<?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_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_98864766874F78B4DB8BC5651FF11404_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_98864766874F78B4DB8BC5651FF11404" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract" xlink:label="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_98864766874F78B4DB8BC5651FF11404" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_98864766874F78B4DB8BC5651FF11404" xlink:to="lab_us-gaap_DebtSecuritiesTradingAndEquitySecuritiesFvNiAbstract_98864766874F78B4DB8BC5651FF11404" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_6DFD1EC6D109AD9AD4E6C5651FF1C0D5_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_6DFD1EC6D109AD9AD4E6C5651FF1C0D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Trading Securities [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_6DFD1EC6D109AD9AD4E6C5651FF1C0D5_label_en-US" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_6DFD1EC6D109AD9AD4E6C5651FF1C0D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Trading, and Equity Securities, FV-NI [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_6DFD1EC6D109AD9AD4E6C5651FF1C0D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_6DFD1EC6D109AD9AD4E6C5651FF1C0D5" xlink:to="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_6DFD1EC6D109AD9AD4E6C5651FF1C0D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancialInstrumentAxis_D06381733081995B3B0CC5651FF25D43_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis_D06381733081995B3B0CC5651FF25D43" 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_D06381733081995B3B0CC5651FF25D43_label_en-US" xlink:label="lab_us-gaap_FinancialInstrumentAxis_D06381733081995B3B0CC5651FF25D43" 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_D06381733081995B3B0CC5651FF25D43" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentAxis_D06381733081995B3B0CC5651FF25D43" xlink:to="lab_us-gaap_FinancialInstrumentAxis_D06381733081995B3B0CC5651FF25D43" xlink:type="arc" />
    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_D90F5E80F5978A02527FC5651FF2C3E8_terseLabel_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_D90F5E80F5978A02527FC5651FF2C3E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Instruments [Domain]</link:label>
    <link:label id="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_D90F5E80F5978A02527FC5651FF2C3E8_label_en-US" xlink:label="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_D90F5E80F5978A02527FC5651FF2C3E8" 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_D90F5E80F5978A02527FC5651FF2C3E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_D90F5E80F5978A02527FC5651FF2C3E8" xlink:to="lab_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_D90F5E80F5978A02527FC5651FF2C3E8" xlink:type="arc" />
    <link:label id="lab_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_B8356A2E7B099987B7A4C5651FF2B473_terseLabel_en-US" xlink:label="lab_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_B8356A2E7B099987B7A4C5651FF2B473" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. government agency residential mortgage-backed securities [Member]</link:label>
    <link:label id="lab_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_B8356A2E7B099987B7A4C5651FF2B473_label_en-US" xlink:label="lab_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_B8356A2E7B099987B7A4C5651FF2B473" 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_B8356A2E7B099987B7A4C5651FF2B473" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_B8356A2E7B099987B7A4C5651FF2B473" xlink:to="lab_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_B8356A2E7B099987B7A4C5651FF2B473" xlink:type="arc" />
    <link:label id="lab_us-gaap_USStatesAndPoliticalSubdivisionsMember_90B0D455D9163C4D1312C5651FF3CC17_terseLabel_en-US" xlink:label="lab_us-gaap_USStatesAndPoliticalSubdivisionsMember_90B0D455D9163C4D1312C5651FF3CC17" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Municipal and other tax-exempt securities [Member]</link:label>
    <link:label id="lab_us-gaap_USStatesAndPoliticalSubdivisionsMember_90B0D455D9163C4D1312C5651FF3CC17_label_en-US" xlink:label="lab_us-gaap_USStatesAndPoliticalSubdivisionsMember_90B0D455D9163C4D1312C5651FF3CC17" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US States and Political Subdivisions 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_USStatesAndPoliticalSubdivisionsMember" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_90B0D455D9163C4D1312C5651FF3CC17" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_90B0D455D9163C4D1312C5651FF3CC17" xlink:to="lab_us-gaap_USStatesAndPoliticalSubdivisionsMember_90B0D455D9163C4D1312C5651FF3CC17" xlink:type="arc" />
    <link:label id="lab_us-gaap_USTreasuryAndGovernmentMember_8A3CB13B4CF5F81BE1C2C5651FF23E78_terseLabel_en-US" xlink:label="lab_us-gaap_USTreasuryAndGovernmentMember_8A3CB13B4CF5F81BE1C2C5651FF23E78" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. government agency debentures [Member]</link:label>
    <link:label id="lab_us-gaap_USTreasuryAndGovernmentMember_8A3CB13B4CF5F81BE1C2C5651FF23E78_label_en-US" xlink:label="lab_us-gaap_USTreasuryAndGovernmentMember_8A3CB13B4CF5F81BE1C2C5651FF23E78" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">US Treasury and Government [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_8A3CB13B4CF5F81BE1C2C5651FF23E78" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USTreasuryAndGovernmentMember_8A3CB13B4CF5F81BE1C2C5651FF23E78" xlink:to="lab_us-gaap_USTreasuryAndGovernmentMember_8A3CB13B4CF5F81BE1C2C5651FF23E78" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_0124B9770B326C7C28EAC5651FF35DD8_terseLabel_en-US" xlink:label="lab_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_0124B9770B326C7C28EAC5651FF35DD8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Asset-backed securities [Member]</link:label>
    <link:label id="lab_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_0124B9770B326C7C28EAC5651FF35DD8_label_en-US" xlink:label="lab_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_0124B9770B326C7C28EAC5651FF35DD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset-backed Securities, Securitized Loans and Receivables [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_0124B9770B326C7C28EAC5651FF35DD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_0124B9770B326C7C28EAC5651FF35DD8" xlink:to="lab_us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember_0124B9770B326C7C28EAC5651FF35DD8" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherDebtSecuritiesMember_7F86C44FABB3125D4BA2C5651FF30089_terseLabel_en-US" xlink:label="lab_us-gaap_OtherDebtSecuritiesMember_7F86C44FABB3125D4BA2C5651FF30089" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other debt securities [Member]</link:label>
    <link:label id="lab_us-gaap_OtherDebtSecuritiesMember_7F86C44FABB3125D4BA2C5651FF30089_label_en-US" xlink:label="lab_us-gaap_OtherDebtSecuritiesMember_7F86C44FABB3125D4BA2C5651FF30089" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Debt Obligations [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherDebtSecuritiesMember" xlink:label="loc_us-gaap_OtherDebtSecuritiesMember_7F86C44FABB3125D4BA2C5651FF30089" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherDebtSecuritiesMember_7F86C44FABB3125D4BA2C5651FF30089" xlink:to="lab_us-gaap_OtherDebtSecuritiesMember_7F86C44FABB3125D4BA2C5651FF30089" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_6F2A7069505D5D9FCAEDC5651FF3CA64_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_6F2A7069505D5D9FCAEDC5651FF3CA64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Trading Securities [Line Items]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_6F2A7069505D5D9FCAEDC5651FF3CA64_label_en-US" xlink:label="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_6F2A7069505D5D9FCAEDC5651FF3CA64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt and Equity Securities, FV-NI [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_6F2A7069505D5D9FCAEDC5651FF3CA64" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_6F2A7069505D5D9FCAEDC5651FF3CA64" xlink:to="lab_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_6F2A7069505D5D9FCAEDC5651FF3CA64" xlink:type="arc" />
    <link:label id="lab_us-gaap_TradingSecuritiesDebt_2F03523DBD6FD9DCA2C9C5651FF3D5F0_terseLabel_en-US" xlink:label="lab_us-gaap_TradingSecuritiesDebt_2F03523DBD6FD9DCA2C9C5651FF3D5F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading securities</link:label>
    <link:label id="lab_us-gaap_TradingSecuritiesDebt_2F03523DBD6FD9DCA2C9C5651FF3D5F0_label_en-US" xlink:label="lab_us-gaap_TradingSecuritiesDebt_2F03523DBD6FD9DCA2C9C5651FF3D5F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Trading</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TradingSecuritiesDebt" xlink:label="loc_us-gaap_TradingSecuritiesDebt_2F03523DBD6FD9DCA2C9C5651FF3D5F0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TradingSecuritiesDebt_2F03523DBD6FD9DCA2C9C5651FF3D5F0" xlink:to="lab_us-gaap_TradingSecuritiesDebt_2F03523DBD6FD9DCA2C9C5651FF3D5F0" xlink:type="arc" />
    <link:label id="lab_bokf_TradingSecuritiesNetUnrealizedGainsLosses_9D2E70312F6D5F27DB43C5651FF43A7F_terseLabel_en-US" xlink:label="lab_bokf_TradingSecuritiesNetUnrealizedGainsLosses_9D2E70312F6D5F27DB43C5651FF43A7F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Securities, Net Unrealized Gain (Loss)</link:label>
    <link:label id="lab_bokf_TradingSecuritiesNetUnrealizedGainsLosses_9D2E70312F6D5F27DB43C5651FF43A7F_label_en-US" xlink:label="lab_bokf_TradingSecuritiesNetUnrealizedGainsLosses_9D2E70312F6D5F27DB43C5651FF43A7F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Securities, Net Unrealized Gains (Losses)</link:label>
    <link:label id="lab_bokf_TradingSecuritiesNetUnrealizedGainsLosses_9D2E70312F6D5F27DB43C5651FF43A7F_documentation_en-US" xlink:label="lab_bokf_TradingSecuritiesNetUnrealizedGainsLosses_9D2E70312F6D5F27DB43C5651FF43A7F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the unrealized holding gain or loss included in the fair value of trading securities as of the balance sheet date.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_TradingSecuritiesNetUnrealizedGainsLosses" xlink:label="loc_bokf_TradingSecuritiesNetUnrealizedGainsLosses_9D2E70312F6D5F27DB43C5651FF43A7F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_TradingSecuritiesNetUnrealizedGainsLosses_9D2E70312F6D5F27DB43C5651FF43A7F" xlink:to="lab_bokf_TradingSecuritiesNetUnrealizedGainsLosses_9D2E70312F6D5F27DB43C5651FF43A7F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeInstrumentDetailAbstract_39ADC55EB3187CF2B5DCC5654C07C81C_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentDetailAbstract_39ADC55EB3187CF2B5DCC5654C07C81C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instrument Detail [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentDetailAbstract" xlink:label="loc_us-gaap_DerivativeInstrumentDetailAbstract_39ADC55EB3187CF2B5DCC5654C07C81C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentDetailAbstract_39ADC55EB3187CF2B5DCC5654C07C81C" xlink:to="lab_us-gaap_DerivativeInstrumentDetailAbstract_39ADC55EB3187CF2B5DCC5654C07C81C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_C1D49B1A3FD7B933D444C5654C07DE88_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_C1D49B1A3FD7B933D444C5654C07DE88" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_C1D49B1A3FD7B933D444C5654C07DE88_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_C1D49B1A3FD7B933D444C5654C07DE88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_C1D49B1A3FD7B933D444C5654C07DE88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_C1D49B1A3FD7B933D444C5654C07DE88" xlink:to="lab_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_C1D49B1A3FD7B933D444C5654C07DE88" xlink:type="arc" />
    <link:label id="lab_us-gaap_HedgingDesignationAxis_A486A30AF1E87D52F7F3C5654C0766E7_terseLabel_en-US" xlink:label="lab_us-gaap_HedgingDesignationAxis_A486A30AF1E87D52F7F3C5654C0766E7" 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_A486A30AF1E87D52F7F3C5654C0766E7_label_en-US" xlink:label="lab_us-gaap_HedgingDesignationAxis_A486A30AF1E87D52F7F3C5654C0766E7" 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_A486A30AF1E87D52F7F3C5654C0766E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HedgingDesignationAxis_A486A30AF1E87D52F7F3C5654C0766E7" xlink:to="lab_us-gaap_HedgingDesignationAxis_A486A30AF1E87D52F7F3C5654C0766E7" xlink:type="arc" />
    <link:label id="lab_us-gaap_HedgingDesignationDomain_98794518633775667D4CC5654C074BF2_terseLabel_en-US" xlink:label="lab_us-gaap_HedgingDesignationDomain_98794518633775667D4CC5654C074BF2" 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_98794518633775667D4CC5654C074BF2_label_en-US" xlink:label="lab_us-gaap_HedgingDesignationDomain_98794518633775667D4CC5654C074BF2" 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_98794518633775667D4CC5654C074BF2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HedgingDesignationDomain_98794518633775667D4CC5654C074BF2" xlink:to="lab_us-gaap_HedgingDesignationDomain_98794518633775667D4CC5654C074BF2" xlink:type="arc" />
    <link:label id="lab_us-gaap_NondesignatedMember_1F15B3CBC17C28A906E9C5654C082D0A_terseLabel_en-US" xlink:label="lab_us-gaap_NondesignatedMember_1F15B3CBC17C28A906E9C5654C082D0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Not Designated as Hedging Instrument [Member]</link:label>
    <link:label id="lab_us-gaap_NondesignatedMember_1F15B3CBC17C28A906E9C5654C082D0A_label_en-US" xlink:label="lab_us-gaap_NondesignatedMember_1F15B3CBC17C28A906E9C5654C082D0A" 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_1F15B3CBC17C28A906E9C5654C082D0A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NondesignatedMember_1F15B3CBC17C28A906E9C5654C082D0A" xlink:to="lab_us-gaap_NondesignatedMember_1F15B3CBC17C28A906E9C5654C082D0A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_9FAA7085457E4E59E904C5654C085861_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis_9FAA7085457E4E59E904C5654C085861" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_9FAA7085457E4E59E904C5654C085861_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis_9FAA7085457E4E59E904C5654C085861" 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_9FAA7085457E4E59E904C5654C085861" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_9FAA7085457E4E59E904C5654C085861" xlink:to="lab_us-gaap_DerivativeInstrumentRiskAxis_9FAA7085457E4E59E904C5654C085861" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_8BF31835EA3A7909DBE1C5654C088BA1_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain_8BF31835EA3A7909DBE1C5654C088BA1" 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_8BF31835EA3A7909DBE1C5654C088BA1_label_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain_8BF31835EA3A7909DBE1C5654C088BA1" 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_8BF31835EA3A7909DBE1C5654C088BA1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_8BF31835EA3A7909DBE1C5654C088BA1" xlink:to="lab_us-gaap_DerivativeContractTypeDomain_8BF31835EA3A7909DBE1C5654C088BA1" xlink:type="arc" />
    <link:label id="lab_bokf_TbaResidentialMortgageBackedSecuritiesMember_E13252E73F6C75CD21BAC5654C088185_terseLabel_en-US" xlink:label="lab_bokf_TbaResidentialMortgageBackedSecuritiesMember_E13252E73F6C75CD21BAC5654C088185" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">To-be-announced residential mortgage-backed securities [Member]</link:label>
    <link:label id="lab_bokf_TbaResidentialMortgageBackedSecuritiesMember_E13252E73F6C75CD21BAC5654C088185_label_en-US" xlink:label="lab_bokf_TbaResidentialMortgageBackedSecuritiesMember_E13252E73F6C75CD21BAC5654C088185" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TBA Residential Mortgage-Backed Securities [Member]</link:label>
    <link:label id="lab_bokf_TbaResidentialMortgageBackedSecuritiesMember_E13252E73F6C75CD21BAC5654C088185_documentation_en-US" xlink:label="lab_bokf_TbaResidentialMortgageBackedSecuritiesMember_E13252E73F6C75CD21BAC5654C088185" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">To-be-announed residential mortgage-backed securities [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_TbaResidentialMortgageBackedSecuritiesMember" xlink:label="loc_bokf_TbaResidentialMortgageBackedSecuritiesMember_E13252E73F6C75CD21BAC5654C088185" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_TbaResidentialMortgageBackedSecuritiesMember_E13252E73F6C75CD21BAC5654C088185" xlink:to="lab_bokf_TbaResidentialMortgageBackedSecuritiesMember_E13252E73F6C75CD21BAC5654C088185" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestRateSwapMember_A6E48E1108F3D4FBF59CC5654C099A73_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember_A6E48E1108F3D4FBF59CC5654C099A73" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest rate swaps [Member]</link:label>
    <link:label id="lab_us-gaap_InterestRateSwapMember_A6E48E1108F3D4FBF59CC5654C099A73_label_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember_A6E48E1108F3D4FBF59CC5654C099A73" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_A6E48E1108F3D4FBF59CC5654C099A73" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateSwapMember_A6E48E1108F3D4FBF59CC5654C099A73" xlink:to="lab_us-gaap_InterestRateSwapMember_A6E48E1108F3D4FBF59CC5654C099A73" xlink:type="arc" />
    <link:label id="lab_us-gaap_EnergyRelatedDerivativeMember_12CA33CEC3F8AB8BBD78C5654C09E65A_terseLabel_en-US" xlink:label="lab_us-gaap_EnergyRelatedDerivativeMember_12CA33CEC3F8AB8BBD78C5654C09E65A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Energy contracts [Member]</link:label>
    <link:label id="lab_us-gaap_EnergyRelatedDerivativeMember_12CA33CEC3F8AB8BBD78C5654C09E65A_label_en-US" xlink:label="lab_us-gaap_EnergyRelatedDerivativeMember_12CA33CEC3F8AB8BBD78C5654C09E65A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Energy Related Derivative [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EnergyRelatedDerivativeMember" xlink:label="loc_us-gaap_EnergyRelatedDerivativeMember_12CA33CEC3F8AB8BBD78C5654C09E65A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EnergyRelatedDerivativeMember_12CA33CEC3F8AB8BBD78C5654C09E65A" xlink:to="lab_us-gaap_EnergyRelatedDerivativeMember_12CA33CEC3F8AB8BBD78C5654C09E65A" xlink:type="arc" />
    <link:label id="lab_bokf_AgriculturalContractsMember_FBBB7E0DA579FB0337D1C5654C09854A_terseLabel_en-US" xlink:label="lab_bokf_AgriculturalContractsMember_FBBB7E0DA579FB0337D1C5654C09854A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Agricultural contracts [Member]</link:label>
    <link:label id="lab_bokf_AgriculturalContractsMember_FBBB7E0DA579FB0337D1C5654C09854A_label_en-US" xlink:label="lab_bokf_AgriculturalContractsMember_FBBB7E0DA579FB0337D1C5654C09854A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Agricultural Contracts [Member]</link:label>
    <link:label id="lab_bokf_AgriculturalContractsMember_FBBB7E0DA579FB0337D1C5654C09854A_documentation_en-US" xlink:label="lab_bokf_AgriculturalContractsMember_FBBB7E0DA579FB0337D1C5654C09854A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Trading in a derivative instrument whose primary underlying risk is tied to agricultural commodity prices.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_AgriculturalContractsMember" xlink:label="loc_bokf_AgriculturalContractsMember_FBBB7E0DA579FB0337D1C5654C09854A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_AgriculturalContractsMember_FBBB7E0DA579FB0337D1C5654C09854A" xlink:to="lab_bokf_AgriculturalContractsMember_FBBB7E0DA579FB0337D1C5654C09854A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ForeignExchangeContractMember_F9A7EEC9354E5D9D17CDC5654C099774_terseLabel_en-US" xlink:label="lab_us-gaap_ForeignExchangeContractMember_F9A7EEC9354E5D9D17CDC5654C099774" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign exchange contracts [Member]</link:label>
    <link:label id="lab_us-gaap_ForeignExchangeContractMember_F9A7EEC9354E5D9D17CDC5654C099774_label_en-US" xlink:label="lab_us-gaap_ForeignExchangeContractMember_F9A7EEC9354E5D9D17CDC5654C099774" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Exchange Contract [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="loc_us-gaap_ForeignExchangeContractMember_F9A7EEC9354E5D9D17CDC5654C099774" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ForeignExchangeContractMember_F9A7EEC9354E5D9D17CDC5654C099774" xlink:to="lab_us-gaap_ForeignExchangeContractMember_F9A7EEC9354E5D9D17CDC5654C099774" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquitySwapMember_1153CAD199BE97B7187BC5654C096B73_terseLabel_en-US" xlink:label="lab_us-gaap_EquitySwapMember_1153CAD199BE97B7187BC5654C096B73" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity option contracts [Member]</link:label>
    <link:label id="lab_us-gaap_EquitySwapMember_1153CAD199BE97B7187BC5654C096B73_label_en-US" xlink:label="lab_us-gaap_EquitySwapMember_1153CAD199BE97B7187BC5654C096B73" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Swap [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EquitySwapMember" xlink:label="loc_us-gaap_EquitySwapMember_1153CAD199BE97B7187BC5654C096B73" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquitySwapMember_1153CAD199BE97B7187BC5654C096B73" xlink:to="lab_us-gaap_EquitySwapMember_1153CAD199BE97B7187BC5654C096B73" xlink:type="arc" />
    <link:label id="lab_bokf_CustomerRiskManagementProgramsMember_D15F866FAD3C4A88C754C5654C09335E_terseLabel_en-US" xlink:label="lab_bokf_CustomerRiskManagementProgramsMember_D15F866FAD3C4A88C754C5654C09335E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total customer risk management programs</link:label>
    <link:label id="lab_bokf_CustomerRiskManagementProgramsMember_D15F866FAD3C4A88C754C5654C09335E_label_en-US" xlink:label="lab_bokf_CustomerRiskManagementProgramsMember_D15F866FAD3C4A88C754C5654C09335E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer Risk Management Programs [Member]</link:label>
    <link:label id="lab_bokf_CustomerRiskManagementProgramsMember_D15F866FAD3C4A88C754C5654C09335E_documentation_en-US" xlink:label="lab_bokf_CustomerRiskManagementProgramsMember_D15F866FAD3C4A88C754C5654C09335E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents total derivative contracts in customer risk management programs.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CustomerRiskManagementProgramsMember" xlink:label="loc_bokf_CustomerRiskManagementProgramsMember_D15F866FAD3C4A88C754C5654C09335E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CustomerRiskManagementProgramsMember_D15F866FAD3C4A88C754C5654C09335E" xlink:to="lab_bokf_CustomerRiskManagementProgramsMember_D15F866FAD3C4A88C754C5654C09335E" xlink:type="arc" />
    <link:label id="lab_bokf_InternalRiskManagementProgramsMember_1E4F303CC2A31A2767EEC5654C09092C_terseLabel_en-US" xlink:label="lab_bokf_InternalRiskManagementProgramsMember_1E4F303CC2A31A2767EEC5654C09092C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Internal risk management programs [Member]</link:label>
    <link:label id="lab_bokf_InternalRiskManagementProgramsMember_1E4F303CC2A31A2767EEC5654C09092C_label_en-US" xlink:label="lab_bokf_InternalRiskManagementProgramsMember_1E4F303CC2A31A2767EEC5654C09092C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Internal Risk Management Programs [Member]</link:label>
