construction [Domain]</link:label>
    <link:label id="lab_colb_OnetoFourFamilyResidentialConstructionDomain_C165F4563F6F9300793B5B4F099EBCA5_documentation_en-US" xlink:label="lab_colb_OnetoFourFamilyResidentialConstructionDomain_C165F4563F6F9300793B5B4F099EBCA5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One-to-Four Family Residential Construction</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_OnetoFourFamilyResidentialConstructionDomain" xlink:label="loc_colb_OnetoFourFamilyResidentialConstructionDomain_C165F4563F6F9300793B5B4F099EBCA5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_OnetoFourFamilyResidentialConstructionDomain_C165F4563F6F9300793B5B4F099EBCA5" xlink:to="lab_colb_OnetoFourFamilyResidentialConstructionDomain_C165F4563F6F9300793B5B4F099EBCA5" xlink:type="arc" />
    <link:label id="lab_colb_CommercialandMultifamilyResidentialConstructionDomain_67075A35B131CD021CA65B4F099E4B9D_terseLabel_en-US" xlink:label="lab_colb_CommercialandMultifamilyResidentialConstructionDomain_67075A35B131CD021CA65B4F099E4B9D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial and Multifamily Residential Construction [Member]</link:label>
    <link:label id="lab_colb_CommercialandMultifamilyResidentialConstructionDomain_67075A35B131CD021CA65B4F099E4B9D_label_en-US" xlink:label="lab_colb_CommercialandMultifamilyResidentialConstructionDomain_67075A35B131CD021CA65B4F099E4B9D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial and Multifamily Residential Construction [Domain]</link:label>
    <link:label id="lab_colb_CommercialandMultifamilyResidentialConstructionDomain_67075A35B131CD021CA65B4F099E4B9D_documentation_en-US" xlink:label="lab_colb_CommercialandMultifamilyResidentialConstructionDomain_67075A35B131CD021CA65B4F099E4B9D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Commercial and Multifamily Residential Construction</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommercialandMultifamilyResidentialConstructionDomain" xlink:label="loc_colb_CommercialandMultifamilyResidentialConstructionDomain_67075A35B131CD021CA65B4F099E4B9D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommercialandMultifamilyResidentialConstructionDomain_67075A35B131CD021CA65B4F099E4B9D" xlink:to="lab_colb_CommercialandMultifamilyResidentialConstructionDomain_67075A35B131CD021CA65B4F099E4B9D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_8D675E760DA1A9181BB55B4F099E1ACB_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_8D675E760DA1A9181BB55B4F099E1ACB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Benchmark [Axis]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_8D675E760DA1A9181BB55B4F099E1ACB_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_8D675E760DA1A9181BB55B4F099E1ACB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Benchmark [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_8D675E760DA1A9181BB55B4F099E1ACB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_8D675E760DA1A9181BB55B4F099E1ACB" xlink:to="lab_us-gaap_ConcentrationRiskByBenchmarkAxis_8D675E760DA1A9181BB55B4F099E1ACB" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConcentrationRiskBenchmarkDomain_5637BA12495F12D4AC185B4F099E1690_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskBenchmarkDomain_5637BA12495F12D4AC185B4F099E1690" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Benchmark [Domain]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskBenchmarkDomain_5637BA12495F12D4AC185B4F099E1690_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskBenchmarkDomain_5637BA12495F12D4AC185B4F099E1690" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Benchmark [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5637BA12495F12D4AC185B4F099E1690" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5637BA12495F12D4AC185B4F099E1690" xlink:to="lab_us-gaap_ConcentrationRiskBenchmarkDomain_5637BA12495F12D4AC185B4F099E1690" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A189FFFC6D888F0E9B535B4F09AEBF4A_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A189FFFC6D888F0E9B535B4F09AEBF4A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Net Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetReportedAmount" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A189FFFC6D888F0E9B535B4F09AEBF4A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A189FFFC6D888F0E9B535B4F09AEBF4A" xlink:to="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A189FFFC6D888F0E9B535B4F09AEBF4A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_0D9D0992259374B6692F06BF57020938_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_0D9D0992259374B6692F06BF57020938" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_0D9D0992259374B6692F06BF57020938" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_0D9D0992259374B6692F06BF57020938" xlink:to="lab_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_0D9D0992259374B6692F06BF57020938" xlink:type="arc" />
    <link:label id="lab_colb_EmployeeBenefitAxis_7302B88A9FBCF5C8878D06BF570275BB_terseLabel_en-US" xlink:label="lab_colb_EmployeeBenefitAxis_7302B88A9FBCF5C8878D06BF570275BB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee Benefit [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_EmployeeBenefitAxis" xlink:label="loc_colb_EmployeeBenefitAxis_7302B88A9FBCF5C8878D06BF570275BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_EmployeeBenefitAxis_7302B88A9FBCF5C8878D06BF570275BB" xlink:to="lab_colb_EmployeeBenefitAxis_7302B88A9FBCF5C8878D06BF570275BB" xlink:type="arc" />
    <link:label id="lab_colb_EmployeeBenefitDomain_0A9C2E2220812ADE291806BF5702B815_terseLabel_en-US" xlink:label="lab_colb_EmployeeBenefitDomain_0A9C2E2220812ADE291806BF5702B815" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee Benefit [Domain]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_EmployeeBenefitDomain" xlink:label="loc_colb_EmployeeBenefitDomain_0A9C2E2220812ADE291806BF5702B815" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_EmployeeBenefitDomain_0A9C2E2220812ADE291806BF5702B815" xlink:to="lab_colb_EmployeeBenefitDomain_0A9C2E2220812ADE291806BF5702B815" xlink:type="arc" />
    <link:label id="lab_us-gaap_PensionPlansDefinedBenefitMember_867177E9837E3224D6B506BF5702718A_label_en-US" xlink:label="lab_us-gaap_PensionPlansDefinedBenefitMember_867177E9837E3224D6B506BF5702718A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pension Plan [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_867177E9837E3224D6B506BF5702718A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PensionPlansDefinedBenefitMember_867177E9837E3224D6B506BF5702718A" xlink:to="lab_us-gaap_PensionPlansDefinedBenefitMember_867177E9837E3224D6B506BF5702718A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredProfitSharingMember_0A1B077BD5CC8BCF8E2606BF570227E4_label_en-US" xlink:label="lab_us-gaap_DeferredProfitSharingMember_0A1B077BD5CC8BCF8E2606BF570227E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Profit Sharing [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredProfitSharingMember" xlink:label="loc_us-gaap_DeferredProfitSharingMember_0A1B077BD5CC8BCF8E2606BF570227E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredProfitSharingMember_0A1B077BD5CC8BCF8E2606BF570227E4" xlink:to="lab_us-gaap_DeferredProfitSharingMember_0A1B077BD5CC8BCF8E2606BF570227E4" xlink:type="arc" />
    <link:label id="lab_us-gaap_EmployeeStockMember_439955139C653600428106BF5702578A_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeStockMember_439955139C653600428106BF5702578A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ESP Plan [Member]</link:label>
    <link:label id="lab_us-gaap_EmployeeStockMember_439955139C653600428106BF5702578A_label_en-US" xlink:label="lab_us-gaap_EmployeeStockMember_439955139C653600428106BF5702578A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_439955139C653600428106BF5702578A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeStockMember_439955139C653600428106BF5702578A" xlink:to="lab_us-gaap_EmployeeStockMember_439955139C653600428106BF5702578A" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_5C5FE5ED825209139F0A06BF57029DF3_terseLabel_en-US" xlink:label="lab_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_5C5FE5ED825209139F0A06BF57029DF3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unit Plans [Member]</link:label>
    <link:label id="lab_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_5C5FE5ED825209139F0A06BF57029DF3_label_en-US" xlink:label="lab_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_5C5FE5ED825209139F0A06BF57029DF3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Pension, Postretirement and Supplemental Plans [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_5C5FE5ED825209139F0A06BF57029DF3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_5C5FE5ED825209139F0A06BF57029DF3" xlink:to="lab_us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember_5C5FE5ED825209139F0A06BF57029DF3" xlink:type="arc" />
    <link:label id="lab_srt_MinimumMember_6A03E58E204CC60CBABF06BF57024CC4_label_en-US" xlink:label="lab_srt_MinimumMember_6A03E58E204CC60CBABF06BF57024CC4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_6A03E58E204CC60CBABF06BF57024CC4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MinimumMember_6A03E58E204CC60CBABF06BF57024CC4" xlink:to="lab_srt_MinimumMember_6A03E58E204CC60CBABF06BF57024CC4" xlink:type="arc" />
    <link:label id="lab_colb_EmployeeBenefitLineItems_104FD56F5C833C8D53C306BF5702FB33_terseLabel_en-US" xlink:label="lab_colb_EmployeeBenefitLineItems_104FD56F5C833C8D53C306BF5702FB33" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee Benefit [Line Items]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_EmployeeBenefitLineItems" xlink:label="loc_colb_EmployeeBenefitLineItems_104FD56F5C833C8D53C306BF5702FB33" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_EmployeeBenefitLineItems_104FD56F5C833C8D53C306BF5702FB33" xlink:to="lab_colb_EmployeeBenefitLineItems_104FD56F5C833C8D53C306BF5702FB33" xlink:type="arc" />
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualEligibleAge_5E6834E7115E20042E5406BF5702044A_label_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualEligibleAge_5E6834E7115E20042E5406BF5702044A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Eligible Age</link:label>
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualEligibleAge_5E6834E7115E20042E5406BF5702044A_documentation_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualEligibleAge_5E6834E7115E20042E5406BF5702044A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Eligible Age</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DeferredCompensationArrangementWithIndividualEligibleAge" xlink:label="loc_colb_DeferredCompensationArrangementWithIndividualEligibleAge_5E6834E7115E20042E5406BF5702044A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DeferredCompensationArrangementWithIndividualEligibleAge_5E6834E7115E20042E5406BF5702044A" xlink:to="lab_colb_DeferredCompensationArrangementWithIndividualEligibleAge_5E6834E7115E20042E5406BF5702044A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1_82E5DB5AA02B47D69CAE06BF5702C1CE_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1_82E5DB5AA02B47D69CAE06BF5702C1CE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Requisite Service Period</link:label>
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1_82E5DB5AA02B47D69CAE06BF5702C1CE_label_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1_82E5DB5AA02B47D69CAE06BF5702C1CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Requisite Service Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1_82E5DB5AA02B47D69CAE06BF5702C1CE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1_82E5DB5AA02B47D69CAE06BF5702C1CE" xlink:to="lab_us-gaap_DeferredCompensationArrangementWithIndividualRequisiteServicePeriod1_82E5DB5AA02B47D69CAE06BF5702C1CE" xlink:type="arc" />
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualContributionToPlanByEmployeePercentOfEligibleCompensation_933E26A0A6DB6DF0D88206BF5702AF3C_label_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualContributionToPlanByEmployeePercentOfEligibleCompensation_933E26A0A6DB6DF0D88206BF5702AF3C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Contribution To Plan By Employee, Percent Of Eligible Compensation</link:label>
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualContributionToPlanByEmployeePercentOfEligibleCompensation_933E26A0A6DB6DF0D88206BF5702AF3C_documentation_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualContributionToPlanByEmployeePercentOfEligibleCompensation_933E26A0A6DB6DF0D88206BF5702AF3C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Contribution To Plan By Employee, Percent Of Eligible Compensation</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DeferredCompensationArrangementWithIndividualContributionToPlanByEmployeePercentOfEligibleCompensation" xlink:label="loc_colb_DeferredCompensationArrangementWithIndividualContributionToPlanByEmployeePercentOfEligibleCompensation_933E26A0A6DB6DF0D88206BF5702AF3C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DeferredCompensationArrangementWithIndividualContributionToPlanByEmployeePercentOfEligibleCompensation_933E26A0A6DB6DF0D88206BF5702AF3C" xlink:to="lab_colb_DeferredCompensationArrangementWithIndividualContributionToPlanByEmployeePercentOfEligibleCompensation_933E26A0A6DB6DF0D88206BF5702AF3C" xlink:type="arc" />
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsMatchingPercent_F92FB78882314E7C34F406BF5702ABAF_label_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsMatchingPercent_F92FB78882314E7C34F406BF5702ABAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Contribution Requirements, Matching Percent</link:label>
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsMatchingPercent_F92FB78882314E7C34F406BF5702ABAF_documentation_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsMatchingPercent_F92FB78882314E7C34F406BF5702ABAF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Contribution Requirements, Matching Percent</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DeferredCompensationArrangementWithIndividualContributionRequirementsMatchingPercent" xlink:label="loc_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsMatchingPercent_F92FB78882314E7C34F406BF5702ABAF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsMatchingPercent_F92FB78882314E7C34F406BF5702ABAF" xlink:to="lab_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsMatchingPercent_F92FB78882314E7C34F406BF5702ABAF" xlink:type="arc" />
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsPercentOfEachEmployeeCompensation_62A9C9DB111E2516D1D306BF5702C8C5_label_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsPercentOfEachEmployeeCompensation_62A9C9DB111E2516D1D306BF5702C8C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Contribution Requirements, Percent Of Each Employee Compensation</link:label>
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsPercentOfEachEmployeeCompensation_62A9C9DB111E2516D1D306BF5702C8C5_documentation_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsPercentOfEachEmployeeCompensation_62A9C9DB111E2516D1D306BF5702C8C5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Contribution Requirements, Percent Of Each Employee Compensation</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DeferredCompensationArrangementWithIndividualContributionRequirementsPercentOfEachEmployeeCompensation" xlink:label="loc_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsPercentOfEachEmployeeCompensation_62A9C9DB111E2516D1D306BF5702C8C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsPercentOfEachEmployeeCompensation_62A9C9DB111E2516D1D306BF5702C8C5" xlink:to="lab_colb_DeferredCompensationArrangementWithIndividualContributionRequirementsPercentOfEachEmployeeCompensation_62A9C9DB111E2516D1D306BF5702C8C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A0141F45CFF060976CC606BF570281C3_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A0141F45CFF060976CC606BF570281C3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Contributions by Employer</link:label>
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A0141F45CFF060976CC606BF570281C3_label_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A0141F45CFF060976CC606BF570281C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Contributions by Employer</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A0141F45CFF060976CC606BF570281C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A0141F45CFF060976CC606BF570281C3" xlink:to="lab_us-gaap_DeferredCompensationArrangementWithIndividualContributionsByEmployer_A0141F45CFF060976CC606BF570281C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_3E245C5B1576394148A006BF5702728D_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_3E245C5B1576394148A006BF5702728D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_3E245C5B1576394148A006BF5702728D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_3E245C5B1576394148A006BF5702728D" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_3E245C5B1576394148A006BF5702728D" xlink:type="arc" />
    <link:label id="lab_colb_NumberOfLookBackPeriodUnderEmployeeStockPurchasePlan_9EB99A1F1BEB7949C4B806BF570281FA_terseLabel_en-US" xlink:label="lab_colb_NumberOfLookBackPeriodUnderEmployeeStockPurchasePlan_9EB99A1F1BEB7949C4B806BF570281FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of Look-back Period Under Employee Stock Purchase Plan</link:label>
    <link:label id="lab_colb_NumberOfLookBackPeriodUnderEmployeeStockPurchasePlan_9EB99A1F1BEB7949C4B806BF570281FA_label_en-US" xlink:label="lab_colb_NumberOfLookBackPeriodUnderEmployeeStockPurchasePlan_9EB99A1F1BEB7949C4B806BF570281FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Look-back Period Under Employee Stock Purchase Plan</link:label>
    <link:label id="lab_colb_NumberOfLookBackPeriodUnderEmployeeStockPurchasePlan_9EB99A1F1BEB7949C4B806BF570281FA_documentation_en-US" xlink:label="lab_colb_NumberOfLookBackPeriodUnderEmployeeStockPurchasePlan_9EB99A1F1BEB7949C4B806BF570281FA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of Look-back Period Under Employee Stock Purchase Plan</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_NumberOfLookBackPeriodUnderEmployeeStockPurchasePlan" xlink:label="loc_colb_NumberOfLookBackPeriodUnderEmployeeStockPurchasePlan_9EB99A1F1BEB7949C4B806BF570281FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_NumberOfLookBackPeriodUnderEmployeeStockPurchasePlan_9EB99A1F1BEB7949C4B806BF570281FA" xlink:to="lab_colb_NumberOfLookBackPeriodUnderEmployeeStockPurchasePlan_9EB99A1F1BEB7949C4B806BF570281FA" xlink:type="arc" />
    <link:label id="lab_colb_LookBackPeriodUnderEmployeeStockPurchasePlan_520ACD084E3388E357A306BF57020F9B_terseLabel_en-US" xlink:label="lab_colb_LookBackPeriodUnderEmployeeStockPurchasePlan_520ACD084E3388E357A306BF57020F9B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Look-back Period Under Employee Stock Purchase Plan</link:label>
    <link:label id="lab_colb_LookBackPeriodUnderEmployeeStockPurchasePlan_520ACD084E3388E357A306BF57020F9B_label_en-US" xlink:label="lab_colb_LookBackPeriodUnderEmployeeStockPurchasePlan_520ACD084E3388E357A306BF57020F9B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Look-back Period Under Employee Stock Purchase Plan</link:label>
    <link:label id="lab_colb_LookBackPeriodUnderEmployeeStockPurchasePlan_520ACD084E3388E357A306BF57020F9B_documentation_en-US" xlink:label="lab_colb_LookBackPeriodUnderEmployeeStockPurchasePlan_520ACD084E3388E357A306BF57020F9B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Look-back Period Under Employee Stock Purchase Plan</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LookBackPeriodUnderEmployeeStockPurchasePlan" xlink:label="loc_colb_LookBackPeriodUnderEmployeeStockPurchasePlan_520ACD084E3388E357A306BF57020F9B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LookBackPeriodUnderEmployeeStockPurchasePlan_520ACD084E3388E357A306BF57020F9B" xlink:to="lab_colb_LookBackPeriodUnderEmployeeStockPurchasePlan_520ACD084E3388E357A306BF57020F9B" xlink:type="arc" />
    <link:label id="lab_colb_DiscountOnCommonStockUnderEmployeeStockPurchasePlanPercent_36D6F1CE90F5B6662D4606BF57029366_label_en-US" xlink:label="lab_colb_DiscountOnCommonStockUnderEmployeeStockPurchasePlanPercent_36D6F1CE90F5B6662D4606BF57029366" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Discount On Common Stock Under Employee Stock Purchase Plan, Percent</link:label>
    <link:label id="lab_colb_DiscountOnCommonStockUnderEmployeeStockPurchasePlanPercent_36D6F1CE90F5B6662D4606BF57029366_documentation_en-US" xlink:label="lab_colb_DiscountOnCommonStockUnderEmployeeStockPurchasePlanPercent_36D6F1CE90F5B6662D4606BF57029366" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Discount On Common Stock Under Employee Stock Purchase Plan, Percent</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DiscountOnCommonStockUnderEmployeeStockPurchasePlanPercent" xlink:label="loc_colb_DiscountOnCommonStockUnderEmployeeStockPurchasePlanPercent_36D6F1CE90F5B6662D4606BF57029366" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DiscountOnCommonStockUnderEmployeeStockPurchasePlanPercent_36D6F1CE90F5B6662D4606BF57029366" xlink:to="lab_colb_DiscountOnCommonStockUnderEmployeeStockPurchasePlanPercent_36D6F1CE90F5B6662D4606BF57029366" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_B012CEB4B776EDAF531C06BF5702B314_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_B012CEB4B776EDAF531C06BF5702B314" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Employee Stock Purchase Plans</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_B012CEB4B776EDAF531C06BF5702B314_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_B012CEB4B776EDAF531C06BF5702B314" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Shares, Employee Stock Purchase Plans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_B012CEB4B776EDAF531C06BF5702B314" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_B012CEB4B776EDAF531C06BF5702B314" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_B012CEB4B776EDAF531C06BF5702B314" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_3192DA4B6F208273785006BF570230AD_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_3192DA4B6F208273785006BF570230AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Employee Stock Purchase Plan</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_3192DA4B6F208273785006BF570230AD_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_3192DA4B6F208273785006BF570230AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued During Period, Value, Employee Stock Purchase Plan</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_3192DA4B6F208273785006BF570230AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_3192DA4B6F208273785006BF570230AD" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_3192DA4B6F208273785006BF570230AD" xlink:type="arc" />
    <link:label id="lab_colb_SharesAvailableForPurchaseUnderEmployeeStockPurchasePlan_A611D63A4217EC1C1BB106BF57020E61_label_en-US" xlink:label="lab_colb_SharesAvailableForPurchaseUnderEmployeeStockPurchasePlan_A611D63A4217EC1C1BB106BF57020E61" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares Available For Purchase Under Employee Stock Purchase Plan</link:label>
    <link:label id="lab_colb_SharesAvailableForPurchaseUnderEmployeeStockPurchasePlan_A611D63A4217EC1C1BB106BF57020E61_documentation_en-US" xlink:label="lab_colb_SharesAvailableForPurchaseUnderEmployeeStockPurchasePlan_A611D63A4217EC1C1BB106BF57020E61" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Shares Available For Purchase Under Employee Stock Purchase Plan</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_SharesAvailableForPurchaseUnderEmployeeStockPurchasePlan" xlink:label="loc_colb_SharesAvailableForPurchaseUnderEmployeeStockPurchasePlan_A611D63A4217EC1C1BB106BF57020E61" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_SharesAvailableForPurchaseUnderEmployeeStockPurchasePlan_A611D63A4217EC1C1BB106BF57020E61" xlink:to="lab_colb_SharesAvailableForPurchaseUnderEmployeeStockPurchasePlan_A611D63A4217EC1C1BB106BF57020E61" xlink:type="arc" />
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualVestingPeriod_C986E1588F9FB78EB79A06BF5702BA79_label_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualVestingPeriod_C986E1588F9FB78EB79A06BF5702BA79" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Vesting Period</link:label>
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualVestingPeriod_C986E1588F9FB78EB79A06BF5702BA79_documentation_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualVestingPeriod_C986E1588F9FB78EB79A06BF5702BA79" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Vesting Period</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DeferredCompensationArrangementWithIndividualVestingPeriod" xlink:label="loc_colb_DeferredCompensationArrangementWithIndividualVestingPeriod_C986E1588F9FB78EB79A06BF5702BA79" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DeferredCompensationArrangementWithIndividualVestingPeriod_C986E1588F9FB78EB79A06BF5702BA79" xlink:to="lab_colb_DeferredCompensationArrangementWithIndividualVestingPeriod_C986E1588F9FB78EB79A06BF5702BA79" xlink:type="arc" />
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualBenefitPeriod_61A3DF912C56AE5B214E06BF570226D2_label_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualBenefitPeriod_61A3DF912C56AE5B214E06BF570226D2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Benefit Period</link:label>
    <link:label id="lab_colb_DeferredCompensationArrangementWithIndividualBenefitPeriod_61A3DF912C56AE5B214E06BF570226D2_documentation_en-US" xlink:label="lab_colb_DeferredCompensationArrangementWithIndividualBenefitPeriod_61A3DF912C56AE5B214E06BF570226D2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Benefit Period</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DeferredCompensationArrangementWithIndividualBenefitPeriod" xlink:label="loc_colb_DeferredCompensationArrangementWithIndividualBenefitPeriod_61A3DF912C56AE5B214E06BF570226D2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DeferredCompensationArrangementWithIndividualBenefitPeriod_61A3DF912C56AE5B214E06BF570226D2" xlink:to="lab_colb_DeferredCompensationArrangementWithIndividualBenefitPeriod_61A3DF912C56AE5B214E06BF570226D2" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_4031EA5456B005705E9B06BF570256CF_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_4031EA5456B005705E9B06BF570256CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Recorded Liability</link:label>
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_4031EA5456B005705E9B06BF570256CF_label_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_4031EA5456B005705E9B06BF570256CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Recorded Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_4031EA5456B005705E9B06BF570256CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_4031EA5456B005705E9B06BF570256CF" xlink:to="lab_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_4031EA5456B005705E9B06BF570256CF" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_83AAAB6A80990A28434D06BF5702A6F8_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_83AAAB6A80990A28434D06BF5702A6F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Compensation Expense</link:label>
    <link:label id="lab_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_83AAAB6A80990A28434D06BF5702A6F8_label_en-US" xlink:label="lab_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_83AAAB6A80990A28434D06BF5702A6F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Compensation Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_83AAAB6A80990A28434D06BF5702A6F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_83AAAB6A80990A28434D06BF5702A6F8" xlink:to="lab_us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_83AAAB6A80990A28434D06BF5702A6F8" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_422BEA6EE26AA081A32E06BF57029881_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_422BEA6EE26AA081A32E06BF57029881" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_422BEA6EE26AA081A32E06BF57029881_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_422BEA6EE26AA081A32E06BF57029881" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_422BEA6EE26AA081A32E06BF57029881" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_422BEA6EE26AA081A32E06BF57029881" xlink:to="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_422BEA6EE26AA081A32E06BF57029881" xlink:type="arc" />
    <link:label id="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNormalRetirementAge_07D506F5FD0BC08512D906BF57024F21_terseLabel_en-US" xlink:label="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNormalRetirementAge_07D506F5FD0BC08512D906BF57024F21" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Normal Retirement Age</link:label>
    <link:label id="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNormalRetirementAge_07D506F5FD0BC08512D906BF57024F21_label_en-US" xlink:label="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNormalRetirementAge_07D506F5FD0BC08512D906BF57024F21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Normal Retirement Age</link:label>
    <link:label id="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNormalRetirementAge_07D506F5FD0BC08512D906BF57024F21_documentation_en-US" xlink:label="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNormalRetirementAge_07D506F5FD0BC08512D906BF57024F21" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Normal Retirement Age</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNormalRetirementAge" xlink:label="loc_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNormalRetirementAge_07D506F5FD0BC08512D906BF57024F21" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNormalRetirementAge_07D506F5FD0BC08512D906BF57024F21" xlink:to="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationNormalRetirementAge_07D506F5FD0BC08512D906BF57024F21" xlink:type="arc" />
    <link:label id="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationAnnualCostOfLivingBenefitAdjustment_A79A103A2473464D812206BF5702201E_terseLabel_en-US" xlink:label="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationAnnualCostOfLivingBenefitAdjustment_A79A103A2473464D812206BF5702201E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Annual Cost Of Living Benefit Adjustment</link:label>
    <link:label id="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationAnnualCostOfLivingBenefitAdjustment_A79A103A2473464D812206BF5702201E_label_en-US" xlink:label="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationAnnualCostOfLivingBenefitAdjustment_A79A103A2473464D812206BF5702201E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Annual Cost Of Living Benefit Adjustment</link:label>