    <link:label id="lab_bokf_InternalRiskManagementProgramsMember_1E4F303CC2A31A2767EEC5654C09092C_documentation_en-US" xlink:label="lab_bokf_InternalRiskManagementProgramsMember_1E4F303CC2A31A2767EEC5654C09092C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents program to manage interest rate sensitivity, as part of its economic hedge of the changes in the fair value of mortgage servicing rights and as an economic hedge of trading securities.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InternalRiskManagementProgramsMember" xlink:label="loc_bokf_InternalRiskManagementProgramsMember_1E4F303CC2A31A2767EEC5654C09092C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InternalRiskManagementProgramsMember_1E4F303CC2A31A2767EEC5654C09092C" xlink:to="lab_bokf_InternalRiskManagementProgramsMember_1E4F303CC2A31A2767EEC5654C09092C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossLineItems_6E1148C1A64697AF6A74C5654C093255_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossLineItems_6E1148C1A64697AF6A74C5654C093255" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) [Line Items]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentsGainLossLineItems_6E1148C1A64697AF6A74C5654C093255_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsGainLossLineItems_6E1148C1A64697AF6A74C5654C093255" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (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_DerivativeInstrumentsGainLossLineItems" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_6E1148C1A64697AF6A74C5654C093255" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_6E1148C1A64697AF6A74C5654C093255" xlink:to="lab_us-gaap_DerivativeInstrumentsGainLossLineItems_6E1148C1A64697AF6A74C5654C093255" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_FB75DCEA19E3D98482BEC5654C0AA5C9_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_FB75DCEA19E3D98482BEC5654C0AA5C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]</link:label>
    <link:label id="lab_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_FB75DCEA19E3D98482BEC5654C0AA5C9_label_en-US" xlink:label="lab_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_FB75DCEA19E3D98482BEC5654C0AA5C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Gain (Loss) on Derivative, Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNetAbstract" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_FB75DCEA19E3D98482BEC5654C0AA5C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_FB75DCEA19E3D98482BEC5654C0AA5C9" xlink:to="lab_us-gaap_DerivativeGainLossOnDerivativeNetAbstract_FB75DCEA19E3D98482BEC5654C0AA5C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_TradingGainsLosses_2D6A7B22B0AAFB6C4715C5654C0AD49F_terseLabel_en-US" xlink:label="lab_us-gaap_TradingGainsLosses_2D6A7B22B0AAFB6C4715C5654C0AD49F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Brokergage and Trading Revenue</link:label>
    <link:label id="lab_us-gaap_TradingGainsLosses_2D6A7B22B0AAFB6C4715C5654C0AD49F_label_en-US" xlink:label="lab_us-gaap_TradingGainsLosses_2D6A7B22B0AAFB6C4715C5654C0AD49F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Trading Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TradingGainsLosses" xlink:label="loc_us-gaap_TradingGainsLosses_2D6A7B22B0AAFB6C4715C5654C0AD49F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TradingGainsLosses_2D6A7B22B0AAFB6C4715C5654C0AD49F" xlink:to="lab_us-gaap_TradingGainsLosses_2D6A7B22B0AAFB6C4715C5654C0AD49F" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeGainLossOnDerivativeNet_C57FF4AA3D64037293DEC5654C0AC88F_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeGainLossOnDerivativeNet_C57FF4AA3D64037293DEC5654C0AC88F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Derivatives, Net</link:label>
    <link:label id="lab_us-gaap_DerivativeGainLossOnDerivativeNet_C57FF4AA3D64037293DEC5654C0AC88F_label_en-US" xlink:label="lab_us-gaap_DerivativeGainLossOnDerivativeNet_C57FF4AA3D64037293DEC5654C0AC88F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Gain (Loss) on Derivative, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_C57FF4AA3D64037293DEC5654C0AC88F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeGainLossOnDerivativeNet_C57FF4AA3D64037293DEC5654C0AC88F" xlink:to="lab_us-gaap_DerivativeGainLossOnDerivativeNet_C57FF4AA3D64037293DEC5654C0AC88F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F41D4E2874C9A743CD6DC5654C129BAC_terseLabel_en-US" xlink:label="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F41D4E2874C9A743CD6DC5654C129BAC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]</link:label>
    <link:label id="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F41D4E2874C9A743CD6DC5654C129BAC_label_en-US" xlink:label="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F41D4E2874C9A743CD6DC5654C129BAC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F41D4E2874C9A743CD6DC5654C129BAC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F41D4E2874C9A743CD6DC5654C129BAC" xlink:to="lab_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_F41D4E2874C9A743CD6DC5654C129BAC" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativesFairValueLineItems_0493C1DDF2EADD8833D0C5654C15666D_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativesFairValueLineItems_0493C1DDF2EADD8833D0C5654C15666D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivatives, Fair Value [Line Items]</link:label>
    <link:label id="lab_us-gaap_DerivativesFairValueLineItems_0493C1DDF2EADD8833D0C5654C15666D_label_en-US" xlink:label="lab_us-gaap_DerivativesFairValueLineItems_0493C1DDF2EADD8833D0C5654C15666D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivatives, Fair Value [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_0493C1DDF2EADD8833D0C5654C15666D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_0493C1DDF2EADD8833D0C5654C15666D" xlink:to="lab_us-gaap_DerivativesFairValueLineItems_0493C1DDF2EADD8833D0C5654C15666D" xlink:type="arc" />
    <link:label id="lab_us-gaap_NotionalAmountOfDerivativesAbstract_28FC1F2B609097B43AB4C5654C154A0D_terseLabel_en-US" xlink:label="lab_us-gaap_NotionalAmountOfDerivativesAbstract_28FC1F2B609097B43AB4C5654C154A0D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Notional Amount of Derivatives [Abstract]</link:label>
    <link:label id="lab_us-gaap_NotionalAmountOfDerivativesAbstract_28FC1F2B609097B43AB4C5654C154A0D_label_en-US" xlink:label="lab_us-gaap_NotionalAmountOfDerivativesAbstract_28FC1F2B609097B43AB4C5654C154A0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Notional Disclosures [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NotionalAmountOfDerivativesAbstract" xlink:label="loc_us-gaap_NotionalAmountOfDerivativesAbstract_28FC1F2B609097B43AB4C5654C154A0D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NotionalAmountOfDerivativesAbstract_28FC1F2B609097B43AB4C5654C154A0D" xlink:to="lab_us-gaap_NotionalAmountOfDerivativesAbstract_28FC1F2B609097B43AB4C5654C154A0D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeAssetNotionalAmount_40D32CC0C093BBA54F6CC5654C15C988_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetNotionalAmount_40D32CC0C093BBA54F6CC5654C15C988" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Assets, Notional</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetNotionalAmount_40D32CC0C093BBA54F6CC5654C15C988_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetNotionalAmount_40D32CC0C093BBA54F6CC5654C15C988" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Notional Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeAssetNotionalAmount" xlink:label="loc_us-gaap_DerivativeAssetNotionalAmount_40D32CC0C093BBA54F6CC5654C15C988" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssetNotionalAmount_40D32CC0C093BBA54F6CC5654C15C988" xlink:to="lab_us-gaap_DerivativeAssetNotionalAmount_40D32CC0C093BBA54F6CC5654C15C988" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeLiabilityNotionalAmount_DF701A91E0CA09D8A5D5C5654C157413_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityNotionalAmount_DF701A91E0CA09D8A5D5C5654C157413" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Liabilities, Notional</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilityNotionalAmount_DF701A91E0CA09D8A5D5C5654C157413_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityNotionalAmount_DF701A91E0CA09D8A5D5C5654C157413" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Notional Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilityNotionalAmount" xlink:label="loc_us-gaap_DerivativeLiabilityNotionalAmount_DF701A91E0CA09D8A5D5C5654C157413" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilityNotionalAmount_DF701A91E0CA09D8A5D5C5654C157413" xlink:to="lab_us-gaap_DerivativeLiabilityNotionalAmount_DF701A91E0CA09D8A5D5C5654C157413" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeAssetFairValueNetAbstract_F76E37F505C13939886AC5654C151464_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetFairValueNetAbstract_F76E37F505C13939886AC5654C151464" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Assets, Fair Value, Net [Abstract]</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetFairValueNetAbstract_F76E37F505C13939886AC5654C151464_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetFairValueNetAbstract_F76E37F505C13939886AC5654C151464" 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 [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeAssetFairValueNetAbstract" xlink:label="loc_us-gaap_DerivativeAssetFairValueNetAbstract_F76E37F505C13939886AC5654C151464" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssetFairValueNetAbstract_F76E37F505C13939886AC5654C151464" xlink:to="lab_us-gaap_DerivativeAssetFairValueNetAbstract_F76E37F505C13939886AC5654C151464" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_6E43F9222DABF82EE6CEC5654C157AC3_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_6E43F9222DABF82EE6CEC5654C157AC3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Assets, Gross Fair Value</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_6E43F9222DABF82EE6CEC5654C157AC3_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_6E43F9222DABF82EE6CEC5654C157AC3" 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_6E43F9222DABF82EE6CEC5654C157AC3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_6E43F9222DABF82EE6CEC5654C157AC3" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeAsset_6E43F9222DABF82EE6CEC5654C157AC3" xlink:type="arc" />
    <link:label id="lab_bokf_DerivativeAssetNettingAdjustments_9FE8F7B885567AAB9186C5654C163179_negatedTerseLabel_en-US" xlink:label="lab_bokf_DerivativeAssetNettingAdjustments_9FE8F7B885567AAB9186C5654C163179" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Derivative Assets, Netting Adjustments</link:label>
    <link:label id="lab_bokf_DerivativeAssetNettingAdjustments_9FE8F7B885567AAB9186C5654C163179_label_en-US" xlink:label="lab_bokf_DerivativeAssetNettingAdjustments_9FE8F7B885567AAB9186C5654C163179" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Netting Adjustments</link:label>
    <link:label id="lab_bokf_DerivativeAssetNettingAdjustments_9FE8F7B885567AAB9186C5654C163179_documentation_en-US" xlink:label="lab_bokf_DerivativeAssetNettingAdjustments_9FE8F7B885567AAB9186C5654C163179" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents amount of gross derivative asset positions offset by gross derivate liability due to enforceable master netting or similar agreements.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DerivativeAssetNettingAdjustments" xlink:label="loc_bokf_DerivativeAssetNettingAdjustments_9FE8F7B885567AAB9186C5654C163179" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DerivativeAssetNettingAdjustments_9FE8F7B885567AAB9186C5654C163179" xlink:to="lab_bokf_DerivativeAssetNettingAdjustments_9FE8F7B885567AAB9186C5654C163179" xlink:type="arc" />
    <link:label id="lab_bokf_DerivativeAssetsNetFairValueBeforeCashCollateral_0A0AF4EB192B915DBFC5C5654C1696C0_totalLabel_en-US" xlink:label="lab_bokf_DerivativeAssetsNetFairValueBeforeCashCollateral_0A0AF4EB192B915DBFC5C5654C1696C0" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Derivative Assets, Net Fair Value Before Cash Collateral</link:label>
    <link:label id="lab_bokf_DerivativeAssetsNetFairValueBeforeCashCollateral_0A0AF4EB192B915DBFC5C5654C1696C0_label_en-US" xlink:label="lab_bokf_DerivativeAssetsNetFairValueBeforeCashCollateral_0A0AF4EB192B915DBFC5C5654C1696C0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Assets, Net Fair Value Before Cash Collateral</link:label>
    <link:label id="lab_bokf_DerivativeAssetsNetFairValueBeforeCashCollateral_0A0AF4EB192B915DBFC5C5654C1696C0_documentation_en-US" xlink:label="lab_bokf_DerivativeAssetsNetFairValueBeforeCashCollateral_0A0AF4EB192B915DBFC5C5654C1696C0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents net derivative assets before offsetting the obligation to return cash collateral under a master netting or similar arrangement.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DerivativeAssetsNetFairValueBeforeCashCollateral" xlink:label="loc_bokf_DerivativeAssetsNetFairValueBeforeCashCollateral_0A0AF4EB192B915DBFC5C5654C1696C0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DerivativeAssetsNetFairValueBeforeCashCollateral_0A0AF4EB192B915DBFC5C5654C1696C0" xlink:to="lab_bokf_DerivativeAssetsNetFairValueBeforeCashCollateral_0A0AF4EB192B915DBFC5C5654C1696C0" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_8AF20FA2AFBF654FBF79C5654C16B53E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_8AF20FA2AFBF654FBF79C5654C16B53E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Derivative Assets, Cash Collateral</link:label>
    <link:label id="lab_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_8AF20FA2AFBF654FBF79C5654C16B53E_label_en-US" xlink:label="lab_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_8AF20FA2AFBF654FBF79C5654C16B53E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Asset, Collateral, Obligation to Return Cash, Offset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset" xlink:label="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_8AF20FA2AFBF654FBF79C5654C16B53E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_8AF20FA2AFBF654FBF79C5654C16B53E" xlink:to="lab_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_8AF20FA2AFBF654FBF79C5654C16B53E" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeAssets_FF3902143B487D687D41C5654C1641F1_totalLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssets_FF3902143B487D687D41C5654C1641F1" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Derviative contracts, net of cash collateral, Assets, Fair value</link:label>
    <link:label id="lab_us-gaap_DerivativeAssets_FF3902143B487D687D41C5654C1641F1_label_en-US" xlink:label="lab_us-gaap_DerivativeAssets_FF3902143B487D687D41C5654C1641F1" 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_FF3902143B487D687D41C5654C1641F1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssets_FF3902143B487D687D41C5654C1641F1" xlink:to="lab_us-gaap_DerivativeAssets_FF3902143B487D687D41C5654C1641F1" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeLiabilityFairValueNetAbstract_1A3692B03BF96569FA42C5654C16D25E_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityFairValueNetAbstract_1A3692B03BF96569FA42C5654C16D25E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Liabilities, Fair Value, Net [Abstract]</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilityFairValueNetAbstract_1A3692B03BF96569FA42C5654C16D25E_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityFairValueNetAbstract_1A3692B03BF96569FA42C5654C16D25E" 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 [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilityFairValueNetAbstract" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueNetAbstract_1A3692B03BF96569FA42C5654C16D25E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilityFairValueNetAbstract_1A3692B03BF96569FA42C5654C16D25E" xlink:to="lab_us-gaap_DerivativeLiabilityFairValueNetAbstract_1A3692B03BF96569FA42C5654C16D25E" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_368BDA2D10C63CB388B2C5654C178127_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_368BDA2D10C63CB388B2C5654C178127" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Liabilities, Gross Fair Value</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_368BDA2D10C63CB388B2C5654C178127_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_368BDA2D10C63CB388B2C5654C178127" 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_368BDA2D10C63CB388B2C5654C178127" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_368BDA2D10C63CB388B2C5654C178127" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeLiability_368BDA2D10C63CB388B2C5654C178127" xlink:type="arc" />
    <link:label id="lab_bokf_DerivativeLiabilityNettingAdjustments_A16562F0736566A159E8C5654C179078_negatedTerseLabel_en-US" xlink:label="lab_bokf_DerivativeLiabilityNettingAdjustments_A16562F0736566A159E8C5654C179078" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Derivative Liabilities, Netting Adjustments</link:label>
    <link:label id="lab_bokf_DerivativeLiabilityNettingAdjustments_A16562F0736566A159E8C5654C179078_label_en-US" xlink:label="lab_bokf_DerivativeLiabilityNettingAdjustments_A16562F0736566A159E8C5654C179078" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Netting Adjustments</link:label>
    <link:label id="lab_bokf_DerivativeLiabilityNettingAdjustments_A16562F0736566A159E8C5654C179078_documentation_en-US" xlink:label="lab_bokf_DerivativeLiabilityNettingAdjustments_A16562F0736566A159E8C5654C179078" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents amount of gross derivative liability positions offset by gross derivative asset positions due to enforceable master netting or similar arrangements.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DerivativeLiabilityNettingAdjustments" xlink:label="loc_bokf_DerivativeLiabilityNettingAdjustments_A16562F0736566A159E8C5654C179078" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DerivativeLiabilityNettingAdjustments_A16562F0736566A159E8C5654C179078" xlink:to="lab_bokf_DerivativeLiabilityNettingAdjustments_A16562F0736566A159E8C5654C179078" xlink:type="arc" />
    <link:label id="lab_bokf_DerivativeLiabilityNetFairValueBeforeCashCollateral_93A1555355ABD5135308C5654C177858_totalLabel_en-US" xlink:label="lab_bokf_DerivativeLiabilityNetFairValueBeforeCashCollateral_93A1555355ABD5135308C5654C177858" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Derivative Liabilities, Net Fair Value Before Cash Collateral</link:label>
    <link:label id="lab_bokf_DerivativeLiabilityNetFairValueBeforeCashCollateral_93A1555355ABD5135308C5654C177858_label_en-US" xlink:label="lab_bokf_DerivativeLiabilityNetFairValueBeforeCashCollateral_93A1555355ABD5135308C5654C177858" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Net Fair Value Before Cash Collateral</link:label>
    <link:label id="lab_bokf_DerivativeLiabilityNetFairValueBeforeCashCollateral_93A1555355ABD5135308C5654C177858_documentation_en-US" xlink:label="lab_bokf_DerivativeLiabilityNetFairValueBeforeCashCollateral_93A1555355ABD5135308C5654C177858" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents net derivative liability before consideration of right to reclasim cash collateral under master netting or similar arrangements.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DerivativeLiabilityNetFairValueBeforeCashCollateral" xlink:label="loc_bokf_DerivativeLiabilityNetFairValueBeforeCashCollateral_93A1555355ABD5135308C5654C177858" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DerivativeLiabilityNetFairValueBeforeCashCollateral_93A1555355ABD5135308C5654C177858" xlink:to="lab_bokf_DerivativeLiabilityNetFairValueBeforeCashCollateral_93A1555355ABD5135308C5654C177858" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_D0C65B4C119E8456A8F0C5654C17F79C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_D0C65B4C119E8456A8F0C5654C17F79C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Derivative Liabilities, Cash Collateral</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_D0C65B4C119E8456A8F0C5654C17F79C_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_D0C65B4C119E8456A8F0C5654C17F79C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Liability, Collateral, Right to Reclaim Cash, Offset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset" xlink:label="loc_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_D0C65B4C119E8456A8F0C5654C17F79C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_D0C65B4C119E8456A8F0C5654C17F79C" xlink:to="lab_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_D0C65B4C119E8456A8F0C5654C17F79C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeLiabilities_EABD03E4560C2DB0DDA0C5654C177EB2_totalLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilities_EABD03E4560C2DB0DDA0C5654C177EB2" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Derivative Liabilities, Fair Value, Net of Cash Collateral</link:label>
    <link:label id="lab_us-gaap_DerivativeLiabilities_EABD03E4560C2DB0DDA0C5654C177EB2_label_en-US" xlink:label="lab_us-gaap_DerivativeLiabilities_EABD03E4560C2DB0DDA0C5654C177EB2" 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_EABD03E4560C2DB0DDA0C5654C177EB2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilities_EABD03E4560C2DB0DDA0C5654C177EB2" xlink:to="lab_us-gaap_DerivativeLiabilities_EABD03E4560C2DB0DDA0C5654C177EB2" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosuresAbstract_8B207A45677F429C33ADC5C6FD3FAB61_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresAbstract_8B207A45677F429C33ADC5C6FD3FAB61" 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_8B207A45677F429C33ADC5C6FD3FAB61" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_8B207A45677F429C33ADC5C6FD3FAB61" xlink:to="lab_us-gaap_FairValueDisclosuresAbstract_8B207A45677F429C33ADC5C6FD3FAB61" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_61675E4CCDB4EAEEB6A3C5C6FD3F9629_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_61675E4CCDB4EAEEB6A3C5C6FD3F9629" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_61675E4CCDB4EAEEB6A3C5C6FD3F9629_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_61675E4CCDB4EAEEB6A3C5C6FD3F9629" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_61675E4CCDB4EAEEB6A3C5C6FD3F9629" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_61675E4CCDB4EAEEB6A3C5C6FD3F9629" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_61675E4CCDB4EAEEB6A3C5C6FD3F9629" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueByAssetSubClassAxis_662CD3DBEE3C4ECFB955C5C6FD3F5C1A_terseLabel_en-US" xlink:label="lab_bokf_FairValueByAssetSubClassAxis_662CD3DBEE3C4ECFB955C5C6FD3F5C1A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value By Asset Sub-Class [Axis]</link:label>
    <link:label id="lab_bokf_FairValueByAssetSubClassAxis_662CD3DBEE3C4ECFB955C5C6FD3F5C1A_label_en-US" xlink:label="lab_bokf_FairValueByAssetSubClassAxis_662CD3DBEE3C4ECFB955C5C6FD3F5C1A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value By Asset Sub-Class [Axis]</link:label>
    <link:label id="lab_bokf_FairValueByAssetSubClassAxis_662CD3DBEE3C4ECFB955C5C6FD3F5C1A_documentation_en-US" xlink:label="lab_bokf_FairValueByAssetSubClassAxis_662CD3DBEE3C4ECFB955C5C6FD3F5C1A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair value information by sub-class of asset.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueByAssetSubClassAxis" xlink:label="loc_bokf_FairValueByAssetSubClassAxis_662CD3DBEE3C4ECFB955C5C6FD3F5C1A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueByAssetSubClassAxis_662CD3DBEE3C4ECFB955C5C6FD3F5C1A" xlink:to="lab_bokf_FairValueByAssetSubClassAxis_662CD3DBEE3C4ECFB955C5C6FD3F5C1A" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueByAssetSubClassDomain_767EAFBD869F9333D272C5C6FD3FADFA_terseLabel_en-US" xlink:label="lab_bokf_FairValueByAssetSubClassDomain_767EAFBD869F9333D272C5C6FD3FADFA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value By Asset Sub-Class [Domain]</link:label>
    <link:label id="lab_bokf_FairValueByAssetSubClassDomain_767EAFBD869F9333D272C5C6FD3FADFA_label_en-US" xlink:label="lab_bokf_FairValueByAssetSubClassDomain_767EAFBD869F9333D272C5C6FD3FADFA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value By Asset Sub-Class [Domain]</link:label>
    <link:label id="lab_bokf_FairValueByAssetSubClassDomain_767EAFBD869F9333D272C5C6FD3FADFA_documentation_en-US" xlink:label="lab_bokf_FairValueByAssetSubClassDomain_767EAFBD869F9333D272C5C6FD3FADFA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents sub-classes of assets measured and disclosed at fair value.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueByAssetSubClassDomain" xlink:label="loc_bokf_FairValueByAssetSubClassDomain_767EAFBD869F9333D272C5C6FD3FADFA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueByAssetSubClassDomain_767EAFBD869F9333D272C5C6FD3FADFA" xlink:to="lab_bokf_FairValueByAssetSubClassDomain_767EAFBD869F9333D272C5C6FD3FADFA" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByMeasurementFrequencyAxis_26DC0EF3D81104D4640AC5C6FD40DC84_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementFrequencyAxis_26DC0EF3D81104D4640AC5C6FD40DC84" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Measurement Frequency [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByMeasurementFrequencyAxis_26DC0EF3D81104D4640AC5C6FD40DC84_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementFrequencyAxis_26DC0EF3D81104D4640AC5C6FD40DC84" 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_26DC0EF3D81104D4640AC5C6FD40DC84" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_26DC0EF3D81104D4640AC5C6FD40DC84" xlink:to="lab_us-gaap_FairValueByMeasurementFrequencyAxis_26DC0EF3D81104D4640AC5C6FD40DC84" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementFrequencyDomain_7BD1F0A7B4187292FB48C5C6FD40CE8A_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain_7BD1F0A7B4187292FB48C5C6FD40CE8A" 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_7BD1F0A7B4187292FB48C5C6FD40CE8A_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementFrequencyDomain_7BD1F0A7B4187292FB48C5C6FD40CE8A" 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_7BD1F0A7B4187292FB48C5C6FD40CE8A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_7BD1F0A7B4187292FB48C5C6FD40CE8A" xlink:to="lab_us-gaap_FairValueMeasurementFrequencyDomain_7BD1F0A7B4187292FB48C5C6FD40CE8A" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementsRecurringMember_A4E48707C86AD9FDEBB9C5C6FD40E712_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsRecurringMember_A4E48707C86AD9FDEBB9C5C6FD40E712" 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_A4E48707C86AD9FDEBB9C5C6FD40E712_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsRecurringMember_A4E48707C86AD9FDEBB9C5C6FD40E712" 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_A4E48707C86AD9FDEBB9C5C6FD40E712" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsRecurringMember_A4E48707C86AD9FDEBB9C5C6FD40E712" xlink:to="lab_us-gaap_FairValueMeasurementsRecurringMember_A4E48707C86AD9FDEBB9C5C6FD40E712" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_87997FC804ECA403B547C5C6FD411E97_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_87997FC804ECA403B547C5C6FD411E97" 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_87997FC804ECA403B547C5C6FD411E97_label_en-US" xlink:label="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_87997FC804ECA403B547C5C6FD411E97" 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_87997FC804ECA403B547C5C6FD411E97" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_87997FC804ECA403B547C5C6FD411E97" xlink:to="lab_us-gaap_FairValueByFairValueHierarchyLevelAxis_87997FC804ECA403B547C5C6FD411E97" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5A5B2B8DA6C97842319BC5C6FD41C893_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5A5B2B8DA6C97842319BC5C6FD41C893" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Hierarchy and NAV [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5A5B2B8DA6C97842319BC5C6FD41C893_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5A5B2B8DA6C97842319BC5C6FD41C893" 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_5A5B2B8DA6C97842319BC5C6FD41C893" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5A5B2B8DA6C97842319BC5C6FD41C893" xlink:to="lab_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5A5B2B8DA6C97842319BC5C6FD41C893" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel3Member_BBB4860463E2A45F50EAC5C6FD410439_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_BBB4860463E2A45F50EAC5C6FD410439" 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_BBB4860463E2A45F50EAC5C6FD410439_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel3Member_BBB4860463E2A45F50EAC5C6FD410439" 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_BBB4860463E2A45F50EAC5C6FD410439" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel3Member_BBB4860463E2A45F50EAC5C6FD410439" xlink:to="lab_us-gaap_FairValueInputsLevel3Member_BBB4860463E2A45F50EAC5C6FD410439" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByAssetClassAxis_36455C73505CB694F57DC5C6FD41CC9C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByAssetClassAxis_36455C73505CB694F57DC5C6FD41CC9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Asset Class [Axis]</link:label>
    <link:label id="lab_us-gaap_FairValueByAssetClassAxis_36455C73505CB694F57DC5C6FD41CC9C_label_en-US" xlink:label="lab_us-gaap_FairValueByAssetClassAxis_36455C73505CB694F57DC5C6FD41CC9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset Class [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_36455C73505CB694F57DC5C6FD41CC9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_36455C73505CB694F57DC5C6FD41CC9C" xlink:to="lab_us-gaap_FairValueByAssetClassAxis_36455C73505CB694F57DC5C6FD41CC9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_504AFCCC5BDBC9A94036C5C6FD425C7B_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_504AFCCC5BDBC9A94036C5C6FD425C7B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value by Asset Class [Domain]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_504AFCCC5BDBC9A94036C5C6FD425C7B_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_504AFCCC5BDBC9A94036C5C6FD425C7B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset Class [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_504AFCCC5BDBC9A94036C5C6FD425C7B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_504AFCCC5BDBC9A94036C5C6FD425C7B" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_504AFCCC5BDBC9A94036C5C6FD425C7B" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableforsaleSecuritiesMember_3DDA9ED68CBC0A9B3487C5C6FD42CB5D_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableforsaleSecuritiesMember_3DDA9ED68CBC0A9B3487C5C6FD42CB5D" 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_3DDA9ED68CBC0A9B3487C5C6FD42CB5D_label_en-US" xlink:label="lab_us-gaap_AvailableforsaleSecuritiesMember_3DDA9ED68CBC0A9B3487C5C6FD42CB5D" 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_3DDA9ED68CBC0A9B3487C5C6FD42CB5D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableforsaleSecuritiesMember_3DDA9ED68CBC0A9B3487C5C6FD42CB5D" xlink:to="lab_us-gaap_AvailableforsaleSecuritiesMember_3DDA9ED68CBC0A9B3487C5C6FD42CB5D" xlink:type="arc" />
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldforSaleMember_A6883C3B03685CEF9AC7C5C6FD422A6B_terseLabel_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldforSaleMember_A6883C3B03685CEF9AC7C5C6FD422A6B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential mortgage loans held for sale [Member]</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldforSaleMember_A6883C3B03685CEF9AC7C5C6FD422A6B_label_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldforSaleMember_A6883C3B03685CEF9AC7C5C6FD422A6B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Mortgage Loans Held for Sale [Member]</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldforSaleMember_A6883C3B03685CEF9AC7C5C6FD422A6B_documentation_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldforSaleMember_A6883C3B03685CEF9AC7C5C6FD422A6B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents financial statement line item Residential Mortgage Loans Held for Sale</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ResidentialMortgageLoansHeldforSaleMember" xlink:label="loc_bokf_ResidentialMortgageLoansHeldforSaleMember_A6883C3B03685CEF9AC7C5C6FD422A6B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ResidentialMortgageLoansHeldforSaleMember_A6883C3B03685CEF9AC7C5C6FD422A6B" xlink:to="lab_bokf_ResidentialMortgageLoansHeldforSaleMember_A6883C3B03685CEF9AC7C5C6FD422A6B" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_898F0D2184E5CEFB3FBAC5C6FD43B291_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_898F0D2184E5CEFB3FBAC5C6FD43B291" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Statement Location [Axis]</link:label>
    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_898F0D2184E5CEFB3FBAC5C6FD43B291_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_898F0D2184E5CEFB3FBAC5C6FD43B291" 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_898F0D2184E5CEFB3FBAC5C6FD43B291" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_898F0D2184E5CEFB3FBAC5C6FD43B291" xlink:to="lab_us-gaap_IncomeStatementLocationAxis_898F0D2184E5CEFB3FBAC5C6FD43B291" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementLocationDomain_E2631332765FAC57AABFC5C6FD43A57C_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_E2631332765FAC57AABFC5C6FD43A57C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Statement Location [Domain]</link:label>
    <link:label id="lab_us-gaap_IncomeStatementLocationDomain_E2631332765FAC57AABFC5C6FD43A57C_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_E2631332765FAC57AABFC5C6FD43A57C" 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_E2631332765FAC57AABFC5C6FD43A57C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_E2631332765FAC57AABFC5C6FD43A57C" xlink:to="lab_us-gaap_IncomeStatementLocationDomain_E2631332765FAC57AABFC5C6FD43A57C" xlink:type="arc" />
    <link:label id="lab_bokf_MortgagebankingrevenueMember_6978F581C0A145BCDA33C5C6FD44B02D_terseLabel_en-US" xlink:label="lab_bokf_MortgagebankingrevenueMember_6978F581C0A145BCDA33C5C6FD44B02D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage banking revenue [Member]</link:label>
    <link:label id="lab_bokf_MortgagebankingrevenueMember_6978F581C0A145BCDA33C5C6FD44B02D_label_en-US" xlink:label="lab_bokf_MortgagebankingrevenueMember_6978F581C0A145BCDA33C5C6FD44B02D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage banking revenue [Member]</link:label>
    <link:label id="lab_bokf_MortgagebankingrevenueMember_6978F581C0A145BCDA33C5C6FD44B02D_documentation_en-US" xlink:label="lab_bokf_MortgagebankingrevenueMember_6978F581C0A145BCDA33C5C6FD44B02D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents Mortgage banking revenue income statement line item.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MortgagebankingrevenueMember" xlink:label="loc_bokf_MortgagebankingrevenueMember_6978F581C0A145BCDA33C5C6FD44B02D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MortgagebankingrevenueMember_6978F581C0A145BCDA33C5C6FD44B02D" xlink:to="lab_bokf_MortgagebankingrevenueMember_6978F581C0A145BCDA33C5C6FD44B02D" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_6894AF90CDF4AFE7A5B4C5C6FD4451F7_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_6894AF90CDF4AFE7A5B4C5C6FD4451F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_6894AF90CDF4AFE7A5B4C5C6FD4451F7_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_6894AF90CDF4AFE7A5B4C5C6FD4451F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_6894AF90CDF4AFE7A5B4C5C6FD4451F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_6894AF90CDF4AFE7A5B4C5C6FD4451F7" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_6894AF90CDF4AFE7A5B4C5C6FD4451F7" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_EFBDD0F80631CF5F890DC5C6FD45198C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_EFBDD0F80631CF5F890DC5C6FD45198C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_EFBDD0F80631CF5F890DC5C6FD45198C_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_EFBDD0F80631CF5F890DC5C6FD45198C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_EFBDD0F80631CF5F890DC5C6FD45198C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_EFBDD0F80631CF5F890DC5C6FD45198C" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_EFBDD0F80631CF5F890DC5C6FD45198C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_53A67849AC2434136A73C5C6FD456DBF_periodStartLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_53A67849AC2434136A73C5C6FD456DBF" 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_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_53A67849AC2434136A73C5C6FD456DBF_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_53A67849AC2434136A73C5C6FD456DBF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_53A67849AC2434136A73C5C6FD456DBF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_53A67849AC2434136A73C5C6FD456DBF" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_53A67849AC2434136A73C5C6FD456DBF" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_4E41972726303EDD66F8C5C6FD455624_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_4E41972726303EDD66F8C5C6FD455624" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transfer to Level 3 from Level 2</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_4E41972726303EDD66F8C5C6FD455624_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_4E41972726303EDD66F8C5C6FD455624" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_4E41972726303EDD66F8C5C6FD455624" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_4E41972726303EDD66F8C5C6FD455624" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_4E41972726303EDD66F8C5C6FD455624" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_DCD8CF74485B8BBE7A83C5C6FD454700_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_DCD8CF74485B8BBE7A83C5C6FD454700" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchases</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_DCD8CF74485B8BBE7A83C5C6FD454700_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_DCD8CF74485B8BBE7A83C5C6FD454700" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_DCD8CF74485B8BBE7A83C5C6FD454700" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_DCD8CF74485B8BBE7A83C5C6FD454700" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_DCD8CF74485B8BBE7A83C5C6FD454700" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_30950E83B245831BDD33C5C6FD45E518_negatedLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_30950E83B245831BDD33C5C6FD45E518" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sales</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_30950E83B245831BDD33C5C6FD45E518_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_30950E83B245831BDD33C5C6FD45E518" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_30950E83B245831BDD33C5C6FD45E518" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_30950E83B245831BDD33C5C6FD45E518" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_30950E83B245831BDD33C5C6FD45E518" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_D7D684213F584FF2C5E6C5C6FD45AD6F_negatedLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_D7D684213F584FF2C5E6C5C6FD45AD6F" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Redemptions and distributions</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_D7D684213F584FF2C5E6C5C6FD45AD6F_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_D7D684213F584FF2C5E6C5C6FD45AD6F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_D7D684213F584FF2C5E6C5C6FD45AD6F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_D7D684213F584FF2C5E6C5C6FD45AD6F" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_D7D684213F584FF2C5E6C5C6FD45AD6F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_C9341F37CF6380439698C5C6FD46EEC9_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_C9341F37CF6380439698C5C6FD46EEC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (loss) recognized in earnings</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_C9341F37CF6380439698C5C6FD46EEC9_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_C9341F37CF6380439698C5C6FD46EEC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_C9341F37CF6380439698C5C6FD46EEC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_C9341F37CF6380439698C5C6FD46EEC9" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_C9341F37CF6380439698C5C6FD46EEC9" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_CB5667EFBB8E53FA6B07C5C6FD4607F4_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_CB5667EFBB8E53FA6B07C5C6FD4607F4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss)</link:label>
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_CB5667EFBB8E53FA6B07C5C6FD4607F4_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_CB5667EFBB8E53FA6B07C5C6FD4607F4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in 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_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_CB5667EFBB8E53FA6B07C5C6FD4607F4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_CB5667EFBB8E53FA6B07C5C6FD4607F4" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_CB5667EFBB8E53FA6B07C5C6FD4607F4" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_3FEDFEC860C81403D0ACC5C6FD46922D_periodEndLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_3FEDFEC860C81403D0ACC5C6FD46922D" 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_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_3FEDFEC860C81403D0ACC5C6FD46922D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_3FEDFEC860C81403D0ACC5C6FD46922D" xlink:to="lab_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_3FEDFEC860C81403D0ACC5C6FD46922D" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_DB4B1DABFD0B2D78FB3FC5C6FD23CB81_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_DB4B1DABFD0B2D78FB3FC5C6FD23CB81" 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_DB4B1DABFD0B2D78FB3FC5C6FD23CB81_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_DB4B1DABFD0B2D78FB3FC5C6FD23CB81" 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_DB4B1DABFD0B2D78FB3FC5C6FD23CB81" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_DB4B1DABFD0B2D78FB3FC5C6FD23CB81" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_DB4B1DABFD0B2D78FB3FC5C6FD23CB81" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationTechniqueAxis_4E4F07650C4FF8D4C626C5C6FD2369EE_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationTechniqueAxis_4E4F07650C4FF8D4C626C5C6FD2369EE" 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_4E4F07650C4FF8D4C626C5C6FD2369EE_label_en-US" xlink:label="lab_us-gaap_ValuationTechniqueAxis_4E4F07650C4FF8D4C626C5C6FD2369EE" 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_4E4F07650C4FF8D4C626C5C6FD2369EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationTechniqueAxis_4E4F07650C4FF8D4C626C5C6FD2369EE" xlink:to="lab_us-gaap_ValuationTechniqueAxis_4E4F07650C4FF8D4C626C5C6FD2369EE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationTechniqueDomain_6921C7C8BAF6454DB80BC5C6FD247A33_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationTechniqueDomain_6921C7C8BAF6454DB80BC5C6FD247A33" 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_6921C7C8BAF6454DB80BC5C6FD247A33_label_en-US" xlink:label="lab_us-gaap_ValuationTechniqueDomain_6921C7C8BAF6454DB80BC5C6FD247A33" 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_6921C7C8BAF6454DB80BC5C6FD247A33" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationTechniqueDomain_6921C7C8BAF6454DB80BC5C6FD247A33" xlink:to="lab_us-gaap_ValuationTechniqueDomain_6921C7C8BAF6454DB80BC5C6FD247A33" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationTechniqueDiscountedCashFlowMember_4B9A79D0103D7AC59653C65415C831A4_terseLabel_en-US" xlink:label="lab_us-gaap_ValuationTechniqueDiscountedCashFlowMember_4B9A79D0103D7AC59653C65415C831A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Discounted Cash Flow [Member]</link:label>
    <link:label id="lab_us-gaap_ValuationTechniqueDiscountedCashFlowMember_4B9A79D0103D7AC59653C65415C831A4_label_en-US" xlink:label="lab_us-gaap_ValuationTechniqueDiscountedCashFlowMember_4B9A79D0103D7AC59653C65415C831A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Valuation Technique, Discounted Cash Flow [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_4B9A79D0103D7AC59653C65415C831A4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_4B9A79D0103D7AC59653C65415C831A4" xlink:to="lab_us-gaap_ValuationTechniqueDiscountedCashFlowMember_4B9A79D0103D7AC59653C65415C831A4" xlink:type="arc" />
    <link:label id="lab_us-gaap_MeasurementInputTypeAxis_AC2E4EEF63D902488260C5C6FD2460B2_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeAxis_AC2E4EEF63D902488260C5C6FD2460B2" 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_AC2E4EEF63D902488260C5C6FD2460B2_label_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeAxis_AC2E4EEF63D902488260C5C6FD2460B2" 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_AC2E4EEF63D902488260C5C6FD2460B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_AC2E4EEF63D902488260C5C6FD2460B2" xlink:to="lab_us-gaap_MeasurementInputTypeAxis_AC2E4EEF63D902488260C5C6FD2460B2" xlink:type="arc" />
    <link:label id="lab_us-gaap_MeasurementInputTypeDomain_8B99E8D4F71558938D79C5C6FD245F90_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeDomain_8B99E8D4F71558938D79C5C6FD245F90" 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_8B99E8D4F71558938D79C5C6FD245F90_label_en-US" xlink:label="lab_us-gaap_MeasurementInputTypeDomain_8B99E8D4F71558938D79C5C6FD245F90" 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_8B99E8D4F71558938D79C5C6FD245F90" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_8B99E8D4F71558938D79C5C6FD245F90" xlink:to="lab_us-gaap_MeasurementInputTypeDomain_8B99E8D4F71558938D79C5C6FD245F90" xlink:type="arc" />
    <link:label id="lab_bokf_ManagementknowledgeofIndustryMember_7FF822DAF9E07E6D9DE2C5C6FD2441FE_terseLabel_en-US" xlink:label="lab_bokf_ManagementknowledgeofIndustryMember_7FF822DAF9E07E6D9DE2C5C6FD2441FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Management knowledge of Industry [Member]</link:label>
    <link:label id="lab_bokf_ManagementknowledgeofIndustryMember_7FF822DAF9E07E6D9DE2C5C6FD2441FE_label_en-US" xlink:label="lab_bokf_ManagementknowledgeofIndustryMember_7FF822DAF9E07E6D9DE2C5C6FD2441FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Management knowledge of Industry [Member]</link:label>
    <link:label id="lab_bokf_ManagementknowledgeofIndustryMember_7FF822DAF9E07E6D9DE2C5C6FD2441FE_documentation_en-US" xlink:label="lab_bokf_ManagementknowledgeofIndustryMember_7FF822DAF9E07E6D9DE2C5C6FD2441FE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Management knowledge of industry and non-real estate collateral including but not limited to recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ManagementknowledgeofIndustryMember" xlink:label="loc_bokf_ManagementknowledgeofIndustryMember_7FF822DAF9E07E6D9DE2C5C6FD2441FE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ManagementknowledgeofIndustryMember_7FF822DAF9E07E6D9DE2C5C6FD2441FE" xlink:to="lab_bokf_ManagementknowledgeofIndustryMember_7FF822DAF9E07E6D9DE2C5C6FD2441FE" xlink:type="arc" />
    <link:label id="lab_bokf_RecoverableoilandgasreservesforwardlookingcommoditypricesandestimatedoperatingcostsMember_CDE3C0FE2E9957E54E1CC5C6FD25180A_terseLabel_en-US" xlink:label="lab_bokf_RecoverableoilandgasreservesforwardlookingcommoditypricesandestimatedoperatingcostsMember_CDE3C0FE2E9957E54E1CC5C6FD25180A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recoverable oil and gas reserves, forward-looking commodity prices, and estimated operating costs [Member]</link:label>
    <link:label id="lab_bokf_RecoverableoilandgasreservesforwardlookingcommoditypricesandestimatedoperatingcostsMember_CDE3C0FE2E9957E54E1CC5C6FD25180A_label_en-US" xlink:label="lab_bokf_RecoverableoilandgasreservesforwardlookingcommoditypricesandestimatedoperatingcostsMember_CDE3C0FE2E9957E54E1CC5C6FD25180A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recoverable oil and gas reserves, forward-looking commodity prices, and estimated operating costs [Member]</link:label>