    <link:label id="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationAnnualCostOfLivingBenefitAdjustment_A79A103A2473464D812206BF5702201E_documentation_en-US" xlink:label="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationAnnualCostOfLivingBenefitAdjustment_A79A103A2473464D812206BF5702201E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Annual Cost Of Living Benefit Adjustment</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationAnnualCostOfLivingBenefitAdjustment" xlink:label="loc_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationAnnualCostOfLivingBenefitAdjustment_A79A103A2473464D812206BF5702201E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationAnnualCostOfLivingBenefitAdjustment_A79A103A2473464D812206BF5702201E" xlink:to="lab_colb_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationAnnualCostOfLivingBenefitAdjustment_A79A103A2473464D812206BF5702201E" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_F539C3F9025B0121471F06BF57029562_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_F539C3F9025B0121471F06BF57029562" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_F539C3F9025B0121471F06BF57029562" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_F539C3F9025B0121471F06BF57029562" xlink:to="lab_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_F539C3F9025B0121471F06BF57029562" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligation_7EEF991C2F3268FCF73606BF57028455_periodStartLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligation_7EEF991C2F3268FCF73606BF57028455" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance at beginning of year</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligation_7EEF991C2F3268FCF73606BF57028455_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligation_7EEF991C2F3268FCF73606BF57028455" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_7EEF991C2F3268FCF73606BF57028455" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanBenefitObligation_7EEF991C2F3268FCF73606BF57028455" xlink:to="lab_us-gaap_DefinedBenefitPlanBenefitObligation_7EEF991C2F3268FCF73606BF57028455" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanActuarialGainLoss_CF25D0BB586728F5530C06BF5702242C_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanActuarialGainLoss_CF25D0BB586728F5530C06BF5702242C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in actuarial loss</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanActuarialGainLoss_CF25D0BB586728F5530C06BF5702242C_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanActuarialGainLoss_CF25D0BB586728F5530C06BF5702242C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_CF25D0BB586728F5530C06BF5702242C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_CF25D0BB586728F5530C06BF5702242C" xlink:to="lab_us-gaap_DefinedBenefitPlanActuarialGainLoss_CF25D0BB586728F5530C06BF5702242C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanPlanAmendments_A8B89C03350AE81A548F06BF5702FFC9_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanPlanAmendments_A8B89C03350AE81A548F06BF5702FFC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanPlanAmendments_A8B89C03350AE81A548F06BF5702FFC9_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanPlanAmendments_A8B89C03350AE81A548F06BF5702FFC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAmendments" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAmendments_A8B89C03350AE81A548F06BF5702FFC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanPlanAmendments_A8B89C03350AE81A548F06BF5702FFC9" xlink:to="lab_us-gaap_DefinedBenefitPlanPlanAmendments_A8B89C03350AE81A548F06BF5702FFC9" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_FEC121DEDA68C7BA74C706BF5712833E_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_FEC121DEDA68C7BA74C706BF5712833E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Benefit expense</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_FEC121DEDA68C7BA74C706BF5712833E_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_FEC121DEDA68C7BA74C706BF5712833E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Net Periodic Benefit Cost (Credit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_FEC121DEDA68C7BA74C706BF5712833E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_FEC121DEDA68C7BA74C706BF5712833E" xlink:to="lab_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_FEC121DEDA68C7BA74C706BF5712833E" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_BE67AC504B738B9741A106BF5712AF63_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_BE67AC504B738B9741A106BF5712AF63" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation, Benefits Paid</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_BE67AC504B738B9741A106BF5712AF63_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_BE67AC504B738B9741A106BF5712AF63" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Benefit Obligation, Benefits Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_BE67AC504B738B9741A106BF5712AF63" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_BE67AC504B738B9741A106BF5712AF63" xlink:to="lab_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_BE67AC504B738B9741A106BF5712AF63" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanBenefitObligation_75E844DBD7202F4956DE06BF5712C06F_periodEndLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanBenefitObligation_75E844DBD7202F4956DE06BF5712C06F" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance at end of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_75E844DBD7202F4956DE06BF5712C06F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanBenefitObligation_75E844DBD7202F4956DE06BF5712C06F" xlink:to="lab_us-gaap_DefinedBenefitPlanBenefitObligation_75E844DBD7202F4956DE06BF5712C06F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_6A26015983D8C6BC89B406BF57126EE1_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_6A26015983D8C6BC89B406BF57126EE1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_6A26015983D8C6BC89B406BF57126EE1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_6A26015983D8C6BC89B406BF57126EE1" xlink:to="lab_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_6A26015983D8C6BC89B406BF57126EE1" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_F8B23B93AB2A43AD81AF06BF5712D603_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_F8B23B93AB2A43AD81AF06BF5712D603" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2019</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_F8B23B93AB2A43AD81AF06BF5712D603_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_F8B23B93AB2A43AD81AF06BF5712D603" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_F8B23B93AB2A43AD81AF06BF5712D603" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_F8B23B93AB2A43AD81AF06BF5712D603" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_F8B23B93AB2A43AD81AF06BF5712D603" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_A9076F785159016B55EB06BF57129F0F_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_A9076F785159016B55EB06BF57129F0F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_A9076F785159016B55EB06BF57129F0F_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_A9076F785159016B55EB06BF57129F0F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_A9076F785159016B55EB06BF57129F0F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_A9076F785159016B55EB06BF57129F0F" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_A9076F785159016B55EB06BF57129F0F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_F25B6E4422560DA3415106BF5712FDA7_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_F25B6E4422560DA3415106BF5712FDA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_F25B6E4422560DA3415106BF5712FDA7_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_F25B6E4422560DA3415106BF5712FDA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_F25B6E4422560DA3415106BF5712FDA7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_F25B6E4422560DA3415106BF5712FDA7" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_F25B6E4422560DA3415106BF5712FDA7" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_75145C69DCFE0E235A8506BF571249F8_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_75145C69DCFE0E235A8506BF571249F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_75145C69DCFE0E235A8506BF571249F8_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_75145C69DCFE0E235A8506BF571249F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_75145C69DCFE0E235A8506BF571249F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_75145C69DCFE0E235A8506BF571249F8" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_75145C69DCFE0E235A8506BF571249F8" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_3A5CC5A9BF7D4F2DDADB06BF571264BC_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_3A5CC5A9BF7D4F2DDADB06BF571264BC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_3A5CC5A9BF7D4F2DDADB06BF571264BC_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_3A5CC5A9BF7D4F2DDADB06BF571264BC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_3A5CC5A9BF7D4F2DDADB06BF571264BC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_3A5CC5A9BF7D4F2DDADB06BF571264BC" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_3A5CC5A9BF7D4F2DDADB06BF571264BC" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_996EEB3EFC6BF63C5E0206BF57124E0C_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_996EEB3EFC6BF63C5E0206BF57124E0C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2024 through 2028</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_996EEB3EFC6BF63C5E0206BF57124E0C_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_996EEB3EFC6BF63C5E0206BF57124E0C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_996EEB3EFC6BF63C5E0206BF57124E0C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_996EEB3EFC6BF63C5E0206BF57124E0C" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_996EEB3EFC6BF63C5E0206BF57124E0C" xlink:type="arc" />
    <link:label id="lab_colb_DefinedBenefitPlanExpectedFutureBenefitPayments_21B8F63FD581D141FAC106BF57122600_totalLabel_en-US" xlink:label="lab_colb_DefinedBenefitPlanExpectedFutureBenefitPayments_21B8F63FD581D141FAC106BF57122600" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_colb_DefinedBenefitPlanExpectedFutureBenefitPayments_21B8F63FD581D141FAC106BF57122600_label_en-US" xlink:label="lab_colb_DefinedBenefitPlanExpectedFutureBenefitPayments_21B8F63FD581D141FAC106BF57122600" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payments</link:label>
    <link:label id="lab_colb_DefinedBenefitPlanExpectedFutureBenefitPayments_21B8F63FD581D141FAC106BF57122600_documentation_en-US" xlink:label="lab_colb_DefinedBenefitPlanExpectedFutureBenefitPayments_21B8F63FD581D141FAC106BF57122600" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payments</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DefinedBenefitPlanExpectedFutureBenefitPayments" xlink:label="loc_colb_DefinedBenefitPlanExpectedFutureBenefitPayments_21B8F63FD581D141FAC106BF57122600" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DefinedBenefitPlanExpectedFutureBenefitPayments_21B8F63FD581D141FAC106BF57122600" xlink:to="lab_colb_DefinedBenefitPlanExpectedFutureBenefitPayments_21B8F63FD581D141FAC106BF57122600" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_A2022D17BB43C7AEADACA625E854CF61_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_A2022D17BB43C7AEADACA625E854CF61" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_A2022D17BB43C7AEADACA625E854CF61_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_A2022D17BB43C7AEADACA625E854CF61" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_A2022D17BB43C7AEADACA625E854CF61" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_A2022D17BB43C7AEADACA625E854CF61" xlink:to="lab_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_A2022D17BB43C7AEADACA625E854CF61" xlink:type="arc" />
    <link:label id="lab_us-gaap_AwardTypeAxis_9838528BD299D27BDFF8A625E855FBA4_terseLabel_en-US" xlink:label="lab_us-gaap_AwardTypeAxis_9838528BD299D27BDFF8A625E855FBA4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis]</link:label>
    <link:label id="lab_us-gaap_AwardTypeAxis_9838528BD299D27BDFF8A625E855FBA4_label_en-US" xlink:label="lab_us-gaap_AwardTypeAxis_9838528BD299D27BDFF8A625E855FBA4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Award Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_9838528BD299D27BDFF8A625E855FBA4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AwardTypeAxis_9838528BD299D27BDFF8A625E855FBA4" xlink:to="lab_us-gaap_AwardTypeAxis_9838528BD299D27BDFF8A625E855FBA4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FD73A6546ACC78C89CC7A625E8555330_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FD73A6546ACC78C89CC7A625E8555330" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain]</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FD73A6546ACC78C89CC7A625E8555330_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FD73A6546ACC78C89CC7A625E8555330" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Award [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FD73A6546ACC78C89CC7A625E8555330" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FD73A6546ACC78C89CC7A625E8555330" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FD73A6546ACC78C89CC7A625E8555330" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockOptionMember_B12A44EAC8A46D5CC618A625E8552348_terseLabel_en-US" xlink:label="lab_us-gaap_StockOptionMember_B12A44EAC8A46D5CC618A625E8552348" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock Option [Member]</link:label>
    <link:label id="lab_us-gaap_StockOptionMember_B12A44EAC8A46D5CC618A625E8552348_label_en-US" xlink:label="lab_us-gaap_StockOptionMember_B12A44EAC8A46D5CC618A625E8552348" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Option [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockOptionMember" xlink:label="loc_us-gaap_StockOptionMember_B12A44EAC8A46D5CC618A625E8552348" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockOptionMember_B12A44EAC8A46D5CC618A625E8552348" xlink:to="lab_us-gaap_StockOptionMember_B12A44EAC8A46D5CC618A625E8552348" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_B20781AFF0B1599A1ACAA625E8554BF6_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_B20781AFF0B1599A1ACAA625E8554BF6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Exercise Price Range [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_B20781AFF0B1599A1ACAA625E8554BF6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_B20781AFF0B1599A1ACAA625E8554BF6" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_B20781AFF0B1599A1ACAA625E8554BF6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_2645E971A7A026CACF6AA625E8569CE8_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_2645E971A7A026CACF6AA625E8569CE8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_2645E971A7A026CACF6AA625E8569CE8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_2645E971A7A026CACF6AA625E8569CE8" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_2645E971A7A026CACF6AA625E8569CE8" xlink:type="arc" />
    <link:label id="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom0.00To9.99Member_A155102EDACB485F41D2A625E856F382_verboseLabel_en-US" xlink:label="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom0.00To9.99Member_A155102EDACB485F41D2A625E856F382" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 0.00 To 9.99 [Member]</link:label>
    <link:label id="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom0.00To9.99Member_A155102EDACB485F41D2A625E856F382_label_en-US" xlink:label="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom0.00To9.99Member_A155102EDACB485F41D2A625E856F382" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 0.00 To 9.99 [Member]</link:label>
    <link:label id="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom0.00To9.99Member_A155102EDACB485F41D2A625E856F382_documentation_en-US" xlink:label="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom0.00To9.99Member_A155102EDACB485F41D2A625E856F382" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 0.00 To 9.99 [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom0.00To9.99Member" xlink:label="loc_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom0.00To9.99Member_A155102EDACB485F41D2A625E856F382" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom0.00To9.99Member_A155102EDACB485F41D2A625E856F382" xlink:to="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom0.00To9.99Member_A155102EDACB485F41D2A625E856F382" xlink:type="arc" />
    <link:label id="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom40.00To49.99MemberMember_B4BD3255336618D7E7C6A625E8568CD3_terseLabel_en-US" xlink:label="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom40.00To49.99MemberMember_B4BD3255336618D7E7C6A625E8568CD3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 40.00 To 49.99 [Member]</link:label>
    <link:label id="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom40.00To49.99MemberMember_B4BD3255336618D7E7C6A625E8568CD3_label_en-US" xlink:label="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom40.00To49.99MemberMember_B4BD3255336618D7E7C6A625E8568CD3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 40.00 To 49.99 [Member] [Member]</link:label>
    <link:label id="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom40.00To49.99MemberMember_B4BD3255336618D7E7C6A625E8568CD3_documentation_en-US" xlink:label="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom40.00To49.99MemberMember_B4BD3255336618D7E7C6A625E8568CD3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 40.00 To 49.99 [Member] [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom40.00To49.99MemberMember" xlink:label="loc_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom40.00To49.99MemberMember_B4BD3255336618D7E7C6A625E8568CD3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom40.00To49.99MemberMember_B4BD3255336618D7E7C6A625E8568CD3" xlink:to="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom40.00To49.99MemberMember_B4BD3255336618D7E7C6A625E8568CD3" xlink:type="arc" />
    <link:label id="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom50.00To136.93Member_18B418AF215E7BDD31A0A625E856CB98_verboseLabel_en-US" xlink:label="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom50.00To136.93Member_18B418AF215E7BDD31A0A625E856CB98" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 50.00 To 136.93 [Member]</link:label>
    <link:label id="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom50.00To136.93Member_18B418AF215E7BDD31A0A625E856CB98_label_en-US" xlink:label="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom50.00To136.93Member_18B418AF215E7BDD31A0A625E856CB98" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 50.00 To 136.93 [Member]</link:label>
    <link:label id="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom50.00To136.93Member_18B418AF215E7BDD31A0A625E856CB98_documentation_en-US" xlink:label="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom50.00To136.93Member_18B418AF215E7BDD31A0A625E856CB98" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range From 50.00 To 136.93 [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom50.00To136.93Member" xlink:label="loc_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom50.00To136.93Member_18B418AF215E7BDD31A0A625E856CB98" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom50.00To136.93Member_18B418AF215E7BDD31A0A625E856CB98" xlink:to="lab_colb_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeFrom50.00To136.93Member_18B418AF215E7BDD31A0A625E856CB98" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FE351857D4700367FA3DA625E856EEE5_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FE351857D4700367FA3DA625E856EEE5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award [Line Items]</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FE351857D4700367FA3DA625E856EEE5_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FE351857D4700367FA3DA625E856EEE5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FE351857D4700367FA3DA625E856EEE5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FE351857D4700367FA3DA625E856EEE5" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FE351857D4700367FA3DA625E856EEE5" xlink:type="arc" />
    <link:label id="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisablePeriod_953B93E2BC1B77D66B57A625E857EF4A_terseLabel_en-US" xlink:label="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisablePeriod_953B93E2BC1B77D66B57A625E857EF4A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award, Exercisable Period</link:label>
    <link:label id="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisablePeriod_953B93E2BC1B77D66B57A625E857EF4A_label_en-US" xlink:label="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisablePeriod_953B93E2BC1B77D66B57A625E857EF4A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award, Exercisable Period</link:label>
    <link:label id="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisablePeriod_953B93E2BC1B77D66B57A625E857EF4A_documentation_en-US" xlink:label="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisablePeriod_953B93E2BC1B77D66B57A625E857EF4A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award, Exercise Period</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisablePeriod" xlink:label="loc_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisablePeriod_953B93E2BC1B77D66B57A625E857EF4A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisablePeriod_953B93E2BC1B77D66B57A625E857EF4A" xlink:to="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardExercisablePeriod_953B93E2BC1B77D66B57A625E857EF4A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3E3A150C71F2EF4CB693A625E8573DD1_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3E3A150C71F2EF4CB693A625E8573DD1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3E3A150C71F2EF4CB693A625E8573DD1_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3E3A150C71F2EF4CB693A625E8573DD1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3E3A150C71F2EF4CB693A625E8573DD1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3E3A150C71F2EF4CB693A625E8573DD1" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_3E3A150C71F2EF4CB693A625E8573DD1" xlink:type="arc" />
    <link:label id="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTerm_14E3CEBDC99874229CFCA625E857EA2F_terseLabel_en-US" xlink:label="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTerm_14E3CEBDC99874229CFCA625E857EA2F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award, Maximum Term</link:label>
    <link:label id="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTerm_14E3CEBDC99874229CFCA625E857EA2F_label_en-US" xlink:label="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTerm_14E3CEBDC99874229CFCA625E857EA2F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award, Maximum Term</link:label>
    <link:label id="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTerm_14E3CEBDC99874229CFCA625E857EA2F_documentation_en-US" xlink:label="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTerm_14E3CEBDC99874229CFCA625E857EA2F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award, Maximum Term</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTerm" xlink:label="loc_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTerm_14E3CEBDC99874229CFCA625E857EA2F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTerm_14E3CEBDC99874229CFCA625E857EA2F" xlink:to="lab_colb_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumTerm_14E3CEBDC99874229CFCA625E857EA2F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_33A736A4967C47A78B75A625E8584922_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_33A736A4967C47A78B75A625E8584922" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_33A736A4967C47A78B75A625E8584922" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_33A736A4967C47A78B75A625E8584922" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_33A736A4967C47A78B75A625E8584922" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_B0BEF12B3F19EC3D7DDFA625E858EC53_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_B0BEF12B3F19EC3D7DDFA625E858EC53" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance at beginning of year (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_B0BEF12B3F19EC3D7DDFA625E858EC53_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_B0BEF12B3F19EC3D7DDFA625E858EC53" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_B0BEF12B3F19EC3D7DDFA625E858EC53" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_B0BEF12B3F19EC3D7DDFA625E858EC53" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_B0BEF12B3F19EC3D7DDFA625E858EC53" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_50E192461AB360455D92A625E858681B_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_50E192461AB360455D92A625E858681B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Granted (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_50E192461AB360455D92A625E858681B_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_50E192461AB360455D92A625E858681B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_50E192461AB360455D92A625E858681B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_50E192461AB360455D92A625E858681B" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_50E192461AB360455D92A625E858681B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_53C8D0104C7D993ACC13A625E8598A9C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_53C8D0104C7D993ACC13A625E8598A9C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Expired (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_53C8D0104C7D993ACC13A625E8598A9C_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_53C8D0104C7D993ACC13A625E8598A9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_53C8D0104C7D993ACC13A625E8598A9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_53C8D0104C7D993ACC13A625E8598A9C" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_53C8D0104C7D993ACC13A625E8598A9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B97AAE0E3E41F43BEE8BA625E85963C0_negatedLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B97AAE0E3E41F43BEE8BA625E85963C0" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Exercised (in shares)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B97AAE0E3E41F43BEE8BA625E85963C0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B97AAE0E3E41F43BEE8BA625E85963C0" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_B97AAE0E3E41F43BEE8BA625E85963C0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3F08BC6F556FF1562249A625E859BB9F_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3F08BC6F556FF1562249A625E859BB9F" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance at end of year (in shares)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3F08BC6F556FF1562249A625E859BB9F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3F08BC6F556FF1562249A625E859BB9F" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3F08BC6F556FF1562249A625E859BB9F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_FF150A9C2D2F897FD2DCA625E85923B0_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_FF150A9C2D2F897FD2DCA625E85923B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Exercisable Shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_FF150A9C2D2F897FD2DCA625E85923B0_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_FF150A9C2D2F897FD2DCA625E85923B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_FF150A9C2D2F897FD2DCA625E85923B0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_FF150A9C2D2F897FD2DCA625E85923B0" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_FF150A9C2D2F897FD2DCA625E85923B0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_42510737CBE84651B220A625E8594F0A_periodStartLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_42510737CBE84651B220A625E8594F0A" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Exercise Price at beginning of year</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_42510737CBE84651B220A625E8594F0A_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_42510737CBE84651B220A625E8594F0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_42510737CBE84651B220A625E8594F0A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_42510737CBE84651B220A625E8594F0A" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_42510737CBE84651B220A625E8594F0A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_3893E2203B12D89F3830A625E859D040_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_3893E2203B12D89F3830A625E859D040" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Exercise Price, Expired</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_3893E2203B12D89F3830A625E859D040_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_3893E2203B12D89F3830A625E859D040" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_3893E2203B12D89F3830A625E859D040" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_3893E2203B12D89F3830A625E859D040" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_3893E2203B12D89F3830A625E859D040" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AE80C6D784CB1AD383CEA625E8591F64_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AE80C6D784CB1AD383CEA625E8591F64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Exercise Price, Exercised</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AE80C6D784CB1AD383CEA625E8591F64_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AE80C6D784CB1AD383CEA625E8591F64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AE80C6D784CB1AD383CEA625E8591F64" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AE80C6D784CB1AD383CEA625E8591F64" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_AE80C6D784CB1AD383CEA625E8591F64" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_786F97EB65E0C903B065A625E85A4067_periodEndLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_786F97EB65E0C903B065A625E85A4067" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Exercise Price at end of year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_786F97EB65E0C903B065A625E85A4067" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_786F97EB65E0C903B065A625E85A4067" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_786F97EB65E0C903B065A625E85A4067" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_14875D530F01CF3BD181A625E85A3944_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_14875D530F01CF3BD181A625E85A3944" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercisable, Weighted Average Exercise Price</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_14875D530F01CF3BD181A625E85A3944_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_14875D530F01CF3BD181A625E85A3944" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_14875D530F01CF3BD181A625E85A3944" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_14875D530F01CF3BD181A625E85A3944" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_14875D530F01CF3BD181A625E85A3944" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_51BCAA121A2E2304C7B5A625E85A7EBF_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_51BCAA121A2E2304C7B5A625E85A7EBF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Remaining Contractual Term</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_51BCAA121A2E2304C7B5A625E85A7EBF_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_51BCAA121A2E2304C7B5A625E85A7EBF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_51BCAA121A2E2304C7B5A625E85A7EBF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_51BCAA121A2E2304C7B5A625E85A7EBF" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_51BCAA121A2E2304C7B5A625E85A7EBF" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_21A0E6D4708AEB80929FA625E85A70CD_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_21A0E6D4708AEB80929FA625E85A70CD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate Intrinsic Value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_21A0E6D4708AEB80929FA625E85A70CD_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_21A0E6D4708AEB80929FA625E85A70CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_21A0E6D4708AEB80929FA625E85A70CD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_21A0E6D4708AEB80929FA625E85A70CD" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_21A0E6D4708AEB80929FA625E85A70CD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_75C3A545D562D2D6278EA625E85A7220_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_75C3A545D562D2D6278EA625E85A7220" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_75C3A545D562D2D6278EA625E85A7220_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_75C3A545D562D2D6278EA625E85A7220" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_75C3A545D562D2D6278EA625E85A7220" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_75C3A545D562D2D6278EA625E85A7220" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_75C3A545D562D2D6278EA625E85A7220" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_6103C674290A8CE10303A625E85B9058_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_6103C674290A8CE10303A625E85B9058" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_6103C674290A8CE10303A625E85B9058_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_6103C674290A8CE10303A625E85B9058" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_6103C674290A8CE10303A625E85B9058" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_6103C674290A8CE10303A625E85B9058" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_6103C674290A8CE10303A625E85B9058" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_1E13ACDCBC066331066EA625E85BE9BC_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_1E13ACDCBC066331066EA625E85BE9BC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_1E13ACDCBC066331066EA625E85BE9BC_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_1E13ACDCBC066331066EA625E85BE9BC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_1E13ACDCBC066331066EA625E85BE9BC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_1E13ACDCBC066331066EA625E85BE9BC" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_1E13ACDCBC066331066EA625E85BE9BC" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_B03342E9B8A45E79B03AA625E85B2C4E_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_B03342E9B8A45E79B03AA625E85B2C4E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_B03342E9B8A45E79B03AA625E85B2C4E_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_B03342E9B8A45E79B03AA625E85B2C4E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_B03342E9B8A45E79B03AA625E85B2C4E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_B03342E9B8A45E79B03AA625E85B2C4E" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_B03342E9B8A45E79B03AA625E85B2C4E" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_0B37ECCA012EFF16B359A625E85BCFD9_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_0B37ECCA012EFF16B359A625E85BCFD9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercisable, Weighted Average Remaining Contractual Term</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_0B37ECCA012EFF16B359A625E85BCFD9_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_0B37ECCA012EFF16B359A625E85BCFD9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_0B37ECCA012EFF16B359A625E85BCFD9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_0B37ECCA012EFF16B359A625E85BCFD9" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_0B37ECCA012EFF16B359A625E85BCFD9" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_C7C4598263D3B3836ECFA625E85BCE8D_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_C7C4598263D3B3836ECFA625E85BCE8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Exercisable, Aggregate Intrinsic Value</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_C7C4598263D3B3836ECFA625E85BCE8D_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_C7C4598263D3B3836ECFA625E85BCE8D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_C7C4598263D3B3836ECFA625E85BCE8D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_C7C4598263D3B3836ECFA625E85BCE8D" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_C7C4598263D3B3836ECFA625E85BCE8D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_D0C397644E61D211CE9AA625E85B67B0_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_D0C397644E61D211CE9AA625E85B67B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_D0C397644E61D211CE9AA625E85B67B0_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_D0C397644E61D211CE9AA625E85B67B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_D0C397644E61D211CE9AA625E85B67B0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_D0C397644E61D211CE9AA625E85B67B0" xlink:to="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_D0C397644E61D211CE9AA625E85B67B0" xlink:type="arc" />
    <link:label id="lab_colb_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeAbstract_6506B3E7703B055EF444A625E85C8737_label_en-US" xlink:label="lab_colb_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeAbstract_6506B3E7703B055EF444A625E85C8737" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract]</link:label>
    <link:label id="lab_colb_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeAbstract_6506B3E7703B055EF444A625E85C8737_documentation_en-US" xlink:label="lab_colb_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeAbstract_6506B3E7703B055EF444A625E85C8737" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeAbstract" xlink:label="loc_colb_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeAbstract_6506B3E7703B055EF444A625E85C8737" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeAbstract_6506B3E7703B055EF444A625E85C8737" xlink:to="lab_colb_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeAbstract_6506B3E7703B055EF444A625E85C8737" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_B5C11DDEB7A728117090A625E85CD350_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_B5C11DDEB7A728117090A625E85CD350" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Range of Exercise Prices, Lower Limit</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_B5C11DDEB7A728117090A625E85CD350_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_B5C11DDEB7A728117090A625E85CD350" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_B5C11DDEB7A728117090A625E85CD350" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_B5C11DDEB7A728117090A625E85CD350" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_B5C11DDEB7A728117090A625E85CD350" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_4725299F6F2EEFA6E21AA625E85CCDE9_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_4725299F6F2EEFA6E21AA625E85CCDE9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Range of Exercise Prices, Upper Limit</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_4725299F6F2EEFA6E21AA625E85CCDE9_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_4725299F6F2EEFA6E21AA625E85CCDE9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_4725299F6F2EEFA6E21AA625E85CCDE9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_4725299F6F2EEFA6E21AA625E85CCDE9" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_4725299F6F2EEFA6E21AA625E85CCDE9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_4625C39EF1704D96C2C1A625E85C09A3_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_4625C39EF1704D96C2C1A625E85C09A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of Option Shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_4625C39EF1704D96C2C1A625E85C09A3_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_4625C39EF1704D96C2C1A625E85C09A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_4625C39EF1704D96C2C1A625E85C09A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_4625C39EF1704D96C2C1A625E85C09A3" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_4625C39EF1704D96C2C1A625E85C09A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_27ED8EBDBB763105211AA625E85C2869_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_27ED8EBDBB763105211AA625E85C2869" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Remaining Contractual Life</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_27ED8EBDBB763105211AA625E85C2869_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_27ED8EBDBB763105211AA625E85C2869" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_27ED8EBDBB763105211AA625E85C2869" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_27ED8EBDBB763105211AA625E85C2869" xlink:to="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_27ED8EBDBB763105211AA625E85C2869" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_26C94CD2C5C60B243983A625E85D2977_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_26C94CD2C5C60B243983A625E85D2977" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Exercise Price of Option Shares</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_26C94CD2C5C60B243983A625E85D2977_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_26C94CD2C5C60B243983A625E85D2977" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_26C94CD2C5C60B243983A625E85D2977" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_26C94CD2C5C60B243983A625E85D2977" xlink:to="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_26C94CD2C5C60B243983A625E85D2977" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_124DC81AA4FB599808D6A625E85D1119_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_124DC81AA4FB599808D6A625E85D1119" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of Exercisable Option Shares</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_124DC81AA4FB599808D6A625E85D1119_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_124DC81AA4FB599808D6A625E85D1119" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_124DC81AA4FB599808D6A625E85D1119" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_124DC81AA4FB599808D6A625E85D1119" xlink:to="lab_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_124DC81AA4FB599808D6A625E85D1119" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_7BC6D946C53C8E1FFAA7A625E85D5AC9_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_7BC6D946C53C8E1FFAA7A625E85D5AC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average Exercise Price of Exercisable Option Shares</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_7BC6D946C53C8E1FFAA7A625E85D5AC9_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_7BC6D946C53C8E1FFAA7A625E85D5AC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_7BC6D946C53C8E1FFAA7A625E85D5AC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_7BC6D946C53C8E1FFAA7A625E85D5AC9" xlink:to="lab_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_7BC6D946C53C8E1FFAA7A625E85D5AC9" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_E28272D86FE3752CAE30A625E85DCC43_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_E28272D86FE3752CAE30A625E85DCC43" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_E28272D86FE3752CAE30A625E85DCC43_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_E28272D86FE3752CAE30A625E85DCC43" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_E28272D86FE3752CAE30A625E85DCC43" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_E28272D86FE3752CAE30A625E85DCC43" xlink:to="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares_E28272D86FE3752CAE30A625E85DCC43" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_D1D9A68CEB0E7A4FBBEF06BF579E6575_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_D1D9A68CEB0E7A4FBBEF06BF579E6575" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Future Amortization Expense For Core Deposit Intangibles</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_D1D9A68CEB0E7A4FBBEF06BF579E6575_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_D1D9A68CEB0E7A4FBBEF06BF579E6575" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_D1D9A68CEB0E7A4FBBEF06BF579E6575" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_D1D9A68CEB0E7A4FBBEF06BF579E6575" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseAbstract_D1D9A68CEB0E7A4FBBEF06BF579E6575" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_01F16E815457089EE1B506BF579EAE99_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_01F16E815457089EE1B506BF579EAE99" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2019</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_01F16E815457089EE1B506BF579EAE99_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_01F16E815457089EE1B506BF579EAE99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_01F16E815457089EE1B506BF579EAE99" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_01F16E815457089EE1B506BF579EAE99" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_01F16E815457089EE1B506BF579EAE99" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_B176A921650B6F3C8EB606BF579EF064_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_B176A921650B6F3C8EB606BF579EF064" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_B176A921650B6F3C8EB606BF579EF064_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_B176A921650B6F3C8EB606BF579EF064" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_B176A921650B6F3C8EB606BF579EF064" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_B176A921650B6F3C8EB606BF579EF064" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_B176A921650B6F3C8EB606BF579EF064" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_CD9581D19FA424C3E24406BF579E182A_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_CD9581D19FA424C3E24406BF579E182A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_CD9581D19FA424C3E24406BF579E182A_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_CD9581D19FA424C3E24406BF579E182A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_CD9581D19FA424C3E24406BF579E182A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_CD9581D19FA424C3E24406BF579E182A" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_CD9581D19FA424C3E24406BF579E182A" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_59B725135252FB9CDEBB06BF579E5F09_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_59B725135252FB9CDEBB06BF579E5F09" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_59B725135252FB9CDEBB06BF579E5F09_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_59B725135252FB9CDEBB06BF579E5F09" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_59B725135252FB9CDEBB06BF579E5F09" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_59B725135252FB9CDEBB06BF579E5F09" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_59B725135252FB9CDEBB06BF579E5F09" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_439DC9CED8869E63C04206BF579E0C7A_verboseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_439DC9CED8869E63C04206BF579E0C7A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_439DC9CED8869E63C04206BF579E0C7A_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_439DC9CED8869E63C04206BF579E0C7A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_439DC9CED8869E63C04206BF579E0C7A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_439DC9CED8869E63C04206BF579E0C7A" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_439DC9CED8869E63C04206BF579E0C7A" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAbstract_F877BE87AEF22470AFAC075913D608AB_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAbstract_F877BE87AEF22470AFAC075913D608AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAbstract" xlink:label="loc_us-gaap_CashAndCashEquivalentsAbstract_F877BE87AEF22470AFAC075913D608AB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAbstract_F877BE87AEF22470AFAC075913D608AB" xlink:to="lab_us-gaap_CashAndCashEquivalentsAbstract_F877BE87AEF22470AFAC075913D608AB" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_FD6214DFD9B59EB65947075913D64086_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_FD6214DFD9B59EB65947075913D64086" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_FD6214DFD9B59EB65947075913D64086_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_FD6214DFD9B59EB65947075913D64086" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsDisclosureTextBlock" xlink:label="loc_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_FD6214DFD9B59EB65947075913D64086" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_FD6214DFD9B59EB65947075913D64086" xlink:to="lab_us-gaap_CashAndCashEquivalentsDisclosureTextBlock_FD6214DFD9B59EB65947075913D64086" xlink:type="arc" />
    <link:label id="lab_colb_CondensedBalanceSheetsParentCompanyTableTextBlock_B5F9E484A0AF1F8F8FA25B4F077CE409_terseLabel_en-US" xlink:label="lab_colb_CondensedBalanceSheetsParentCompanyTableTextBlock_B5F9E484A0AF1F8F8FA25B4F077CE409" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Condensed Balance Sheets - Parent Company Only</link:label>
    <link:label id="lab_colb_CondensedBalanceSheetsParentCompanyTableTextBlock_B5F9E484A0AF1F8F8FA25B4F077CE409_label_en-US" xlink:label="lab_colb_CondensedBalanceSheetsParentCompanyTableTextBlock_B5F9E484A0AF1F8F8FA25B4F077CE409" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Balance Sheets, Parent Company [Table Text Block]</link:label>
    <link:label id="lab_colb_CondensedBalanceSheetsParentCompanyTableTextBlock_B5F9E484A0AF1F8F8FA25B4F077CE409_documentation_en-US" xlink:label="lab_colb_CondensedBalanceSheetsParentCompanyTableTextBlock_B5F9E484A0AF1F8F8FA25B4F077CE409" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Condensed Balance Sheets, Parent Company [Table Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CondensedBalanceSheetsParentCompanyTableTextBlock" xlink:label="loc_colb_CondensedBalanceSheetsParentCompanyTableTextBlock_B5F9E484A0AF1F8F8FA25B4F077CE409" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CondensedBalanceSheetsParentCompanyTableTextBlock_B5F9E484A0AF1F8F8FA25B4F077CE409" xlink:to="lab_colb_CondensedBalanceSheetsParentCompanyTableTextBlock_B5F9E484A0AF1F8F8FA25B4F077CE409" xlink:type="arc" />
    <link:label id="lab_colb_CondensedStatementsOfIncomeParentCompanyTableTextBlock_9E6B14B50A51A0C266D35B4F077C6BBB_terseLabel_en-US" xlink:label="lab_colb_CondensedStatementsOfIncomeParentCompanyTableTextBlock_9E6B14B50A51A0C266D35B4F077C6BBB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Condensed Statements of Income - Parent Company Only</link:label>
    <link:label id="lab_colb_CondensedStatementsOfIncomeParentCompanyTableTextBlock_9E6B14B50A51A0C266D35B4F077C6BBB_label_en-US" xlink:label="lab_colb_CondensedStatementsOfIncomeParentCompanyTableTextBlock_9E6B14B50A51A0C266D35B4F077C6BBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Statements of Income, Parent Company [Table Text Block]</link:label>
    <link:label id="lab_colb_CondensedStatementsOfIncomeParentCompanyTableTextBlock_9E6B14B50A51A0C266D35B4F077C6BBB_documentation_en-US" xlink:label="lab_colb_CondensedStatementsOfIncomeParentCompanyTableTextBlock_9E6B14B50A51A0C266D35B4F077C6BBB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Condensed Statements of Income, Parent Company [Table Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CondensedStatementsOfIncomeParentCompanyTableTextBlock" xlink:label="loc_colb_CondensedStatementsOfIncomeParentCompanyTableTextBlock_9E6B14B50A51A0C266D35B4F077C6BBB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CondensedStatementsOfIncomeParentCompanyTableTextBlock_9E6B14B50A51A0C266D35B4F077C6BBB" xlink:to="lab_colb_CondensedStatementsOfIncomeParentCompanyTableTextBlock_9E6B14B50A51A0C266D35B4F077C6BBB" xlink:type="arc" />
    <link:label id="lab_colb_CondensedStatementsOfCashFlowsParentCompanyTableTextBlock_67EB31CC96461987DA615B4F077CD861_terseLabel_en-US" xlink:label="lab_colb_CondensedStatementsOfCashFlowsParentCompanyTableTextBlock_67EB31CC96461987DA615B4F077CD861" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Condensed Statements of Cash Flows - Parent Company Only</link:label>
    <link:label id="lab_colb_CondensedStatementsOfCashFlowsParentCompanyTableTextBlock_67EB31CC96461987DA615B4F077CD861_label_en-US" xlink:label="lab_colb_CondensedStatementsOfCashFlowsParentCompanyTableTextBlock_67EB31CC96461987DA615B4F077CD861" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Condensed Statements of Cash Flows, Parent Company [Table Text Block]</link:label>
    <link:label id="lab_colb_CondensedStatementsOfCashFlowsParentCompanyTableTextBlock_67EB31CC96461987DA615B4F077CD861_documentation_en-US" xlink:label="lab_colb_CondensedStatementsOfCashFlowsParentCompanyTableTextBlock_67EB31CC96461987DA615B4F077CD861" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Condensed Statements of Cash Flows, Parent Company [Table Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CondensedStatementsOfCashFlowsParentCompanyTableTextBlock" xlink:label="loc_colb_CondensedStatementsOfCashFlowsParentCompanyTableTextBlock_67EB31CC96461987DA615B4F077CD861" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CondensedStatementsOfCashFlowsParentCompanyTableTextBlock_67EB31CC96461987DA615B4F077CD861" xlink:to="lab_colb_CondensedStatementsOfCashFlowsParentCompanyTableTextBlock_67EB31CC96461987DA615B4F077CD861" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_05C6BA0A4E4FD30312225B4F0847FFE7_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_05C6BA0A4E4FD30312225B4F0847FFE7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Financing Receivable, Allowance for Credit Losses [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_05C6BA0A4E4FD30312225B4F0847FFE7_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_05C6BA0A4E4FD30312225B4F0847FFE7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Financing Receivable, Allowance for Credit Losses [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_05C6BA0A4E4FD30312225B4F0847FFE7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_05C6BA0A4E4FD30312225B4F0847FFE7" xlink:to="lab_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_05C6BA0A4E4FD30312225B4F0847FFE7" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_87C3889A7EFE1EB18D235B4F0847C14A_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_87C3889A7EFE1EB18D235B4F0847C14A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Losses [Line Items]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_87C3889A7EFE1EB18D235B4F0847C14A_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_87C3889A7EFE1EB18D235B4F0847C14A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Losses [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_87C3889A7EFE1EB18D235B4F0847C14A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_87C3889A7EFE1EB18D235B4F0847C14A" xlink:to="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_87C3889A7EFE1EB18D235B4F0847C14A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_B8E26400186EE1F2F9425B4F08471D20_terseLabel_en-US" xlink:label="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_B8E26400186EE1F2F9425B4F08471D20" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in the Allowance for Loan and Lease Losses</link:label>
    <link:label id="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_B8E26400186EE1F2F9425B4F08471D20_label_en-US" xlink:label="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_B8E26400186EE1F2F9425B4F08471D20" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance for Credit Losses on Financing Receivables [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock" xlink:label="loc_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_B8E26400186EE1F2F9425B4F08471D20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_B8E26400186EE1F2F9425B4F08471D20" xlink:to="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_B8E26400186EE1F2F9425B4F08471D20" xlink:type="arc" />
    <link:label id="lab_colb_ChangesInAllowanceForUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_3CA0D6461F0709611DCA5B4F0847D332_terseLabel_en-US" xlink:label="lab_colb_ChangesInAllowanceForUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_3CA0D6461F0709611DCA5B4F0847D332" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Changes in the Allowance for Unfunded Commitments and Letters of Credit</link:label>
    <link:label id="lab_colb_ChangesInAllowanceForUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_3CA0D6461F0709611DCA5B4F0847D332_label_en-US" xlink:label="lab_colb_ChangesInAllowanceForUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_3CA0D6461F0709611DCA5B4F0847D332" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Changes In The Allowance For Unfunded Loan Commitments And Letters Of Credit [Text Block]</link:label>
    <link:label id="lab_colb_ChangesInAllowanceForUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_3CA0D6461F0709611DCA5B4F0847D332_documentation_en-US" xlink:label="lab_colb_ChangesInAllowanceForUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_3CA0D6461F0709611DCA5B4F0847D332" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Changes In The Allowance For Unfunded Loan Commitments And Letters Of Credit [Text Block]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ChangesInAllowanceForUnfundedLoanCommitmentsAndLettersOfCreditTextBlock" xlink:label="loc_colb_ChangesInAllowanceForUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_3CA0D6461F0709611DCA5B4F0847D332" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ChangesInAllowanceForUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_3CA0D6461F0709611DCA5B4F0847D332" xlink:to="lab_colb_ChangesInAllowanceForUnfundedLoanCommitmentsAndLettersOfCreditTextBlock_3CA0D6461F0709611DCA5B4F0847D332" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_55A8A2CE8924FD12FC915B4F08478199_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_55A8A2CE8924FD12FC915B4F08478199" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable Credit Quality Indicators [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_55A8A2CE8924FD12FC915B4F08478199_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_55A8A2CE8924FD12FC915B4F08478199" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable Credit Quality Indicators [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock" xlink:label="loc_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_55A8A2CE8924FD12FC915B4F08478199" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_55A8A2CE8924FD12FC915B4F08478199" xlink:to="lab_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_55A8A2CE8924FD12FC915B4F08478199" xlink:type="arc" />
    <link:label id="lab_colb_AmountsreclassifiedfromAccumulatedOtherComprehensiveIncomeAbstract_9D076096299324692D270803BDB708A8_label_en-US" xlink:label="lab_colb_AmountsreclassifiedfromAccumulatedOtherComprehensiveIncomeAbstract_9D076096299324692D270803BDB708A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amounts reclassified from Accumulated Other Comprehensive Income [Abstract]</link:label>
    <link:label id="lab_colb_AmountsreclassifiedfromAccumulatedOtherComprehensiveIncomeAbstract_9D076096299324692D270803BDB708A8_documentation_en-US" xlink:label="lab_colb_AmountsreclassifiedfromAccumulatedOtherComprehensiveIncomeAbstract_9D076096299324692D270803BDB708A8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amounts reclassified from Accumulated Other Comprehensive Income [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AmountsreclassifiedfromAccumulatedOtherComprehensiveIncomeAbstract" xlink:label="loc_colb_AmountsreclassifiedfromAccumulatedOtherComprehensiveIncomeAbstract_9D076096299324692D270803BDB708A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AmountsreclassifiedfromAccumulatedOtherComprehensiveIncomeAbstract_9D076096299324692D270803BDB708A8" xlink:to="lab_colb_AmountsreclassifiedfromAccumulatedOtherComprehensiveIncomeAbstract_9D076096299324692D270803BDB708A8" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_2A4E26DD164E1EFFA76F0803BDB75E50_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_2A4E26DD164E1EFFA76F0803BDB75E50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Table]</link:label>
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_2A4E26DD164E1EFFA76F0803BDB75E50_label_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_2A4E26DD164E1EFFA76F0803BDB75E50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_2A4E26DD164E1EFFA76F0803BDB75E50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_2A4E26DD164E1EFFA76F0803BDB75E50" xlink:to="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_2A4E26DD164E1EFFA76F0803BDB75E50" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4A402C6C649B0F84855A0803BDC7CFD6_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4A402C6C649B0F84855A0803BDC7CFD6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Axis]</link:label>
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4A402C6C649B0F84855A0803BDC7CFD6_label_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4A402C6C649B0F84855A0803BDC7CFD6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4A402C6C649B0F84855A0803BDC7CFD6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4A402C6C649B0F84855A0803BDC7CFD6" xlink:to="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_4A402C6C649B0F84855A0803BDC7CFD6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_FEE3771E3723B92355340803BDC7C2B4_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_FEE3771E3723B92355340803BDC7C2B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Domain]</link:label>
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_FEE3771E3723B92355340803BDC7C2B4_label_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_FEE3771E3723B92355340803BDC7C2B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_FEE3771E3723B92355340803BDC7C2B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_FEE3771E3723B92355340803BDC7C2B4" xlink:to="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_FEE3771E3723B92355340803BDC7C2B4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_C2CD1C15A03297382CEC0803BDC75514_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_C2CD1C15A03297382CEC0803BDC75514" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Member]</link:label>
    <link:label id="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_C2CD1C15A03297382CEC0803BDC75514_label_en-US" xlink:label="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_C2CD1C15A03297382CEC0803BDC75514" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification out of Accumulated Other Comprehensive Income [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_C2CD1C15A03297382CEC0803BDC75514" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_C2CD1C15A03297382CEC0803BDC75514" xlink:to="lab_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_C2CD1C15A03297382CEC0803BDC75514" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_8CA1C892D0DC1FEB39FA0803BDC7BC2C_terseLabel_en-US" xlink:label="lab_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_8CA1C892D0DC1FEB39FA0803BDC7BC2C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]</link:label>
    <link:label id="lab_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_8CA1C892D0DC1FEB39FA0803BDC7BC2C_label_en-US" xlink:label="lab_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_8CA1C892D0DC1FEB39FA0803BDC7BC2C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_8CA1C892D0DC1FEB39FA0803BDC7BC2C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_8CA1C892D0DC1FEB39FA0803BDC7BC2C" xlink:to="lab_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_8CA1C892D0DC1FEB39FA0803BDC7BC2C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_8CDF9E1333CC528BB7C20803BDC7DBCD_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_8CDF9E1333CC528BB7C20803BDC7DBCD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investment securities gains (losses), net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_8CDF9E1333CC528BB7C20803BDC7DBCD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_8CDF9E1333CC528BB7C20803BDC7DBCD" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_8CDF9E1333CC528BB7C20803BDC7DBCD" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_598A498A57B934DCAADD0803BDC78578_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_598A498A57B934DCAADD0803BDC78578" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_598A498A57B934DCAADD0803BDC78578" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_598A498A57B934DCAADD0803BDC78578" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_598A498A57B934DCAADD0803BDC78578" xlink:type="arc" />
    <link:label id="lab_colb_FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus_515497FEF450D52ABB9C5B4F07CA905C_terseLabel_en-US" xlink:label="lab_colb_FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus_515497FEF450D52ABB9C5B4F07CA905C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unpaid Principal Balance Nonaccrual Loans</link:label>
    <link:label id="lab_colb_FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus_515497FEF450D52ABB9C5B4F07CA905C_label_en-US" xlink:label="lab_colb_FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus_515497FEF450D52ABB9C5B4F07CA905C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable Unpaid Principal Balance Nonaccrual Status</link:label>
    <link:label id="lab_colb_FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus_515497FEF450D52ABB9C5B4F07CA905C_documentation_en-US" xlink:label="lab_colb_FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus_515497FEF450D52ABB9C5B4F07CA905C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financing Receivable Unpaid Principal Balance Nonaccrual Status.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus" xlink:label="loc_colb_FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus_515497FEF450D52ABB9C5B4F07CA905C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus_515497FEF450D52ABB9C5B4F07CA905C" xlink:to="lab_colb_FinancingReceivableUnpaidPrincipalBalanceNonaccrualStatus_515497FEF450D52ABB9C5B4F07CA905C" xlink:type="arc" />
    <link:label id="lab_colb_FinancingReceivableRecordedInvestmentGrossNonaccrualStatus_2B983C988A4C74C6E41D5B4F07CA9780_terseLabel_en-US" xlink:label="lab_colb_FinancingReceivableRecordedInvestmentGrossNonaccrualStatus_2B983C988A4C74C6E41D5B4F07CA9780" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recorded Investment Nonaccrual Loans</link:label>
    <link:label id="lab_colb_FinancingReceivableRecordedInvestmentGrossNonaccrualStatus_2B983C988A4C74C6E41D5B4F07CA9780_label_en-US" xlink:label="lab_colb_FinancingReceivableRecordedInvestmentGrossNonaccrualStatus_2B983C988A4C74C6E41D5B4F07CA9780" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, Gross, Nonaccrual Status</link:label>
    <link:label id="lab_colb_FinancingReceivableRecordedInvestmentGrossNonaccrualStatus_2B983C988A4C74C6E41D5B4F07CA9780_documentation_en-US" xlink:label="lab_colb_FinancingReceivableRecordedInvestmentGrossNonaccrualStatus_2B983C988A4C74C6E41D5B4F07CA9780" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, Gross, Nonaccrual Status</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FinancingReceivableRecordedInvestmentGrossNonaccrualStatus" xlink:label="loc_colb_FinancingReceivableRecordedInvestmentGrossNonaccrualStatus_2B983C988A4C74C6E41D5B4F07CA9780" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FinancingReceivableRecordedInvestmentGrossNonaccrualStatus_2B983C988A4C74C6E41D5B4F07CA9780" xlink:to="lab_colb_FinancingReceivableRecordedInvestmentGrossNonaccrualStatus_2B983C988A4C74C6E41D5B4F07CA9780" xlink:type="arc" />
    <link:label id="lab_colb_RecentdevelopmentsAxis_662BBB3AB242E31E41C2CE8B425E83AE_terseLabel_en-US" xlink:label="lab_colb_RecentdevelopmentsAxis_662BBB3AB242E31E41C2CE8B425E83AE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recent developments [Axis]</link:label>
    <link:label id="lab_colb_RecentdevelopmentsAxis_662BBB3AB242E31E41C2CE8B425E83AE_label_en-US" xlink:label="lab_colb_RecentdevelopmentsAxis_662BBB3AB242E31E41C2CE8B425E83AE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recent developments [Axis]</link:label>
    <link:label id="lab_colb_RecentdevelopmentsAxis_662BBB3AB242E31E41C2CE8B425E83AE_documentation_en-US" xlink:label="lab_colb_RecentdevelopmentsAxis_662BBB3AB242E31E41C2CE8B425E83AE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Recent developments [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_RecentdevelopmentsAxis" xlink:label="loc_colb_RecentdevelopmentsAxis_662BBB3AB242E31E41C2CE8B425E83AE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_RecentdevelopmentsAxis_662BBB3AB242E31E41C2CE8B425E83AE" xlink:to="lab_colb_RecentdevelopmentsAxis_662BBB3AB242E31E41C2CE8B425E83AE" xlink:type="arc" />
    <link:label id="lab_colb_RecentdevelopmentsDomain_D366593DAED7BB9E4BE0CE8B425E92AF_terseLabel_en-US" xlink:label="lab_colb_RecentdevelopmentsDomain_D366593DAED7BB9E4BE0CE8B425E92AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recent developments [Domain]</link:label>
    <link:label id="lab_colb_RecentdevelopmentsDomain_D366593DAED7BB9E4BE0CE8B425E92AF_label_en-US" xlink:label="lab_colb_RecentdevelopmentsDomain_D366593DAED7BB9E4BE0CE8B425E92AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recent developments [Domain]</link:label>
    <link:label id="lab_colb_RecentdevelopmentsDomain_D366593DAED7BB9E4BE0CE8B425E92AF_documentation_en-US" xlink:label="lab_colb_RecentdevelopmentsDomain_D366593DAED7BB9E4BE0CE8B425E92AF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Domain] for Recent developments [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_RecentdevelopmentsDomain" xlink:label="loc_colb_RecentdevelopmentsDomain_D366593DAED7BB9E4BE0CE8B425E92AF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_RecentdevelopmentsDomain_D366593DAED7BB9E4BE0CE8B425E92AF" xlink:to="lab_colb_RecentdevelopmentsDomain_D366593DAED7BB9E4BE0CE8B425E92AF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountingStandardsUpdate201602Member_A26D5D02E0BE9B4E55E7CE8B425EE759_terseLabel_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201602Member_A26D5D02E0BE9B4E55E7CE8B425EE759" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounting Standards Update 2016-02 [Member]</link:label>
    <link:label id="lab_us-gaap_AccountingStandardsUpdate201602Member_A26D5D02E0BE9B4E55E7CE8B425EE759_label_en-US" xlink:label="lab_us-gaap_AccountingStandardsUpdate201602Member_A26D5D02E0BE9B4E55E7CE8B425EE759" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounting Standards Update 2016-02 [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountingStandardsUpdate201602Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201602Member_A26D5D02E0BE9B4E55E7CE8B425EE759" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountingStandardsUpdate201602Member_A26D5D02E0BE9B4E55E7CE8B425EE759" xlink:to="lab_us-gaap_AccountingStandardsUpdate201602Member_A26D5D02E0BE9B4E55E7CE8B425EE759" xlink:type="arc" />
    <link:label id="lab_srt_MinimumMember_0C18FAF7E4D4F7BA1DD4CE8B425EDC82_terseLabel_en-US" xlink:label="lab_srt_MinimumMember_0C18FAF7E4D4F7BA1DD4CE8B425EDC82" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MinimumMember" xlink:label="loc_srt_MinimumMember_0C18FAF7E4D4F7BA1DD4CE8B425EDC82" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MinimumMember_0C18FAF7E4D4F7BA1DD4CE8B425EDC82" xlink:to="lab_srt_MinimumMember_0C18FAF7E4D4F7BA1DD4CE8B425EDC82" xlink:type="arc" />
    <link:label id="lab_us-gaap_BuildingAndBuildingImprovementsMember_FFE6BBDACC27582EF712CE8B425E18FA_terseLabel_en-US" xlink:label="lab_us-gaap_BuildingAndBuildingImprovementsMember_FFE6BBDACC27582EF712CE8B425E18FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Building and Building Improvements [Member]</link:label>
    <link:label id="lab_us-gaap_BuildingAndBuildingImprovementsMember_FFE6BBDACC27582EF712CE8B425E18FA_label_en-US" xlink:label="lab_us-gaap_BuildingAndBuildingImprovementsMember_FFE6BBDACC27582EF712CE8B425E18FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Building and Building Improvements [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_FFE6BBDACC27582EF712CE8B425E18FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BuildingAndBuildingImprovementsMember_FFE6BBDACC27582EF712CE8B425E18FA" xlink:to="lab_us-gaap_BuildingAndBuildingImprovementsMember_FFE6BBDACC27582EF712CE8B425E18FA" xlink:type="arc" />
    <link:label id="lab_us-gaap_FurnitureAndFixturesMember_FE5908928689A4AE0D4FCE8B425EB60B_terseLabel_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesMember_FE5908928689A4AE0D4FCE8B425EB60B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Furniture and Fixtures [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_FE5908928689A4AE0D4FCE8B425EB60B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FurnitureAndFixturesMember_FE5908928689A4AE0D4FCE8B425EB60B" xlink:to="lab_us-gaap_FurnitureAndFixturesMember_FE5908928689A4AE0D4FCE8B425EB60B" xlink:type="arc" />
    <link:label id="lab_us-gaap_VehiclesMember_F63928353BB88900D032CE8B425E0C5F_terseLabel_en-US" xlink:label="lab_us-gaap_VehiclesMember_F63928353BB88900D032CE8B425E0C5F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vehicles [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VehiclesMember" xlink:label="loc_us-gaap_VehiclesMember_F63928353BB88900D032CE8B425E0C5F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VehiclesMember_F63928353BB88900D032CE8B425E0C5F" xlink:to="lab_us-gaap_VehiclesMember_F63928353BB88900D032CE8B425E0C5F" xlink:type="arc" />
    <link:label id="lab_stpr_OR_6E2C58280A29027D9445CE8B425E22B5_terseLabel_en-US" xlink:label="lab_stpr_OR_6E2C58280A29027D9445CE8B425E22B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OREGON</link:label>
    <link:label id="lab_stpr_OR_6E2C58280A29027D9445CE8B425E22B5_label_en-US" xlink:label="lab_stpr_OR_6E2C58280A29027D9445CE8B425E22B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OREGON</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_OR" xlink:label="loc_stpr_OR_6E2C58280A29027D9445CE8B425E22B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_stpr_OR_6E2C58280A29027D9445CE8B425E22B5" xlink:to="lab_stpr_OR_6E2C58280A29027D9445CE8B425E22B5" xlink:type="arc" />
    <link:label id="lab_colb_ExpectedchangeinotherassetsduetoadoptionofnewASU_754538CBEA9A0D7FFBD7CEC73C5D1B27_terseLabel_en-US" xlink:label="lab_colb_ExpectedchangeinotherassetsduetoadoptionofnewASU_754538CBEA9A0D7FFBD7CEC73C5D1B27" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">New Accounting Pronouncement, Early Adoption [Table Text Block]</link:label>
    <link:label id="lab_colb_ExpectedchangeinotherassetsduetoadoptionofnewASU_754538CBEA9A0D7FFBD7CEC73C5D1B27_label_en-US" xlink:label="lab_colb_ExpectedchangeinotherassetsduetoadoptionofnewASU_754538CBEA9A0D7FFBD7CEC73C5D1B27" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Expected change in other assets due to adoption of new ASU</link:label>