    <link:label id="lab_bokf_RecoverableoilandgasreservesforwardlookingcommoditypricesandestimatedoperatingcostsMember_CDE3C0FE2E9957E54E1CC5C6FD25180A_documentation_en-US" xlink:label="lab_bokf_RecoverableoilandgasreservesforwardlookingcommoditypricesandestimatedoperatingcostsMember_CDE3C0FE2E9957E54E1CC5C6FD25180A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Recoverable oil and gas reserves, forward-looking commodity prices, and estimated operating costs [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_RecoverableoilandgasreservesforwardlookingcommoditypricesandestimatedoperatingcostsMember" xlink:label="loc_bokf_RecoverableoilandgasreservesforwardlookingcommoditypricesandestimatedoperatingcostsMember_CDE3C0FE2E9957E54E1CC5C6FD25180A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_RecoverableoilandgasreservesforwardlookingcommoditypricesandestimatedoperatingcostsMember_CDE3C0FE2E9957E54E1CC5C6FD25180A" xlink:to="lab_bokf_RecoverableoilandgasreservesforwardlookingcommoditypricesandestimatedoperatingcostsMember_CDE3C0FE2E9957E54E1CC5C6FD25180A" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueMeasurementsNonrecurringMember_879B8A988E668D63DBAFC5C6FD25524B_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsNonrecurringMember_879B8A988E668D63DBAFC5C6FD25524B" 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_879B8A988E668D63DBAFC5C6FD25524B_label_en-US" xlink:label="lab_us-gaap_FairValueMeasurementsNonrecurringMember_879B8A988E668D63DBAFC5C6FD25524B" 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_879B8A988E668D63DBAFC5C6FD25524B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueMeasurementsNonrecurringMember_879B8A988E668D63DBAFC5C6FD25524B" xlink:to="lab_us-gaap_FairValueMeasurementsNonrecurringMember_879B8A988E668D63DBAFC5C6FD25524B" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel1Member_45EF6225000B29D76B47C5C6FD26864C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_45EF6225000B29D76B47C5C6FD26864C" 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_45EF6225000B29D76B47C5C6FD26864C_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel1Member_45EF6225000B29D76B47C5C6FD26864C" 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_45EF6225000B29D76B47C5C6FD26864C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel1Member_45EF6225000B29D76B47C5C6FD26864C" xlink:to="lab_us-gaap_FairValueInputsLevel1Member_45EF6225000B29D76B47C5C6FD26864C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueInputsLevel2Member_3B49C50678B40503A66EC5C6FD26EBB3_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_3B49C50678B40503A66EC5C6FD26EBB3" 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_3B49C50678B40503A66EC5C6FD26EBB3_label_en-US" xlink:label="lab_us-gaap_FairValueInputsLevel2Member_3B49C50678B40503A66EC5C6FD26EBB3" 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_3B49C50678B40503A66EC5C6FD26EBB3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueInputsLevel2Member_3B49C50678B40503A66EC5C6FD26EBB3" xlink:to="lab_us-gaap_FairValueInputsLevel2Member_3B49C50678B40503A66EC5C6FD26EBB3" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueImpairedLoansMember_52E18E92F0F4BD0CC92FC5C6FD271806_terseLabel_en-US" xlink:label="lab_bokf_FairValueImpairedLoansMember_52E18E92F0F4BD0CC92FC5C6FD271806" 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_bokf_FairValueImpairedLoansMember_52E18E92F0F4BD0CC92FC5C6FD271806_label_en-US" xlink:label="lab_bokf_FairValueImpairedLoansMember_52E18E92F0F4BD0CC92FC5C6FD271806" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Impaired Loans [Member]</link:label>
    <link:label id="lab_bokf_FairValueImpairedLoansMember_52E18E92F0F4BD0CC92FC5C6FD271806_documentation_en-US" xlink:label="lab_bokf_FairValueImpairedLoansMember_52E18E92F0F4BD0CC92FC5C6FD271806" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value, Impaired Loans [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueImpairedLoansMember" xlink:label="loc_bokf_FairValueImpairedLoansMember_52E18E92F0F4BD0CC92FC5C6FD271806" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueImpairedLoansMember_52E18E92F0F4BD0CC92FC5C6FD271806" xlink:to="lab_bokf_FairValueImpairedLoansMember_52E18E92F0F4BD0CC92FC5C6FD271806" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueRealEstateAndOtherRepossessedAssetsMember_4B67DD9390BB4B8E8B73C5C6FD273D21_terseLabel_en-US" xlink:label="lab_bokf_FairValueRealEstateAndOtherRepossessedAssetsMember_4B67DD9390BB4B8E8B73C5C6FD273D21" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate and other repossessed assets [Member]</link:label>
    <link:label id="lab_bokf_FairValueRealEstateAndOtherRepossessedAssetsMember_4B67DD9390BB4B8E8B73C5C6FD273D21_label_en-US" xlink:label="lab_bokf_FairValueRealEstateAndOtherRepossessedAssetsMember_4B67DD9390BB4B8E8B73C5C6FD273D21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Real estate and other repossessed assets [Member]</link:label>
    <link:label id="lab_bokf_FairValueRealEstateAndOtherRepossessedAssetsMember_4B67DD9390BB4B8E8B73C5C6FD273D21_documentation_en-US" xlink:label="lab_bokf_FairValueRealEstateAndOtherRepossessedAssetsMember_4B67DD9390BB4B8E8B73C5C6FD273D21" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value, Real estate and other repossessed assets [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueRealEstateAndOtherRepossessedAssetsMember" xlink:label="loc_bokf_FairValueRealEstateAndOtherRepossessedAssetsMember_4B67DD9390BB4B8E8B73C5C6FD273D21" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueRealEstateAndOtherRepossessedAssetsMember_4B67DD9390BB4B8E8B73C5C6FD273D21" xlink:to="lab_bokf_FairValueRealEstateAndOtherRepossessedAssetsMember_4B67DD9390BB4B8E8B73C5C6FD273D21" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_518EEF4AD464EE9DC066C5C6FD27F662_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_518EEF4AD464EE9DC066C5C6FD27F662" 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_518EEF4AD464EE9DC066C5C6FD27F662_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_518EEF4AD464EE9DC066C5C6FD27F662" 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_518EEF4AD464EE9DC066C5C6FD27F662" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_518EEF4AD464EE9DC066C5C6FD27F662" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_518EEF4AD464EE9DC066C5C6FD27F662" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsFairValueDisclosure_FE017A36E8EB2B9BE009C5C6FD275CAD_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosure_FE017A36E8EB2B9BE009C5C6FD275CAD" 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_FE017A36E8EB2B9BE009C5C6FD275CAD_label_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosure_FE017A36E8EB2B9BE009C5C6FD275CAD" 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_FE017A36E8EB2B9BE009C5C6FD275CAD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_FE017A36E8EB2B9BE009C5C6FD275CAD" xlink:to="lab_us-gaap_AssetsFairValueDisclosure_FE017A36E8EB2B9BE009C5C6FD275CAD" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_7EBD7702DB2EC2F623DCC5C6FD2864A0_terseLabel_en-US" xlink:label="lab_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_7EBD7702DB2EC2F623DCC5C6FD2864A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gross charge-offs against allowance for loan losses</link:label>
    <link:label id="lab_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_7EBD7702DB2EC2F623DCC5C6FD2864A0_label_en-US" xlink:label="lab_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_7EBD7702DB2EC2F623DCC5C6FD2864A0" 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_7EBD7702DB2EC2F623DCC5C6FD2864A0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_7EBD7702DB2EC2F623DCC5C6FD2864A0" xlink:to="lab_us-gaap_AllowanceForLoanAndLeaseLossesWriteOffs_7EBD7702DB2EC2F623DCC5C6FD2864A0" xlink:type="arc" />
    <link:label id="lab_bokf_RepossessedAssetsExpenseAndNetLosses_1DFC035926BFE115DFE7C5C6FD28446C_terseLabel_en-US" xlink:label="lab_bokf_RepossessedAssetsExpenseAndNetLosses_1DFC035926BFE115DFE7C5C6FD28446C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net losses and expenses of repossessed assets, net</link:label>
    <link:label id="lab_bokf_RepossessedAssetsExpenseAndNetLosses_1DFC035926BFE115DFE7C5C6FD28446C_label_en-US" xlink:label="lab_bokf_RepossessedAssetsExpenseAndNetLosses_1DFC035926BFE115DFE7C5C6FD28446C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repossessed Assets Expense And Net Losses</link:label>
    <link:label id="lab_bokf_RepossessedAssetsExpenseAndNetLosses_1DFC035926BFE115DFE7C5C6FD28446C_documentation_en-US" xlink:label="lab_bokf_RepossessedAssetsExpenseAndNetLosses_1DFC035926BFE115DFE7C5C6FD28446C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of expense and net losses recognized during the period for repossessed assets.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_RepossessedAssetsExpenseAndNetLosses" xlink:label="loc_bokf_RepossessedAssetsExpenseAndNetLosses_1DFC035926BFE115DFE7C5C6FD28446C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_RepossessedAssetsExpenseAndNetLosses_1DFC035926BFE115DFE7C5C6FD28446C" xlink:to="lab_bokf_RepossessedAssetsExpenseAndNetLosses_1DFC035926BFE115DFE7C5C6FD28446C" xlink:type="arc" />
    <link:label id="lab_us-gaap_MarketableSecuritiesAbstract_77F17E5296364CA54E79D47EA7653139_label_en-US" xlink:label="lab_us-gaap_MarketableSecuritiesAbstract_77F17E5296364CA54E79D47EA7653139" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Marketable Securities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MarketableSecuritiesAbstract" xlink:label="loc_us-gaap_MarketableSecuritiesAbstract_77F17E5296364CA54E79D47EA7653139" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MarketableSecuritiesAbstract_77F17E5296364CA54E79D47EA7653139" xlink:to="lab_us-gaap_MarketableSecuritiesAbstract_77F17E5296364CA54E79D47EA7653139" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_E0F99F3D50B567C353EDD47EA7650DA2_verboseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_E0F99F3D50B567C353EDD47EA7650DA2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Securities [Text Block]</link:label>
    <link:label id="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_E0F99F3D50B567C353EDD47EA7650DA2_label_en-US" xlink:label="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_E0F99F3D50B567C353EDD47EA7650DA2" 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_E0F99F3D50B567C353EDD47EA7650DA2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_E0F99F3D50B567C353EDD47EA7650DA2" xlink:to="lab_us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock_E0F99F3D50B567C353EDD47EA7650DA2" xlink:type="arc" />
    <link:label id="lab_us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock_8405A0C7581556AE1E91C09E3F496E5D_terseLabel_en-US" xlink:label="lab_us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock_8405A0C7581556AE1E91C09E3F496E5D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading Securities, [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock_8405A0C7581556AE1E91C09E3F496E5D_label_en-US" xlink:label="lab_us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock_8405A0C7581556AE1E91C09E3F496E5D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Trading, and Equity Securities, FV-NI [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_TradingSecuritiesAndCertainTradingAssetsTextBlock" xlink:label="loc_us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock_8405A0C7581556AE1E91C09E3F496E5D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock_8405A0C7581556AE1E91C09E3F496E5D" xlink:to="lab_us-gaap_TradingSecuritiesAndCertainTradingAssetsTextBlock_8405A0C7581556AE1E91C09E3F496E5D" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesTextBlock_C5F557BC13AE4955B6A0C09E3F49BBC0_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesTextBlock_C5F557BC13AE4955B6A0C09E3F49BBC0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities (Held-to-Maturity) [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesTextBlock_C5F557BC13AE4955B6A0C09E3F49BBC0_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesTextBlock_C5F557BC13AE4955B6A0C09E3F49BBC0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity [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_HeldToMaturitySecuritiesTextBlock" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesTextBlock_C5F557BC13AE4955B6A0C09E3F49BBC0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesTextBlock_C5F557BC13AE4955B6A0C09E3F49BBC0" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesTextBlock_C5F557BC13AE4955B6A0C09E3F49BBC0" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_3A00884ECC31F46144F3C09E3F495DC7_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_3A00884ECC31F46144F3C09E3F495DC7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available For Sale Securities [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_3A00884ECC31F46144F3C09E3F495DC7_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_3A00884ECC31F46144F3C09E3F495DC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale [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_DebtSecuritiesAvailableForSaleTableTextBlock" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_3A00884ECC31F46144F3C09E3F495DC7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_3A00884ECC31F46144F3C09E3F495DC7" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_3A00884ECC31F46144F3C09E3F495DC7" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_B682F6C2C57C1CC0A9E9C09E3F4988EC_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_B682F6C2C57C1CC0A9E9C09E3F4988EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Unrealized Loss on Investments [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_B682F6C2C57C1CC0A9E9C09E3F4988EC_label_en-US" xlink:label="lab_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_B682F6C2C57C1CC0A9E9C09E3F4988EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Unrealized Loss on Investments [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_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_B682F6C2C57C1CC0A9E9C09E3F4988EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_B682F6C2C57C1CC0A9E9C09E3F4988EC" xlink:to="lab_us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_B682F6C2C57C1CC0A9E9C09E3F4988EC" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueOptionSecuritiesTableTextBlock_655EF90EE1C3FBF5E04BC09E3F4A0724_terseLabel_en-US" xlink:label="lab_bokf_FairValueOptionSecuritiesTableTextBlock_655EF90EE1C3FBF5E04BC09E3F4A0724" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Option Securities [Table Text Block]</link:label>
    <link:label id="lab_bokf_FairValueOptionSecuritiesTableTextBlock_655EF90EE1C3FBF5E04BC09E3F4A0724_label_en-US" xlink:label="lab_bokf_FairValueOptionSecuritiesTableTextBlock_655EF90EE1C3FBF5E04BC09E3F4A0724" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Option Securities [Table Text Block]</link:label>
    <link:label id="lab_bokf_FairValueOptionSecuritiesTableTextBlock_655EF90EE1C3FBF5E04BC09E3F4A0724_documentation_en-US" xlink:label="lab_bokf_FairValueOptionSecuritiesTableTextBlock_655EF90EE1C3FBF5E04BC09E3F4A0724" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value Option Securities [Table Text Block]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueOptionSecuritiesTableTextBlock" xlink:label="loc_bokf_FairValueOptionSecuritiesTableTextBlock_655EF90EE1C3FBF5E04BC09E3F4A0724" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueOptionSecuritiesTableTextBlock_655EF90EE1C3FBF5E04BC09E3F4A0724" xlink:to="lab_bokf_FairValueOptionSecuritiesTableTextBlock_655EF90EE1C3FBF5E04BC09E3F4A0724" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesClassifiedAbstract_E273B177AB2B7A713243C56521635C5A_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesClassifiedAbstract_E273B177AB2B7A713243C56521635C5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesClassifiedAbstract" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesClassifiedAbstract_E273B177AB2B7A713243C56521635C5A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesClassifiedAbstract_E273B177AB2B7A713243C56521635C5A" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesClassifiedAbstract_E273B177AB2B7A713243C56521635C5A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_C94870DAEC421A611E82C56521631F6E_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_C94870DAEC421A611E82C56521631F6E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_C94870DAEC421A611E82C56521631F6E_label_en-US" xlink:label="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_C94870DAEC421A611E82C56521631F6E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesTable" xlink:label="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_C94870DAEC421A611E82C56521631F6E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_C94870DAEC421A611E82C56521631F6E" xlink:to="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_C94870DAEC421A611E82C56521631F6E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FixedIncomeSecuritiesMember_F3BCC3861755D7807F24C56521639AEF_terseLabel_en-US" xlink:label="lab_us-gaap_FixedIncomeSecuritiesMember_F3BCC3861755D7807F24C56521639AEF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fixed Maturity Securities [Member]</link:label>
    <link:label id="lab_us-gaap_FixedIncomeSecuritiesMember_F3BCC3861755D7807F24C56521639AEF_label_en-US" xlink:label="lab_us-gaap_FixedIncomeSecuritiesMember_F3BCC3861755D7807F24C56521639AEF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fixed Income Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FixedIncomeSecuritiesMember" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_F3BCC3861755D7807F24C56521639AEF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FixedIncomeSecuritiesMember_F3BCC3861755D7807F24C56521639AEF" xlink:to="lab_us-gaap_FixedIncomeSecuritiesMember_F3BCC3861755D7807F24C56521639AEF" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_D3EE5F356C776DED650FC5652163BC12_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_D3EE5F356C776DED650FC5652163BC12" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Investment (Held-to-Maturity) Securities [Line Items]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_D3EE5F356C776DED650FC5652163BC12_label_en-US" xlink:label="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_D3EE5F356C776DED650FC5652163BC12" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Held-to-maturity Securities [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems" xlink:label="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_D3EE5F356C776DED650FC5652163BC12" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_D3EE5F356C776DED650FC5652163BC12" xlink:to="lab_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_D3EE5F356C776DED650FC5652163BC12" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecurities_6ABDB0CAC85D532D1382C5652163847D_totalLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecurities_6ABDB0CAC85D532D1382C5652163847D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Investments Securities, Amortized Cost</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecurities_6ABDB0CAC85D532D1382C5652163847D_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecurities_6ABDB0CAC85D532D1382C5652163847D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_6ABDB0CAC85D532D1382C5652163847D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecurities_6ABDB0CAC85D532D1382C5652163847D" xlink:to="lab_us-gaap_HeldToMaturitySecurities_6ABDB0CAC85D532D1382C5652163847D" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesFairValue_4BCBDD19B5510C712D33C5652163BB9E_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesFairValue_4BCBDD19B5510C712D33C5652163BB9E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, fair value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesFairValue_4BCBDD19B5510C712D33C5652163BB9E_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesFairValue_4BCBDD19B5510C712D33C5652163BB9E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_4BCBDD19B5510C712D33C5652163BB9E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesFairValue_4BCBDD19B5510C712D33C5652163BB9E" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesFairValue_4BCBDD19B5510C712D33C5652163BB9E" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_564320EEFBA3D398338BC5652163D515_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_564320EEFBA3D398338BC5652163D515" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Gross Unrealized Gain</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_564320EEFBA3D398338BC5652163D515_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_564320EEFBA3D398338BC5652163D515" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_564320EEFBA3D398338BC5652163D515" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_564320EEFBA3D398338BC5652163D515" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_564320EEFBA3D398338BC5652163D515" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_C8C4EABFE39C1E8D443BC5652163639D_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_C8C4EABFE39C1E8D443BC5652163639D" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Gross Unrealized Loss</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_C8C4EABFE39C1E8D443BC5652163639D_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_C8C4EABFE39C1E8D443BC5652163639D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_C8C4EABFE39C1E8D443BC5652163639D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_C8C4EABFE39C1E8D443BC5652163639D" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_C8C4EABFE39C1E8D443BC5652163639D" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAbstract_CD3C3335B773EAAC0AF1C565216373E5_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAbstract_CD3C3335B773EAAC0AF1C565216373E5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities [Abstract]</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAbstract_CD3C3335B773EAAC0AF1C565216373E5_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAbstract_CD3C3335B773EAAC0AF1C565216373E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAbstract" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAbstract_CD3C3335B773EAAC0AF1C565216373E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAbstract_CD3C3335B773EAAC0AF1C565216373E5" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesAbstract_CD3C3335B773EAAC0AF1C565216373E5" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmountAbstract_168C3A6C51C6A888D3C0C565216376D5_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmountAbstract_168C3A6C51C6A888D3C0C565216376D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Net Carrying Value [Abstract]</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmountAbstract_168C3A6C51C6A888D3C0C565216376D5_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmountAbstract_168C3A6C51C6A888D3C0C565216376D5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Amortized Cost, Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmountAbstract" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmountAbstract_168C3A6C51C6A888D3C0C565216376D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmountAbstract_168C3A6C51C6A888D3C0C565216376D5" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNetCarryingAmountAbstract_168C3A6C51C6A888D3C0C565216376D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost_C9E0CEEED25238809DFFC5652163C3B4_terseLabel_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost_C9E0CEEED25238809DFFC5652163C3B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value</link:label>
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost_C9E0CEEED25238809DFFC5652163C3B4_label_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost_C9E0CEEED25238809DFFC5652163C3B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling 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_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost" xlink:label="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost_C9E0CEEED25238809DFFC5652163C3B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost_C9E0CEEED25238809DFFC5652163C3B4" xlink:to="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost_C9E0CEEED25238809DFFC5652163C3B4" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost_6F7D57D8135102B12A7AC5652163E2F8_terseLabel_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost_6F7D57D8135102B12A7AC5652163E2F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value</link:label>