    <link:label id="lab_colb_ExpectedchangeinotherassetsduetoadoptionofnewASU_754538CBEA9A0D7FFBD7CEC73C5D1B27_documentation_en-US" xlink:label="lab_colb_ExpectedchangeinotherassetsduetoadoptionofnewASU_754538CBEA9A0D7FFBD7CEC73C5D1B27" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Expected change in other assets due to adoption of new ASU</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ExpectedchangeinotherassetsduetoadoptionofnewASU" xlink:label="loc_colb_ExpectedchangeinotherassetsduetoadoptionofnewASU_754538CBEA9A0D7FFBD7CEC73C5D1B27" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ExpectedchangeinotherassetsduetoadoptionofnewASU_754538CBEA9A0D7FFBD7CEC73C5D1B27" xlink:to="lab_colb_ExpectedchangeinotherassetsduetoadoptionofnewASU_754538CBEA9A0D7FFBD7CEC73C5D1B27" xlink:type="arc" />
    <link:label id="lab_colb_ExpectedchangeinotherliabilitiesduetoadoptionofnewASU_A46C576E918A62F50730CED0B520858F_terseLabel_en-US" xlink:label="lab_colb_ExpectedchangeinotherliabilitiesduetoadoptionofnewASU_A46C576E918A62F50730CED0B520858F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expected change in other liabilities due to adoption of new ASU</link:label>
    <link:label id="lab_colb_ExpectedchangeinotherliabilitiesduetoadoptionofnewASU_A46C576E918A62F50730CED0B520858F_label_en-US" xlink:label="lab_colb_ExpectedchangeinotherliabilitiesduetoadoptionofnewASU_A46C576E918A62F50730CED0B520858F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Expected change in other liabilities due to adoption of new ASU</link:label>
    <link:label id="lab_colb_ExpectedchangeinotherliabilitiesduetoadoptionofnewASU_A46C576E918A62F50730CED0B520858F_documentation_en-US" xlink:label="lab_colb_ExpectedchangeinotherliabilitiesduetoadoptionofnewASU_A46C576E918A62F50730CED0B520858F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Expected change in other liabilities due to adoption of new ASU</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ExpectedchangeinotherliabilitiesduetoadoptionofnewASU" xlink:label="loc_colb_ExpectedchangeinotherliabilitiesduetoadoptionofnewASU_A46C576E918A62F50730CED0B520858F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ExpectedchangeinotherliabilitiesduetoadoptionofnewASU_A46C576E918A62F50730CED0B520858F" xlink:to="lab_colb_ExpectedchangeinotherliabilitiesduetoadoptionofnewASU_A46C576E918A62F50730CED0B520858F" xlink:type="arc" />
    <link:label id="lab_colb_FHLBmembershipstockpurchaserequirementcap_9AB4A6DDC16B48108D7FCE8B425E979E_terseLabel_en-US" xlink:label="lab_colb_FHLBmembershipstockpurchaserequirementcap_9AB4A6DDC16B48108D7FCE8B425E979E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FHLB membership stock purchase requirement cap</link:label>
    <link:label id="lab_colb_FHLBmembershipstockpurchaserequirementcap_9AB4A6DDC16B48108D7FCE8B425E979E_label_en-US" xlink:label="lab_colb_FHLBmembershipstockpurchaserequirementcap_9AB4A6DDC16B48108D7FCE8B425E979E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">FHLB membership stock purchase requirement cap</link:label>
    <link:label id="lab_colb_FHLBmembershipstockpurchaserequirementcap_9AB4A6DDC16B48108D7FCE8B425E979E_documentation_en-US" xlink:label="lab_colb_FHLBmembershipstockpurchaserequirementcap_9AB4A6DDC16B48108D7FCE8B425E979E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">FHLB membership stock purchase requirement cap</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FHLBmembershipstockpurchaserequirementcap" xlink:label="loc_colb_FHLBmembershipstockpurchaserequirementcap_9AB4A6DDC16B48108D7FCE8B425E979E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FHLBmembershipstockpurchaserequirementcap_9AB4A6DDC16B48108D7FCE8B425E979E" xlink:to="lab_colb_FHLBmembershipstockpurchaserequirementcap_9AB4A6DDC16B48108D7FCE8B425E979E" xlink:type="arc" />
    <link:label id="lab_colb_Gainonsaleofmerchantcardservicesportfolio_EC3944A532DE776518EACE8B425EF1E5_terseLabel_en-US" xlink:label="lab_colb_Gainonsaleofmerchantcardservicesportfolio_EC3944A532DE776518EACE8B425EF1E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain on sale of merchant card services portfolio</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Gainonsaleofmerchantcardservicesportfolio" xlink:label="loc_colb_Gainonsaleofmerchantcardservicesportfolio_EC3944A532DE776518EACE8B425EF1E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Gainonsaleofmerchantcardservicesportfolio_EC3944A532DE776518EACE8B425EF1E5" xlink:to="lab_colb_Gainonsaleofmerchantcardservicesportfolio_EC3944A532DE776518EACE8B425EF1E5" xlink:type="arc" />
    <link:label id="lab_colb_NumberOfBranchLocations_2A7E16B40447E6A99303CE8B425F6614_terseLabel_en-US" xlink:label="lab_colb_NumberOfBranchLocations_2A7E16B40447E6A99303CE8B425F6614" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number Of Branch Locations</link:label>
    <link:label id="lab_colb_NumberOfBranchLocations_2A7E16B40447E6A99303CE8B425F6614_label_en-US" xlink:label="lab_colb_NumberOfBranchLocations_2A7E16B40447E6A99303CE8B425F6614" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Branch Locations</link:label>
    <link:label id="lab_colb_NumberOfBranchLocations_2A7E16B40447E6A99303CE8B425F6614_documentation_en-US" xlink:label="lab_colb_NumberOfBranchLocations_2A7E16B40447E6A99303CE8B425F6614" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Branch Locations</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_NumberOfBranchLocations" xlink:label="loc_colb_NumberOfBranchLocations_2A7E16B40447E6A99303CE8B425F6614" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_NumberOfBranchLocations_2A7E16B40447E6A99303CE8B425F6614" xlink:to="lab_colb_NumberOfBranchLocations_2A7E16B40447E6A99303CE8B425F6614" xlink:type="arc" />
    <link:label id="lab_colb_NumberOfDaysUsedToDetermineTreatmentAsCashEquivalent_217E28D0B0729B4B37C5CE8B425F97E5_label_en-US" xlink:label="lab_colb_NumberOfDaysUsedToDetermineTreatmentAsCashEquivalent_217E28D0B0729B4B37C5CE8B425F97E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Days Used To Determine Treatment As Cash Equivalent</link:label>
    <link:label id="lab_colb_NumberOfDaysUsedToDetermineTreatmentAsCashEquivalent_217E28D0B0729B4B37C5CE8B425F97E5_documentation_en-US" xlink:label="lab_colb_NumberOfDaysUsedToDetermineTreatmentAsCashEquivalent_217E28D0B0729B4B37C5CE8B425F97E5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Days Used To Determine Treatment As Cash Equivalent</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_NumberOfDaysUsedToDetermineTreatmentAsCashEquivalent" xlink:label="loc_colb_NumberOfDaysUsedToDetermineTreatmentAsCashEquivalent_217E28D0B0729B4B37C5CE8B425F97E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_NumberOfDaysUsedToDetermineTreatmentAsCashEquivalent_217E28D0B0729B4B37C5CE8B425F97E5" xlink:to="lab_colb_NumberOfDaysUsedToDetermineTreatmentAsCashEquivalent_217E28D0B0729B4B37C5CE8B425F97E5" xlink:type="arc" />
    <link:label id="lab_colb_NumberofDaysofDelinquencyatWhichLoansAreCategorizedAsNonAccrualStatus_06A0108C052E4C274A0ACE8B425FDC60_label_en-US" xlink:label="lab_colb_NumberofDaysofDelinquencyatWhichLoansAreCategorizedAsNonAccrualStatus_06A0108C052E4C274A0ACE8B425FDC60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Days of Delinquency at Which Loans Are Categorized As Non Accrual Status</link:label>
    <link:label id="lab_colb_NumberofDaysofDelinquencyatWhichLoansAreCategorizedAsNonAccrualStatus_06A0108C052E4C274A0ACE8B425FDC60_documentation_en-US" xlink:label="lab_colb_NumberofDaysofDelinquencyatWhichLoansAreCategorizedAsNonAccrualStatus_06A0108C052E4C274A0ACE8B425FDC60" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of Days of Delinquency at Which Loans Are Categorized As Non Accrual Status</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_NumberofDaysofDelinquencyatWhichLoansAreCategorizedAsNonAccrualStatus" xlink:label="loc_colb_NumberofDaysofDelinquencyatWhichLoansAreCategorizedAsNonAccrualStatus_06A0108C052E4C274A0ACE8B425FDC60" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_NumberofDaysofDelinquencyatWhichLoansAreCategorizedAsNonAccrualStatus_06A0108C052E4C274A0ACE8B425FDC60" xlink:to="lab_colb_NumberofDaysofDelinquencyatWhichLoansAreCategorizedAsNonAccrualStatus_06A0108C052E4C274A0ACE8B425FDC60" xlink:type="arc" />
    <link:label id="lab_colb_LoansAndLeasesReceivableNonaccrualLoansConsideredImpaired_42BDE52A3AA8E8F069F0CE8B425FE5CB_terseLabel_en-US" xlink:label="lab_colb_LoansAndLeasesReceivableNonaccrualLoansConsideredImpaired_42BDE52A3AA8E8F069F0CE8B425FE5CB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Nonaccrual Loans Considered Impaired</link:label>
    <link:label id="lab_colb_LoansAndLeasesReceivableNonaccrualLoansConsideredImpaired_42BDE52A3AA8E8F069F0CE8B425FE5CB_label_en-US" xlink:label="lab_colb_LoansAndLeasesReceivableNonaccrualLoansConsideredImpaired_42BDE52A3AA8E8F069F0CE8B425FE5CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Nonaccrual Loans Considered Impaired</link:label>
    <link:label id="lab_colb_LoansAndLeasesReceivableNonaccrualLoansConsideredImpaired_42BDE52A3AA8E8F069F0CE8B425FE5CB_documentation_en-US" xlink:label="lab_colb_LoansAndLeasesReceivableNonaccrualLoansConsideredImpaired_42BDE52A3AA8E8F069F0CE8B425FE5CB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Nonaccrual Loans Considered Impaired</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoansAndLeasesReceivableNonaccrualLoansConsideredImpaired" xlink:label="loc_colb_LoansAndLeasesReceivableNonaccrualLoansConsideredImpaired_42BDE52A3AA8E8F069F0CE8B425FE5CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoansAndLeasesReceivableNonaccrualLoansConsideredImpaired_42BDE52A3AA8E8F069F0CE8B425FE5CB" xlink:to="lab_colb_LoansAndLeasesReceivableNonaccrualLoansConsideredImpaired_42BDE52A3AA8E8F069F0CE8B425FE5CB" xlink:type="arc" />
    <link:label id="lab_colb_LoansAndLeasesReceivableLoansEvaluatedForImpairmentOnQuarterlyBasisOutstanding_8E40D194B2FBDD94D047CE8B425F63D0_terseLabel_en-US" xlink:label="lab_colb_LoansAndLeasesReceivableLoansEvaluatedForImpairmentOnQuarterlyBasisOutstanding_8E40D194B2FBDD94D047CE8B425F63D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Loans Evaluated For Impairment On Quarterly Basis, Outstanding</link:label>
    <link:label id="lab_colb_LoansAndLeasesReceivableLoansEvaluatedForImpairmentOnQuarterlyBasisOutstanding_8E40D194B2FBDD94D047CE8B425F63D0_label_en-US" xlink:label="lab_colb_LoansAndLeasesReceivableLoansEvaluatedForImpairmentOnQuarterlyBasisOutstanding_8E40D194B2FBDD94D047CE8B425F63D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Loans Evaluated For Impairment On Quarterly Basis, Outstanding</link:label>
    <link:label id="lab_colb_LoansAndLeasesReceivableLoansEvaluatedForImpairmentOnQuarterlyBasisOutstanding_8E40D194B2FBDD94D047CE8B425F63D0_documentation_en-US" xlink:label="lab_colb_LoansAndLeasesReceivableLoansEvaluatedForImpairmentOnQuarterlyBasisOutstanding_8E40D194B2FBDD94D047CE8B425F63D0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Loans Evaluated For Impairment On Quarterly Basis, Outstanding</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoansAndLeasesReceivableLoansEvaluatedForImpairmentOnQuarterlyBasisOutstanding" xlink:label="loc_colb_LoansAndLeasesReceivableLoansEvaluatedForImpairmentOnQuarterlyBasisOutstanding_8E40D194B2FBDD94D047CE8B425F63D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoansAndLeasesReceivableLoansEvaluatedForImpairmentOnQuarterlyBasisOutstanding_8E40D194B2FBDD94D047CE8B425F63D0" xlink:to="lab_colb_LoansAndLeasesReceivableLoansEvaluatedForImpairmentOnQuarterlyBasisOutstanding_8E40D194B2FBDD94D047CE8B425F63D0" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_76758C24A1A01B9BE958CE8B425FD256_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_76758C24A1A01B9BE958CE8B425FD256" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Estimated Useful Lives</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_76758C24A1A01B9BE958CE8B425FD256_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_76758C24A1A01B9BE958CE8B425FD256" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Estimated Useful Lives</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_76758C24A1A01B9BE958CE8B425FD256" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_76758C24A1A01B9BE958CE8B425FD256" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_76758C24A1A01B9BE958CE8B425FD256" xlink:type="arc" />
    <link:label id="lab_colb_FederalHomeLoanBankstockparvalue_306B9F07A17FC0086239CE8B425FCD1C_terseLabel_en-US" xlink:label="lab_colb_FederalHomeLoanBankstockparvalue_306B9F07A17FC0086239CE8B425FCD1C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank stock, par value</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankstockparvalue_306B9F07A17FC0086239CE8B425FCD1C_label_en-US" xlink:label="lab_colb_FederalHomeLoanBankstockparvalue_306B9F07A17FC0086239CE8B425FCD1C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank stock, par value</link:label>
    <link:label id="lab_colb_FederalHomeLoanBankstockparvalue_306B9F07A17FC0086239CE8B425FCD1C_documentation_en-US" xlink:label="lab_colb_FederalHomeLoanBankstockparvalue_306B9F07A17FC0086239CE8B425FCD1C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank stock, par value</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalHomeLoanBankstockparvalue" xlink:label="loc_colb_FederalHomeLoanBankstockparvalue_306B9F07A17FC0086239CE8B425FCD1C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalHomeLoanBankstockparvalue_306B9F07A17FC0086239CE8B425FCD1C" xlink:to="lab_colb_FederalHomeLoanBankstockparvalue_306B9F07A17FC0086239CE8B425FCD1C" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementAbstract_F84096E65A116040DEFC0803C05792F1_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract_F84096E65A116040DEFC0803C05792F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_F84096E65A116040DEFC0803C05792F1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract_F84096E65A116040DEFC0803C05792F1" xlink:to="lab_us-gaap_IncomeStatementAbstract_F84096E65A116040DEFC0803C05792F1" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndDividendIncomeOperatingAbstract_A37BDA8CA76D7D505FE90803C0570728_terseLabel_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeOperatingAbstract_A37BDA8CA76D7D505FE90803C0570728" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Income</link:label>
    <link:label id="lab_us-gaap_InterestAndDividendIncomeOperatingAbstract_A37BDA8CA76D7D505FE90803C0570728_label_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeOperatingAbstract_A37BDA8CA76D7D505FE90803C0570728" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Dividend Income, Operating [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndDividendIncomeOperatingAbstract" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_A37BDA8CA76D7D505FE90803C0570728" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_A37BDA8CA76D7D505FE90803C0570728" xlink:to="lab_us-gaap_InterestAndDividendIncomeOperatingAbstract_A37BDA8CA76D7D505FE90803C0570728" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndFeeIncomeLoansAndLeases_11A062DD249A83905BB10803C05788D7_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestAndFeeIncomeLoansAndLeases_11A062DD249A83905BB10803C05788D7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Loans</link:label>
    <link:label id="lab_us-gaap_InterestAndFeeIncomeLoansAndLeases_11A062DD249A83905BB10803C05788D7_label_en-US" xlink:label="lab_us-gaap_InterestAndFeeIncomeLoansAndLeases_11A062DD249A83905BB10803C05788D7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Fee Income, Loans and Leases</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeases" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_11A062DD249A83905BB10803C05788D7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_11A062DD249A83905BB10803C05788D7" xlink:to="lab_us-gaap_InterestAndFeeIncomeLoansAndLeases_11A062DD249A83905BB10803C05788D7" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeSecuritiesTaxable_2CD9F2616C57D8B6B3120803C057EBB2_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeSecuritiesTaxable_2CD9F2616C57D8B6B3120803C057EBB2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Taxable securities</link:label>
    <link:label id="lab_us-gaap_InterestIncomeSecuritiesTaxable_2CD9F2616C57D8B6B3120803C057EBB2_label_en-US" xlink:label="lab_us-gaap_InterestIncomeSecuritiesTaxable_2CD9F2616C57D8B6B3120803C057EBB2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income, Securities, Operating, Taxable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeSecuritiesTaxable" xlink:label="loc_us-gaap_InterestIncomeSecuritiesTaxable_2CD9F2616C57D8B6B3120803C057EBB2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeSecuritiesTaxable_2CD9F2616C57D8B6B3120803C057EBB2" xlink:to="lab_us-gaap_InterestIncomeSecuritiesTaxable_2CD9F2616C57D8B6B3120803C057EBB2" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeSecuritiesTaxExempt_874109312352B6A085E80803C057E36B_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeSecuritiesTaxExempt_874109312352B6A085E80803C057E36B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax-exempt securities</link:label>
    <link:label id="lab_us-gaap_InterestIncomeSecuritiesTaxExempt_874109312352B6A085E80803C057E36B_label_en-US" xlink:label="lab_us-gaap_InterestIncomeSecuritiesTaxExempt_874109312352B6A085E80803C057E36B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income, Securities, Operating, Tax Exempt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeSecuritiesTaxExempt" xlink:label="loc_us-gaap_InterestIncomeSecuritiesTaxExempt_874109312352B6A085E80803C057E36B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeSecuritiesTaxExempt_874109312352B6A085E80803C057E36B" xlink:to="lab_us-gaap_InterestIncomeSecuritiesTaxExempt_874109312352B6A085E80803C057E36B" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndDividendIncomeOperating_DFF6AFDD2BCB843BBA670803C05731C4_totalLabel_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeOperating_DFF6AFDD2BCB843BBA670803C05731C4" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total interest income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndDividendIncomeOperating" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_DFF6AFDD2BCB843BBA670803C05731C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_DFF6AFDD2BCB843BBA670803C05731C4" xlink:to="lab_us-gaap_InterestAndDividendIncomeOperating_DFF6AFDD2BCB843BBA670803C05731C4" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseAbstract_28F3B3F383E733F775500803C0575B41_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseAbstract_28F3B3F383E733F775500803C0575B41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Expense</link:label>
    <link:label id="lab_us-gaap_InterestExpenseAbstract_28F3B3F383E733F775500803C0575B41_label_en-US" xlink:label="lab_us-gaap_InterestExpenseAbstract_28F3B3F383E733F775500803C0575B41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseAbstract" xlink:label="loc_us-gaap_InterestExpenseAbstract_28F3B3F383E733F775500803C0575B41" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseAbstract_28F3B3F383E733F775500803C0575B41" xlink:to="lab_us-gaap_InterestExpenseAbstract_28F3B3F383E733F775500803C0575B41" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseDeposits_9F91856415AB613407550803C057D6ED_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseDeposits_9F91856415AB613407550803C057D6ED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deposits</link:label>
    <link:label id="lab_us-gaap_InterestExpenseDeposits_9F91856415AB613407550803C057D6ED_label_en-US" xlink:label="lab_us-gaap_InterestExpenseDeposits_9F91856415AB613407550803C057D6ED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseDeposits" xlink:label="loc_us-gaap_InterestExpenseDeposits_9F91856415AB613407550803C057D6ED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseDeposits_9F91856415AB613407550803C057D6ED" xlink:to="lab_us-gaap_InterestExpenseDeposits_9F91856415AB613407550803C057D6ED" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm_A63B50F6BC36095046170803C057507F_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm_A63B50F6BC36095046170803C057507F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank advances</link:label>
    <link:label id="lab_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm_A63B50F6BC36095046170803C057507F_label_en-US" xlink:label="lab_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm_A63B50F6BC36095046170803C057507F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Long-term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm" xlink:label="loc_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm_A63B50F6BC36095046170803C057507F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm_A63B50F6BC36095046170803C057507F" xlink:to="lab_us-gaap_InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm_A63B50F6BC36095046170803C057507F" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpense_92B8502BF0068CF4B9E50803C057D9F4_totalLabel_en-US" xlink:label="lab_us-gaap_InterestExpense_92B8502BF0068CF4B9E50803C057D9F4" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total interest expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_92B8502BF0068CF4B9E50803C057D9F4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpense_92B8502BF0068CF4B9E50803C057D9F4" xlink:to="lab_us-gaap_InterestExpense_92B8502BF0068CF4B9E50803C057D9F4" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeExpenseNet_AD49B55033F8E9AD7F8E0803C0570C88_totalLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNet_AD49B55033F8E9AD7F8E0803C0570C88" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net Interest Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_AD49B55033F8E9AD7F8E0803C0570C88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_AD49B55033F8E9AD7F8E0803C0570C88" xlink:to="lab_us-gaap_InterestIncomeExpenseNet_AD49B55033F8E9AD7F8E0803C0570C88" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_31394B34D97CB80298E20803C057CB69_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_31394B34D97CB80298E20803C057CB69" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net interest income after provision for loan and lease losses</link:label>
    <link:label id="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_31394B34D97CB80298E20803C057CB69_label_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_31394B34D97CB80298E20803C057CB69" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income (Expense), after Provision for Loan Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss" xlink:label="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_31394B34D97CB80298E20803C057CB69" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_31394B34D97CB80298E20803C057CB69" xlink:to="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_31394B34D97CB80298E20803C057CB69" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestIncomeAbstract_67B375FAEFC91708E40D0803C057CE5B_terseLabel_en-US" xlink:label="lab_us-gaap_NoninterestIncomeAbstract_67B375FAEFC91708E40D0803C057CE5B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noninterest Income</link:label>
    <link:label id="lab_us-gaap_NoninterestIncomeAbstract_67B375FAEFC91708E40D0803C057CE5B_label_en-US" xlink:label="lab_us-gaap_NoninterestIncomeAbstract_67B375FAEFC91708E40D0803C057CE5B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noninterest Income [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestIncomeAbstract" xlink:label="loc_us-gaap_NoninterestIncomeAbstract_67B375FAEFC91708E40D0803C057CE5B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_67B375FAEFC91708E40D0803C057CE5B" xlink:to="lab_us-gaap_NoninterestIncomeAbstract_67B375FAEFC91708E40D0803C057CE5B" xlink:type="arc" />
    <link:label id="lab_colb_Loanrevenue_C7DEBB7B14D51A86667D0803C0578455_terseLabel_en-US" xlink:label="lab_colb_Loanrevenue_C7DEBB7B14D51A86667D0803C0578455" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan revenue</link:label>
    <link:label id="lab_colb_Loanrevenue_C7DEBB7B14D51A86667D0803C0578455_label_en-US" xlink:label="lab_colb_Loanrevenue_C7DEBB7B14D51A86667D0803C0578455" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan revenue</link:label>
    <link:label id="lab_colb_Loanrevenue_C7DEBB7B14D51A86667D0803C0578455_documentation_en-US" xlink:label="lab_colb_Loanrevenue_C7DEBB7B14D51A86667D0803C0578455" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total fees recognized from loan pre-payments, letters of credit, servicing and other miscellaneous fees.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Loanrevenue" xlink:label="loc_colb_Loanrevenue_C7DEBB7B14D51A86667D0803C0578455" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Loanrevenue_C7DEBB7B14D51A86667D0803C0578455" xlink:to="lab_colb_Loanrevenue_C7DEBB7B14D51A86667D0803C0578455" xlink:type="arc" />
    <link:label id="lab_colb_Merchantprocessingrevenue_439B9EAE76AA1D64643D0803C0571C7C_terseLabel_en-US" xlink:label="lab_colb_Merchantprocessingrevenue_439B9EAE76AA1D64643D0803C0571C7C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Merchant processing revenue</link:label>
    <link:label id="lab_colb_Merchantprocessingrevenue_439B9EAE76AA1D64643D0803C0571C7C_label_en-US" xlink:label="lab_colb_Merchantprocessingrevenue_439B9EAE76AA1D64643D0803C0571C7C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Merchant processing revenue</link:label>
    <link:label id="lab_colb_Merchantprocessingrevenue_439B9EAE76AA1D64643D0803C0571C7C_documentation_en-US" xlink:label="lab_colb_Merchantprocessingrevenue_439B9EAE76AA1D64643D0803C0571C7C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of earnings on fees charged to merchants for the cardholder's use of a credit card. Excludes interest income earned on credit card balances, transactions and credit card services including late, over limit, and annual fees.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Merchantprocessingrevenue" xlink:label="loc_colb_Merchantprocessingrevenue_439B9EAE76AA1D64643D0803C0571C7C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Merchantprocessingrevenue_439B9EAE76AA1D64643D0803C0571C7C" xlink:to="lab_colb_Merchantprocessingrevenue_439B9EAE76AA1D64643D0803C0571C7C" xlink:type="arc" />
    <link:label id="lab_us-gaap_BankOwnedLifeInsuranceIncome_0625CDD2CFCC3AB610090803C057FEDC_terseLabel_en-US" xlink:label="lab_us-gaap_BankOwnedLifeInsuranceIncome_0625CDD2CFCC3AB610090803C057FEDC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bank owned life insurance</link:label>
    <link:label id="lab_us-gaap_BankOwnedLifeInsuranceIncome_0625CDD2CFCC3AB610090803C057FEDC_label_en-US" xlink:label="lab_us-gaap_BankOwnedLifeInsuranceIncome_0625CDD2CFCC3AB610090803C057FEDC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bank Owned Life Insurance Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BankOwnedLifeInsuranceIncome" xlink:label="loc_us-gaap_BankOwnedLifeInsuranceIncome_0625CDD2CFCC3AB610090803C057FEDC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BankOwnedLifeInsuranceIncome_0625CDD2CFCC3AB610090803C057FEDC" xlink:to="lab_us-gaap_BankOwnedLifeInsuranceIncome_0625CDD2CFCC3AB610090803C057FEDC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_CD2A645977208284EB530803C0573FD1_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_CD2A645977208284EB530803C0573FD1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment securities gains (losses), net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_CD2A645977208284EB530803C0573FD1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_CD2A645977208284EB530803C0573FD1" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet_CD2A645977208284EB530803C0573FD1" xlink:type="arc" />
    <link:label id="lab_colb_ChangeInFederalDepositInsuranceCorporationLossSharingAsset_805175A564B9D4160E470803C057518D_terseLabel_en-US" xlink:label="lab_colb_ChangeInFederalDepositInsuranceCorporationLossSharingAsset_805175A564B9D4160E470803C057518D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in FDIC loss sharing asset</link:label>
    <link:label id="lab_colb_ChangeInFederalDepositInsuranceCorporationLossSharingAsset_805175A564B9D4160E470803C057518D_label_en-US" xlink:label="lab_colb_ChangeInFederalDepositInsuranceCorporationLossSharingAsset_805175A564B9D4160E470803C057518D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in Federal Deposit Insurance Corporation Loss Sharing Asset</link:label>
    <link:label id="lab_colb_ChangeInFederalDepositInsuranceCorporationLossSharingAsset_805175A564B9D4160E470803C057518D_documentation_en-US" xlink:label="lab_colb_ChangeInFederalDepositInsuranceCorporationLossSharingAsset_805175A564B9D4160E470803C057518D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Change in Federal Deposit Insurance Corporation Loss Sharing Asset</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ChangeInFederalDepositInsuranceCorporationLossSharingAsset" xlink:label="loc_colb_ChangeInFederalDepositInsuranceCorporationLossSharingAsset_805175A564B9D4160E470803C057518D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ChangeInFederalDepositInsuranceCorporationLossSharingAsset_805175A564B9D4160E470803C057518D" xlink:to="lab_colb_ChangeInFederalDepositInsuranceCorporationLossSharingAsset_805175A564B9D4160E470803C057518D" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestIncomeOther_3252E05173B0CCFAC1F30803C057C9AA_terseLabel_en-US" xlink:label="lab_us-gaap_NoninterestIncomeOther_3252E05173B0CCFAC1F30803C057C9AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_NoninterestIncomeOther_3252E05173B0CCFAC1F30803C057C9AA_label_en-US" xlink:label="lab_us-gaap_NoninterestIncomeOther_3252E05173B0CCFAC1F30803C057C9AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noninterest Income, Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestIncomeOther" xlink:label="loc_us-gaap_NoninterestIncomeOther_3252E05173B0CCFAC1F30803C057C9AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestIncomeOther_3252E05173B0CCFAC1F30803C057C9AA" xlink:to="lab_us-gaap_NoninterestIncomeOther_3252E05173B0CCFAC1F30803C057C9AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestIncome_A91D209431F45DFD2A030803C057F170_totalLabel_en-US" xlink:label="lab_us-gaap_NoninterestIncome_A91D209431F45DFD2A030803C057F170" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total noninterest income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestIncome" xlink:label="loc_us-gaap_NoninterestIncome_A91D209431F45DFD2A030803C057F170" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestIncome_A91D209431F45DFD2A030803C057F170" xlink:to="lab_us-gaap_NoninterestIncome_A91D209431F45DFD2A030803C057F170" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestExpenseAbstract_7B27279B54CF98BA05410803C0570CFD_terseLabel_en-US" xlink:label="lab_us-gaap_NoninterestExpenseAbstract_7B27279B54CF98BA05410803C0570CFD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noninterest Expense</link:label>
    <link:label id="lab_us-gaap_NoninterestExpenseAbstract_7B27279B54CF98BA05410803C0570CFD_label_en-US" xlink:label="lab_us-gaap_NoninterestExpenseAbstract_7B27279B54CF98BA05410803C0570CFD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noninterest Expense [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestExpenseAbstract" xlink:label="loc_us-gaap_NoninterestExpenseAbstract_7B27279B54CF98BA05410803C0570CFD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_7B27279B54CF98BA05410803C0570CFD" xlink:to="lab_us-gaap_NoninterestExpenseAbstract_7B27279B54CF98BA05410803C0570CFD" xlink:type="arc" />
    <link:label id="lab_us-gaap_OccupancyNet_82CE22420588478727760803C0576533_terseLabel_en-US" xlink:label="lab_us-gaap_OccupancyNet_82CE22420588478727760803C0576533" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Occupancy</link:label>
    <link:label id="lab_us-gaap_OccupancyNet_82CE22420588478727760803C0576533_label_en-US" xlink:label="lab_us-gaap_OccupancyNet_82CE22420588478727760803C0576533" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Occupancy, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OccupancyNet" xlink:label="loc_us-gaap_OccupancyNet_82CE22420588478727760803C0576533" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OccupancyNet_82CE22420588478727760803C0576533" xlink:to="lab_us-gaap_OccupancyNet_82CE22420588478727760803C0576533" xlink:type="arc" />
    <link:label id="lab_colb_MerchantProcessing_DF0DE7C352DBE6F9D8850803C0577CCE_terseLabel_en-US" xlink:label="lab_colb_MerchantProcessing_DF0DE7C352DBE6F9D8850803C0577CCE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Merchant processing</link:label>
    <link:label id="lab_colb_MerchantProcessing_DF0DE7C352DBE6F9D8850803C0577CCE_label_en-US" xlink:label="lab_colb_MerchantProcessing_DF0DE7C352DBE6F9D8850803C0577CCE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Merchant processing</link:label>
    <link:label id="lab_colb_MerchantProcessing_DF0DE7C352DBE6F9D8850803C0577CCE_documentation_en-US" xlink:label="lab_colb_MerchantProcessing_DF0DE7C352DBE6F9D8850803C0577CCE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Merchant Processing</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_MerchantProcessing" xlink:label="loc_colb_MerchantProcessing_DF0DE7C352DBE6F9D8850803C0577CCE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_MerchantProcessing_DF0DE7C352DBE6F9D8850803C0577CCE" xlink:to="lab_colb_MerchantProcessing_DF0DE7C352DBE6F9D8850803C0577CCE" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdvertisingExpense_A4DCB337FB11CC3527C20803C05721A5_terseLabel_en-US" xlink:label="lab_us-gaap_AdvertisingExpense_A4DCB337FB11CC3527C20803C05721A5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advertising and promotion</link:label>
    <link:label id="lab_us-gaap_AdvertisingExpense_A4DCB337FB11CC3527C20803C05721A5_label_en-US" xlink:label="lab_us-gaap_AdvertisingExpense_A4DCB337FB11CC3527C20803C05721A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Advertising Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdvertisingExpense" xlink:label="loc_us-gaap_AdvertisingExpense_A4DCB337FB11CC3527C20803C05721A5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdvertisingExpense_A4DCB337FB11CC3527C20803C05721A5" xlink:to="lab_us-gaap_AdvertisingExpense_A4DCB337FB11CC3527C20803C05721A5" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommunicationsAndInformationTechnology_FF118CC43E83F5D052260803C0570015_terseLabel_en-US" xlink:label="lab_us-gaap_CommunicationsAndInformationTechnology_FF118CC43E83F5D052260803C0570015" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Data processing</link:label>
    <link:label id="lab_us-gaap_CommunicationsAndInformationTechnology_FF118CC43E83F5D052260803C0570015_label_en-US" xlink:label="lab_us-gaap_CommunicationsAndInformationTechnology_FF118CC43E83F5D052260803C0570015" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Communications and Information Technology</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommunicationsAndInformationTechnology" xlink:label="loc_us-gaap_CommunicationsAndInformationTechnology_FF118CC43E83F5D052260803C0570015" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommunicationsAndInformationTechnology_FF118CC43E83F5D052260803C0570015" xlink:to="lab_us-gaap_CommunicationsAndInformationTechnology_FF118CC43E83F5D052260803C0570015" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProfessionalFees_6F028B5B61296AED5DFC0803C05767B2_terseLabel_en-US" xlink:label="lab_us-gaap_ProfessionalFees_6F028B5B61296AED5DFC0803C05767B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal and professional fees</link:label>
    <link:label id="lab_us-gaap_ProfessionalFees_6F028B5B61296AED5DFC0803C05767B2_label_en-US" xlink:label="lab_us-gaap_ProfessionalFees_6F028B5B61296AED5DFC0803C05767B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Professional Fees</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfessionalFees" xlink:label="loc_us-gaap_ProfessionalFees_6F028B5B61296AED5DFC0803C05767B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfessionalFees_6F028B5B61296AED5DFC0803C05767B2" xlink:to="lab_us-gaap_ProfessionalFees_6F028B5B61296AED5DFC0803C05767B2" xlink:type="arc" />
    <link:label id="lab_colb_TaxesLicensesAndFees_CEFE6DD95567989CB5220803C0575148_terseLabel_en-US" xlink:label="lab_colb_TaxesLicensesAndFees_CEFE6DD95567989CB5220803C0575148" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Taxes, licenses and fees</link:label>
    <link:label id="lab_colb_TaxesLicensesAndFees_CEFE6DD95567989CB5220803C0575148_label_en-US" xlink:label="lab_colb_TaxesLicensesAndFees_CEFE6DD95567989CB5220803C0575148" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Taxes, licenses and fees</link:label>
    <link:label id="lab_colb_TaxesLicensesAndFees_CEFE6DD95567989CB5220803C0575148_documentation_en-US" xlink:label="lab_colb_TaxesLicensesAndFees_CEFE6DD95567989CB5220803C0575148" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Taxes Licenses And Fees</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_TaxesLicensesAndFees" xlink:label="loc_colb_TaxesLicensesAndFees_CEFE6DD95567989CB5220803C0575148" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_TaxesLicensesAndFees_CEFE6DD95567989CB5220803C0575148" xlink:to="lab_colb_TaxesLicensesAndFees_CEFE6DD95567989CB5220803C0575148" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_BCF4FE47986241C5642D0803C067AA44_terseLabel_en-US" xlink:label="lab_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_BCF4FE47986241C5642D0803C067AA44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Regulatory premiums</link:label>
    <link:label id="lab_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_BCF4FE47986241C5642D0803C067AA44_label_en-US" xlink:label="lab_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_BCF4FE47986241C5642D0803C067AA44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Deposit Insurance Corporation Premium Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalDepositInsuranceCorporationPremiumExpense" xlink:label="loc_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_BCF4FE47986241C5642D0803C067AA44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_BCF4FE47986241C5642D0803C067AA44" xlink:to="lab_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_BCF4FE47986241C5642D0803C067AA44" xlink:type="arc" />
    <link:label id="lab_colb_Netcostbenefitofoperationofotherrealestateowned_83E1BAC5F84B6D10F9B30803C0670CB8_terseLabel_en-US" xlink:label="lab_colb_Netcostbenefitofoperationofotherrealestateowned_83E1BAC5F84B6D10F9B30803C0670CB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net cost of operation of other real estate owned</link:label>
    <link:label id="lab_colb_Netcostbenefitofoperationofotherrealestateowned_83E1BAC5F84B6D10F9B30803C0670CB8_label_en-US" xlink:label="lab_colb_Netcostbenefitofoperationofotherrealestateowned_83E1BAC5F84B6D10F9B30803C0670CB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net cost (benefit) of operation of other real estate owned</link:label>
    <link:label id="lab_colb_Netcostbenefitofoperationofotherrealestateowned_83E1BAC5F84B6D10F9B30803C0670CB8_documentation_en-US" xlink:label="lab_colb_Netcostbenefitofoperationofotherrealestateowned_83E1BAC5F84B6D10F9B30803C0670CB8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net cost (benefit) of operation of other real estate owned</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Netcostbenefitofoperationofotherrealestateowned" xlink:label="loc_colb_Netcostbenefitofoperationofotherrealestateowned_83E1BAC5F84B6D10F9B30803C0670CB8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Netcostbenefitofoperationofotherrealestateowned_83E1BAC5F84B6D10F9B30803C0670CB8" xlink:to="lab_colb_Netcostbenefitofoperationofotherrealestateowned_83E1BAC5F84B6D10F9B30803C0670CB8" xlink:type="arc" />
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_DFAA3055BA97AE93E8B40803C06780BE_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_DFAA3055BA97AE93E8B40803C06780BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of intangibles</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_DFAA3055BA97AE93E8B40803C06780BE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfIntangibleAssets_DFAA3055BA97AE93E8B40803C06780BE" xlink:to="lab_us-gaap_AmortizationOfIntangibleAssets_DFAA3055BA97AE93E8B40803C06780BE" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherNoninterestExpense_917396677542A5BC3F720803C0670B29_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNoninterestExpense_917396677542A5BC3F720803C0670B29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNoninterestExpense" xlink:label="loc_us-gaap_OtherNoninterestExpense_917396677542A5BC3F720803C0670B29" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNoninterestExpense_917396677542A5BC3F720803C0670B29" xlink:to="lab_us-gaap_OtherNoninterestExpense_917396677542A5BC3F720803C0670B29" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestExpense_AA69B7DB47DE606636E00803C06724C2_totalLabel_en-US" xlink:label="lab_us-gaap_NoninterestExpense_AA69B7DB47DE606636E00803C06724C2" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total noninterest expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestExpense" xlink:label="loc_us-gaap_NoninterestExpense_AA69B7DB47DE606636E00803C06724C2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestExpense_AA69B7DB47DE606636E00803C06724C2" xlink:to="lab_us-gaap_NoninterestExpense_AA69B7DB47DE606636E00803C06724C2" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1177769759EC16558DF00803C0679B51_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1177769759EC16558DF00803C0679B51" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Income before income taxes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1177769759EC16558DF00803C0679B51" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1177769759EC16558DF00803C0679B51" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_1177769759EC16558DF00803C0679B51" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_051FA2C646138FC7F4850803C0671912_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_051FA2C646138FC7F4850803C0671912" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income tax provision</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_051FA2C646138FC7F4850803C0671912" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_051FA2C646138FC7F4850803C0671912" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_051FA2C646138FC7F4850803C0671912" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLoss_292FB32DEED1AB3CAF340803C06722A6_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_292FB32DEED1AB3CAF340803C06722A6" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_292FB32DEED1AB3CAF340803C06722A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_292FB32DEED1AB3CAF340803C06722A6" xlink:to="lab_us-gaap_NetIncomeLoss_292FB32DEED1AB3CAF340803C06722A6" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8EDD1277877B0333B24B0803C0675182_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8EDD1277877B0333B24B0803C0675182" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average number of diluted common shares outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8EDD1277877B0333B24B0803C0675182" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8EDD1277877B0333B24B0803C0675182" xlink:to="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_8EDD1277877B0333B24B0803C0675182" xlink:type="arc" />
    <link:label id="lab_colb_DocumentAndEntityInformationAbstract_542723E8E32893C012AF2BE771562AF9_label_en-US" xlink:label="lab_colb_DocumentAndEntityInformationAbstract_542723E8E32893C012AF2BE771562AF9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document And Entity Information [Abstract]</link:label>
    <link:label id="lab_colb_DocumentAndEntityInformationAbstract_542723E8E32893C012AF2BE771562AF9_documentation_en-US" xlink:label="lab_colb_DocumentAndEntityInformationAbstract_542723E8E32893C012AF2BE771562AF9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Document And Entity Information [Abstract]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DocumentAndEntityInformationAbstract" xlink:label="loc_colb_DocumentAndEntityInformationAbstract_542723E8E32893C012AF2BE771562AF9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DocumentAndEntityInformationAbstract_542723E8E32893C012AF2BE771562AF9" xlink:to="lab_colb_DocumentAndEntityInformationAbstract_542723E8E32893C012AF2BE771562AF9" xlink:type="arc" />
    <link:label id="lab_dei_DocumentInformationTable_74662E544BC7AC81A3C02BE7715934D1_terseLabel_en-US" xlink:label="lab_dei_DocumentInformationTable_74662E544BC7AC81A3C02BE7715934D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Information [Table]</link:label>
    <link:label id="lab_dei_DocumentInformationTable_74662E544BC7AC81A3C02BE7715934D1_label_en-US" xlink:label="lab_dei_DocumentInformationTable_74662E544BC7AC81A3C02BE7715934D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Information [Table]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentInformationTable" xlink:label="loc_dei_DocumentInformationTable_74662E544BC7AC81A3C02BE7715934D1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationTable_74662E544BC7AC81A3C02BE7715934D1" xlink:to="lab_dei_DocumentInformationTable_74662E544BC7AC81A3C02BE7715934D1" xlink:type="arc" />
    <link:label id="lab_dei_DocumentInformationDocumentAxis_D7E2B5599BD7F689ED322BE7715A013C_terseLabel_en-US" xlink:label="lab_dei_DocumentInformationDocumentAxis_D7E2B5599BD7F689ED322BE7715A013C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Information, Document [Axis]</link:label>
    <link:label id="lab_dei_DocumentInformationDocumentAxis_D7E2B5599BD7F689ED322BE7715A013C_label_en-US" xlink:label="lab_dei_DocumentInformationDocumentAxis_D7E2B5599BD7F689ED322BE7715A013C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Information, Document [Axis]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentInformationDocumentAxis" xlink:label="loc_dei_DocumentInformationDocumentAxis_D7E2B5599BD7F689ED322BE7715A013C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationDocumentAxis_D7E2B5599BD7F689ED322BE7715A013C" xlink:to="lab_dei_DocumentInformationDocumentAxis_D7E2B5599BD7F689ED322BE7715A013C" xlink:type="arc" />
    <link:label id="lab_dei_DocumentDomain_9FD5DD1B25DC17F616692BE7715A2EE4_terseLabel_en-US" xlink:label="lab_dei_DocumentDomain_9FD5DD1B25DC17F616692BE7715A2EE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document [Domain]</link:label>
    <link:label id="lab_dei_DocumentDomain_9FD5DD1B25DC17F616692BE7715A2EE4_label_en-US" xlink:label="lab_dei_DocumentDomain_9FD5DD1B25DC17F616692BE7715A2EE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document [Domain]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentDomain" xlink:label="loc_dei_DocumentDomain_9FD5DD1B25DC17F616692BE7715A2EE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentDomain_9FD5DD1B25DC17F616692BE7715A2EE4" xlink:to="lab_dei_DocumentDomain_9FD5DD1B25DC17F616692BE7715A2EE4" xlink:type="arc" />
    <link:label id="lab_dei_DocumentInformationLineItems_ED636D46D931E912D98A2BE7715B36B4_terseLabel_en-US" xlink:label="lab_dei_DocumentInformationLineItems_ED636D46D931E912D98A2BE7715B36B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Information [Line Items]</link:label>
    <link:label id="lab_dei_DocumentInformationLineItems_ED636D46D931E912D98A2BE7715B36B4_label_en-US" xlink:label="lab_dei_DocumentInformationLineItems_ED636D46D931E912D98A2BE7715B36B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Information [Line Items]</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_ED636D46D931E912D98A2BE7715B36B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentInformationLineItems_ED636D46D931E912D98A2BE7715B36B4" xlink:to="lab_dei_DocumentInformationLineItems_ED636D46D931E912D98A2BE7715B36B4" xlink:type="arc" />
    <link:label id="lab_dei_DocumentType_B58CEDCAAE2248A32E1F2BE7715B636E_terseLabel_en-US" xlink:label="lab_dei_DocumentType_B58CEDCAAE2248A32E1F2BE7715B636E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:label id="lab_dei_DocumentType_B58CEDCAAE2248A32E1F2BE7715B636E_label_en-US" xlink:label="lab_dei_DocumentType_B58CEDCAAE2248A32E1F2BE7715B636E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Type</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_B58CEDCAAE2248A32E1F2BE7715B636E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType_B58CEDCAAE2248A32E1F2BE7715B636E" xlink:to="lab_dei_DocumentType_B58CEDCAAE2248A32E1F2BE7715B636E" xlink:type="arc" />
    <link:label id="lab_dei_AmendmentFlag_63BDB9403940D0CE7DCF2BE7715CB913_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag_63BDB9403940D0CE7DCF2BE7715CB913" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:label id="lab_dei_AmendmentFlag_63BDB9403940D0CE7DCF2BE7715CB913_label_en-US" xlink:label="lab_dei_AmendmentFlag_63BDB9403940D0CE7DCF2BE7715CB913" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amendment Flag</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_63BDB9403940D0CE7DCF2BE7715CB913" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag_63BDB9403940D0CE7DCF2BE7715CB913" xlink:to="lab_dei_AmendmentFlag_63BDB9403940D0CE7DCF2BE7715CB913" xlink:type="arc" />
    <link:label id="lab_dei_EntityEmergingGrowthCompany_3CB8F149C07103272E5C2BE7715CE540_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany_3CB8F149C07103272E5C2BE7715CE540" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:label id="lab_dei_EntityEmergingGrowthCompany_3CB8F149C07103272E5C2BE7715CE540_label_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany_3CB8F149C07103272E5C2BE7715CE540" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Emerging Growth Company</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityEmergingGrowthCompany" xlink:label="loc_dei_EntityEmergingGrowthCompany_3CB8F149C07103272E5C2BE7715CE540" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany_3CB8F149C07103272E5C2BE7715CE540" xlink:to="lab_dei_EntityEmergingGrowthCompany_3CB8F149C07103272E5C2BE7715CE540" xlink:type="arc" />
    <link:label id="lab_dei_EntityShellCompany_38AFBC2ED9AEBC6FC9B02BE772BFA30D_terseLabel_en-US" xlink:label="lab_dei_EntityShellCompany_38AFBC2ED9AEBC6FC9B02BE772BFA30D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Shell Company</link:label>
    <link:label id="lab_dei_EntityShellCompany_38AFBC2ED9AEBC6FC9B02BE772BFA30D_label_en-US" xlink:label="lab_dei_EntityShellCompany_38AFBC2ED9AEBC6FC9B02BE772BFA30D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Shell Company</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityShellCompany" xlink:label="loc_dei_EntityShellCompany_38AFBC2ED9AEBC6FC9B02BE772BFA30D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityShellCompany_38AFBC2ED9AEBC6FC9B02BE772BFA30D" xlink:to="lab_dei_EntityShellCompany_38AFBC2ED9AEBC6FC9B02BE772BFA30D" xlink:type="arc" />
    <link:label id="lab_dei_EntitySmallBusiness_67C307802CF11864841A2BE7715C4CEC_terseLabel_en-US" xlink:label="lab_dei_EntitySmallBusiness_67C307802CF11864841A2BE7715C4CEC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Small Business</link:label>
    <link:label id="lab_dei_EntitySmallBusiness_67C307802CF11864841A2BE7715C4CEC_label_en-US" xlink:label="lab_dei_EntitySmallBusiness_67C307802CF11864841A2BE7715C4CEC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Small Business</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntitySmallBusiness" xlink:label="loc_dei_EntitySmallBusiness_67C307802CF11864841A2BE7715C4CEC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntitySmallBusiness_67C307802CF11864841A2BE7715C4CEC" xlink:to="lab_dei_EntitySmallBusiness_67C307802CF11864841A2BE7715C4CEC" xlink:type="arc" />
    <link:label id="lab_dei_DocumentPeriodEndDate_EF6338676B49352DE2C62BE7715C894F_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate_EF6338676B49352DE2C62BE7715C894F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
    <link:label id="lab_dei_DocumentPeriodEndDate_EF6338676B49352DE2C62BE7715C894F_label_en-US" xlink:label="lab_dei_DocumentPeriodEndDate_EF6338676B49352DE2C62BE7715C894F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Period End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_EF6338676B49352DE2C62BE7715C894F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate_EF6338676B49352DE2C62BE7715C894F" xlink:to="lab_dei_DocumentPeriodEndDate_EF6338676B49352DE2C62BE7715C894F" xlink:type="arc" />
    <link:label id="lab_dei_DocumentFiscalYearFocus_EF722C4DC3339282E77C2BE7715C77DC_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus_EF722C4DC3339282E77C2BE7715C77DC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalYearFocus_EF722C4DC3339282E77C2BE7715C77DC_label_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus_EF722C4DC3339282E77C2BE7715C77DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Fiscal Year Focus</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_EF722C4DC3339282E77C2BE7715C77DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalYearFocus_EF722C4DC3339282E77C2BE7715C77DC" xlink:to="lab_dei_DocumentFiscalYearFocus_EF722C4DC3339282E77C2BE7715C77DC" xlink:type="arc" />
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_897195969C611462FEDC2BE7715CECAE_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus_897195969C611462FEDC2BE7715CECAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_897195969C611462FEDC2BE7715CECAE_label_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus_897195969C611462FEDC2BE7715CECAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Document Fiscal Period Focus</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_897195969C611462FEDC2BE7715CECAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalPeriodFocus_897195969C611462FEDC2BE7715CECAE" xlink:to="lab_dei_DocumentFiscalPeriodFocus_897195969C611462FEDC2BE7715CECAE" xlink:type="arc" />
    <link:label id="lab_dei_EntityRegistrantName_97A21CEF08636B03067A2BE7715DCEA8_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName_97A21CEF08636B03067A2BE7715DCEA8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:label id="lab_dei_EntityRegistrantName_97A21CEF08636B03067A2BE7715DCEA8_label_en-US" xlink:label="lab_dei_EntityRegistrantName_97A21CEF08636B03067A2BE7715DCEA8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Registrant Name</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_97A21CEF08636B03067A2BE7715DCEA8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName_97A21CEF08636B03067A2BE7715DCEA8" xlink:to="lab_dei_EntityRegistrantName_97A21CEF08636B03067A2BE7715DCEA8" xlink:type="arc" />
    <link:label id="lab_dei_EntityCentralIndexKey_0EAD2A8FBD41C2D947E02BE7715DECE4_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey_0EAD2A8FBD41C2D947E02BE7715DECE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:label id="lab_dei_EntityCentralIndexKey_0EAD2A8FBD41C2D947E02BE7715DECE4_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey_0EAD2A8FBD41C2D947E02BE7715DECE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Central Index Key</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_0EAD2A8FBD41C2D947E02BE7715DECE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey_0EAD2A8FBD41C2D947E02BE7715DECE4" xlink:to="lab_dei_EntityCentralIndexKey_0EAD2A8FBD41C2D947E02BE7715DECE4" xlink:type="arc" />
    <link:label id="lab_dei_CurrentFiscalYearEndDate_A3737108354B8596D1BB2BE7715DE9EC_terseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate_A3737108354B8596D1BB2BE7715DE9EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:label id="lab_dei_CurrentFiscalYearEndDate_A3737108354B8596D1BB2BE7715DE9EC_label_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate_A3737108354B8596D1BB2BE7715DE9EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Fiscal Year End Date</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_A3737108354B8596D1BB2BE7715DE9EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CurrentFiscalYearEndDate_A3737108354B8596D1BB2BE7715DE9EC" xlink:to="lab_dei_CurrentFiscalYearEndDate_A3737108354B8596D1BB2BE7715DE9EC" xlink:type="arc" />
    <link:label id="lab_dei_EntityFilerCategory_7EF42048CF7025F7BCCC2BE7715DC2E1_terseLabel_en-US" xlink:label="lab_dei_EntityFilerCategory_7EF42048CF7025F7BCCC2BE7715DC2E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:label id="lab_dei_EntityFilerCategory_7EF42048CF7025F7BCCC2BE7715DC2E1_label_en-US" xlink:label="lab_dei_EntityFilerCategory_7EF42048CF7025F7BCCC2BE7715DC2E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Filer Category</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_7EF42048CF7025F7BCCC2BE7715DC2E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFilerCategory_7EF42048CF7025F7BCCC2BE7715DC2E1" xlink:to="lab_dei_EntityFilerCategory_7EF42048CF7025F7BCCC2BE7715DC2E1" xlink:type="arc" />
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_24EB97D4CAB8AD963ECF2BE7715D19FC_terseLabel_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_24EB97D4CAB8AD963ECF2BE7715D19FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_24EB97D4CAB8AD963ECF2BE7715D19FC_label_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_24EB97D4CAB8AD963ECF2BE7715D19FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Common Stock, Shares Outstanding</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_24EB97D4CAB8AD963ECF2BE7715D19FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCommonStockSharesOutstanding_24EB97D4CAB8AD963ECF2BE7715D19FC" xlink:to="lab_dei_EntityCommonStockSharesOutstanding_24EB97D4CAB8AD963ECF2BE7715D19FC" xlink:type="arc" />
    <link:label id="lab_dei_EntityWellKnownSeasonedIssuer_80DAA611B8FC5B87757D2BE7715D9141_terseLabel_en-US" xlink:label="lab_dei_EntityWellKnownSeasonedIssuer_80DAA611B8FC5B87757D2BE7715D9141" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Well-known Seasoned Issuer</link:label>
    <link:label id="lab_dei_EntityWellKnownSeasonedIssuer_80DAA611B8FC5B87757D2BE7715D9141_label_en-US" xlink:label="lab_dei_EntityWellKnownSeasonedIssuer_80DAA611B8FC5B87757D2BE7715D9141" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Well-known Seasoned Issuer</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_80DAA611B8FC5B87757D2BE7715D9141" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityWellKnownSeasonedIssuer_80DAA611B8FC5B87757D2BE7715D9141" xlink:to="lab_dei_EntityWellKnownSeasonedIssuer_80DAA611B8FC5B87757D2BE7715D9141" xlink:type="arc" />
    <link:label id="lab_dei_EntityVoluntaryFilers_FAAB0E64EC9C009912E62BE7715E9BBC_terseLabel_en-US" xlink:label="lab_dei_EntityVoluntaryFilers_FAAB0E64EC9C009912E62BE7715E9BBC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Voluntary Filers</link:label>
    <link:label id="lab_dei_EntityVoluntaryFilers_FAAB0E64EC9C009912E62BE7715E9BBC_label_en-US" xlink:label="lab_dei_EntityVoluntaryFilers_FAAB0E64EC9C009912E62BE7715E9BBC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Voluntary Filers</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="loc_dei_EntityVoluntaryFilers_FAAB0E64EC9C009912E62BE7715E9BBC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityVoluntaryFilers_FAAB0E64EC9C009912E62BE7715E9BBC" xlink:to="lab_dei_EntityVoluntaryFilers_FAAB0E64EC9C009912E62BE7715E9BBC" xlink:type="arc" />
    <link:label id="lab_dei_EntityCurrentReportingStatus_76AA9B79ED83B8D4DF462BE7715EDBED_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus_76AA9B79ED83B8D4DF462BE7715EDBED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:label id="lab_dei_EntityCurrentReportingStatus_76AA9B79ED83B8D4DF462BE7715EDBED_label_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus_76AA9B79ED83B8D4DF462BE7715EDBED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Current Reporting Status</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="loc_dei_EntityCurrentReportingStatus_76AA9B79ED83B8D4DF462BE7715EDBED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCurrentReportingStatus_76AA9B79ED83B8D4DF462BE7715EDBED" xlink:to="lab_dei_EntityCurrentReportingStatus_76AA9B79ED83B8D4DF462BE7715EDBED" xlink:type="arc" />
    <link:label id="lab_dei_EntityPublicFloat_248234A96F5B31DECF442BE7715E3DAE_terseLabel_en-US" xlink:label="lab_dei_EntityPublicFloat_248234A96F5B31DECF442BE7715E3DAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity Public Float</link:label>
    <link:label id="lab_dei_EntityPublicFloat_248234A96F5B31DECF442BE7715E3DAE_label_en-US" xlink:label="lab_dei_EntityPublicFloat_248234A96F5B31DECF442BE7715E3DAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Entity Public Float</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2018/dei-2018-01-31.xsd#dei_EntityPublicFloat" xlink:label="loc_dei_EntityPublicFloat_248234A96F5B31DECF442BE7715E3DAE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityPublicFloat_248234A96F5B31DECF442BE7715E3DAE" xlink:to="lab_dei_EntityPublicFloat_248234A96F5B31DECF442BE7715E3DAE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_906CF139B59853CEC13B5B4F096FC3B8_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_906CF139B59853CEC13B5B4F096FC3B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Goodwill and Intangible Assets</link:label>
    <link:label id="lab_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_906CF139B59853CEC13B5B4F096FC3B8_label_en-US" xlink:label="lab_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_906CF139B59853CEC13B5B4F096FC3B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Intangible Assets and Goodwill [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_906CF139B59853CEC13B5B4F096FC3B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_906CF139B59853CEC13B5B4F096FC3B8" xlink:to="lab_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_906CF139B59853CEC13B5B4F096FC3B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_F50912EC519A6D279B0C5B4F096F9CFA_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_F50912EC519A6D279B0C5B4F096F9CFA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated Future Amortization Expense of Core Deposit Intangibles</link:label>
    <link:label id="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_F50912EC519A6D279B0C5B4F096F9CFA_label_en-US" xlink:label="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_F50912EC519A6D279B0C5B4F096F9CFA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:label="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_F50912EC519A6D279B0C5B4F096F9CFA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_F50912EC519A6D279B0C5B4F096F9CFA" xlink:to="lab_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_F50912EC519A6D279B0C5B4F096F9CFA" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30C1843370A14C05102806BF563A3C99_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30C1843370A14C05102806BF563A3C99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30C1843370A14C05102806BF563A3C99_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30C1843370A14C05102806BF563A3C99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30C1843370A14C05102806BF563A3C99" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30C1843370A14C05102806BF563A3C99" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_30C1843370A14C05102806BF563A3C99" xlink:type="arc" />
    <link:label id="lab_us-gaap_MeasurementInputTypeAxis_D3413AB1BC846A3EB9D306BF563B4DCD_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeAxis_D3413AB1BC846A3EB9D306BF563B4DCD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Axis]</link:label>
    <link:label id="lab_us-gaap_MeasurementInputTypeAxis_D3413AB1BC846A3EB9D306BF563B4DCD_label_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeAxis_D3413AB1BC846A3EB9D306BF563B4DCD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_D3413AB1BC846A3EB9D306BF563B4DCD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_D3413AB1BC846A3EB9D306BF563B4DCD" xlink:to="lab_us-gaap_MeasurementInputTypeAxis_D3413AB1BC846A3EB9D306BF563B4DCD" xlink:type="arc" />
    <link:label id="lab_us-gaap_MeasurementInputTypeDomain_5C5F8DCCE47DAA83C8A706BF563B858C_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeDomain_5C5F8DCCE47DAA83C8A706BF563B858C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Domain]</link:label>
    <link:label id="lab_us-gaap_MeasurementInputTypeDomain_5C5F8DCCE47DAA83C8A706BF563B858C_label_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeDomain_5C5F8DCCE47DAA83C8A706BF563B858C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_5C5F8DCCE47DAA83C8A706BF563B858C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_5C5F8DCCE47DAA83C8A706BF563B858C" xlink:to="lab_us-gaap_MeasurementInputTypeDomain_5C5F8DCCE47DAA83C8A706BF563B858C" xlink:type="arc" />
    <link:label id="lab_colb_ReceivableByCollateralTypeAxis_5CAD410E3721864974CF06BF563B9A58_terseLabel_en-US" xlink:label="lab_colb_ReceivableByCollateralTypeAxis_5CAD410E3721864974CF06BF563B9A58" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivable by Collateral Type [Axis]</link:label>
    <link:label id="lab_colb_ReceivableByCollateralTypeAxis_5CAD410E3721864974CF06BF563B9A58_label_en-US" xlink:label="lab_colb_ReceivableByCollateralTypeAxis_5CAD410E3721864974CF06BF563B9A58" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivable by Collateral Type [Axis]</link:label>
    <link:label id="lab_colb_ReceivableByCollateralTypeAxis_5CAD410E3721864974CF06BF563B9A58_documentation_en-US" xlink:label="lab_colb_ReceivableByCollateralTypeAxis_5CAD410E3721864974CF06BF563B9A58" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Receivable by Collateral Type [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ReceivableByCollateralTypeAxis" xlink:label="loc_colb_ReceivableByCollateralTypeAxis_5CAD410E3721864974CF06BF563B9A58" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ReceivableByCollateralTypeAxis_5CAD410E3721864974CF06BF563B9A58" xlink:to="lab_colb_ReceivableByCollateralTypeAxis_5CAD410E3721864974CF06BF563B9A58" xlink:type="arc" />
    <link:label id="lab_colb_ReceivableByCollateralTypeDomain_4BECC536F9CCFE45525D06BF563B3A80_terseLabel_en-US" xlink:label="lab_colb_ReceivableByCollateralTypeDomain_4BECC536F9CCFE45525D06BF563B3A80" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivable by Collateral Type [Domain]</link:label>
    <link:label id="lab_colb_ReceivableByCollateralTypeDomain_4BECC536F9CCFE45525D06BF563B3A80_label_en-US" xlink:label="lab_colb_ReceivableByCollateralTypeDomain_4BECC536F9CCFE45525D06BF563B3A80" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivable by Collateral Type [Domain]</link:label>
    <link:label id="lab_colb_ReceivableByCollateralTypeDomain_4BECC536F9CCFE45525D06BF563B3A80_documentation_en-US" xlink:label="lab_colb_ReceivableByCollateralTypeDomain_4BECC536F9CCFE45525D06BF563B3A80" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Receivable by Collateral Type [Domain]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ReceivableByCollateralTypeDomain" xlink:label="loc_colb_ReceivableByCollateralTypeDomain_4BECC536F9CCFE45525D06BF563B3A80" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ReceivableByCollateralTypeDomain_4BECC536F9CCFE45525D06BF563B3A80" xlink:to="lab_colb_ReceivableByCollateralTypeDomain_4BECC536F9CCFE45525D06BF563B3A80" xlink:type="arc" />
    <link:label id="lab_us-gaap_CollateralAxis_0287456C4B7F6E4B2F8506BF563C5B55_terseLabel_en-US" xlink:label="lab_us-gaap_CollateralAxis_0287456C4B7F6E4B2F8506BF563C5B55" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collateral [Axis]</link:label>
    <link:label id="lab_us-gaap_CollateralAxis_0287456C4B7F6E4B2F8506BF563C5B55_label_en-US" xlink:label="lab_us-gaap_CollateralAxis_0287456C4B7F6E4B2F8506BF563C5B55" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Collateral [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CollateralAxis" xlink:label="loc_us-gaap_CollateralAxis_0287456C4B7F6E4B2F8506BF563C5B55" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CollateralAxis_0287456C4B7F6E4B2F8506BF563C5B55" xlink:to="lab_us-gaap_CollateralAxis_0287456C4B7F6E4B2F8506BF563C5B55" xlink:type="arc" />
    <link:label id="lab_us-gaap_CollateralDomain_6FD8B57E812A0609806A06BF563C2067_terseLabel_en-US" xlink:label="lab_us-gaap_CollateralDomain_6FD8B57E812A0609806A06BF563C2067" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collateral [Domain]</link:label>
    <link:label id="lab_us-gaap_CollateralDomain_6FD8B57E812A0609806A06BF563C2067_label_en-US" xlink:label="lab_us-gaap_CollateralDomain_6FD8B57E812A0609806A06BF563C2067" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Collateral [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CollateralDomain" xlink:label="loc_us-gaap_CollateralDomain_6FD8B57E812A0609806A06BF563C2067" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CollateralDomain_6FD8B57E812A0609806A06BF563C2067" xlink:to="lab_us-gaap_CollateralDomain_6FD8B57E812A0609806A06BF563C2067" xlink:type="arc" />
    <link:label id="lab_us-gaap_UncollateralizedMember_B061D41E4DF3CB69222B0700E9396C60_terseLabel_en-US" xlink:label="lab_us-gaap_UncollateralizedMember_B061D41E4DF3CB69222B0700E9396C60" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Uncollateralized [Member]</link:label>
    <link:label id="lab_us-gaap_UncollateralizedMember_B061D41E4DF3CB69222B0700E9396C60_label_en-US" xlink:label="lab_us-gaap_UncollateralizedMember_B061D41E4DF3CB69222B0700E9396C60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Uncollateralized [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UncollateralizedMember" xlink:label="loc_us-gaap_UncollateralizedMember_B061D41E4DF3CB69222B0700E9396C60" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UncollateralizedMember_B061D41E4DF3CB69222B0700E9396C60" xlink:to="lab_us-gaap_UncollateralizedMember_B061D41E4DF3CB69222B0700E9396C60" xlink:type="arc" />
    <link:label id="lab_colb_CollateralDependentMember_14B3D5DFE66DE36BBE4F06BF563CEED8_terseLabel_en-US" xlink:label="lab_colb_CollateralDependentMember_14B3D5DFE66DE36BBE4F06BF563CEED8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collateral-Dependent [Member]</link:label>
    <link:label id="lab_colb_CollateralDependentMember_14B3D5DFE66DE36BBE4F06BF563CEED8_label_en-US" xlink:label="lab_colb_CollateralDependentMember_14B3D5DFE66DE36BBE4F06BF563CEED8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Collateral-Dependent [Member]</link:label>
    <link:label id="lab_colb_CollateralDependentMember_14B3D5DFE66DE36BBE4F06BF563CEED8_documentation_en-US" xlink:label="lab_colb_CollateralDependentMember_14B3D5DFE66DE36BBE4F06BF563CEED8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Collateral-Dependent [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CollateralDependentMember" xlink:label="loc_colb_CollateralDependentMember_14B3D5DFE66DE36BBE4F06BF563CEED8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CollateralDependentMember_14B3D5DFE66DE36BBE4F06BF563CEED8" xlink:to="lab_colb_CollateralDependentMember_14B3D5DFE66DE36BBE4F06BF563CEED8" xlink:type="arc" />