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost_6F7D57D8135102B12A7AC5652163E2F8_label_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost_6F7D57D8135102B12A7AC5652163E2F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling 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_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost" xlink:label="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost_6F7D57D8135102B12A7AC5652163E2F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost_6F7D57D8135102B12A7AC5652163E2F8" xlink:to="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost_6F7D57D8135102B12A7AC5652163E2F8" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost_059556128513675B0279C56521634770_terseLabel_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost_059556128513675B0279C56521634770" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value</link:label>
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost_059556128513675B0279C56521634770_label_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost_059556128513675B0279C56521634770" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling 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_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost" xlink:label="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost_059556128513675B0279C56521634770" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost_059556128513675B0279C56521634770" xlink:to="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost_059556128513675B0279C56521634770" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost_6131F113697CB1417A75C56521632757_terseLabel_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost_6131F113697CB1417A75C56521632757" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value</link:label>
    <link:label id="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost_6131F113697CB1417A75C56521632757_label_en-US" xlink:label="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost_6131F113697CB1417A75C56521632757" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling 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_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost" xlink:label="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost_6131F113697CB1417A75C56521632757" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost_6131F113697CB1417A75C56521632757" xlink:to="lab_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost_6131F113697CB1417A75C56521632757" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_B2BFB7A79A961C3A17B6C56521639D88_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_B2BFB7A79A961C3A17B6C56521639D88" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Single Maturity Date, Net Carrying Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_B2BFB7A79A961C3A17B6C56521639D88_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_B2BFB7A79A961C3A17B6C56521639D88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_B2BFB7A79A961C3A17B6C56521639D88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_B2BFB7A79A961C3A17B6C56521639D88" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_B2BFB7A79A961C3A17B6C56521639D88" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount_918BD346CE35DB3FAC97C5652163C363_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount_918BD346CE35DB3FAC97C5652163C363" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, without Single Maturity Date, Net Carrying Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount_918BD346CE35DB3FAC97C5652163C363_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount_918BD346CE35DB3FAC97C5652163C363" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, without Single Maturity Date, Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount_918BD346CE35DB3FAC97C5652163C363" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount_918BD346CE35DB3FAC97C5652163C363" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateNetCarryingAmount_918BD346CE35DB3FAC97C5652163C363" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecurities_4923090F7B88215A87A0C56521632A25_verboseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecurities_4923090F7B88215A87A0C56521632A25" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investments Securities, Debt Maturities, Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_4923090F7B88215A87A0C56521632A25" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecurities_4923090F7B88215A87A0C56521632A25" xlink:to="lab_us-gaap_HeldToMaturitySecurities_4923090F7B88215A87A0C56521632A25" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9CBD0FBAA725BE2CD4DC56521634228_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9CBD0FBAA725BE2CD4DC56521634228" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9CBD0FBAA725BE2CD4DC56521634228_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9CBD0FBAA725BE2CD4DC56521634228" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Fair Value, Rolling Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesFairValueRollingMaturityAbstract" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9CBD0FBAA725BE2CD4DC56521634228" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9CBD0FBAA725BE2CD4DC56521634228" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9CBD0FBAA725BE2CD4DC56521634228" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_7E16EE9AB65EB6367D22C565216390EF_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_7E16EE9AB65EB6367D22C565216390EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Less Than One Year, Fair Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_7E16EE9AB65EB6367D22C565216390EF_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_7E16EE9AB65EB6367D22C565216390EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling 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_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_7E16EE9AB65EB6367D22C565216390EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_7E16EE9AB65EB6367D22C565216390EF" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_7E16EE9AB65EB6367D22C565216390EF" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_DC6A6E9D32566F3AB1CAC5652163CAC7_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_DC6A6E9D32566F3AB1CAC5652163CAC7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, One to Five Years, Fair Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_DC6A6E9D32566F3AB1CAC5652163CAC7_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_DC6A6E9D32566F3AB1CAC5652163CAC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling 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_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_DC6A6E9D32566F3AB1CAC5652163CAC7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_DC6A6E9D32566F3AB1CAC5652163CAC7" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_DC6A6E9D32566F3AB1CAC5652163CAC7" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_B0E1A11D82DE1847B078C56521634BA6_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_B0E1A11D82DE1847B078C56521634BA6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Six to Ten Years, Fair Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_B0E1A11D82DE1847B078C56521634BA6_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_B0E1A11D82DE1847B078C56521634BA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling 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_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_B0E1A11D82DE1847B078C56521634BA6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_B0E1A11D82DE1847B078C56521634BA6" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_B0E1A11D82DE1847B078C56521634BA6" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_81760C0582A6E6147CF2C56521635789_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_81760C0582A6E6147CF2C56521635789" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Over Ten Years, Fair Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_81760C0582A6E6147CF2C56521635789_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_81760C0582A6E6147CF2C56521635789" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity Date, Rolling 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_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_81760C0582A6E6147CF2C56521635789" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_81760C0582A6E6147CF2C56521635789" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_81760C0582A6E6147CF2C56521635789" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_DB4A93DC233117A84E51C5652163B4A1_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_DB4A93DC233117A84E51C5652163B4A1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Single Maturity Date, Fair Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_DB4A93DC233117A84E51C5652163B4A1_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_DB4A93DC233117A84E51C5652163B4A1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, Allocated and Single Maturity 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_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_DB4A93DC233117A84E51C5652163B4A1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_DB4A93DC233117A84E51C5652163B4A1" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_DB4A93DC233117A84E51C5652163B4A1" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_4C96ACAAB6B224B3053BC5652163603B_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_4C96ACAAB6B224B3053BC5652163603B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, without Single Maturity Date, Fair Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_4C96ACAAB6B224B3053BC5652163603B_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_4C96ACAAB6B224B3053BC5652163603B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Maturity, without Single Maturity 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_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_4C96ACAAB6B224B3053BC5652163603B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_4C96ACAAB6B224B3053BC5652163603B" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_4C96ACAAB6B224B3053BC5652163603B" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesFairValue_018804D2CC440914B5A9C5652163BC07_verboseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesFairValue_018804D2CC440914B5A9C5652163BC07" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_018804D2CC440914B5A9C5652163BC07" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesFairValue_018804D2CC440914B5A9C5652163BC07" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesFairValue_018804D2CC440914B5A9C5652163BC07" xlink:type="arc" />
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYieldAbstract_FE05CE2F8D7A2C4F6C3AC5652163D841_terseLabel_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYieldAbstract_FE05CE2F8D7A2C4F6C3AC5652163D841" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Nominal Yield [Abstract]</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYieldAbstract_FE05CE2F8D7A2C4F6C3AC5652163D841_label_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYieldAbstract_FE05CE2F8D7A2C4F6C3AC5652163D841" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Nominal Yield [Abstract]</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYieldAbstract_FE05CE2F8D7A2C4F6C3AC5652163D841_documentation_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYieldAbstract_FE05CE2F8D7A2C4F6C3AC5652163D841" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Nominal Yield [Abstract]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYieldAbstract" xlink:label="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYieldAbstract_FE05CE2F8D7A2C4F6C3AC5652163D841" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYieldAbstract_FE05CE2F8D7A2C4F6C3AC5652163D841" xlink:to="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYieldAbstract_FE05CE2F8D7A2C4F6C3AC5652163D841" xlink:type="arc" />
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_5410D341476D0006BC14C56521639B4D_terseLabel_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_5410D341476D0006BC14C56521639B4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Less Than One Year, Nominal Yield</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_5410D341476D0006BC14C56521639B4D_label_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_5410D341476D0006BC14C56521639B4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Next Rolling Twelve Months, Nominal Yield</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_5410D341476D0006BC14C56521639B4D_documentation_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_5410D341476D0006BC14C56521639B4D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Nominal yield on the securities maturing in the next rolling twelve months following the latest balance sheet presented, as calculated from its issuance value or purchase price.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield" xlink:label="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_5410D341476D0006BC14C56521639B4D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_5410D341476D0006BC14C56521639B4D" xlink:to="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_5410D341476D0006BC14C56521639B4D" xlink:type="arc" />
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_E682F1AD58F5AEEFB51AC5652163B67F_terseLabel_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_E682F1AD58F5AEEFB51AC5652163B67F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, One to Five Years, Nominal Yield</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_E682F1AD58F5AEEFB51AC5652163B67F_label_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_E682F1AD58F5AEEFB51AC5652163B67F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Rolling Year Two Through Five, Nominal Yield</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_E682F1AD58F5AEEFB51AC5652163B67F_documentation_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_E682F1AD58F5AEEFB51AC5652163B67F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Nominal yield on the securities maturing in the second rolling twelve months through fifth rolling twelve months following the latest balance sheet presented. as calculated from its issuance value or purchase price.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield" xlink:label="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_E682F1AD58F5AEEFB51AC5652163B67F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_E682F1AD58F5AEEFB51AC5652163B67F" xlink:to="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_E682F1AD58F5AEEFB51AC5652163B67F" xlink:type="arc" />
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_51865790A2F0F88CC5AEC5652163B7AC_terseLabel_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_51865790A2F0F88CC5AEC5652163B7AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Six to Ten Years, Nominal Yield</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_51865790A2F0F88CC5AEC5652163B7AC_label_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_51865790A2F0F88CC5AEC5652163B7AC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Rolling Year Six Through Ten, Nominal Yield</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_51865790A2F0F88CC5AEC5652163B7AC_documentation_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_51865790A2F0F88CC5AEC5652163B7AC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Nominal yield on the securities maturing in sixth through tenth rolling twelve months following the latest balance sheet presented, as calculated from its issuance value or purchase price.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield" xlink:label="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_51865790A2F0F88CC5AEC5652163B7AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_51865790A2F0F88CC5AEC5652163B7AC" xlink:to="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_51865790A2F0F88CC5AEC5652163B7AC" xlink:type="arc" />
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsNominalYield_1C5138FD1A0F08665EA1C5652163BD83_terseLabel_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsNominalYield_1C5138FD1A0F08665EA1C5652163BD83" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Over Ten Years, Nominal Yield</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsNominalYield_1C5138FD1A0F08665EA1C5652163BD83_label_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsNominalYield_1C5138FD1A0F08665EA1C5652163BD83" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Rolling after Ten Years, Nominal Yield</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsNominalYield_1C5138FD1A0F08665EA1C5652163BD83_documentation_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsNominalYield_1C5138FD1A0F08665EA1C5652163BD83" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Nominal yield on the securities maturing after the tenth rolling twelve months following the latest balance sheet presented, as calculated from its issuance value or purchase price.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsNominalYield" xlink:label="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsNominalYield_1C5138FD1A0F08665EA1C5652163BD83" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsNominalYield_1C5138FD1A0F08665EA1C5652163BD83" xlink:to="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsNominalYield_1C5138FD1A0F08665EA1C5652163BD83" xlink:type="arc" />
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYield_C1D8D4095ECB3A39AB39C5652163A22A_terseLabel_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYield_C1D8D4095ECB3A39AB39C5652163A22A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Nominal Yield</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYield_C1D8D4095ECB3A39AB39C5652163A22A_label_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYield_C1D8D4095ECB3A39AB39C5652163A22A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Nominal Yield</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYield_C1D8D4095ECB3A39AB39C5652163A22A_documentation_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYield_C1D8D4095ECB3A39AB39C5652163A22A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total nominal yield for Held-to-maturity Securities over varying maturity dates</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYield" xlink:label="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYield_C1D8D4095ECB3A39AB39C5652163A22A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYield_C1D8D4095ECB3A39AB39C5652163A22A" xlink:to="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesNominalYield_C1D8D4095ECB3A39AB39C5652163A22A" xlink:type="arc" />
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesWeightedAverageMaturity_11072784918D392C41BFC56521631409_terseLabel_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesWeightedAverageMaturity_11072784918D392C41BFC56521631409" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Weighted Average Maturity</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesWeightedAverageMaturity_11072784918D392C41BFC56521631409_label_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesWeightedAverageMaturity_11072784918D392C41BFC56521631409" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Weighted Average Maturity</link:label>
    <link:label id="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesWeightedAverageMaturity_11072784918D392C41BFC56521631409_documentation_en-US" xlink:label="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesWeightedAverageMaturity_11072784918D392C41BFC56521631409" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the weighted average maturity (weighted by amount of the security) of all securities in this investment type.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HeldToMaturitySecuritiesDebtMaturitiesWeightedAverageMaturity" xlink:label="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesWeightedAverageMaturity_11072784918D392C41BFC56521631409" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HeldToMaturitySecuritiesDebtMaturitiesWeightedAverageMaturity_11072784918D392C41BFC56521631409" xlink:to="lab_bokf_HeldToMaturitySecuritiesDebtMaturitiesWeightedAverageMaturity_11072784918D392C41BFC56521631409" xlink:type="arc" />
    <link:label id="lab_bokf_HeldtoMaturitySecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_54E739DB399EF5ADC8ADC565216386E2_terseLabel_en-US" xlink:label="lab_bokf_HeldtoMaturitySecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_54E739DB399EF5ADC8ADC565216386E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities,Debt Maturities, Effective tax rate for nominal yield calculation</link:label>
    <link:label id="lab_bokf_HeldtoMaturitySecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_54E739DB399EF5ADC8ADC565216386E2_label_en-US" xlink:label="lab_bokf_HeldtoMaturitySecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_54E739DB399EF5ADC8ADC565216386E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-Maturity Securities, Debt Maturities, Effective tax rate for nominal yield calculation</link:label>
    <link:label id="lab_bokf_HeldtoMaturitySecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_54E739DB399EF5ADC8ADC565216386E2_documentation_en-US" xlink:label="lab_bokf_HeldtoMaturitySecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_54E739DB399EF5ADC8ADC565216386E2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Effective tax rate for nominal yield calculation for investment (held-to-maturity) securities.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HeldtoMaturitySecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation" xlink:label="loc_bokf_HeldtoMaturitySecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_54E739DB399EF5ADC8ADC565216386E2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HeldtoMaturitySecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_54E739DB399EF5ADC8ADC565216386E2" xlink:to="lab_bokf_HeldtoMaturitySecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_54E739DB399EF5ADC8ADC565216386E2" xlink:type="arc" />
    <link:label id="lab_bokf_HeldtomaturitySecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_82EA6E45C577264BC709C5652163F50D_terseLabel_en-US" xlink:label="lab_bokf_HeldtomaturitySecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_82EA6E45C577264BC709C5652163F50D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities</link:label>
    <link:label id="lab_bokf_HeldtomaturitySecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_82EA6E45C577264BC709C5652163F50D_label_en-US" xlink:label="lab_bokf_HeldtomaturitySecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_82EA6E45C577264BC709C5652163F50D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities</link:label>