    <link:label id="lab_colb_NotCollateralDependentMember_25BFCFA7E4FA81F44F6E06BF563CC8C7_terseLabel_en-US" xlink:label="lab_colb_NotCollateralDependentMember_25BFCFA7E4FA81F44F6E06BF563CC8C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Not Collateral-Dependent [Member]</link:label>
    <link:label id="lab_colb_NotCollateralDependentMember_25BFCFA7E4FA81F44F6E06BF563CC8C7_label_en-US" xlink:label="lab_colb_NotCollateralDependentMember_25BFCFA7E4FA81F44F6E06BF563CC8C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Not Collateral-Dependent [Member]</link:label>
    <link:label id="lab_colb_NotCollateralDependentMember_25BFCFA7E4FA81F44F6E06BF563CC8C7_documentation_en-US" xlink:label="lab_colb_NotCollateralDependentMember_25BFCFA7E4FA81F44F6E06BF563CC8C7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Not Collateral-Dependent [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_NotCollateralDependentMember" xlink:label="loc_colb_NotCollateralDependentMember_25BFCFA7E4FA81F44F6E06BF563CC8C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_NotCollateralDependentMember_25BFCFA7E4FA81F44F6E06BF563CC8C7" xlink:to="lab_colb_NotCollateralDependentMember_25BFCFA7E4FA81F44F6E06BF563CC8C7" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationTechniqueAxis_8338A0A120CA9A14D29306BF563D886D_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationTechniqueAxis_8338A0A120CA9A14D29306BF563D886D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Valuation Approach and Technique [Axis]</link:label>
    <link:label id="lab_us-gaap_ValuationTechniqueAxis_8338A0A120CA9A14D29306BF563D886D_label_en-US" xlink:label="lab_us-gaap_ValuationTechniqueAxis_8338A0A120CA9A14D29306BF563D886D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Approach and Technique [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationTechniqueAxis" xlink:label="loc_us-gaap_ValuationTechniqueAxis_8338A0A120CA9A14D29306BF563D886D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationTechniqueAxis_8338A0A120CA9A14D29306BF563D886D" xlink:to="lab_us-gaap_ValuationTechniqueAxis_8338A0A120CA9A14D29306BF563D886D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationTechniqueDomain_0E599CD17AF9B56F432606BF563D6727_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationTechniqueDomain_0E599CD17AF9B56F432606BF563D6727" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Valuation Approach and Technique [Domain]</link:label>
    <link:label id="lab_us-gaap_ValuationTechniqueDomain_0E599CD17AF9B56F432606BF563D6727_label_en-US" xlink:label="lab_us-gaap_ValuationTechniqueDomain_0E599CD17AF9B56F432606BF563D6727" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Approach and Technique [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="loc_us-gaap_ValuationTechniqueDomain_0E599CD17AF9B56F432606BF563D6727" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationTechniqueDomain_0E599CD17AF9B56F432606BF563D6727" xlink:to="lab_us-gaap_ValuationTechniqueDomain_0E599CD17AF9B56F432606BF563D6727" xlink:type="arc" />
    <link:label id="lab_us-gaap_MarketApproachValuationTechniqueMember_4A2750186669FD1D98C506BF563D7CC7_terseLabel_en-US" xlink:label="lab_us-gaap_MarketApproachValuationTechniqueMember_4A2750186669FD1D98C506BF563D7CC7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Valuation, Market Approach [Member]</link:label>
    <link:label id="lab_us-gaap_MarketApproachValuationTechniqueMember_4A2750186669FD1D98C506BF563D7CC7_label_en-US" xlink:label="lab_us-gaap_MarketApproachValuationTechniqueMember_4A2750186669FD1D98C506BF563D7CC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation, Market Approach [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MarketApproachValuationTechniqueMember" xlink:label="loc_us-gaap_MarketApproachValuationTechniqueMember_4A2750186669FD1D98C506BF563D7CC7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MarketApproachValuationTechniqueMember_4A2750186669FD1D98C506BF563D7CC7" xlink:to="lab_us-gaap_MarketApproachValuationTechniqueMember_4A2750186669FD1D98C506BF563D7CC7" xlink:type="arc" />
    <link:label id="lab_srt_WeightedAverageMember_2AD264CB96C8ACF34A9906BF5640437B_terseLabel_en-US" xlink:label="lab_srt_WeightedAverageMember_2AD264CB96C8ACF34A9906BF5640437B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted Average [Member]</link:label>
    <link:label id="lab_srt_WeightedAverageMember_2AD264CB96C8ACF34A9906BF5640437B_label_en-US" xlink:label="lab_srt_WeightedAverageMember_2AD264CB96C8ACF34A9906BF5640437B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_WeightedAverageMember" xlink:label="loc_srt_WeightedAverageMember_2AD264CB96C8ACF34A9906BF5640437B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_WeightedAverageMember_2AD264CB96C8ACF34A9906BF5640437B" xlink:to="lab_srt_WeightedAverageMember_2AD264CB96C8ACF34A9906BF5640437B" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_EF275D62A594E0FED0A906BF56419F90_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_EF275D62A594E0FED0A906BF56419F90" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Inputs, Assets, Quantitative Information [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_EF275D62A594E0FED0A906BF56419F90_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_EF275D62A594E0FED0A906BF56419F90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_EF275D62A594E0FED0A906BF56419F90" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_EF275D62A594E0FED0A906BF56419F90" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_EF275D62A594E0FED0A906BF56419F90" xlink:type="arc" />
    <link:label id="lab_colb_ImpairedLoansMeasurementInput_7743DA33B504310C6F4706BF564230CC_terseLabel_en-US" xlink:label="lab_colb_ImpairedLoansMeasurementInput_7743DA33B504310C6F4706BF564230CC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired Loans, Measurement Input</link:label>
    <link:label id="lab_colb_ImpairedLoansMeasurementInput_7743DA33B504310C6F4706BF564230CC_label_en-US" xlink:label="lab_colb_ImpairedLoansMeasurementInput_7743DA33B504310C6F4706BF564230CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Loans, Measurement Input</link:label>
    <link:label id="lab_colb_ImpairedLoansMeasurementInput_7743DA33B504310C6F4706BF564230CC_documentation_en-US" xlink:label="lab_colb_ImpairedLoansMeasurementInput_7743DA33B504310C6F4706BF564230CC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Value of input used to measure Impaired Loans.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_ImpairedLoansMeasurementInput" xlink:label="loc_colb_ImpairedLoansMeasurementInput_7743DA33B504310C6F4706BF564230CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_ImpairedLoansMeasurementInput_7743DA33B504310C6F4706BF564230CC" xlink:to="lab_colb_ImpairedLoansMeasurementInput_7743DA33B504310C6F4706BF564230CC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsAbstract_F7F1639512B53E8992F706BF59DFC554_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_F7F1639512B53E8992F706BF59DFC554" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ASSETS</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_F7F1639512B53E8992F706BF59DFC554" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract_F7F1639512B53E8992F706BF59DFC554" xlink:to="lab_us-gaap_AssetsAbstract_F7F1639512B53E8992F706BF59DFC554" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_BA6CF92F8DC2B613428706BF59DFFF0C_totalLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_BA6CF92F8DC2B613428706BF59DFFF0C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total cash and cash equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_BA6CF92F8DC2B613428706BF59DFFF0C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_BA6CF92F8DC2B613428706BF59DFFF0C" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_BA6CF92F8DC2B613428706BF59DFFF0C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankStock_56C132521526F1034C6506BF59DF1AD4_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankStock_56C132521526F1034C6506BF59DF1AD4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank stock at cost</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankStock_56C132521526F1034C6506BF59DF1AD4_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankStock_56C132521526F1034C6506BF59DF1AD4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankStock" xlink:label="loc_us-gaap_FederalHomeLoanBankStock_56C132521526F1034C6506BF59DF1AD4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankStock_56C132521526F1034C6506BF59DF1AD4" xlink:to="lab_us-gaap_FederalHomeLoanBankStock_56C132521526F1034C6506BF59DF1AD4" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_D01E213AC69EB7E86E5A06BF59DF78F6_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_D01E213AC69EB7E86E5A06BF59DF78F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans held for sale</link:label>
    <link:label id="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_D01E213AC69EB7E86E5A06BF59DF78F6_label_en-US" xlink:label="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_D01E213AC69EB7E86E5A06BF59DF78F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable Held-for-sale, Net, Not Part of Disposal Group</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup" xlink:label="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_D01E213AC69EB7E86E5A06BF59DF78F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_D01E213AC69EB7E86E5A06BF59DF78F6" xlink:to="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_D01E213AC69EB7E86E5A06BF59DF78F6" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_D14A1F9FCC91D6640ADA06BF59DF8D4B_verboseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_D14A1F9FCC91D6640ADA06BF59DF8D4B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Loans, net of unearned income</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_D14A1F9FCC91D6640ADA06BF59DF8D4B_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_D14A1F9FCC91D6640ADA06BF59DF8D4B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Net of Deferred Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_D14A1F9FCC91D6640ADA06BF59DF8D4B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_D14A1F9FCC91D6640ADA06BF59DF8D4B" xlink:to="lab_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_D14A1F9FCC91D6640ADA06BF59DF8D4B" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestReceivable_257586265996791EFCAD06BF59DF263B_terseLabel_en-US" xlink:label="lab_us-gaap_InterestReceivable_257586265996791EFCAD06BF59DF263B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest receivable</link:label>
    <link:label id="lab_us-gaap_InterestReceivable_257586265996791EFCAD06BF59DF263B_label_en-US" xlink:label="lab_us-gaap_InterestReceivable_257586265996791EFCAD06BF59DF263B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestReceivable" xlink:label="loc_us-gaap_InterestReceivable_257586265996791EFCAD06BF59DF263B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestReceivable_257586265996791EFCAD06BF59DF263B" xlink:to="lab_us-gaap_InterestReceivable_257586265996791EFCAD06BF59DF263B" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_82045E2B56F3833D9C5606BF59DF710B_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_82045E2B56F3833D9C5606BF59DF710B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premises and equipment, net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_82045E2B56F3833D9C5606BF59DF710B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_82045E2B56F3833D9C5606BF59DF710B" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_82045E2B56F3833D9C5606BF59DF710B" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealEstateAcquiredThroughForeclosure_6D5F1B6E01022BC901D806BF59DF4837_terseLabel_en-US" xlink:label="lab_us-gaap_RealEstateAcquiredThroughForeclosure_6D5F1B6E01022BC901D806BF59DF4837" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other real estate owned</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RealEstateAcquiredThroughForeclosure" xlink:label="loc_us-gaap_RealEstateAcquiredThroughForeclosure_6D5F1B6E01022BC901D806BF59DF4837" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateAcquiredThroughForeclosure_6D5F1B6E01022BC901D806BF59DF4837" xlink:to="lab_us-gaap_RealEstateAcquiredThroughForeclosure_6D5F1B6E01022BC901D806BF59DF4837" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_B799248084F5872B596906BF59DF8C4B_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_B799248084F5872B596906BF59DF8C4B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other intangible assets, net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_B799248084F5872B596906BF59DF8C4B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_B799248084F5872B596906BF59DF8C4B" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsNet_B799248084F5872B596906BF59DF8C4B" xlink:type="arc" />
    <link:label id="lab_us-gaap_Assets_BD52E71C82B5400FE9CE06BF59DFFB4A_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_BD52E71C82B5400FE9CE06BF59DFFB4A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_BD52E71C82B5400FE9CE06BF59DFFB4A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_BD52E71C82B5400FE9CE06BF59DFFB4A" xlink:to="lab_us-gaap_Assets_BD52E71C82B5400FE9CE06BF59DFFB4A" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_388C2829AE51B748C97506BF59DFEE42_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_388C2829AE51B748C97506BF59DFEE42" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LIABILITIES AND SHAREHOLDERS' EQUITY</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_388C2829AE51B748C97506BF59DFEE42" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_388C2829AE51B748C97506BF59DFEE42" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_388C2829AE51B748C97506BF59DFEE42" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestBearingDepositLiabilities_C7DA9884ADE3258AA71A06BF59DFB554_terseLabel_en-US" xlink:label="lab_us-gaap_NoninterestBearingDepositLiabilities_C7DA9884ADE3258AA71A06BF59DFB554" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noninterest-bearing</link:label>
    <link:label id="lab_us-gaap_NoninterestBearingDepositLiabilities_C7DA9884ADE3258AA71A06BF59DFB554_label_en-US" xlink:label="lab_us-gaap_NoninterestBearingDepositLiabilities_C7DA9884ADE3258AA71A06BF59DFB554" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noninterest-bearing Deposit Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoninterestBearingDepositLiabilities" xlink:label="loc_us-gaap_NoninterestBearingDepositLiabilities_C7DA9884ADE3258AA71A06BF59DFB554" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestBearingDepositLiabilities_C7DA9884ADE3258AA71A06BF59DFB554" xlink:to="lab_us-gaap_NoninterestBearingDepositLiabilities_C7DA9884ADE3258AA71A06BF59DFB554" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestBearingDepositLiabilities_EF5DE1257AEA9BD1063D06BF59DFDCB4_terseLabel_en-US" xlink:label="lab_us-gaap_InterestBearingDepositLiabilities_EF5DE1257AEA9BD1063D06BF59DFDCB4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest-bearing</link:label>
    <link:label id="lab_us-gaap_InterestBearingDepositLiabilities_EF5DE1257AEA9BD1063D06BF59DFDCB4_label_en-US" xlink:label="lab_us-gaap_InterestBearingDepositLiabilities_EF5DE1257AEA9BD1063D06BF59DFDCB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest-bearing Deposit Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestBearingDepositLiabilities" xlink:label="loc_us-gaap_InterestBearingDepositLiabilities_EF5DE1257AEA9BD1063D06BF59DFDCB4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestBearingDepositLiabilities_EF5DE1257AEA9BD1063D06BF59DFDCB4" xlink:to="lab_us-gaap_InterestBearingDepositLiabilities_EF5DE1257AEA9BD1063D06BF59DFDCB4" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankAdvancesLongTerm_EF88B00BD97A551EED5A06BF59DF8702_verboseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankAdvancesLongTerm_EF88B00BD97A551EED5A06BF59DF8702" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank advances</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesLongTerm" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesLongTerm_EF88B00BD97A551EED5A06BF59DF8702" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankAdvancesLongTerm_EF88B00BD97A551EED5A06BF59DF8702" xlink:to="lab_us-gaap_FederalHomeLoanBankAdvancesLongTerm_EF88B00BD97A551EED5A06BF59DF8702" xlink:type="arc" />
    <link:label id="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_9E1EA7B292DD51D1A8AA06BF59DF9026_verboseLabel_en-US" xlink:label="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_9E1EA7B292DD51D1A8AA06BF59DF9026" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Securities sold under agreements to repurchase</link:label>
    <link:label id="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_9E1EA7B292DD51D1A8AA06BF59DF9026_label_en-US" xlink:label="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_9E1EA7B292DD51D1A8AA06BF59DF9026" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities Sold under Agreements to Repurchase</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SecuritiesSoldUnderAgreementsToRepurchase" xlink:label="loc_us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_9E1EA7B292DD51D1A8AA06BF59DF9026" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_9E1EA7B292DD51D1A8AA06BF59DF9026" xlink:to="lab_us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_9E1EA7B292DD51D1A8AA06BF59DF9026" xlink:type="arc" />
    <link:label id="lab_us-gaap_Liabilities_822645201587BAA9EFBA06BF59DF1BA4_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities_822645201587BAA9EFBA06BF59DF1BA4" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_822645201587BAA9EFBA06BF59DF1BA4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities_822645201587BAA9EFBA06BF59DF1BA4" xlink:to="lab_us-gaap_Liabilities_822645201587BAA9EFBA06BF59DF1BA4" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_70889799B2032D26A2F206BF59DFC4F2_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_70889799B2032D26A2F206BF59DFC4F2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments and contingent liabilities</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_70889799B2032D26A2F206BF59DFC4F2_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_70889799B2032D26A2F206BF59DFC4F2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_70889799B2032D26A2F206BF59DFC4F2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingencies_70889799B2032D26A2F206BF59DFC4F2" xlink:to="lab_us-gaap_CommitmentsAndContingencies_70889799B2032D26A2F206BF59DFC4F2" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_5EA6F775C1E74ED4D02806BF59DFBA2F_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_5EA6F775C1E74ED4D02806BF59DFBA2F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shareholders' equity:</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_5EA6F775C1E74ED4D02806BF59DFBA2F_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_5EA6F775C1E74ED4D02806BF59DFBA2F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_5EA6F775C1E74ED4D02806BF59DFBA2F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityAbstract_5EA6F775C1E74ED4D02806BF59DFBA2F" xlink:to="lab_us-gaap_StockholdersEquityAbstract_5EA6F775C1E74ED4D02806BF59DFBA2F" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockSharesAuthorized_EB87B2E0626A5008044506BF59DFF2B3_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized_EB87B2E0626A5008044506BF59DFF2B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred Stock, Shares Authorized</link:label>
    <link:label id="lab_us-gaap_PreferredStockSharesAuthorized_EB87B2E0626A5008044506BF59DFF2B3_label_en-US" xlink:label="lab_us-gaap_PreferredStockSharesAuthorized_EB87B2E0626A5008044506BF59DFF2B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_EB87B2E0626A5008044506BF59DFF2B3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockSharesAuthorized_EB87B2E0626A5008044506BF59DFF2B3" xlink:to="lab_us-gaap_PreferredStockSharesAuthorized_EB87B2E0626A5008044506BF59DFF2B3" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_5BD5BE2E5CC30C551D3A06BF59DF6D7D_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized_5BD5BE2E5CC30C551D3A06BF59DF6D7D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common stock Authorized shares</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_5BD5BE2E5CC30C551D3A06BF59DF6D7D_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized_5BD5BE2E5CC30C551D3A06BF59DF6D7D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_5BD5BE2E5CC30C551D3A06BF59DF6D7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesAuthorized_5BD5BE2E5CC30C551D3A06BF59DF6D7D" xlink:to="lab_us-gaap_CommonStockSharesAuthorized_5BD5BE2E5CC30C551D3A06BF59DF6D7D" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockValue_382A3605A2FF7E634E5206BF59DF9B76_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue_382A3605A2FF7E634E5206BF59DF9B76" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Stock (no par value)</link:label>
    <link:label id="lab_us-gaap_CommonStockValue_382A3605A2FF7E634E5206BF59DF9B76_label_en-US" xlink:label="lab_us-gaap_CommonStockValue_382A3605A2FF7E634E5206BF59DF9B76" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Value, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_382A3605A2FF7E634E5206BF59DF9B76" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockValue_382A3605A2FF7E634E5206BF59DF9B76" xlink:to="lab_us-gaap_CommonStockValue_382A3605A2FF7E634E5206BF59DF9B76" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_3B501A68505687571E7206BF59DF9709_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_3B501A68505687571E7206BF59DF9709" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained earnings</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_3B501A68505687571E7206BF59DF9709_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_3B501A68505687571E7206BF59DF9709" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings (Accumulated Deficit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_3B501A68505687571E7206BF59DF9709" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsAccumulatedDeficit_3B501A68505687571E7206BF59DF9709" xlink:to="lab_us-gaap_RetainedEarningsAccumulatedDeficit_3B501A68505687571E7206BF59DF9709" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_05A1F6928D85E32E6D9906BF59DF7608_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_05A1F6928D85E32E6D9906BF59DF7608" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total shareholders' equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_05A1F6928D85E32E6D9906BF59DF7608" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_05A1F6928D85E32E6D9906BF59DF7608" xlink:to="lab_us-gaap_StockholdersEquity_05A1F6928D85E32E6D9906BF59DF7608" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_9E4776122B0E686E272E06BF59DF5086_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_9E4776122B0E686E272E06BF59DF5086" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total Liabilities and Shareholders' Equity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_9E4776122B0E686E272E06BF59DF5086" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_9E4776122B0E686E272E06BF59DF5086" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquity_9E4776122B0E686E272E06BF59DF5086" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxDisclosureAbstract_DD29351F9CE8C69D4C58E920D68B58D1_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureAbstract_DD29351F9CE8C69D4C58E920D68B58D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_DD29351F9CE8C69D4C58E920D68B58D1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_DD29351F9CE8C69D4C58E920D68B58D1" xlink:to="lab_us-gaap_IncomeTaxDisclosureAbstract_DD29351F9CE8C69D4C58E920D68B58D1" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxContingencyTable_BE19F2411457933DBDB2E920D68BBA15_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxContingencyTable_BE19F2411457933DBDB2E920D68BBA15" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Contingency [Table]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxContingencyTable_BE19F2411457933DBDB2E920D68BBA15_label_en-US" xlink:label="lab_us-gaap_IncomeTaxContingencyTable_BE19F2411457933DBDB2E920D68BBA15" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Contingency [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxContingencyTable" xlink:label="loc_us-gaap_IncomeTaxContingencyTable_BE19F2411457933DBDB2E920D68BBA15" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_BE19F2411457933DBDB2E920D68BBA15" xlink:to="lab_us-gaap_IncomeTaxContingencyTable_BE19F2411457933DBDB2E920D68BBA15" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxAuthorityAxis_E1AD365A047FD3304094E920D68B2AD0_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityAxis_E1AD365A047FD3304094E920D68B2AD0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Authority [Axis]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxAuthorityAxis_E1AD365A047FD3304094E920D68B2AD0_label_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityAxis_E1AD365A047FD3304094E920D68B2AD0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Authority [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_E1AD365A047FD3304094E920D68B2AD0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_E1AD365A047FD3304094E920D68B2AD0" xlink:to="lab_us-gaap_IncomeTaxAuthorityAxis_E1AD365A047FD3304094E920D68B2AD0" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxAuthorityDomain_B4F91420F3738F03F5FBE920D68B1ADC_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityDomain_B4F91420F3738F03F5FBE920D68B1ADC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Authority [Domain]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxAuthorityDomain_B4F91420F3738F03F5FBE920D68B1ADC_label_en-US" xlink:label="lab_us-gaap_IncomeTaxAuthorityDomain_B4F91420F3738F03F5FBE920D68B1ADC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Authority [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_B4F91420F3738F03F5FBE920D68B1ADC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_B4F91420F3738F03F5FBE920D68B1ADC" xlink:to="lab_us-gaap_IncomeTaxAuthorityDomain_B4F91420F3738F03F5FBE920D68B1ADC" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxContingencyLineItems_0BBD70A1C99F2C02E166E920D68B3D9C_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxContingencyLineItems_0BBD70A1C99F2C02E166E920D68B3D9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Contingency [Line Items]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxContingencyLineItems_0BBD70A1C99F2C02E166E920D68B3D9C_label_en-US" xlink:label="lab_us-gaap_IncomeTaxContingencyLineItems_0BBD70A1C99F2C02E166E920D68B3D9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Contingency [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxContingencyLineItems" xlink:label="loc_us-gaap_IncomeTaxContingencyLineItems_0BBD70A1C99F2C02E166E920D68B3D9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_0BBD70A1C99F2C02E166E920D68B3D9C" xlink:to="lab_us-gaap_IncomeTaxContingencyLineItems_0BBD70A1C99F2C02E166E920D68B3D9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_CurrentFederalTaxExpenseBenefit_D0A0A3AEE7027F44E260E920D68B39F0_terseLabel_en-US" xlink:label="lab_us-gaap_CurrentFederalTaxExpenseBenefit_D0A0A3AEE7027F44E260E920D68B39F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current Federal Tax Expense (Benefit)</link:label>
    <link:label id="lab_us-gaap_CurrentFederalTaxExpenseBenefit_D0A0A3AEE7027F44E260E920D68B39F0_label_en-US" xlink:label="lab_us-gaap_CurrentFederalTaxExpenseBenefit_D0A0A3AEE7027F44E260E920D68B39F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Federal Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_D0A0A3AEE7027F44E260E920D68B39F0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CurrentFederalTaxExpenseBenefit_D0A0A3AEE7027F44E260E920D68B39F0" xlink:to="lab_us-gaap_CurrentFederalTaxExpenseBenefit_D0A0A3AEE7027F44E260E920D68B39F0" xlink:type="arc" />
    <link:label id="lab_colb_Federaloperatinglosscarryforwardssettobegintoexpirein2024_B6054151F7147E85CB2EE920D68B1109_terseLabel_en-US" xlink:label="lab_colb_Federaloperatinglosscarryforwardssettobegintoexpirein2024_B6054151F7147E85CB2EE920D68B1109" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal operating loss carryforwards, set to begin to expire in 2024</link:label>
    <link:label id="lab_colb_Federaloperatinglosscarryforwardssettobegintoexpirein2024_B6054151F7147E85CB2EE920D68B1109_label_en-US" xlink:label="lab_colb_Federaloperatinglosscarryforwardssettobegintoexpirein2024_B6054151F7147E85CB2EE920D68B1109" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal operating loss carryforwards, set to begin to expire in 2024</link:label>
    <link:label id="lab_colb_Federaloperatinglosscarryforwardssettobegintoexpirein2024_B6054151F7147E85CB2EE920D68B1109_documentation_en-US" xlink:label="lab_colb_Federaloperatinglosscarryforwardssettobegintoexpirein2024_B6054151F7147E85CB2EE920D68B1109" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal operating loss carryforwards, set to begin to expire in 2024</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Federaloperatinglosscarryforwardssettobegintoexpirein2024" xlink:label="loc_colb_Federaloperatinglosscarryforwardssettobegintoexpirein2024_B6054151F7147E85CB2EE920D68B1109" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Federaloperatinglosscarryforwardssettobegintoexpirein2024_B6054151F7147E85CB2EE920D68B1109" xlink:to="lab_colb_Federaloperatinglosscarryforwardssettobegintoexpirein2024_B6054151F7147E85CB2EE920D68B1109" xlink:type="arc" />
    <link:label id="lab_colb_Idahostateoperatinglosscarryforwardssettobegintoexpirein2024_226F441F001684DE2736E920D68B626E_terseLabel_en-US" xlink:label="lab_colb_Idahostateoperatinglosscarryforwardssettobegintoexpirein2024_226F441F001684DE2736E920D68B626E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Idaho state operating loss carryforwards, set to begin to expire in 2024</link:label>
    <link:label id="lab_colb_Idahostateoperatinglosscarryforwardssettobegintoexpirein2024_226F441F001684DE2736E920D68B626E_label_en-US" xlink:label="lab_colb_Idahostateoperatinglosscarryforwardssettobegintoexpirein2024_226F441F001684DE2736E920D68B626E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Idaho state operating loss carryforwards, set to begin to expire in 2024</link:label>
    <link:label id="lab_colb_Idahostateoperatinglosscarryforwardssettobegintoexpirein2024_226F441F001684DE2736E920D68B626E_documentation_en-US" xlink:label="lab_colb_Idahostateoperatinglosscarryforwardssettobegintoexpirein2024_226F441F001684DE2736E920D68B626E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Idaho state operating loss carryforwards, set to begin to expire in 2024</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Idahostateoperatinglosscarryforwardssettobegintoexpirein2024" xlink:label="loc_colb_Idahostateoperatinglosscarryforwardssettobegintoexpirein2024_226F441F001684DE2736E920D68B626E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Idahostateoperatinglosscarryforwardssettobegintoexpirein2024_226F441F001684DE2736E920D68B626E" xlink:to="lab_colb_Idahostateoperatinglosscarryforwardssettobegintoexpirein2024_226F441F001684DE2736E920D68B626E" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_F98D9F2BC8A05F54BA49E920D68B106E_terseLabel_en-US" xlink:label="lab_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_F98D9F2BC8A05F54BA49E920D68B106E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest and penalties on unrecognized tax benefits</link:label>
    <link:label id="lab_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_F98D9F2BC8A05F54BA49E920D68B106E_label_en-US" xlink:label="lab_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_F98D9F2BC8A05F54BA49E920D68B106E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_F98D9F2BC8A05F54BA49E920D68B106E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_F98D9F2BC8A05F54BA49E920D68B106E" xlink:to="lab_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_F98D9F2BC8A05F54BA49E920D68B106E" xlink:type="arc" />
    <link:label id="lab_colb_Oregonstateoperatinglosscarryforwardssettobegintoexpirein2024_0E25132BD528419FC99AE920D68BDFE6_terseLabel_en-US" xlink:label="lab_colb_Oregonstateoperatinglosscarryforwardssettobegintoexpirein2024_0E25132BD528419FC99AE920D68BDFE6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">State operating loss carryforwards, set to begin to expire in 2024</link:label>
    <link:label id="lab_colb_Oregonstateoperatinglosscarryforwardssettobegintoexpirein2024_0E25132BD528419FC99AE920D68BDFE6_label_en-US" xlink:label="lab_colb_Oregonstateoperatinglosscarryforwardssettobegintoexpirein2024_0E25132BD528419FC99AE920D68BDFE6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Oregon state operating loss carryforwards, set to begin to expire in 2024</link:label>
    <link:label id="lab_colb_Oregonstateoperatinglosscarryforwardssettobegintoexpirein2024_0E25132BD528419FC99AE920D68BDFE6_documentation_en-US" xlink:label="lab_colb_Oregonstateoperatinglosscarryforwardssettobegintoexpirein2024_0E25132BD528419FC99AE920D68BDFE6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Oregon state operating loss carryforwards, set to begin to expire in 2024</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Oregonstateoperatinglosscarryforwardssettobegintoexpirein2024" xlink:label="loc_colb_Oregonstateoperatinglosscarryforwardssettobegintoexpirein2024_0E25132BD528419FC99AE920D68BDFE6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Oregonstateoperatinglosscarryforwardssettobegintoexpirein2024_0E25132BD528419FC99AE920D68BDFE6" xlink:to="lab_colb_Oregonstateoperatinglosscarryforwardssettobegintoexpirein2024_0E25132BD528419FC99AE920D68BDFE6" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries_DCA657EF89CC884FD88DE920D68B2F64_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries_DCA657EF89CC884FD88DE920D68B2F64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrecognized tax position</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries_DCA657EF89CC884FD88DE920D68B2F64_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries_DCA657EF89CC884FD88DE920D68B2F64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Domestic Subsidiaries</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries" xlink:label="loc_us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries_DCA657EF89CC884FD88DE920D68B2F64" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries_DCA657EF89CC884FD88DE920D68B2F64" xlink:to="lab_us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfDomesticSubsidiaries_DCA657EF89CC884FD88DE920D68B2F64" xlink:type="arc" />
    <link:label id="lab_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_9230095E830A284575D0E920D68B7387_terseLabel_en-US" xlink:label="lab_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_9230095E830A284575D0E920D68B7387" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current State and Local Tax Expense (Benefit)</link:label>
    <link:label id="lab_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_9230095E830A284575D0E920D68B7387_label_en-US" xlink:label="lab_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_9230095E830A284575D0E920D68B7387" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current State and Local Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_9230095E830A284575D0E920D68B7387" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_9230095E830A284575D0E920D68B7387" xlink:to="lab_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_9230095E830A284575D0E920D68B7387" xlink:type="arc" />