    <link:label id="lab_bokf_HeldtomaturitySecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_82EA6E45C577264BC709C5652163F50D_documentation_en-US" xlink:label="lab_bokf_HeldtomaturitySecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_82EA6E45C577264BC709C5652163F50D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The calculated weighted-average expected life of mortgage-backed securities held to maturity based on prepayment assumptions as of the balance sheet date.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HeldtomaturitySecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities" xlink:label="loc_bokf_HeldtomaturitySecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_82EA6E45C577264BC709C5652163F50D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HeldtomaturitySecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_82EA6E45C577264BC709C5652163F50D" xlink:to="lab_bokf_HeldtomaturitySecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_82EA6E45C577264BC709C5652163F50D" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAbstract_63D08E5FB4D8BE01E170C5652163EF02_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAbstract_63D08E5FB4D8BE01E170C5652163EF02" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Continuous Unrealized Loss Position [Abstract]</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAbstract_63D08E5FB4D8BE01E170C5652163EF02_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAbstract_63D08E5FB4D8BE01E170C5652163EF02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAbstract" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAbstract_63D08E5FB4D8BE01E170C5652163EF02" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAbstract_63D08E5FB4D8BE01E170C5652163EF02" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAbstract_63D08E5FB4D8BE01E170C5652163EF02" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_C599B3580A97A11A82CBC5652163F68F_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_C599B3580A97A11A82CBC5652163F68F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_C599B3580A97A11A82CBC5652163F68F_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_C599B3580A97A11A82CBC5652163F68F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_C599B3580A97A11A82CBC5652163F68F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_C599B3580A97A11A82CBC5652163F68F" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_C599B3580A97A11A82CBC5652163F68F" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions_95B112978C1067AD4108C5652163DAC2_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions_95B112978C1067AD4108C5652163DAC2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions_95B112978C1067AD4108C5652163DAC2_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions_95B112978C1067AD4108C5652163DAC2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions_95B112978C1067AD4108C5652163DAC2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions_95B112978C1067AD4108C5652163DAC2" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions_95B112978C1067AD4108C5652163DAC2" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6F27B08E7BE1D96C233AC56521636963_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6F27B08E7BE1D96C233AC56521636963" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6F27B08E7BE1D96C233AC56521636963_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6F27B08E7BE1D96C233AC56521636963" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Fair Value [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueAbstract" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6F27B08E7BE1D96C233AC56521636963" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6F27B08E7BE1D96C233AC56521636963" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValueAbstract_6F27B08E7BE1D96C233AC56521636963" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_D40E4B7C986C8F12E5D3C5652163B417_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_D40E4B7C986C8F12E5D3C5652163B417" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_D40E4B7C986C8F12E5D3C5652163B417_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_D40E4B7C986C8F12E5D3C5652163B417" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 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_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_D40E4B7C986C8F12E5D3C5652163B417" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_D40E4B7C986C8F12E5D3C5652163B417" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_D40E4B7C986C8F12E5D3C5652163B417" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_03BA7B0A0D007759ED07C565216340E2_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_03BA7B0A0D007759ED07C565216340E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_03BA7B0A0D007759ED07C565216340E2_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_03BA7B0A0D007759ED07C565216340E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 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_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_03BA7B0A0D007759ED07C565216340E2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_03BA7B0A0D007759ED07C565216340E2" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_03BA7B0A0D007759ED07C565216340E2" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_4A0152E960C4FCFD2EA6C56521639086_totalLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_4A0152E960C4FCFD2EA6C56521639086" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Continuous Unrealized Loss Position, Fair Value</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_4A0152E960C4FCFD2EA6C56521639086_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_4A0152E960C4FCFD2EA6C56521639086" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, 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_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_4A0152E960C4FCFD2EA6C56521639086" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_4A0152E960C4FCFD2EA6C56521639086" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_4A0152E960C4FCFD2EA6C56521639086" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_81CD4D27D8AB3FF14D0EC56521634DC7_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_81CD4D27D8AB3FF14D0EC56521634DC7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_81CD4D27D8AB3FF14D0EC56521634DC7_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_81CD4D27D8AB3FF14D0EC56521634DC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_81CD4D27D8AB3FF14D0EC56521634DC7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_81CD4D27D8AB3FF14D0EC56521634DC7" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_81CD4D27D8AB3FF14D0EC56521634DC7" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_B0EF94553D7FDD6F6B87C56521636C5B_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_B0EF94553D7FDD6F6B87C56521636C5B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_B0EF94553D7FDD6F6B87C56521636C5B_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_B0EF94553D7FDD6F6B87C56521636C5B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_B0EF94553D7FDD6F6B87C56521636C5B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_B0EF94553D7FDD6F6B87C56521636C5B" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_B0EF94553D7FDD6F6B87C56521636C5B" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_39CFE256CA6F4EAE183EC5652163490D_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_39CFE256CA6F4EAE183EC5652163490D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_39CFE256CA6F4EAE183EC5652163490D_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_39CFE256CA6F4EAE183EC5652163490D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_39CFE256CA6F4EAE183EC5652163490D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_39CFE256CA6F4EAE183EC5652163490D" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_39CFE256CA6F4EAE183EC5652163490D" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_9AF3EAC66AE451271099C56521638C9B_totalLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_9AF3EAC66AE451271099C56521638C9B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss</link:label>
    <link:label id="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_9AF3EAC66AE451271099C56521638C9B_label_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_9AF3EAC66AE451271099C56521638C9B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_9AF3EAC66AE451271099C56521638C9B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_9AF3EAC66AE451271099C56521638C9B" xlink:to="lab_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_9AF3EAC66AE451271099C56521638C9B" xlink:type="arc" />
    <link:label id="lab_bokf_SecuritiesFairValueOptionSecuritiesAbstract_91630B986B8040FA0A44C5652145ABA7_label_en-US" xlink:label="lab_bokf_SecuritiesFairValueOptionSecuritiesAbstract_91630B986B8040FA0A44C5652145ABA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Securities, Fair Value Option Securities [Abstract]</link:label>
    <link:label id="lab_bokf_SecuritiesFairValueOptionSecuritiesAbstract_91630B986B8040FA0A44C5652145ABA7_documentation_en-US" xlink:label="lab_bokf_SecuritiesFairValueOptionSecuritiesAbstract_91630B986B8040FA0A44C5652145ABA7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Securities, Fair Value Option Securities [Abstract]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_SecuritiesFairValueOptionSecuritiesAbstract" xlink:label="loc_bokf_SecuritiesFairValueOptionSecuritiesAbstract_91630B986B8040FA0A44C5652145ABA7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_SecuritiesFairValueOptionSecuritiesAbstract_91630B986B8040FA0A44C5652145ABA7" xlink:to="lab_bokf_SecuritiesFairValueOptionSecuritiesAbstract_91630B986B8040FA0A44C5652145ABA7" xlink:type="arc" />
    <link:label id="lab_bokf_ScheduleOfFairValueOptionSecuritiesTable_A15310F26BA4E449E3C2C565214662C5_terseLabel_en-US" xlink:label="lab_bokf_ScheduleOfFairValueOptionSecuritiesTable_A15310F26BA4E449E3C2C565214662C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value Option Securities [Table]</link:label>
    <link:label id="lab_bokf_ScheduleOfFairValueOptionSecuritiesTable_A15310F26BA4E449E3C2C565214662C5_label_en-US" xlink:label="lab_bokf_ScheduleOfFairValueOptionSecuritiesTable_A15310F26BA4E449E3C2C565214662C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value Option Securities [Table]</link:label>
    <link:label id="lab_bokf_ScheduleOfFairValueOptionSecuritiesTable_A15310F26BA4E449E3C2C565214662C5_documentation_en-US" xlink:label="lab_bokf_ScheduleOfFairValueOptionSecuritiesTable_A15310F26BA4E449E3C2C565214662C5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value Option Securities [Table]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ScheduleOfFairValueOptionSecuritiesTable" xlink:label="loc_bokf_ScheduleOfFairValueOptionSecuritiesTable_A15310F26BA4E449E3C2C565214662C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ScheduleOfFairValueOptionSecuritiesTable_A15310F26BA4E449E3C2C565214662C5" xlink:to="lab_bokf_ScheduleOfFairValueOptionSecuritiesTable_A15310F26BA4E449E3C2C565214662C5" xlink:type="arc" />
    <link:label id="lab_bokf_ScheduleOfFairValueOptionSecuritiesLineItems_E1CB80D47B8BB701712FC5652147B20D_terseLabel_en-US" xlink:label="lab_bokf_ScheduleOfFairValueOptionSecuritiesLineItems_E1CB80D47B8BB701712FC5652147B20D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value Option Securities [Line Items]</link:label>
    <link:label id="lab_bokf_ScheduleOfFairValueOptionSecuritiesLineItems_E1CB80D47B8BB701712FC5652147B20D_label_en-US" xlink:label="lab_bokf_ScheduleOfFairValueOptionSecuritiesLineItems_E1CB80D47B8BB701712FC5652147B20D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value Option Securities [Line Items]</link:label>
    <link:label id="lab_bokf_ScheduleOfFairValueOptionSecuritiesLineItems_E1CB80D47B8BB701712FC5652147B20D_documentation_en-US" xlink:label="lab_bokf_ScheduleOfFairValueOptionSecuritiesLineItems_E1CB80D47B8BB701712FC5652147B20D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value Option Securities [Line Items]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ScheduleOfFairValueOptionSecuritiesLineItems" xlink:label="loc_bokf_ScheduleOfFairValueOptionSecuritiesLineItems_E1CB80D47B8BB701712FC5652147B20D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ScheduleOfFairValueOptionSecuritiesLineItems_E1CB80D47B8BB701712FC5652147B20D" xlink:to="lab_bokf_ScheduleOfFairValueOptionSecuritiesLineItems_E1CB80D47B8BB701712FC5652147B20D" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueOptionSecurities_1A5EF393ECD81E47426BC565214729CF_verboseLabel_en-US" xlink:label="lab_bokf_FairValueOptionSecurities_1A5EF393ECD81E47426BC565214729CF" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Option Securities, Fair Value</link:label>
    <link:label id="lab_bokf_FairValueOptionSecurities_1A5EF393ECD81E47426BC565214729CF_label_en-US" xlink:label="lab_bokf_FairValueOptionSecurities_1A5EF393ECD81E47426BC565214729CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair value option securities</link:label>
    <link:label id="lab_bokf_FairValueOptionSecurities_1A5EF393ECD81E47426BC565214729CF_documentation_en-US" xlink:label="lab_bokf_FairValueOptionSecurities_1A5EF393ECD81E47426BC565214729CF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair value option securities represent securities the Company has elected to carry at fair value and separately identified on the balance sheet with changes in fair value recognized in earnings as they occur. Certain residential mortgage-backed securities issued by US government agencies are held as an economic hedge of changes in the fair value of mortgage servicing rights and related derivative contracts. In addition, other securities may be held to manage interest rate risk or for deferred compensation purposes. Securities held for interest rate risk management may be economically hedged by derivative contracts not designated as hedging instruments effectively modify these fixed rate securities into variable rate securities.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueOptionSecurities" xlink:label="loc_bokf_FairValueOptionSecurities_1A5EF393ECD81E47426BC565214729CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueOptionSecurities_1A5EF393ECD81E47426BC565214729CF" xlink:to="lab_bokf_FairValueOptionSecurities_1A5EF393ECD81E47426BC565214729CF" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueOptionSecuritiesUnrealizedGainOrLoss_490BE8EE4650938ED530C56521471B6C_terseLabel_en-US" xlink:label="lab_bokf_FairValueOptionSecuritiesUnrealizedGainOrLoss_490BE8EE4650938ED530C56521471B6C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Option Securities, Net Unrealized Gain or Loss</link:label>
    <link:label id="lab_bokf_FairValueOptionSecuritiesUnrealizedGainOrLoss_490BE8EE4650938ED530C56521471B6C_label_en-US" xlink:label="lab_bokf_FairValueOptionSecuritiesUnrealizedGainOrLoss_490BE8EE4650938ED530C56521471B6C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Option Securities Unrealized Gain or Loss</link:label>
    <link:label id="lab_bokf_FairValueOptionSecuritiesUnrealizedGainOrLoss_490BE8EE4650938ED530C56521471B6C_documentation_en-US" xlink:label="lab_bokf_FairValueOptionSecuritiesUnrealizedGainOrLoss_490BE8EE4650938ED530C56521471B6C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This represents the unrealized holding gain or loss as of the balance sheet date on fair value option mortgage securities.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueOptionSecuritiesUnrealizedGainOrLoss" xlink:label="loc_bokf_FairValueOptionSecuritiesUnrealizedGainOrLoss_490BE8EE4650938ED530C56521471B6C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueOptionSecuritiesUnrealizedGainOrLoss_490BE8EE4650938ED530C56521471B6C" xlink:to="lab_bokf_FairValueOptionSecuritiesUnrealizedGainOrLoss_490BE8EE4650938ED530C56521471B6C" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableNetAbstract_D20E6F3BF5F8D6D0595EC1082DA820F5_label_en-US" xlink:label="lab_us-gaap_LoansReceivableNetAbstract_D20E6F3BF5F8D6D0595EC1082DA820F5" 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_D20E6F3BF5F8D6D0595EC1082DA820F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableNetAbstract_D20E6F3BF5F8D6D0595EC1082DA820F5" xlink:to="lab_us-gaap_LoansReceivableNetAbstract_D20E6F3BF5F8D6D0595EC1082DA820F5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_74F2C3B12DF9987C3BD5C1082DA9160F_verboseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_74F2C3B12DF9987C3BD5C1082DA9160F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Loans by Portfolio Segment [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_74F2C3B12DF9987C3BD5C1082DA9160F_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_74F2C3B12DF9987C3BD5C1082DA9160F" 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_74F2C3B12DF9987C3BD5C1082DA9160F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_74F2C3B12DF9987C3BD5C1082DA9160F" xlink:to="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTextBlock_74F2C3B12DF9987C3BD5C1082DA9160F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_830C79F745CE33E01728C1082DA9EF61_terseLabel_en-US" xlink:label="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_830C79F745CE33E01728C1082DA9EF61" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rollforward of Allowance For Loan Losses And Accrual for Off-Balance Sheet Credit Losses [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_830C79F745CE33E01728C1082DA9EF61_label_en-US" xlink:label="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_830C79F745CE33E01728C1082DA9EF61" 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_830C79F745CE33E01728C1082DA9EF61" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_830C79F745CE33E01728C1082DA9EF61" xlink:to="lab_us-gaap_AllowanceForCreditLossesOnFinancingReceivablesTableTextBlock_830C79F745CE33E01728C1082DA9EF61" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_2C0C26B249835E405EE7C1082DA97E2A_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_2C0C26B249835E405EE7C1082DA97E2A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Credit Quality Indicators [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_2C0C26B249835E405EE7C1082DA97E2A_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_2C0C26B249835E405EE7C1082DA97E2A" 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_2C0C26B249835E405EE7C1082DA97E2A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_2C0C26B249835E405EE7C1082DA97E2A" xlink:to="lab_us-gaap_FinancingReceivableCreditQualityIndicatorsTableTextBlock_2C0C26B249835E405EE7C1082DA97E2A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivablesTableTextBlock_926121CE09B7F078530EC1082DAA23E6_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivablesTableTextBlock_926121CE09B7F078530EC1082DAA23E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of Impaired Loans [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivablesTableTextBlock_926121CE09B7F078530EC1082DAA23E6_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivablesTableTextBlock_926121CE09B7F078530EC1082DAA23E6" 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_926121CE09B7F078530EC1082DAA23E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivablesTableTextBlock_926121CE09B7F078530EC1082DAA23E6" xlink:to="lab_us-gaap_ImpairedFinancingReceivablesTableTextBlock_926121CE09B7F078530EC1082DAA23E6" xlink:type="arc" />
    <link:label id="lab_us-gaap_PastDueFinancingReceivablesTableTextBlock_013F02924BCAE06860F8C1082DAA8E59_verboseLabel_en-US" xlink:label="lab_us-gaap_PastDueFinancingReceivablesTableTextBlock_013F02924BCAE06860F8C1082DAA8E59" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Summary of Loans by Aging Status [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_PastDueFinancingReceivablesTableTextBlock_013F02924BCAE06860F8C1082DAA8E59_label_en-US" xlink:label="lab_us-gaap_PastDueFinancingReceivablesTableTextBlock_013F02924BCAE06860F8C1082DAA8E59" 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_013F02924BCAE06860F8C1082DAA8E59" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PastDueFinancingReceivablesTableTextBlock_013F02924BCAE06860F8C1082DAA8E59" xlink:to="lab_us-gaap_PastDueFinancingReceivablesTableTextBlock_013F02924BCAE06860F8C1082DAA8E59" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountingPoliciesAbstract_DD761E24304E0668658AD47EA82E450B_label_en-US" xlink:label="lab_us-gaap_AccountingPoliciesAbstract_DD761E24304E0668658AD47EA82E450B" 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_DD761E24304E0668658AD47EA82E450B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_DD761E24304E0668658AD47EA82E450B" xlink:to="lab_us-gaap_AccountingPoliciesAbstract_DD761E24304E0668658AD47EA82E450B" xlink:type="arc" />
    <link:label id="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_9FF63AEEC7E95225C9D9D47EA82FD766_verboseLabel_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_9FF63AEEC7E95225C9D9D47EA82FD766" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Significant Accounting Policies [Text Block]</link:label>
    <link:label id="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_9FF63AEEC7E95225C9D9D47EA82FD766_label_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_9FF63AEEC7E95225C9D9D47EA82FD766" 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_9FF63AEEC7E95225C9D9D47EA82FD766" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_9FF63AEEC7E95225C9D9D47EA82FD766" xlink:to="lab_us-gaap_OrganizationConsolidationBasisOfPresentationBusinessDescriptionAndAccountingPoliciesTextBlock_9FF63AEEC7E95225C9D9D47EA82FD766" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_E7AA98DE4B6CFEB3DBADC5654BB41CD7_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_E7AA98DE4B6CFEB3DBADC5654BB41CD7" 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_E7AA98DE4B6CFEB3DBADC5654BB41CD7_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_E7AA98DE4B6CFEB3DBADC5654BB41CD7" 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_E7AA98DE4B6CFEB3DBADC5654BB41CD7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_E7AA98DE4B6CFEB3DBADC5654BB41CD7" xlink:to="lab_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_E7AA98DE4B6CFEB3DBADC5654BB41CD7" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_5AABF26E9BAC93CBEF52C5654BB5713A_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_5AABF26E9BAC93CBEF52C5654BB5713A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Financing Receivable [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_5AABF26E9BAC93CBEF52C5654BB5713A_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_5AABF26E9BAC93CBEF52C5654BB5713A" 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_5AABF26E9BAC93CBEF52C5654BB5713A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_5AABF26E9BAC93CBEF52C5654BB5713A" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_5AABF26E9BAC93CBEF52C5654BB5713A" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7ACE71E0BD000EC4577FC5654BB5317E_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7ACE71E0BD000EC4577FC5654BB5317E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Class of Financing Receivable [Domain]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7ACE71E0BD000EC4577FC5654BB5317E_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7ACE71E0BD000EC4577FC5654BB5317E" 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_7ACE71E0BD000EC4577FC5654BB5317E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7ACE71E0BD000EC4577FC5654BB5317E" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_7ACE71E0BD000EC4577FC5654BB5317E" xlink:type="arc" />
    <link:label id="lab_bokf_PermanentMortgagesGuaranteedByUsGovernmentAgenciesMember_CF40FD0E6276E1177877C5654BB50437_terseLabel_en-US" xlink:label="lab_bokf_PermanentMortgagesGuaranteedByUsGovernmentAgenciesMember_CF40FD0E6276E1177877C5654BB50437" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Permanent mortgages guaranteed by US government agencies [Member]</link:label>
    <link:label id="lab_bokf_PermanentMortgagesGuaranteedByUsGovernmentAgenciesMember_CF40FD0E6276E1177877C5654BB50437_label_en-US" xlink:label="lab_bokf_PermanentMortgagesGuaranteedByUsGovernmentAgenciesMember_CF40FD0E6276E1177877C5654BB50437" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Permanent Mortgages Guaranteed by US Government Agencies [Member]</link:label>