    <link:label id="lab_us-gaap_CurrentIncomeTaxExpenseBenefit_D7181040E8AC099EF617E920D68B1478_terseLabel_en-US" xlink:label="lab_us-gaap_CurrentIncomeTaxExpenseBenefit_D7181040E8AC099EF617E920D68B1478" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current tax (benefit) expense</link:label>
    <link:label id="lab_us-gaap_CurrentIncomeTaxExpenseBenefit_D7181040E8AC099EF617E920D68B1478_label_en-US" xlink:label="lab_us-gaap_CurrentIncomeTaxExpenseBenefit_D7181040E8AC099EF617E920D68B1478" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_D7181040E8AC099EF617E920D68B1478" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_D7181040E8AC099EF617E920D68B1478" xlink:to="lab_us-gaap_CurrentIncomeTaxExpenseBenefit_D7181040E8AC099EF617E920D68B1478" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_7ACE49B5DBFCA1826C15E920D68B8DB5_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_7ACE49B5DBFCA1826C15E920D68B8DB5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred State and Local Income Tax Expense (Benefit)</link:label>
    <link:label id="lab_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_7ACE49B5DBFCA1826C15E920D68B8DB5_label_en-US" xlink:label="lab_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_7ACE49B5DBFCA1826C15E920D68B8DB5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred State and Local Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_7ACE49B5DBFCA1826C15E920D68B8DB5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_7ACE49B5DBFCA1826C15E920D68B8DB5" xlink:to="lab_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_7ACE49B5DBFCA1826C15E920D68B8DB5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A3649F5E3AD969F6FC48E920D68BE904_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A3649F5E3AD969F6FC48E920D68BE904" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Federal Income Tax Expense (Benefit)</link:label>
    <link:label id="lab_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A3649F5E3AD969F6FC48E920D68BE904_label_en-US" xlink:label="lab_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A3649F5E3AD969F6FC48E920D68BE904" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Federal Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A3649F5E3AD969F6FC48E920D68BE904" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A3649F5E3AD969F6FC48E920D68BE904" xlink:to="lab_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_A3649F5E3AD969F6FC48E920D68BE904" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_6B62E0D5DE0B16E320A9E920D68B0384_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_6B62E0D5DE0B16E320A9E920D68B0384" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax expense (benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_6B62E0D5DE0B16E320A9E920D68B0384" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_6B62E0D5DE0B16E320A9E920D68B0384" xlink:to="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_6B62E0D5DE0B16E320A9E920D68B0384" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_DDE7AA2B428C73CBF1AEE920D68B21AA_terseLabel_en-US" xlink:label="lab_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_DDE7AA2B428C73CBF1AEE920D68B21AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax assets:</link:label>
    <link:label id="lab_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_DDE7AA2B428C73CBF1AEE920D68B21AA_label_en-US" xlink:label="lab_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_DDE7AA2B428C73CBF1AEE920D68B21AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Components of Deferred Tax Assets [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComponentsOfDeferredTaxAssetsAbstract" xlink:label="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_DDE7AA2B428C73CBF1AEE920D68B21AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_DDE7AA2B428C73CBF1AEE920D68B21AA" xlink:to="lab_us-gaap_ComponentsOfDeferredTaxAssetsAbstract_DDE7AA2B428C73CBF1AEE920D68B21AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_18D6382051108C9B02F0E920D68B6080_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_18D6382051108C9B02F0E920D68B6080" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for loan and lease losses</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_18D6382051108C9B02F0E920D68B6080_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_18D6382051108C9B02F0E920D68B6080" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Provision for Loan Losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_18D6382051108C9B02F0E920D68B6080" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_18D6382051108C9B02F0E920D68B6080" xlink:to="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_18D6382051108C9B02F0E920D68B6080" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_07C7A244EC3103753B29E920D68B4801_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_07C7A244EC3103753B29E920D68B4801" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental executive retirement plan</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_07C7A244EC3103753B29E920D68B4801_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_07C7A244EC3103753B29E920D68B4801" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_07C7A244EC3103753B29E920D68B4801" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_07C7A244EC3103753B29E920D68B4801" xlink:to="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_07C7A244EC3103753B29E920D68B4801" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_10D570AEB5FA2A656DBDE920D68B29FB_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_10D570AEB5FA2A656DBDE920D68B29FB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock option and restricted stock</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_10D570AEB5FA2A656DBDE920D68B29FB_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_10D570AEB5FA2A656DBDE920D68B29FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_10D570AEB5FA2A656DBDE920D68B29FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_10D570AEB5FA2A656DBDE920D68B29FB" xlink:to="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_10D570AEB5FA2A656DBDE920D68B29FB" xlink:type="arc" />
    <link:label id="lab_colb_DeferredTaxAssetOtherRealEstateOwnedCosts_56EC19FF3565508D1F04E920D68BC9C5_terseLabel_en-US" xlink:label="lab_colb_DeferredTaxAssetOtherRealEstateOwnedCosts_56EC19FF3565508D1F04E920D68BC9C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OREO</link:label>
    <link:label id="lab_colb_DeferredTaxAssetOtherRealEstateOwnedCosts_56EC19FF3565508D1F04E920D68BC9C5_label_en-US" xlink:label="lab_colb_DeferredTaxAssetOtherRealEstateOwnedCosts_56EC19FF3565508D1F04E920D68BC9C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Asset Other Real Estate Owned Costs</link:label>
    <link:label id="lab_colb_DeferredTaxAssetOtherRealEstateOwnedCosts_56EC19FF3565508D1F04E920D68BC9C5_documentation_en-US" xlink:label="lab_colb_DeferredTaxAssetOtherRealEstateOwnedCosts_56EC19FF3565508D1F04E920D68BC9C5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Tax Asset Other Real Estate Owned Costs</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DeferredTaxAssetOtherRealEstateOwnedCosts" xlink:label="loc_colb_DeferredTaxAssetOtherRealEstateOwnedCosts_56EC19FF3565508D1F04E920D68BC9C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DeferredTaxAssetOtherRealEstateOwnedCosts_56EC19FF3565508D1F04E920D68BC9C5" xlink:to="lab_colb_DeferredTaxAssetOtherRealEstateOwnedCosts_56EC19FF3565508D1F04E920D68BC9C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_EBDB9C9A7D3F70A02E3CE920D68B4933_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_EBDB9C9A7D3F70A02E3CE920D68B4933" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nonaccrual interest</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_EBDB9C9A7D3F70A02E3CE920D68B4933_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_EBDB9C9A7D3F70A02E3CE920D68B4933" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_EBDB9C9A7D3F70A02E3CE920D68B4933" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_EBDB9C9A7D3F70A02E3CE920D68B4933" xlink:to="lab_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_EBDB9C9A7D3F70A02E3CE920D68B4933" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross_E792129F00C183FDE9C3E920D68B0CE3_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross_E792129F00C183FDE9C3E920D68B0CE3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross_E792129F00C183FDE9C3E920D68B0CE3_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross_E792129F00C183FDE9C3E920D68B0CE3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross" xlink:label="loc_us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross_E792129F00C183FDE9C3E920D68B0CE3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross_E792129F00C183FDE9C3E920D68B0CE3" xlink:to="lab_us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross_E792129F00C183FDE9C3E920D68B0CE3" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_9618972CFB951197F71CE920D68B7EED_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_9618972CFB951197F71CE920D68B7EED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Operating Loss Carryforwards</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_9618972CFB951197F71CE920D68B7EED_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_9618972CFB951197F71CE920D68B7EED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Operating Loss Carryforwards</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_9618972CFB951197F71CE920D68B7EED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_9618972CFB951197F71CE920D68B7EED" xlink:to="lab_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_9618972CFB951197F71CE920D68B7EED" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsOther_1BA12E8AC1CBEDF2EEF8E920D68B1F69_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOther_1BA12E8AC1CBEDF2EEF8E920D68B1F69" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsOther_1BA12E8AC1CBEDF2EEF8E920D68B1F69_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsOther_1BA12E8AC1CBEDF2EEF8E920D68B1F69" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_1BA12E8AC1CBEDF2EEF8E920D68B1F69" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsOther_1BA12E8AC1CBEDF2EEF8E920D68B1F69" xlink:to="lab_us-gaap_DeferredTaxAssetsOther_1BA12E8AC1CBEDF2EEF8E920D68B1F69" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsGross_73E6B8F897B3C1270EDEE920D68BF6E1_totalLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsGross_73E6B8F897B3C1270EDEE920D68BF6E1" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total deferred tax assets</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsGross_73E6B8F897B3C1270EDEE920D68BF6E1_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsGross_73E6B8F897B3C1270EDEE920D68BF6E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_73E6B8F897B3C1270EDEE920D68BF6E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_73E6B8F897B3C1270EDEE920D68BF6E1" xlink:to="lab_us-gaap_DeferredTaxAssetsGross_73E6B8F897B3C1270EDEE920D68BF6E1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_8666A692859B7A8A68AAE920D68BB54C_terseLabel_en-US" xlink:label="lab_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_8666A692859B7A8A68AAE920D68BB54C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax liabilities:</link:label>
    <link:label id="lab_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_8666A692859B7A8A68AAE920D68BB54C_label_en-US" xlink:label="lab_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_8666A692859B7A8A68AAE920D68BB54C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Components of Deferred Tax Liabilities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract" xlink:label="loc_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_8666A692859B7A8A68AAE920D68BB54C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_8666A692859B7A8A68AAE920D68BB54C" xlink:to="lab_us-gaap_ComponentsOfDeferredTaxLiabilitiesAbstract_8666A692859B7A8A68AAE920D68BB54C" xlink:type="arc" />
    <link:label id="lab_colb_DeferredTaxLiabilitiesAssetPurchaseTaxBasisDifference_80F23362B5819A1A44EFE920D68B0B4A_negatedTerseLabel_en-US" xlink:label="lab_colb_DeferredTaxLiabilitiesAssetPurchaseTaxBasisDifference_80F23362B5819A1A44EFE920D68B0B4A" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Asset purchase tax basis difference</link:label>
    <link:label id="lab_colb_DeferredTaxLiabilitiesAssetPurchaseTaxBasisDifference_80F23362B5819A1A44EFE920D68B0B4A_label_en-US" xlink:label="lab_colb_DeferredTaxLiabilitiesAssetPurchaseTaxBasisDifference_80F23362B5819A1A44EFE920D68B0B4A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities Asset Purchase Tax Basis Difference</link:label>
    <link:label id="lab_colb_DeferredTaxLiabilitiesAssetPurchaseTaxBasisDifference_80F23362B5819A1A44EFE920D68B0B4A_documentation_en-US" xlink:label="lab_colb_DeferredTaxLiabilitiesAssetPurchaseTaxBasisDifference_80F23362B5819A1A44EFE920D68B0B4A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities Asset Purchase Tax Basis Difference</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DeferredTaxLiabilitiesAssetPurchaseTaxBasisDifference" xlink:label="loc_colb_DeferredTaxLiabilitiesAssetPurchaseTaxBasisDifference_80F23362B5819A1A44EFE920D68B0B4A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DeferredTaxLiabilitiesAssetPurchaseTaxBasisDifference_80F23362B5819A1A44EFE920D68B0B4A" xlink:to="lab_colb_DeferredTaxLiabilitiesAssetPurchaseTaxBasisDifference_80F23362B5819A1A44EFE920D68B0B4A" xlink:type="arc" />
    <link:label id="lab_colb_DeferredTaxLiabilitiesStockDividends_91EAB8AEFF3C78140152E920D68BF68A_negatedTerseLabel_en-US" xlink:label="lab_colb_DeferredTaxLiabilitiesStockDividends_91EAB8AEFF3C78140152E920D68BF68A" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">FHLB stock dividends</link:label>
    <link:label id="lab_colb_DeferredTaxLiabilitiesStockDividends_91EAB8AEFF3C78140152E920D68BF68A_label_en-US" xlink:label="lab_colb_DeferredTaxLiabilitiesStockDividends_91EAB8AEFF3C78140152E920D68BF68A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities Stock Dividends</link:label>
    <link:label id="lab_colb_DeferredTaxLiabilitiesStockDividends_91EAB8AEFF3C78140152E920D68BF68A_documentation_en-US" xlink:label="lab_colb_DeferredTaxLiabilitiesStockDividends_91EAB8AEFF3C78140152E920D68BF68A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_DeferredTaxLiabilitiesStockDividends" xlink:label="loc_colb_DeferredTaxLiabilitiesStockDividends_91EAB8AEFF3C78140152E920D68BF68A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_DeferredTaxLiabilitiesStockDividends_91EAB8AEFF3C78140152E920D68BF68A" xlink:to="lab_colb_DeferredTaxLiabilitiesStockDividends_91EAB8AEFF3C78140152E920D68BF68A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_5753F662DC561EFAF671E920D68BE3CF_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_5753F662DC561EFAF671E920D68BE3CF" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Deferred loan fees</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_5753F662DC561EFAF671E920D68BE3CF_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_5753F662DC561EFAF671E920D68BE3CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Deferred Expense, Debt Issuance Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_5753F662DC561EFAF671E920D68BE3CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_5753F662DC561EFAF671E920D68BE3CF" xlink:to="lab_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_5753F662DC561EFAF671E920D68BE3CF" xlink:type="arc" />
    <link:label id="lab_colb_Deferredtaxliabilitiespurchaseaccounting_0A92F3C6747940CA4673E920D68B3B8F_negatedTerseLabel_en-US" xlink:label="lab_colb_Deferredtaxliabilitiespurchaseaccounting_0A92F3C6747940CA4673E920D68B3B8F" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax liabilities, purchase accounting</link:label>
    <link:label id="lab_colb_Deferredtaxliabilitiespurchaseaccounting_0A92F3C6747940CA4673E920D68B3B8F_label_en-US" xlink:label="lab_colb_Deferredtaxliabilitiespurchaseaccounting_0A92F3C6747940CA4673E920D68B3B8F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred tax liabilities, purchase accounting</link:label>
    <link:label id="lab_colb_Deferredtaxliabilitiespurchaseaccounting_0A92F3C6747940CA4673E920D68B3B8F_documentation_en-US" xlink:label="lab_colb_Deferredtaxliabilitiespurchaseaccounting_0A92F3C6747940CA4673E920D68B3B8F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deferred tax liabilities, purchase accounting</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Deferredtaxliabilitiespurchaseaccounting" xlink:label="loc_colb_Deferredtaxliabilitiespurchaseaccounting_0A92F3C6747940CA4673E920D68B3B8F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Deferredtaxliabilitiespurchaseaccounting_0A92F3C6747940CA4673E920D68B3B8F" xlink:to="lab_colb_Deferredtaxliabilitiespurchaseaccounting_0A92F3C6747940CA4673E920D68B3B8F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_2BA1DF48315FCE9A2F28E920D68B978C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_2BA1DF48315FCE9A2F28E920D68B978C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Depreciation</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_2BA1DF48315FCE9A2F28E920D68B978C_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_2BA1DF48315FCE9A2F28E920D68B978C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Property, Plant and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_2BA1DF48315FCE9A2F28E920D68B978C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_2BA1DF48315FCE9A2F28E920D68B978C" xlink:to="lab_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_2BA1DF48315FCE9A2F28E920D68B978C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesOther_E9DA7FA52C6117DADA99E920D68BC522_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesOther_E9DA7FA52C6117DADA99E920D68BC522" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Other</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesOther_E9DA7FA52C6117DADA99E920D68BC522_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesOther_E9DA7FA52C6117DADA99E920D68BC522" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_E9DA7FA52C6117DADA99E920D68BC522" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesOther_E9DA7FA52C6117DADA99E920D68BC522" xlink:to="lab_us-gaap_DeferredTaxLiabilitiesOther_E9DA7FA52C6117DADA99E920D68BC522" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxLiabilities_86F963B5042D1FAC7BFEE920D68BBFCE_totalLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilities_86F963B5042D1FAC7BFEE920D68BBFCE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total deferred tax liabilities</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilities_86F963B5042D1FAC7BFEE920D68BBFCE_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilities_86F963B5042D1FAC7BFEE920D68BBFCE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="loc_us-gaap_DeferredTaxLiabilities_86F963B5042D1FAC7BFEE920D68BBFCE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxLiabilities_86F963B5042D1FAC7BFEE920D68BBFCE" xlink:to="lab_us-gaap_DeferredTaxLiabilities_86F963B5042D1FAC7BFEE920D68BBFCE" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredTaxAssetsLiabilitiesNet_1AB5E963AB53A146BDD9E920D68BD08F_totalLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsLiabilitiesNet_1AB5E963AB53A146BDD9E920D68BD08F" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net deferred tax (liability) asset</link:label>
    <link:label id="lab_us-gaap_DeferredTaxAssetsLiabilitiesNet_1AB5E963AB53A146BDD9E920D68BD08F_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsLiabilitiesNet_1AB5E963AB53A146BDD9E920D68BD08F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_1AB5E963AB53A146BDD9E920D68BD08F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_1AB5E963AB53A146BDD9E920D68BD08F" xlink:to="lab_us-gaap_DeferredTaxAssetsLiabilitiesNet_1AB5E963AB53A146BDD9E920D68BD08F" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_3EC60580A0320CC70F24E920D68B5BC4_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_3EC60580A0320CC70F24E920D68B5BC4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reconciliation of effective income tax rate with federal statutory tax rate</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_3EC60580A0320CC70F24E920D68B5BC4_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_3EC60580A0320CC70F24E920D68B5BC4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Amount [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_3EC60580A0320CC70F24E920D68B5BC4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_3EC60580A0320CC70F24E920D68B5BC4" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_3EC60580A0320CC70F24E920D68B5BC4" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_E2E58B63EBA5644E1ACEE920D68B84A8_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_E2E58B63EBA5644E1ACEE920D68B84A8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income tax based on statutory rate</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_E2E58B63EBA5644E1ACEE920D68B84A8_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_E2E58B63EBA5644E1ACEE920D68B84A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_E2E58B63EBA5644E1ACEE920D68B84A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_E2E58B63EBA5644E1ACEE920D68B84A8" xlink:to="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_E2E58B63EBA5644E1ACEE920D68B84A8" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8971DAFE1E0E0E6DF320E920D68BAA58_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8971DAFE1E0E0E6DF320E920D68BAA58" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income tax based on statutory rate, percent</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8971DAFE1E0E0E6DF320E920D68BAA58_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8971DAFE1E0E0E6DF320E920D68BAA58" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8971DAFE1E0E0E6DF320E920D68BAA58" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8971DAFE1E0E0E6DF320E920D68BAA58" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_8971DAFE1E0E0E6DF320E920D68BAA58" xlink:type="arc" />
    <link:label id="lab_colb_Federalincometaxrate2018_211BDA08EA75F65003E2E920D68BE972_terseLabel_en-US" xlink:label="lab_colb_Federalincometaxrate2018_211BDA08EA75F65003E2E920D68BE972" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal income tax rate 2018</link:label>
    <link:label id="lab_colb_Federalincometaxrate2018_211BDA08EA75F65003E2E920D68BE972_label_en-US" xlink:label="lab_colb_Federalincometaxrate2018_211BDA08EA75F65003E2E920D68BE972" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal income tax rate 2018</link:label>
    <link:label id="lab_colb_Federalincometaxrate2018_211BDA08EA75F65003E2E920D68BE972_documentation_en-US" xlink:label="lab_colb_Federalincometaxrate2018_211BDA08EA75F65003E2E920D68BE972" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal income tax rate 2018</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Federalincometaxrate2018" xlink:label="loc_colb_Federalincometaxrate2018_211BDA08EA75F65003E2E920D68BE972" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Federalincometaxrate2018_211BDA08EA75F65003E2E920D68BE972" xlink:to="lab_colb_Federalincometaxrate2018_211BDA08EA75F65003E2E920D68BE972" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationTaxExemptIncome_3F7C8C960DB4A6F86A85E920D68B6CC7_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationTaxExemptIncome_3F7C8C960DB4A6F86A85E920D68B6CC7" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Tax exempt instrument</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationTaxExemptIncome_3F7C8C960DB4A6F86A85E920D68B6CC7_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationTaxExemptIncome_3F7C8C960DB4A6F86A85E920D68B6CC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxExemptIncome" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxExemptIncome_3F7C8C960DB4A6F86A85E920D68B6CC7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationTaxExemptIncome_3F7C8C960DB4A6F86A85E920D68B6CC7" xlink:to="lab_us-gaap_IncomeTaxReconciliationTaxExemptIncome_3F7C8C960DB4A6F86A85E920D68B6CC7" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_C53ABDE743EDCFA147F6E920D68B7019_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_C53ABDE743EDCFA147F6E920D68B7019" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax exempt instrument, percent</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_C53ABDE743EDCFA147F6E920D68B7019_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_C53ABDE743EDCFA147F6E920D68B7019" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_C53ABDE743EDCFA147F6E920D68B7019" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_C53ABDE743EDCFA147F6E920D68B7019" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_C53ABDE743EDCFA147F6E920D68B7019" xlink:type="arc" />
    <link:label id="lab_colb_IncomeTaxReconciliationLifeInsuranceProceeds_8BA8C702F47748CA3E80E920D68B5513_negatedTerseLabel_en-US" xlink:label="lab_colb_IncomeTaxReconciliationLifeInsuranceProceeds_8BA8C702F47748CA3E80E920D68B5513" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Life insurance proceeds</link:label>
    <link:label id="lab_colb_IncomeTaxReconciliationLifeInsuranceProceeds_8BA8C702F47748CA3E80E920D68B5513_label_en-US" xlink:label="lab_colb_IncomeTaxReconciliationLifeInsuranceProceeds_8BA8C702F47748CA3E80E920D68B5513" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Reconciliation Life Insurance Proceeds</link:label>
    <link:label id="lab_colb_IncomeTaxReconciliationLifeInsuranceProceeds_8BA8C702F47748CA3E80E920D68B5513_documentation_en-US" xlink:label="lab_colb_IncomeTaxReconciliationLifeInsuranceProceeds_8BA8C702F47748CA3E80E920D68B5513" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Income Tax Reconciliation Life Insurance Proceeds</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_IncomeTaxReconciliationLifeInsuranceProceeds" xlink:label="loc_colb_IncomeTaxReconciliationLifeInsuranceProceeds_8BA8C702F47748CA3E80E920D68B5513" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_IncomeTaxReconciliationLifeInsuranceProceeds_8BA8C702F47748CA3E80E920D68B5513" xlink:to="lab_colb_IncomeTaxReconciliationLifeInsuranceProceeds_8BA8C702F47748CA3E80E920D68B5513" xlink:type="arc" />
    <link:label id="lab_colb_EffectiveIncomeTaxRateReconciliationLifeInsuranceProceeds_2899BD38EA863804AA4CE920D68BF4DB_terseLabel_en-US" xlink:label="lab_colb_EffectiveIncomeTaxRateReconciliationLifeInsuranceProceeds_2899BD38EA863804AA4CE920D68BF4DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Life insurance proceeds, percent</link:label>
    <link:label id="lab_colb_EffectiveIncomeTaxRateReconciliationLifeInsuranceProceeds_2899BD38EA863804AA4CE920D68BF4DB_label_en-US" xlink:label="lab_colb_EffectiveIncomeTaxRateReconciliationLifeInsuranceProceeds_2899BD38EA863804AA4CE920D68BF4DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation Life Insurance Proceeds</link:label>
    <link:label id="lab_colb_EffectiveIncomeTaxRateReconciliationLifeInsuranceProceeds_2899BD38EA863804AA4CE920D68BF4DB_documentation_en-US" xlink:label="lab_colb_EffectiveIncomeTaxRateReconciliationLifeInsuranceProceeds_2899BD38EA863804AA4CE920D68BF4DB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation Life Insurance Proceeds</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_EffectiveIncomeTaxRateReconciliationLifeInsuranceProceeds" xlink:label="loc_colb_EffectiveIncomeTaxRateReconciliationLifeInsuranceProceeds_2899BD38EA863804AA4CE920D68BF4DB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_EffectiveIncomeTaxRateReconciliationLifeInsuranceProceeds_2899BD38EA863804AA4CE920D68BF4DB" xlink:to="lab_colb_EffectiveIncomeTaxRateReconciliationLifeInsuranceProceeds_2899BD38EA863804AA4CE920D68BF4DB" xlink:type="arc" />
    <link:label id="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationamount_3661FB10ED5F7FF732A3E920D68B7364_terseLabel_en-US" xlink:label="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationamount_3661FB10ED5F7FF732A3E920D68B7364" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">effective income tax rate reconciliation, nondeductible expense, business combination, amount</link:label>
    <link:label id="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationamount_3661FB10ED5F7FF732A3E920D68B7364_label_en-US" xlink:label="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationamount_3661FB10ED5F7FF732A3E920D68B7364" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">effective income tax rate reconciliation, nondeductible expense, business combination, amount</link:label>
    <link:label id="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationamount_3661FB10ED5F7FF732A3E920D68B7364_documentation_en-US" xlink:label="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationamount_3661FB10ED5F7FF732A3E920D68B7364" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">effective income tax rate reconciliation, nondeductible expense, business combination, amount</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationamount" xlink:label="loc_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationamount_3661FB10ED5F7FF732A3E920D68B7364" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationamount_3661FB10ED5F7FF732A3E920D68B7364" xlink:to="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationamount_3661FB10ED5F7FF732A3E920D68B7364" xlink:type="arc" />
    <link:label id="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationpercent_05AC69D62802B22A935FE920D68B9417_terseLabel_en-US" xlink:label="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationpercent_05AC69D62802B22A935FE920D68B9417" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">effective income tax rate reconciliation, nondeductible expense, business combination, percent</link:label>
    <link:label id="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationpercent_05AC69D62802B22A935FE920D68B9417_label_en-US" xlink:label="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationpercent_05AC69D62802B22A935FE920D68B9417" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">effective income tax rate reconciliation, nondeductible expense, business combination, percent</link:label>
    <link:label id="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationpercent_05AC69D62802B22A935FE920D68B9417_documentation_en-US" xlink:label="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationpercent_05AC69D62802B22A935FE920D68B9417" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">effective income tax rate reconciliation, nondeductible expense, business combination, percent</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationpercent" xlink:label="loc_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationpercent_05AC69D62802B22A935FE920D68B9417" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationpercent_05AC69D62802B22A935FE920D68B9417" xlink:to="lab_colb_Effectiveincometaxratereconciliationnondeductibleexpensebusinesscombinationpercent_05AC69D62802B22A935FE920D68B9417" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_DF0D028EFA4F02AA015CE920D68BF8BF_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_DF0D028EFA4F02AA015CE920D68BF8BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_DF0D028EFA4F02AA015CE920D68BF8BF_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_DF0D028EFA4F02AA015CE920D68BF8BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_DF0D028EFA4F02AA015CE920D68BF8BF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_DF0D028EFA4F02AA015CE920D68BF8BF" xlink:to="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_DF0D028EFA4F02AA015CE920D68BF8BF" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_A398CA63A353F19BDF61E920D68BA597_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_A398CA63A353F19BDF61E920D68BA597" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_A398CA63A353F19BDF61E920D68BA597_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_A398CA63A353F19BDF61E920D68BA597" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_A398CA63A353F19BDF61E920D68BA597" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_A398CA63A353F19BDF61E920D68BA597" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_A398CA63A353F19BDF61E920D68BA597" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_52A80FBC84DA3590F3F0E9241E325623_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_52A80FBC84DA3590F3F0E9241E325623" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_52A80FBC84DA3590F3F0E9241E325623_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_52A80FBC84DA3590F3F0E9241E325623" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_52A80FBC84DA3590F3F0E9241E325623" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_52A80FBC84DA3590F3F0E9241E325623" xlink:to="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_52A80FBC84DA3590F3F0E9241E325623" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_73CE8D7F9D960819D9E3E924CC3D808D_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_73CE8D7F9D960819D9E3E924CC3D808D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_73CE8D7F9D960819D9E3E924CC3D808D_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_73CE8D7F9D960819D9E3E924CC3D808D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_73CE8D7F9D960819D9E3E924CC3D808D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_73CE8D7F9D960819D9E3E924CC3D808D" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_73CE8D7F9D960819D9E3E924CC3D808D" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_7977B216311B44FA939BE920D68B4B09_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_7977B216311B44FA939BE920D68B4B09" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other, net</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_7977B216311B44FA939BE920D68B4B09_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_7977B216311B44FA939BE920D68B4B09" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Other Adjustments, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_7977B216311B44FA939BE920D68B4B09" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_7977B216311B44FA939BE920D68B4B09" xlink:to="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_7977B216311B44FA939BE920D68B4B09" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_60049AED2AA440301A82E920D68B1D81_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_60049AED2AA440301A82E920D68B1D81" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other, net, percent</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_60049AED2AA440301A82E920D68B1D81_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_60049AED2AA440301A82E920D68B1D81" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Other Adjustments, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_60049AED2AA440301A82E920D68B1D81" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_60049AED2AA440301A82E920D68B1D81" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_60049AED2AA440301A82E920D68B1D81" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E6FA2E358E4D755DDC92E920D68B4E36_totalLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E6FA2E358E4D755DDC92E920D68B4E36" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Income tax provision (benefit), percent</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E6FA2E358E4D755DDC92E920D68B4E36_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E6FA2E358E4D755DDC92E920D68B4E36" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E6FA2E358E4D755DDC92E920D68B4E36" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E6FA2E358E4D755DDC92E920D68B4E36" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_E6FA2E358E4D755DDC92E920D68B4E36" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_FD78531CE0976280F3A1751000097871_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock_FD78531CE0976280F3A1751000097871" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Accounting and Measurement</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_FD78531CE0976280F3A1751000097871_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock_FD78531CE0976280F3A1751000097871" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Disclosures [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_FD78531CE0976280F3A1751000097871" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresTextBlock_FD78531CE0976280F3A1751000097871" xlink:to="lab_us-gaap_FairValueDisclosuresTextBlock_FD78531CE0976280F3A1751000097871" xlink:type="arc" />
    <link:label id="lab_colb_SecuritiesPledgedAsCollateralByCounterpartyAxis_F7EDF7BC7DFDAED4C4285C4858352A80_label_en-US" xlink:label="lab_colb_SecuritiesPledgedAsCollateralByCounterpartyAxis_F7EDF7BC7DFDAED4C4285C4858352A80" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities Pledged As Collateral by Counterparty [Axis]</link:label>
    <link:label id="lab_colb_SecuritiesPledgedAsCollateralByCounterpartyAxis_F7EDF7BC7DFDAED4C4285C4858352A80_documentation_en-US" xlink:label="lab_colb_SecuritiesPledgedAsCollateralByCounterpartyAxis_F7EDF7BC7DFDAED4C4285C4858352A80" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Securities Pledged As Collateral by Counterparty [Axis]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_SecuritiesPledgedAsCollateralByCounterpartyAxis" xlink:label="loc_colb_SecuritiesPledgedAsCollateralByCounterpartyAxis_F7EDF7BC7DFDAED4C4285C4858352A80" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_SecuritiesPledgedAsCollateralByCounterpartyAxis_F7EDF7BC7DFDAED4C4285C4858352A80" xlink:to="lab_colb_SecuritiesPledgedAsCollateralByCounterpartyAxis_F7EDF7BC7DFDAED4C4285C4858352A80" xlink:type="arc" />
    <link:label id="lab_colb_SecuritiesPledgedAsCollateralByCounterpartyDomain_C118F63A44E962067C395C485835ACBC_label_en-US" xlink:label="lab_colb_SecuritiesPledgedAsCollateralByCounterpartyDomain_C118F63A44E962067C395C485835ACBC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities Pledged As Collateral by Counterparty [Domain]</link:label>
    <link:label id="lab_colb_SecuritiesPledgedAsCollateralByCounterpartyDomain_C118F63A44E962067C395C485835ACBC_documentation_en-US" xlink:label="lab_colb_SecuritiesPledgedAsCollateralByCounterpartyDomain_C118F63A44E962067C395C485835ACBC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Securities Pledged As Collateral by Counterparty [Domain]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_SecuritiesPledgedAsCollateralByCounterpartyDomain" xlink:label="loc_colb_SecuritiesPledgedAsCollateralByCounterpartyDomain_C118F63A44E962067C395C485835ACBC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_SecuritiesPledgedAsCollateralByCounterpartyDomain_C118F63A44E962067C395C485835ACBC" xlink:to="lab_colb_SecuritiesPledgedAsCollateralByCounterpartyDomain_C118F63A44E962067C395C485835ACBC" xlink:type="arc" />
    <link:label id="lab_colb_WashingtonAndOregonStatePublicDepositsMember_7E98C4A0A1D25A1AE9125C485835EA24_terseLabel_en-US" xlink:label="lab_colb_WashingtonAndOregonStatePublicDepositsMember_7E98C4A0A1D25A1AE9125C485835EA24" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">To Washington and Oregon State To Secure Public Deposits [Member]</link:label>
    <link:label id="lab_colb_WashingtonAndOregonStatePublicDepositsMember_7E98C4A0A1D25A1AE9125C485835EA24_label_en-US" xlink:label="lab_colb_WashingtonAndOregonStatePublicDepositsMember_7E98C4A0A1D25A1AE9125C485835EA24" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Washington and Oregon State Public Deposits [Member]</link:label>
    <link:label id="lab_colb_WashingtonAndOregonStatePublicDepositsMember_7E98C4A0A1D25A1AE9125C485835EA24_documentation_en-US" xlink:label="lab_colb_WashingtonAndOregonStatePublicDepositsMember_7E98C4A0A1D25A1AE9125C485835EA24" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Washington and Oregon State Public Deposits [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_WashingtonAndOregonStatePublicDepositsMember" xlink:label="loc_colb_WashingtonAndOregonStatePublicDepositsMember_7E98C4A0A1D25A1AE9125C485835EA24" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_WashingtonAndOregonStatePublicDepositsMember_7E98C4A0A1D25A1AE9125C485835EA24" xlink:to="lab_colb_WashingtonAndOregonStatePublicDepositsMember_7E98C4A0A1D25A1AE9125C485835EA24" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalReserveBankAdvancesMember_D0D23EA19F01F7F43E665C485835CD1A_terseLabel_en-US" xlink:label="lab_us-gaap_FederalReserveBankAdvancesMember_D0D23EA19F01F7F43E665C485835CD1A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">To Federal Reserve Bank To Secure Borrowings [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalReserveBankAdvancesMember" xlink:label="loc_us-gaap_FederalReserveBankAdvancesMember_D0D23EA19F01F7F43E665C485835CD1A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalReserveBankAdvancesMember_D0D23EA19F01F7F43E665C485835CD1A" xlink:to="lab_us-gaap_FederalReserveBankAdvancesMember_D0D23EA19F01F7F43E665C485835CD1A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleRestricted_5BA0FD4A361AFE93143E5C4858355960_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleRestricted_5BA0FD4A361AFE93143E5C4858355960" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Restricted</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleRestricted_5BA0FD4A361AFE93143E5C4858355960_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleRestricted_5BA0FD4A361AFE93143E5C4858355960" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Restricted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleRestricted" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRestricted_5BA0FD4A361AFE93143E5C4858355960" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleRestricted_5BA0FD4A361AFE93143E5C4858355960" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleRestricted_5BA0FD4A361AFE93143E5C4858355960" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_92DAEA9BC9DB6D32D4865B4F0B1472A3_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_92DAEA9BC9DB6D32D4865B4F0B1472A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Quarterly Financial Information</link:label>
    <link:label id="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_92DAEA9BC9DB6D32D4865B4F0B1472A3_label_en-US" xlink:label="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_92DAEA9BC9DB6D32D4865B4F0B1472A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Quarterly Financial Information [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_92DAEA9BC9DB6D32D4865B4F0B1472A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_92DAEA9BC9DB6D32D4865B4F0B1472A3" xlink:to="lab_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_92DAEA9BC9DB6D32D4865B4F0B1472A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_E0D541E5790FCDBB0C265B4F0828BCB7_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_E0D541E5790FCDBB0C265B4F0828BCB7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Components of Income Tax Expense (Benefit)</link:label>
    <link:label id="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_E0D541E5790FCDBB0C265B4F0828BCB7_label_en-US" xlink:label="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_E0D541E5790FCDBB0C265B4F0828BCB7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_E0D541E5790FCDBB0C265B4F0828BCB7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_E0D541E5790FCDBB0C265B4F0828BCB7" xlink:to="lab_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_E0D541E5790FCDBB0C265B4F0828BCB7" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_B71FFB5DF3E51752E2245B4F0828447E_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_B71FFB5DF3E51752E2245B4F0828447E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Deferred Tax Assets and Liabilities</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_B71FFB5DF3E51752E2245B4F0828447E_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_B71FFB5DF3E51752E2245B4F0828447E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Deferred Tax Assets and Liabilities [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_B71FFB5DF3E51752E2245B4F0828447E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_B71FFB5DF3E51752E2245B4F0828447E" xlink:to="lab_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_B71FFB5DF3E51752E2245B4F0828447E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_1AD573D1533102619CE05B4F0828A5EB_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_1AD573D1533102619CE05B4F0828A5EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Effective Income Tax Rate Reconciliation</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_1AD573D1533102619CE05B4F0828A5EB_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_1AD573D1533102619CE05B4F0828A5EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_1AD573D1533102619CE05B4F0828A5EB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_1AD573D1533102619CE05B4F0828A5EB" xlink:to="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_1AD573D1533102619CE05B4F0828A5EB" xlink:type="arc" />
    <link:label id="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_AE2EF4D60F07006C92405B4F0A885261_terseLabel_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_AE2EF4D60F07006C92405B4F0A885261" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of Significant Accounting Policies</link:label>
    <link:label id="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_AE2EF4D60F07006C92405B4F0A885261_label_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_AE2EF4D60F07006C92405B4F0A885261" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_AE2EF4D60F07006C92405B4F0A885261" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_AE2EF4D60F07006C92405B4F0A885261" xlink:to="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_AE2EF4D60F07006C92405B4F0A885261" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfStockByClassTable_A2CBB0DEEB2AD5F9EA2AF29DA3A26554_label_en-US" xlink:label="lab_us-gaap_ScheduleOfStockByClassTable_A2CBB0DEEB2AD5F9EA2AF29DA3A26554" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Stock by Class [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_A2CBB0DEEB2AD5F9EA2AF29DA3A26554" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_A2CBB0DEEB2AD5F9EA2AF29DA3A26554" xlink:to="lab_us-gaap_ScheduleOfStockByClassTable_A2CBB0DEEB2AD5F9EA2AF29DA3A26554" xlink:type="arc" />
    <link:label id="lab_us-gaap_ClassOfStockLineItems_03928CF75875C119FAD0F29DA3A54486_label_en-US" xlink:label="lab_us-gaap_ClassOfStockLineItems_03928CF75875C119FAD0F29DA3A54486" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Class of Stock [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassOfStockLineItems" xlink:label="loc_us-gaap_ClassOfStockLineItems_03928CF75875C119FAD0F29DA3A54486" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassOfStockLineItems_03928CF75875C119FAD0F29DA3A54486" xlink:to="lab_us-gaap_ClassOfStockLineItems_03928CF75875C119FAD0F29DA3A54486" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_938D314DADFB9C3015F7F29DA3A6705C_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared_938D314DADFB9C3015F7F29DA3A6705C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Declared quarterly cash dividend</link:label>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_938D314DADFB9C3015F7F29DA3A6705C_label_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared_938D314DADFB9C3015F7F29DA3A6705C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Dividends, Per Share, Declared</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_938D314DADFB9C3015F7F29DA3A6705C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockDividendsPerShareDeclared_938D314DADFB9C3015F7F29DA3A6705C" xlink:to="lab_us-gaap_CommonStockDividendsPerShareDeclared_938D314DADFB9C3015F7F29DA3A6705C" xlink:type="arc" />
    <link:label id="lab_colb_CommonStockSpecialCashDividendsPerShareDeclared_DEC143C6A28D56BEAB18F29DA3A6CA48_terseLabel_en-US" xlink:label="lab_colb_CommonStockSpecialCashDividendsPerShareDeclared_DEC143C6A28D56BEAB18F29DA3A6CA48" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common Stock, Special Cash Dividends, Per Share, Declared</link:label>
    <link:label id="lab_colb_CommonStockSpecialCashDividendsPerShareDeclared_DEC143C6A28D56BEAB18F29DA3A6CA48_label_en-US" xlink:label="lab_colb_CommonStockSpecialCashDividendsPerShareDeclared_DEC143C6A28D56BEAB18F29DA3A6CA48" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Special Cash Dividends, Per Share, Declared</link:label>
    <link:label id="lab_colb_CommonStockSpecialCashDividendsPerShareDeclared_DEC143C6A28D56BEAB18F29DA3A6CA48_documentation_en-US" xlink:label="lab_colb_CommonStockSpecialCashDividendsPerShareDeclared_DEC143C6A28D56BEAB18F29DA3A6CA48" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Common Stock, Special Cash Dividends, Per Share, Declared</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_CommonStockSpecialCashDividendsPerShareDeclared" xlink:label="loc_colb_CommonStockSpecialCashDividendsPerShareDeclared_DEC143C6A28D56BEAB18F29DA3A6CA48" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_CommonStockSpecialCashDividendsPerShareDeclared_DEC143C6A28D56BEAB18F29DA3A6CA48" xlink:to="lab_colb_CommonStockSpecialCashDividendsPerShareDeclared_DEC143C6A28D56BEAB18F29DA3A6CA48" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_6546CAE6FF53C4969F3E5B4F08665ECB_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_6546CAE6FF53C4969F3E5B4F08665ECB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restrictions on Cash and Cash Equivalents [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_6546CAE6FF53C4969F3E5B4F08665ECB_label_en-US" xlink:label="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_6546CAE6FF53C4969F3E5B4F08665ECB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restrictions on Cash and Cash Equivalents [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_6546CAE6FF53C4969F3E5B4F08665ECB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_6546CAE6FF53C4969F3E5B4F08665ECB" xlink:to="lab_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_6546CAE6FF53C4969F3E5B4F08665ECB" xlink:type="arc" />
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_24E6BB22572400B8010A5B4F0866CCF2_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_24E6BB22572400B8010A5B4F0866CCF2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted Cash and Cash Equivalents, Cash and Cash Equivalents [Axis]</link:label>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_24E6BB22572400B8010A5B4F0866CCF2_label_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_24E6BB22572400B8010A5B4F0866CCF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash and Cash Equivalents [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_24E6BB22572400B8010A5B4F0866CCF2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_24E6BB22572400B8010A5B4F0866CCF2" xlink:to="lab_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_24E6BB22572400B8010A5B4F0866CCF2" xlink:type="arc" />
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_144B9A566D77EF7017B55B4F08663B8B_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_144B9A566D77EF7017B55B4F08663B8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted Cash and Cash Equivalents, Cash and Cash Equivalents [Domain]</link:label>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_144B9A566D77EF7017B55B4F08663B8B_label_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_144B9A566D77EF7017B55B4F08663B8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_144B9A566D77EF7017B55B4F08663B8B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_144B9A566D77EF7017B55B4F08663B8B" xlink:to="lab_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_144B9A566D77EF7017B55B4F08663B8B" xlink:type="arc" />
    <link:label id="lab_colb_FederalReserveBankMember_ADA98826A9FAD553ED565B4F08667229_terseLabel_en-US" xlink:label="lab_colb_FederalReserveBankMember_ADA98826A9FAD553ED565B4F08667229" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank [Member]</link:label>
    <link:label id="lab_colb_FederalReserveBankMember_ADA98826A9FAD553ED565B4F08667229_label_en-US" xlink:label="lab_colb_FederalReserveBankMember_ADA98826A9FAD553ED565B4F08667229" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank [Member]</link:label>
    <link:label id="lab_colb_FederalReserveBankMember_ADA98826A9FAD553ED565B4F08667229_documentation_en-US" xlink:label="lab_colb_FederalReserveBankMember_ADA98826A9FAD553ED565B4F08667229" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Federal Reserve Bank [Member]</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_FederalReserveBankMember" xlink:label="loc_colb_FederalReserveBankMember_ADA98826A9FAD553ED565B4F08667229" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_FederalReserveBankMember_ADA98826A9FAD553ED565B4F08667229" xlink:to="lab_colb_FederalReserveBankMember_ADA98826A9FAD553ED565B4F08667229" xlink:type="arc" />
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_234FA8C7A26310DF9AD85B4F08669887_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_234FA8C7A26310DF9AD85B4F08669887" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted Cash and Cash Equivalents Items [Line Items]</link:label>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_234FA8C7A26310DF9AD85B4F08669887_label_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_234FA8C7A26310DF9AD85B4F08669887" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash and Cash Equivalents Items [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_234FA8C7A26310DF9AD85B4F08669887" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_234FA8C7A26310DF9AD85B4F08669887" xlink:to="lab_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_234FA8C7A26310DF9AD85B4F08669887" xlink:type="arc" />
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalents_07295F12B361D9D732215B4F0866B97F_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalents_07295F12B361D9D732215B4F0866B97F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted Cash and Cash Equivalents</link:label>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalents_07295F12B361D9D732215B4F0866B97F_label_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalents_07295F12B361D9D732215B4F0866B97F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash and Cash Equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_07295F12B361D9D732215B4F0866B97F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalents_07295F12B361D9D732215B4F0866B97F" xlink:to="lab_us-gaap_RestrictedCashAndCashEquivalents_07295F12B361D9D732215B4F0866B97F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepositLiabilitiesDisclosuresTextBlock_00776FF514789B2BDBA55B4F07F96EC5_terseLabel_en-US" xlink:label="lab_us-gaap_DepositLiabilitiesDisclosuresTextBlock_00776FF514789B2BDBA55B4F07F96EC5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deposits</link:label>
    <link:label id="lab_us-gaap_DepositLiabilitiesDisclosuresTextBlock_00776FF514789B2BDBA55B4F07F96EC5_label_en-US" xlink:label="lab_us-gaap_DepositLiabilitiesDisclosuresTextBlock_00776FF514789B2BDBA55B4F07F96EC5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposit Liabilities Disclosures [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositLiabilitiesDisclosuresTextBlock" xlink:label="loc_us-gaap_DepositLiabilitiesDisclosuresTextBlock_00776FF514789B2BDBA55B4F07F96EC5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositLiabilitiesDisclosuresTextBlock_00776FF514789B2BDBA55B4F07F96EC5" xlink:to="lab_us-gaap_DepositLiabilitiesDisclosuresTextBlock_00776FF514789B2BDBA55B4F07F96EC5" xlink:type="arc" />
    <link:label id="lab_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F8131102588AF19AC4545B4F08B4B797_periodStartLabel_en-US" xlink:label="lab_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F8131102588AF19AC4545B4F08B4B797" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F8131102588AF19AC4545B4F08B4B797_label_en-US" xlink:label="lab_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F8131102588AF19AC4545B4F08B4B797" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance For Unfunded Loan Commitments And Letters Of Credit</link:label>
    <link:label id="lab_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F8131102588AF19AC4545B4F08B4B797_documentation_en-US" xlink:label="lab_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F8131102588AF19AC4545B4F08B4B797" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Allowance For Unfunded Loan Commitments And Letters Of Credit</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit" xlink:label="loc_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F8131102588AF19AC4545B4F08B4B797" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F8131102588AF19AC4545B4F08B4B797" xlink:to="lab_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F8131102588AF19AC4545B4F08B4B797" xlink:type="arc" />
    <link:label id="lab_colb_AllowanceForLoanAndLeaseLossesNetChangesInUnfundedCommitmentsAndLettersOfCreditAllowance_C42B51B93F7C08F6D1345B4F08B46E75_terseLabel_en-US" xlink:label="lab_colb_AllowanceForLoanAndLeaseLossesNetChangesInUnfundedCommitmentsAndLettersOfCreditAllowance_C42B51B93F7C08F6D1345B4F08B46E75" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net changes in the allowance for unfunded commitments and letters of credit</link:label>
    <link:label id="lab_colb_AllowanceForLoanAndLeaseLossesNetChangesInUnfundedCommitmentsAndLettersOfCreditAllowance_C42B51B93F7C08F6D1345B4F08B46E75_label_en-US" xlink:label="lab_colb_AllowanceForLoanAndLeaseLossesNetChangesInUnfundedCommitmentsAndLettersOfCreditAllowance_C42B51B93F7C08F6D1345B4F08B46E75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance</link:label>
    <link:label id="lab_colb_AllowanceForLoanAndLeaseLossesNetChangesInUnfundedCommitmentsAndLettersOfCreditAllowance_C42B51B93F7C08F6D1345B4F08B46E75_documentation_en-US" xlink:label="lab_colb_AllowanceForLoanAndLeaseLossesNetChangesInUnfundedCommitmentsAndLettersOfCreditAllowance_C42B51B93F7C08F6D1345B4F08B46E75" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Allowance for Loan and Lease Losses, Net Changes In Unfunded Commitments and Letters Of Credit Allowance</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AllowanceForLoanAndLeaseLossesNetChangesInUnfundedCommitmentsAndLettersOfCreditAllowance" xlink:label="loc_colb_AllowanceForLoanAndLeaseLossesNetChangesInUnfundedCommitmentsAndLettersOfCreditAllowance_C42B51B93F7C08F6D1345B4F08B46E75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AllowanceForLoanAndLeaseLossesNetChangesInUnfundedCommitmentsAndLettersOfCreditAllowance_C42B51B93F7C08F6D1345B4F08B46E75" xlink:to="lab_colb_AllowanceForLoanAndLeaseLossesNetChangesInUnfundedCommitmentsAndLettersOfCreditAllowance_C42B51B93F7C08F6D1345B4F08B46E75" xlink:type="arc" />
    <link:label id="lab_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F7F1F67B9B0E89C85ED85B4F08B4F07B_periodEndLabel_en-US" xlink:label="lab_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F7F1F67B9B0E89C85ED85B4F08B4F07B" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit" xlink:label="loc_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F7F1F67B9B0E89C85ED85B4F08B4F07B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F7F1F67B9B0E89C85ED85B4F08B4F07B" xlink:to="lab_colb_AllowanceForUnfundedLoanCommitmentsAndLettersOfCredit_F7F1F67B9B0E89C85ED85B4F08B4F07B" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_75C62D74DC8A210690C20758FDF70FEA_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_75C62D74DC8A210690C20758FDF70FEA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax</link:label>
    <link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_75C62D74DC8A210690C20758FDF70FEA_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_75C62D74DC8A210690C20758FDF70FEA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Tax Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_75C62D74DC8A210690C20758FDF70FEA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxDisclosureTextBlock_75C62D74DC8A210690C20758FDF70FEA" xlink:to="lab_us-gaap_IncomeTaxDisclosureTextBlock_75C62D74DC8A210690C20758FDF70FEA" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableCommercialAndIndustrial_6D0DE1BE2964ECD15EF85B4F076CF150_verboseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableCommercialAndIndustrial_6D0DE1BE2964ECD15EF85B4F076CF150" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Commercial Business</link:label>
    <link:label id="lab_us-gaap_LoansReceivableCommercialAndIndustrial_6D0DE1BE2964ECD15EF85B4F076CF150_label_en-US" xlink:label="lab_us-gaap_LoansReceivableCommercialAndIndustrial_6D0DE1BE2964ECD15EF85B4F076CF150" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable, Gross, Commercial and Industrial</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableCommercialAndIndustrial" xlink:label="loc_us-gaap_LoansReceivableCommercialAndIndustrial_6D0DE1BE2964ECD15EF85B4F076CF150" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableCommercialAndIndustrial_6D0DE1BE2964ECD15EF85B4F076CF150" xlink:to="lab_us-gaap_LoansReceivableCommercialAndIndustrial_6D0DE1BE2964ECD15EF85B4F076CF150" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableConsumerMortgage_655929C8D9B99C6B63785B4F076CD802_verboseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableConsumerMortgage_655929C8D9B99C6B63785B4F076CD802" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Real Estate</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableConsumerMortgage_655929C8D9B99C6B63785B4F076CD802_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableConsumerMortgage_655929C8D9B99C6B63785B4F076CD802" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Gross, Consumer, Mortgage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableConsumerMortgage" xlink:label="loc_us-gaap_LoansAndLeasesReceivableConsumerMortgage_655929C8D9B99C6B63785B4F076CD802" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableConsumerMortgage_655929C8D9B99C6B63785B4F076CD802" xlink:to="lab_us-gaap_LoansAndLeasesReceivableConsumerMortgage_655929C8D9B99C6B63785B4F076CD802" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableCommercialMortgage_FA6341B562B9A0C7B74B5B4F076C953B_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableCommercialMortgage_FA6341B562B9A0C7B74B5B4F076C953B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real Estate</link:label>
    <link:label id="lab_us-gaap_LoansReceivableCommercialMortgage_FA6341B562B9A0C7B74B5B4F076C953B_label_en-US" xlink:label="lab_us-gaap_LoansReceivableCommercialMortgage_FA6341B562B9A0C7B74B5B4F076C953B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable, Gross, Commercial, Mortgage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableCommercialMortgage" xlink:label="loc_us-gaap_LoansReceivableCommercialMortgage_FA6341B562B9A0C7B74B5B4F076C953B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableCommercialMortgage_FA6341B562B9A0C7B74B5B4F076C953B" xlink:to="lab_us-gaap_LoansReceivableCommercialMortgage_FA6341B562B9A0C7B74B5B4F076C953B" xlink:type="arc" />
    <link:label id="lab_colb_LoansReceivableRealEstateMortgage_5BCF0A6CFC18A635469B5B4F076C8A32_verboseLabel_en-US" xlink:label="lab_colb_LoansReceivableRealEstateMortgage_5BCF0A6CFC18A635469B5B4F076C8A32" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total Real Estate</link:label>
    <link:label id="lab_colb_LoansReceivableRealEstateMortgage_5BCF0A6CFC18A635469B5B4F076C8A32_label_en-US" xlink:label="lab_colb_LoansReceivableRealEstateMortgage_5BCF0A6CFC18A635469B5B4F076C8A32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable Real Estate Mortgage</link:label>
    <link:label id="lab_colb_LoansReceivableRealEstateMortgage_5BCF0A6CFC18A635469B5B4F076C8A32_documentation_en-US" xlink:label="lab_colb_LoansReceivableRealEstateMortgage_5BCF0A6CFC18A635469B5B4F076C8A32" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Receivable Real Estate Mortgage.</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoansReceivableRealEstateMortgage" xlink:label="loc_colb_LoansReceivableRealEstateMortgage_5BCF0A6CFC18A635469B5B4F076C8A32" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoansReceivableRealEstateMortgage_5BCF0A6CFC18A635469B5B4F076C8A32" xlink:to="lab_colb_LoansReceivableRealEstateMortgage_5BCF0A6CFC18A635469B5B4F076C8A32" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableConsumerConstruction_D643EE29A2A1A0CD92245B4F076CD560_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableConsumerConstruction_D643EE29A2A1A0CD92245B4F076CD560" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real Estate Construction</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableConsumerConstruction_D643EE29A2A1A0CD92245B4F076CD560_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableConsumerConstruction_D643EE29A2A1A0CD92245B4F076CD560" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Gross, Consumer, Construction</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableConsumerConstruction" xlink:label="loc_us-gaap_LoansAndLeasesReceivableConsumerConstruction_D643EE29A2A1A0CD92245B4F076CD560" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableConsumerConstruction_D643EE29A2A1A0CD92245B4F076CD560" xlink:to="lab_us-gaap_LoansAndLeasesReceivableConsumerConstruction_D643EE29A2A1A0CD92245B4F076CD560" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableCommercialConstruction_D3DE114066894B24949E5B4F076C4832_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableCommercialConstruction_D3DE114066894B24949E5B4F076C4832" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real Estate Construction</link:label>
    <link:label id="lab_us-gaap_LoansReceivableCommercialConstruction_D3DE114066894B24949E5B4F076C4832_label_en-US" xlink:label="lab_us-gaap_LoansReceivableCommercialConstruction_D3DE114066894B24949E5B4F076C4832" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable, Gross, Commercial, Construction</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableCommercialConstruction" xlink:label="loc_us-gaap_LoansReceivableCommercialConstruction_D3DE114066894B24949E5B4F076C4832" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableCommercialConstruction_D3DE114066894B24949E5B4F076C4832" xlink:to="lab_us-gaap_LoansReceivableCommercialConstruction_D3DE114066894B24949E5B4F076C4832" xlink:type="arc" />
    <link:label id="lab_colb_LoansReceivableRealEstateConstruction_C5154FED8CA7639816865B4F076C4E10_terseLabel_en-US" xlink:label="lab_colb_LoansReceivableRealEstateConstruction_C5154FED8CA7639816865B4F076C4E10" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Real Estate Construction</link:label>
    <link:label id="lab_colb_LoansReceivableRealEstateConstruction_C5154FED8CA7639816865B4F076C4E10_label_en-US" xlink:label="lab_colb_LoansReceivableRealEstateConstruction_C5154FED8CA7639816865B4F076C4E10" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable Real Estate Construction</link:label>
    <link:label id="lab_colb_LoansReceivableRealEstateConstruction_C5154FED8CA7639816865B4F076C4E10_documentation_en-US" xlink:label="lab_colb_LoansReceivableRealEstateConstruction_C5154FED8CA7639816865B4F076C4E10" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Receivable Real Estate Construction</link:label>
    <link:loc xlink:href="colb-20181231.xsd#colb_LoansReceivableRealEstateConstruction" xlink:label="loc_colb_LoansReceivableRealEstateConstruction_C5154FED8CA7639816865B4F076C4E10" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_colb_LoansReceivableRealEstateConstruction_C5154FED8CA7639816865B4F076C4E10" xlink:to="lab_colb_LoansReceivableRealEstateConstruction_C5154FED8CA7639816865B4F076C4E10" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableConsumerOther_4B507C254F132C5658D85B4F077C4587_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableConsumerOther_4B507C254F132C5658D85B4F077C4587" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Gross, Consumer, Other</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableConsumerOther_4B507C254F132C5658D85B4F077C4587_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableConsumerOther_4B507C254F132C5658D85B4F077C4587" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Gross, Consumer, Other</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableConsumerOther" xlink:label="loc_us-gaap_LoansAndLeasesReceivableConsumerOther_4B507C254F132C5658D85B4F077C4587" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableConsumerOther_4B507C254F132C5658D85B4F077C4587" xlink:to="lab_us-gaap_LoansAndLeasesReceivableConsumerOther_4B507C254F132C5658D85B4F077C4587" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableDeferredIncome_059C8A39AE6B2333FFB35B4F077C4236_negatedLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableDeferredIncome_059C8A39AE6B2333FFB35B4F077C4236" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Less: Net unearned income</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableDeferredIncome_059C8A39AE6B2333FFB35B4F077C4236_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableDeferredIncome_059C8A39AE6B2333FFB35B4F077C4236" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Deferred Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableDeferredIncome" xlink:label="loc_us-gaap_LoansAndLeasesReceivableDeferredIncome_059C8A39AE6B2333FFB35B4F077C4236" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableDeferredIncome_059C8A39AE6B2333FFB35B4F077C4236" xlink:to="lab_us-gaap_LoansAndLeasesReceivableDeferredIncome_059C8A39AE6B2333FFB35B4F077C4236" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_950DE66AA8186C18AC1E5B4F077CF990_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_950DE66AA8186C18AC1E5B4F077CF990" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total loans, net of unearned income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_950DE66AA8186C18AC1E5B4F077CF990" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_950DE66AA8186C18AC1E5B4F077CF990" xlink:to="lab_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_950DE66AA8186C18AC1E5B4F077CF990" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowance_20E38CF94FBBC439419A5B4F077C7130_negatedLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowance_20E38CF94FBBC439419A5B4F077C7130" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Less: Allowance for loan and lease losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowance" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowance_20E38CF94FBBC439419A5B4F077C7130" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowance_20E38CF94FBBC439419A5B4F077C7130" xlink:to="lab_us-gaap_LoansAndLeasesReceivableAllowance_20E38CF94FBBC439419A5B4F077C7130" xlink:type="arc" />
  </link:labelLink>
</link:linkbase>