    <link:label id="lab_bokf_PermanentMortgagesGuaranteedByUsGovernmentAgenciesMember_CF40FD0E6276E1177877C5654BB50437_documentation_en-US" xlink:label="lab_bokf_PermanentMortgagesGuaranteedByUsGovernmentAgenciesMember_CF40FD0E6276E1177877C5654BB50437" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Class of financing receivables related to mortages for permanent residences guaranteed by U.S. government agencies.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PermanentMortgagesGuaranteedByUsGovernmentAgenciesMember" xlink:label="loc_bokf_PermanentMortgagesGuaranteedByUsGovernmentAgenciesMember_CF40FD0E6276E1177877C5654BB50437" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PermanentMortgagesGuaranteedByUsGovernmentAgenciesMember_CF40FD0E6276E1177877C5654BB50437" xlink:to="lab_bokf_PermanentMortgagesGuaranteedByUsGovernmentAgenciesMember_CF40FD0E6276E1177877C5654BB50437" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancialInstrumentPerformanceStatusAxis_C423D661B4316619E8C6C5654BB5F2A8_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialInstrumentPerformanceStatusAxis_C423D661B4316619E8C6C5654BB5F2A8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Instrument Performance Status [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancialInstrumentPerformanceStatusAxis_C423D661B4316619E8C6C5654BB5F2A8_label_en-US" xlink:label="lab_us-gaap_FinancialInstrumentPerformanceStatusAxis_C423D661B4316619E8C6C5654BB5F2A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Instrument Performance Status [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialInstrumentPerformanceStatusAxis" xlink:label="loc_us-gaap_FinancialInstrumentPerformanceStatusAxis_C423D661B4316619E8C6C5654BB5F2A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentPerformanceStatusAxis_C423D661B4316619E8C6C5654BB5F2A8" xlink:to="lab_us-gaap_FinancialInstrumentPerformanceStatusAxis_C423D661B4316619E8C6C5654BB5F2A8" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancialInstrumentPerformanceStatusDomain_D7C3053A6C29F996D92BC5654BB5A6CC_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialInstrumentPerformanceStatusDomain_D7C3053A6C29F996D92BC5654BB5A6CC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financial Instrument Performance Status [Domain]</link:label>
    <link:label id="lab_us-gaap_FinancialInstrumentPerformanceStatusDomain_D7C3053A6C29F996D92BC5654BB5A6CC_label_en-US" xlink:label="lab_us-gaap_FinancialInstrumentPerformanceStatusDomain_D7C3053A6C29F996D92BC5654BB5A6CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Instrument Performance Status [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialInstrumentPerformanceStatusDomain" xlink:label="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_D7C3053A6C29F996D92BC5654BB5A6CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_D7C3053A6C29F996D92BC5654BB5A6CC" xlink:to="lab_us-gaap_FinancialInstrumentPerformanceStatusDomain_D7C3053A6C29F996D92BC5654BB5A6CC" xlink:type="arc" />
    <link:label id="lab_us-gaap_PerformingFinancingReceivableMember_25B90FA31051ECBBA163C5654BB67B0D_verboseLabel_en-US" xlink:label="lab_us-gaap_PerformingFinancingReceivableMember_25B90FA31051ECBBA163C5654BB67B0D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accruing [Member]</link:label>
    <link:label id="lab_us-gaap_PerformingFinancingReceivableMember_25B90FA31051ECBBA163C5654BB67B0D_label_en-US" xlink:label="lab_us-gaap_PerformingFinancingReceivableMember_25B90FA31051ECBBA163C5654BB67B0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Performing Financial Instruments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PerformingFinancingReceivableMember" xlink:label="loc_us-gaap_PerformingFinancingReceivableMember_25B90FA31051ECBBA163C5654BB67B0D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PerformingFinancingReceivableMember_25B90FA31051ECBBA163C5654BB67B0D" xlink:to="lab_us-gaap_PerformingFinancingReceivableMember_25B90FA31051ECBBA163C5654BB67B0D" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivablePortfolioSegmentAxis_F467F1A73E65361DDC01C5654BB6607F_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablePortfolioSegmentAxis_F467F1A73E65361DDC01C5654BB6607F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable Portfolio Segment [Axis]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablePortfolioSegmentAxis_F467F1A73E65361DDC01C5654BB6607F_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablePortfolioSegmentAxis_F467F1A73E65361DDC01C5654BB6607F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable Portfolio Segment [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_F467F1A73E65361DDC01C5654BB6607F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_F467F1A73E65361DDC01C5654BB6607F" xlink:to="lab_us-gaap_FinancingReceivablePortfolioSegmentAxis_F467F1A73E65361DDC01C5654BB6607F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivablePortfolioSegmentDomain_AB2C27543E92E3F643FCC5654BB77810_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablePortfolioSegmentDomain_AB2C27543E92E3F643FCC5654BB77810" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable Portfolio Segment [Domain]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablePortfolioSegmentDomain_AB2C27543E92E3F643FCC5654BB77810_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablePortfolioSegmentDomain_AB2C27543E92E3F643FCC5654BB77810" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable Portfolio Segment [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_AB2C27543E92E3F643FCC5654BB77810" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_AB2C27543E92E3F643FCC5654BB77810" xlink:to="lab_us-gaap_FinancingReceivablePortfolioSegmentDomain_AB2C27543E92E3F643FCC5654BB77810" xlink:type="arc" />
    <link:label id="lab_us-gaap_ResidentialPortfolioSegmentMember_68304389165E3BA790DDC5654BB79569_terseLabel_en-US" xlink:label="lab_us-gaap_ResidentialPortfolioSegmentMember_68304389165E3BA790DDC5654BB79569" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential mortgage [Member]</link:label>
    <link:label id="lab_us-gaap_ResidentialPortfolioSegmentMember_68304389165E3BA790DDC5654BB79569_label_en-US" xlink:label="lab_us-gaap_ResidentialPortfolioSegmentMember_68304389165E3BA790DDC5654BB79569" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential 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_ResidentialPortfolioSegmentMember" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_68304389165E3BA790DDC5654BB79569" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ResidentialPortfolioSegmentMember_68304389165E3BA790DDC5654BB79569" xlink:to="lab_us-gaap_ResidentialPortfolioSegmentMember_68304389165E3BA790DDC5654BB79569" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableModificationsLineItems_B6A416AACF79B2DD6F1CC5654BB728A2_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsLineItems_B6A416AACF79B2DD6F1CC5654BB728A2" 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_B6A416AACF79B2DD6F1CC5654BB728A2_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsLineItems_B6A416AACF79B2DD6F1CC5654BB728A2" 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_B6A416AACF79B2DD6F1CC5654BB728A2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_B6A416AACF79B2DD6F1CC5654BB728A2" xlink:to="lab_us-gaap_FinancingReceivableModificationsLineItems_B6A416AACF79B2DD6F1CC5654BB728A2" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableModificationsRecordedInvestment_F6564F55B825F175CB8FC5654BB7A90C_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsRecordedInvestment_F6564F55B825F175CB8FC5654BB7A90C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Troubled Debt Restructuring, Recorded Investment</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableModificationsRecordedInvestment_F6564F55B825F175CB8FC5654BB7A90C_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsRecordedInvestment_F6564F55B825F175CB8FC5654BB7A90C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications, Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableModificationsRecordedInvestment" xlink:label="loc_us-gaap_FinancingReceivableModificationsRecordedInvestment_F6564F55B825F175CB8FC5654BB7A90C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableModificationsRecordedInvestment_F6564F55B825F175CB8FC5654BB7A90C" xlink:to="lab_us-gaap_FinancingReceivableModificationsRecordedInvestment_F6564F55B825F175CB8FC5654BB7A90C" xlink:type="arc" />
    <link:label id="lab_bokf_TroubledDebtFinancingReceivableModificationPerformingAccordingToModifiedTerms_461EDEBE03D9F1B9060DC5654BB7A0B2_terseLabel_en-US" xlink:label="lab_bokf_TroubledDebtFinancingReceivableModificationPerformingAccordingToModifiedTerms_461EDEBE03D9F1B9060DC5654BB7A0B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Troubled Debt Restructuring, Performing in Accordance With Modified Terms</link:label>
    <link:label id="lab_bokf_TroubledDebtFinancingReceivableModificationPerformingAccordingToModifiedTerms_461EDEBE03D9F1B9060DC5654BB7A0B2_label_en-US" xlink:label="lab_bokf_TroubledDebtFinancingReceivableModificationPerformingAccordingToModifiedTerms_461EDEBE03D9F1B9060DC5654BB7A0B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Troubled Debt Financing Receivable Modification Performing According To Modified Terms</link:label>
    <link:label id="lab_bokf_TroubledDebtFinancingReceivableModificationPerformingAccordingToModifiedTerms_461EDEBE03D9F1B9060DC5654BB7A0B2_documentation_en-US" xlink:label="lab_bokf_TroubledDebtFinancingReceivableModificationPerformingAccordingToModifiedTerms_461EDEBE03D9F1B9060DC5654BB7A0B2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructuring and are performing according to modified terms.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_TroubledDebtFinancingReceivableModificationPerformingAccordingToModifiedTerms" xlink:label="loc_bokf_TroubledDebtFinancingReceivableModificationPerformingAccordingToModifiedTerms_461EDEBE03D9F1B9060DC5654BB7A0B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_TroubledDebtFinancingReceivableModificationPerformingAccordingToModifiedTerms_461EDEBE03D9F1B9060DC5654BB7A0B2" xlink:to="lab_bokf_TroubledDebtFinancingReceivableModificationPerformingAccordingToModifiedTerms_461EDEBE03D9F1B9060DC5654BB7A0B2" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_B3C6BC78293DF357FF49C5654BB8F58B_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_B3C6BC78293DF357FF49C5654BB8F58B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Modifications, Post-Modification Recorded Investment</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_B3C6BC78293DF357FF49C5654BB8F58B_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_B3C6BC78293DF357FF49C5654BB8F58B" 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_B3C6BC78293DF357FF49C5654BB8F58B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_B3C6BC78293DF357FF49C5654BB8F58B" xlink:to="lab_us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2_B3C6BC78293DF357FF49C5654BB8F58B" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown_209A732758096736D6ACC5654BB85CFF_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown_209A732758096736D6ACC5654BB85CFF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Troubled Debt Restructuring, Charge-offs</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown_209A732758096736D6ACC5654BB85CFF_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown_209A732758096736D6ACC5654BB85CFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown" xlink:label="loc_us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown_209A732758096736D6ACC5654BB85CFF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown_209A732758096736D6ACC5654BB85CFF" xlink:to="lab_us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown_209A732758096736D6ACC5654BB85CFF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAbstract_82D0E4ACDFB8CCA6EA85C625525FAC1A_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAbstract_82D0E4ACDFB8CCA6EA85C625525FAC1A" 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_82D0E4ACDFB8CCA6EA85C625525FAC1A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_82D0E4ACDFB8CCA6EA85C625525FAC1A" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesAbstract_82D0E4ACDFB8CCA6EA85C625525FAC1A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_8ED3F0D777E7C9509090C62552608AC1_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_8ED3F0D777E7C9509090C62552608AC1" 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_8ED3F0D777E7C9509090C62552608AC1_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_8ED3F0D777E7C9509090C62552608AC1" 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_8ED3F0D777E7C9509090C62552608AC1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_8ED3F0D777E7C9509090C62552608AC1" xlink:to="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesTable_8ED3F0D777E7C9509090C62552608AC1" xlink:type="arc" />
    <link:label id="lab_us-gaap_USTreasurySecuritiesMember_047ED194C6F2441F1AF9C6255261B3EF_terseLabel_en-US" xlink:label="lab_us-gaap_USTreasurySecuritiesMember_047ED194C6F2441F1AF9C6255261B3EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">U.S. Treasury [Member]</link:label>
    <link:label id="lab_us-gaap_USTreasurySecuritiesMember_047ED194C6F2441F1AF9C6255261B3EF_label_en-US" xlink:label="lab_us-gaap_USTreasurySecuritiesMember_047ED194C6F2441F1AF9C6255261B3EF" 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_047ED194C6F2441F1AF9C6255261B3EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_USTreasurySecuritiesMember_047ED194C6F2441F1AF9C6255261B3EF" xlink:to="lab_us-gaap_USTreasurySecuritiesMember_047ED194C6F2441F1AF9C6255261B3EF" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_18E7D599CE300B02138EC62552613E23_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_18E7D599CE300B02138EC62552613E23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial mortgage-backed securities guaranteed by U.S. government agencies [Member]</link:label>
    <link:label id="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_18E7D599CE300B02138EC62552613E23_label_en-US" xlink:label="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_18E7D599CE300B02138EC62552613E23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial Mortgage Backed Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_18E7D599CE300B02138EC62552613E23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_18E7D599CE300B02138EC62552613E23" xlink:to="lab_us-gaap_CommercialMortgageBackedSecuritiesMember_18E7D599CE300B02138EC62552613E23" xlink:type="arc" />
    <link:label id="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_50F8D92A78DD8762FE4CC62552633304_terseLabel_en-US" xlink:label="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_50F8D92A78DD8762FE4CC62552633304" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential Mortgage Backed Securities [Member]</link:label>
    <link:label id="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_50F8D92A78DD8762FE4CC62552633304_label_en-US" xlink:label="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_50F8D92A78DD8762FE4CC62552633304" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Mortgage Backed Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_50F8D92A78DD8762FE4CC62552633304" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_50F8D92A78DD8762FE4CC62552633304" xlink:to="lab_us-gaap_ResidentialMortgageBackedSecuritiesMember_50F8D92A78DD8762FE4CC62552633304" xlink:type="arc" />
    <link:label id="lab_us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember_CD985151D77EFC187943C6255263D6F0_terseLabel_en-US" xlink:label="lab_us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember_CD985151D77EFC187943C6255263D6F0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Privately issued residential mortgage-backed securities [Member]</link:label>
    <link:label id="lab_us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember_CD985151D77EFC187943C6255263D6F0_label_en-US" xlink:label="lab_us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember_CD985151D77EFC187943C6255263D6F0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage-backed Securities, Issued by Private Enterprises [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember" xlink:label="loc_us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember_CD985151D77EFC187943C6255263D6F0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember_CD985151D77EFC187943C6255263D6F0" xlink:to="lab_us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember_CD985151D77EFC187943C6255263D6F0" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockMember_9B93A2E715A79CF0A949C6255263A20B_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockMember_9B93A2E715A79CF0A949C6255263A20B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Perpetual preferred stock [Member]</link:label>
    <link:label id="lab_us-gaap_PreferredStockMember_9B93A2E715A79CF0A949C6255263A20B_label_en-US" xlink:label="lab_us-gaap_PreferredStockMember_9B93A2E715A79CF0A949C6255263A20B" 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_9B93A2E715A79CF0A949C6255263A20B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockMember_9B93A2E715A79CF0A949C6255263A20B" xlink:to="lab_us-gaap_PreferredStockMember_9B93A2E715A79CF0A949C6255263A20B" xlink:type="arc" />
    <link:label id="lab_bokf_EquitySecuritiesAndMutualFundsMember_B30CF42CE20BB3FBB7F4C62552636889_terseLabel_en-US" xlink:label="lab_bokf_EquitySecuritiesAndMutualFundsMember_B30CF42CE20BB3FBB7F4C62552636889" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity securities and mutual funds [Member]</link:label>
    <link:label id="lab_bokf_EquitySecuritiesAndMutualFundsMember_B30CF42CE20BB3FBB7F4C62552636889_label_en-US" xlink:label="lab_bokf_EquitySecuritiesAndMutualFundsMember_B30CF42CE20BB3FBB7F4C62552636889" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Equity Securities And Mutual Funds [Member]</link:label>
    <link:label id="lab_bokf_EquitySecuritiesAndMutualFundsMember_B30CF42CE20BB3FBB7F4C62552636889_documentation_en-US" xlink:label="lab_bokf_EquitySecuritiesAndMutualFundsMember_B30CF42CE20BB3FBB7F4C62552636889" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This category includes information about ownership interests or the right to acquire ownership interests in corporations and mutual funds.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_EquitySecuritiesAndMutualFundsMember" xlink:label="loc_bokf_EquitySecuritiesAndMutualFundsMember_B30CF42CE20BB3FBB7F4C62552636889" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_EquitySecuritiesAndMutualFundsMember_B30CF42CE20BB3FBB7F4C62552636889" xlink:to="lab_bokf_EquitySecuritiesAndMutualFundsMember_B30CF42CE20BB3FBB7F4C62552636889" xlink:type="arc" />
    <link:label id="lab_invest_InvestmentIssuerAxis_21F5127C96F993EB1C22C6255263B2C1_terseLabel_en-US" xlink:label="lab_invest_InvestmentIssuerAxis_21F5127C96F993EB1C22C6255263B2C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Issuer [Axis]</link:label>
    <link:label id="lab_invest_InvestmentIssuerAxis_21F5127C96F993EB1C22C6255263B2C1_label_en-US" xlink:label="lab_invest_InvestmentIssuerAxis_21F5127C96F993EB1C22C6255263B2C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Issuer [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentIssuerAxis" xlink:label="loc_invest_InvestmentIssuerAxis_21F5127C96F993EB1C22C6255263B2C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentIssuerAxis_21F5127C96F993EB1C22C6255263B2C1" xlink:to="lab_invest_InvestmentIssuerAxis_21F5127C96F993EB1C22C6255263B2C1" xlink:type="arc" />
    <link:label id="lab_invest_InvestmentIssuerDomain_EABA714191B8F18EA879C6255263062F_terseLabel_en-US" xlink:label="lab_invest_InvestmentIssuerDomain_EABA714191B8F18EA879C6255263062F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Issuer [Domain]</link:label>
    <link:label id="lab_invest_InvestmentIssuerDomain_EABA714191B8F18EA879C6255263062F_label_en-US" xlink:label="lab_invest_InvestmentIssuerDomain_EABA714191B8F18EA879C6255263062F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Issuer [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentIssuerDomain" xlink:label="loc_invest_InvestmentIssuerDomain_EABA714191B8F18EA879C6255263062F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_InvestmentIssuerDomain_EABA714191B8F18EA879C6255263062F" xlink:to="lab_invest_InvestmentIssuerDomain_EABA714191B8F18EA879C6255263062F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember_2160AC4CD6E589670008C625526376D4_terseLabel_en-US" xlink:label="lab_us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember_2160AC4CD6E589670008C625526376D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]</link:label>
    <link:label id="lab_us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember_2160AC4CD6E589670008C625526376D4_label_en-US" xlink:label="lab_us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember_2160AC4CD6E589670008C625526376D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember" xlink:label="loc_us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember_2160AC4CD6E589670008C625526376D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember_2160AC4CD6E589670008C625526376D4" xlink:to="lab_us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember_2160AC4CD6E589670008C625526376D4" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember_A046C16FD331240B925EC62552637480_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember_A046C16FD331240B925EC62552637480" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember_A046C16FD331240B925EC62552637480_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember_A046C16FD331240B925EC62552637480" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember" xlink:label="loc_us-gaap_FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember_A046C16FD331240B925EC62552637480" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember_A046C16FD331240B925EC62552637480" xlink:to="lab_us-gaap_FederalHomeLoanMortgageCorporationCertificatesAndObligationsFHLMCMember_A046C16FD331240B925EC62552637480" xlink:type="arc" />
    <link:label id="lab_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_EC0A575F658530246FB9C62552631DAC_terseLabel_en-US" xlink:label="lab_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_EC0A575F658530246FB9C62552631DAC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Government National Mortgage Association Certificates and Obligations (GNMA) [Member]</link:label>
    <link:label id="lab_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_EC0A575F658530246FB9C62552631DAC_label_en-US" xlink:label="lab_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_EC0A575F658530246FB9C62552631DAC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Government National Mortgage Association Certificates and Obligations (GNMA) [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember" xlink:label="loc_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_EC0A575F658530246FB9C62552631DAC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_EC0A575F658530246FB9C62552631DAC" xlink:to="lab_us-gaap_GovernmentNationalMortgageAssociationCertificatesAndObligationsGNMAMember_EC0A575F658530246FB9C62552631DAC" xlink:type="arc" />
    <link:label id="lab_bokf_USAgencyResidentalMortgageBackedSecuritiesOtherMember_D8E35E964FD788720CD5C6255263658E_terseLabel_en-US" xlink:label="lab_bokf_USAgencyResidentalMortgageBackedSecuritiesOtherMember_D8E35E964FD788720CD5C6255263658E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other [Member]</link:label>
    <link:label id="lab_bokf_USAgencyResidentalMortgageBackedSecuritiesOtherMember_D8E35E964FD788720CD5C6255263658E_label_en-US" xlink:label="lab_bokf_USAgencyResidentalMortgageBackedSecuritiesOtherMember_D8E35E964FD788720CD5C6255263658E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">U.S. agency residental mortgage backed securities - Other [Member]</link:label>
    <link:label id="lab_bokf_USAgencyResidentalMortgageBackedSecuritiesOtherMember_D8E35E964FD788720CD5C6255263658E_documentation_en-US" xlink:label="lab_bokf_USAgencyResidentalMortgageBackedSecuritiesOtherMember_D8E35E964FD788720CD5C6255263658E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt securities collateralized by real estate mortgage loans (mortgages), issued by other US Government Sponsored Enterprises.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_USAgencyResidentalMortgageBackedSecuritiesOtherMember" xlink:label="loc_bokf_USAgencyResidentalMortgageBackedSecuritiesOtherMember_D8E35E964FD788720CD5C6255263658E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_USAgencyResidentalMortgageBackedSecuritiesOtherMember_D8E35E964FD788720CD5C6255263658E" xlink:to="lab_bokf_USAgencyResidentalMortgageBackedSecuritiesOtherMember_D8E35E964FD788720CD5C6255263658E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3E9067CA7464A9B80E50C62552636D92_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3E9067CA7464A9B80E50C62552636D92" 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_3E9067CA7464A9B80E50C62552636D92_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3E9067CA7464A9B80E50C62552636D92" 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_3E9067CA7464A9B80E50C62552636D92" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3E9067CA7464A9B80E50C62552636D92" xlink:to="lab_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_3E9067CA7464A9B80E50C62552636D92" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_BCBD2414125D6CE63CAAC625526333AD_totalLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_BCBD2414125D6CE63CAAC625526333AD" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Amortized Cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_BCBD2414125D6CE63CAAC625526333AD_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_BCBD2414125D6CE63CAAC625526333AD" 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_BCBD2414125D6CE63CAAC625526333AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_BCBD2414125D6CE63CAAC625526333AD" xlink:to="lab_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_BCBD2414125D6CE63CAAC625526333AD" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_52BBCD2B302B8467BADDC6255263A644_totalLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_52BBCD2B302B8467BADDC6255263A644" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Available for sale securities</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_52BBCD2B302B8467BADDC6255263A644_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_52BBCD2B302B8467BADDC6255263A644" 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_52BBCD2B302B8467BADDC6255263A644" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_52BBCD2B302B8467BADDC6255263A644" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_52BBCD2B302B8467BADDC6255263A644" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_42E2D130BCFC313DEA67C62552633CDB_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_42E2D130BCFC313DEA67C62552633CDB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Gross Unrealized Gain</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_42E2D130BCFC313DEA67C62552633CDB_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_42E2D130BCFC313DEA67C62552633CDB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, 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_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_42E2D130BCFC313DEA67C62552633CDB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_42E2D130BCFC313DEA67C62552633CDB" xlink:to="lab_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_42E2D130BCFC313DEA67C62552633CDB" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_02816E1D3CD435242B6FC625526387CB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_02816E1D3CD435242B6FC625526387CB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Gross Unrealized Loss</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_02816E1D3CD435242B6FC625526387CB_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_02816E1D3CD435242B6FC625526387CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, 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_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_02816E1D3CD435242B6FC625526387CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_02816E1D3CD435242B6FC625526387CB" xlink:to="lab_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_02816E1D3CD435242B6FC625526387CB" xlink:type="arc" />
    <link:label id="lab_bokf_DebtSecuritiesAvailableforSaleSecuritiesOtherThanTemporaryImpairments_E069BAF6E3E3BA1E9139C62552633D42_negatedLabel_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforSaleSecuritiesOtherThanTemporaryImpairments_E069BAF6E3E3BA1E9139C62552633D42" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Available-for-Sale Securities, Other Than Temporary Impairments</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforSaleSecuritiesOtherThanTemporaryImpairments_E069BAF6E3E3BA1E9139C62552633D42_label_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforSaleSecuritiesOtherThanTemporaryImpairments_E069BAF6E3E3BA1E9139C62552633D42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-Sale Securities, Other Than Temporary Impairments</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforSaleSecuritiesOtherThanTemporaryImpairments_E069BAF6E3E3BA1E9139C62552633D42_documentation_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforSaleSecuritiesOtherThanTemporaryImpairments_E069BAF6E3E3BA1E9139C62552633D42" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The unrealized loss as of the balance sheet date that remains in Accumulated Other Comprehensive Income subsequent to an other-than-temporary impairment loss being recognized in earnings.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DebtSecuritiesAvailableforSaleSecuritiesOtherThanTemporaryImpairments" xlink:label="loc_bokf_DebtSecuritiesAvailableforSaleSecuritiesOtherThanTemporaryImpairments_E069BAF6E3E3BA1E9139C62552633D42" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DebtSecuritiesAvailableforSaleSecuritiesOtherThanTemporaryImpairments_E069BAF6E3E3BA1E9139C62552633D42" xlink:to="lab_bokf_DebtSecuritiesAvailableforSaleSecuritiesOtherThanTemporaryImpairments_E069BAF6E3E3BA1E9139C62552633D42" xlink:type="arc" />
    <link:label id="lab_us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue_1FF38B7061730A1E3BD7C62552632DCD_terseLabel_en-US" xlink:label="lab_us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue_1FF38B7061730A1E3BD7C62552632DCD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pledged Assets Separately Reported, Securities Pledged as Collateral, at Fair Value</link:label>
    <link:label id="lab_us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue_1FF38B7061730A1E3BD7C62552632DCD_label_en-US" xlink:label="lab_us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue_1FF38B7061730A1E3BD7C62552632DCD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pledged Assets Separately Reported, Securities Pledged as Collateral, 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_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue" xlink:label="loc_us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue_1FF38B7061730A1E3BD7C62552632DCD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue_1FF38B7061730A1E3BD7C62552632DCD" xlink:to="lab_us-gaap_PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue_1FF38B7061730A1E3BD7C62552632DCD" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_8551C2F8C866C6BA6F95C62552634E8E_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_8551C2F8C866C6BA6F95C62552634E8E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities [Abstract]</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_8551C2F8C866C6BA6F95C62552634E8E_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_8551C2F8C866C6BA6F95C62552634E8E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_8551C2F8C866C6BA6F95C62552634E8E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_8551C2F8C866C6BA6F95C62552634E8E" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAbstract_8551C2F8C866C6BA6F95C62552634E8E" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract_1684C1DB432B6E058C74C6255263041D_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract_1684C1DB432B6E058C74C6255263041D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract_1684C1DB432B6E058C74C6255263041D_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract_1684C1DB432B6E058C74C6255263041D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Amortized Cost, Rolling Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract_1684C1DB432B6E058C74C6255263041D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract_1684C1DB432B6E058C74C6255263041D" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAmortizedCostBasisRollingMaturityAbstract_1684C1DB432B6E058C74C6255263041D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_2D074920B37A5768C2CFC62552638841_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_2D074920B37A5768C2CFC62552638841" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Less than One Year, Amortized Cost Basis</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_2D074920B37A5768C2CFC62552638841_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_2D074920B37A5768C2CFC62552638841" 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, Rolling 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_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_2D074920B37A5768C2CFC62552638841" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_2D074920B37A5768C2CFC62552638841" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_2D074920B37A5768C2CFC62552638841" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_5F0CEA65E6B484D1F4E8C62552637E20_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_5F0CEA65E6B484D1F4E8C62552637E20" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_5F0CEA65E6B484D1F4E8C62552637E20_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_5F0CEA65E6B484D1F4E8C62552637E20" 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, Rolling 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_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_5F0CEA65E6B484D1F4E8C62552637E20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_5F0CEA65E6B484D1F4E8C62552637E20" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_5F0CEA65E6B484D1F4E8C62552637E20" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_16A567B1794AA3118A49C6255263B6A5_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_16A567B1794AA3118A49C6255263B6A5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Six To Ten Years, Amortized Cost Basis</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_16A567B1794AA3118A49C6255263B6A5_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_16A567B1794AA3118A49C6255263B6A5" 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, Rolling 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_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_16A567B1794AA3118A49C6255263B6A5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_16A567B1794AA3118A49C6255263B6A5" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_16A567B1794AA3118A49C6255263B6A5" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_59834227094D83032FE9C62552635583_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_59834227094D83032FE9C62552635583" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_59834227094D83032FE9C62552635583_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_59834227094D83032FE9C62552635583" 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, Rolling 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_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_59834227094D83032FE9C62552635583" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_59834227094D83032FE9C62552635583" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_59834227094D83032FE9C62552635583" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_1A48959E48736C8A140CC6255263BAA8_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_1A48959E48736C8A140CC6255263BAA8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_1A48959E48736C8A140CC6255263BAA8_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_1A48959E48736C8A140CC6255263BAA8" 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, Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_1A48959E48736C8A140CC6255263BAA8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_1A48959E48736C8A140CC6255263BAA8" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_1A48959E48736C8A140CC6255263BAA8" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_FCA2122F4C294247BAA5C625526394EC_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_FCA2122F4C294247BAA5C625526394EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_FCA2122F4C294247BAA5C625526394EC_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_FCA2122F4C294247BAA5C625526394EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_FCA2122F4C294247BAA5C625526394EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_FCA2122F4C294247BAA5C625526394EC" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_FCA2122F4C294247BAA5C625526394EC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9C43F6B53091153819CC62552630FE1_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9C43F6B53091153819CC62552630FE1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9C43F6B53091153819CC62552630FE1_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9C43F6B53091153819CC62552630FE1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Fair Value, Rolling Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9C43F6B53091153819CC62552630FE1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9C43F6B53091153819CC62552630FE1" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesFairValueRollingMaturityAbstract_C9C43F6B53091153819CC62552630FE1" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_B77C8B9A00FC43F71022C6255263BEE9_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_B77C8B9A00FC43F71022C6255263BEE9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Less than One Year, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_B77C8B9A00FC43F71022C6255263BEE9_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_B77C8B9A00FC43F71022C6255263BEE9" 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, Rolling 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_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_B77C8B9A00FC43F71022C6255263BEE9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_B77C8B9A00FC43F71022C6255263BEE9" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_B77C8B9A00FC43F71022C6255263BEE9" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_728069DC224822D91E5EC6255263A1BA_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_728069DC224822D91E5EC6255263A1BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_728069DC224822D91E5EC6255263A1BA_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_728069DC224822D91E5EC6255263A1BA" 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, Rolling 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_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_728069DC224822D91E5EC6255263A1BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_728069DC224822D91E5EC6255263A1BA" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_728069DC224822D91E5EC6255263A1BA" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_065EC19A74410051B387C6255263A0FD_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_065EC19A74410051B387C6255263A0FD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_065EC19A74410051B387C6255263A0FD_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_065EC19A74410051B387C6255263A0FD" 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, Rolling 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_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_065EC19A74410051B387C6255263A0FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_065EC19A74410051B387C6255263A0FD" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_065EC19A74410051B387C6255263A0FD" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_625B8D2205B672291A88C62552639F8D_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_625B8D2205B672291A88C62552639F8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_625B8D2205B672291A88C62552639F8D_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_625B8D2205B672291A88C62552639F8D" 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, Rolling 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_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_625B8D2205B672291A88C62552639F8D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_625B8D2205B672291A88C62552639F8D" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_625B8D2205B672291A88C62552639F8D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_330A90117800C8893662C62552631D04_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_330A90117800C8893662C62552631D04" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_330A90117800C8893662C62552631D04_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_330A90117800C8893662C62552631D04" 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, Fair Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_330A90117800C8893662C62552631D04" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_330A90117800C8893662C62552631D04" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_330A90117800C8893662C62552631D04" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_52457E17FEF0822A218EC62552636BF2_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_52457E17FEF0822A218EC62552636BF2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_52457E17FEF0822A218EC62552636BF2_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_52457E17FEF0822A218EC62552636BF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Maturity, without Single Maturity 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_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_52457E17FEF0822A218EC62552636BF2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_52457E17FEF0822A218EC62552636BF2" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_52457E17FEF0822A218EC62552636BF2" xlink:type="arc" />
    <link:label id="lab_bokf_AvailableForSaleSecuritiesDebtMaturitiesNominalYieldAbstract_E0A8939C67A4D976AE2EC62552636E09_terseLabel_en-US" xlink:label="lab_bokf_AvailableForSaleSecuritiesDebtMaturitiesNominalYieldAbstract_E0A8939C67A4D976AE2EC62552636E09" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]</link:label>
    <link:label id="lab_bokf_AvailableForSaleSecuritiesDebtMaturitiesNominalYieldAbstract_E0A8939C67A4D976AE2EC62552636E09_label_en-US" xlink:label="lab_bokf_AvailableForSaleSecuritiesDebtMaturitiesNominalYieldAbstract_E0A8939C67A4D976AE2EC62552636E09" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]</link:label>
    <link:label id="lab_bokf_AvailableForSaleSecuritiesDebtMaturitiesNominalYieldAbstract_E0A8939C67A4D976AE2EC62552636E09_documentation_en-US" xlink:label="lab_bokf_AvailableForSaleSecuritiesDebtMaturitiesNominalYieldAbstract_E0A8939C67A4D976AE2EC62552636E09" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_AvailableForSaleSecuritiesDebtMaturitiesNominalYieldAbstract" xlink:label="loc_bokf_AvailableForSaleSecuritiesDebtMaturitiesNominalYieldAbstract_E0A8939C67A4D976AE2EC62552636E09" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_AvailableForSaleSecuritiesDebtMaturitiesNominalYieldAbstract_E0A8939C67A4D976AE2EC62552636E09" xlink:to="lab_bokf_AvailableForSaleSecuritiesDebtMaturitiesNominalYieldAbstract_E0A8939C67A4D976AE2EC62552636E09" xlink:type="arc" />
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_306EBA7A6627436AD35AC6255263F71A_terseLabel_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_306EBA7A6627436AD35AC6255263F71A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Less than One Year, Nominal Yield</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_306EBA7A6627436AD35AC6255263F71A_label_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_306EBA7A6627436AD35AC6255263F71A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Nominal Yield</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_306EBA7A6627436AD35AC6255263F71A_documentation_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_306EBA7A6627436AD35AC6255263F71A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Nominal yield of available-for-sale securities maturing in the next rolling twelve months following the balance sheet presented.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield" xlink:label="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_306EBA7A6627436AD35AC6255263F71A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_306EBA7A6627436AD35AC6255263F71A" xlink:to="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsNominalYield_306EBA7A6627436AD35AC6255263F71A" xlink:type="arc" />
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_6E3DEAC3408ED822B11CC6255263A609_terseLabel_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_6E3DEAC3408ED822B11CC6255263A609" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, One to Five Years, Nominal Yield</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_6E3DEAC3408ED822B11CC6255263A609_label_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_6E3DEAC3408ED822B11CC6255263A609" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale Securities, Debt Maturities, Rolling Year Two Through Five, Nominal Yield</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_6E3DEAC3408ED822B11CC6255263A609_documentation_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_6E3DEAC3408ED822B11CC6255263A609" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the nominal yield of available-for-sale securities maturing in the second rolling twelve months through the fifth rolling twelve months following the balance sheet date presented.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield" xlink:label="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_6E3DEAC3408ED822B11CC6255263A609" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_6E3DEAC3408ED822B11CC6255263A609" xlink:to="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveNominalYield_6E3DEAC3408ED822B11CC6255263A609" xlink:type="arc" />
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_8CC7C64E2CD8663C8EC6C6255263AAE3_terseLabel_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_8CC7C64E2CD8663C8EC6C6255263AAE3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Six To Ten Years, Nominal Yield</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_8CC7C64E2CD8663C8EC6C6255263AAE3_label_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_8CC7C64E2CD8663C8EC6C6255263AAE3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale Securities, Debt Maturities, Rolling Year Six Through Ten, Nominal Yield</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_8CC7C64E2CD8663C8EC6C6255263AAE3_documentation_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_8CC7C64E2CD8663C8EC6C6255263AAE3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the nominal yield of available-for-sale securities maturing in the sixth rolling twelve months through the tenth rolling twelve months following the balance sheet presented</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield" xlink:label="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_8CC7C64E2CD8663C8EC6C6255263AAE3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_8CC7C64E2CD8663C8EC6C6255263AAE3" xlink:to="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingYearSixThroughTenNominalYield_8CC7C64E2CD8663C8EC6C6255263AAE3" xlink:type="arc" />
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingafterYearTenNominalYield_48A3290B1816A23F05FFC62552634B7B_terseLabel_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingafterYearTenNominalYield_48A3290B1816A23F05FFC62552634B7B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Over Ten Years, Nominal Yield</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingafterYearTenNominalYield_48A3290B1816A23F05FFC62552634B7B_label_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingafterYearTenNominalYield_48A3290B1816A23F05FFC62552634B7B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale Securities, Debt Maturities, Rolling after Year Ten, Nominal Yield</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingafterYearTenNominalYield_48A3290B1816A23F05FFC62552634B7B_documentation_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingafterYearTenNominalYield_48A3290B1816A23F05FFC62552634B7B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the nominal yield of available-for-sale securities maturing after tenth rolling twevle months following the balance sheet presented</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingafterYearTenNominalYield" xlink:label="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingafterYearTenNominalYield_48A3290B1816A23F05FFC62552634B7B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingafterYearTenNominalYield_48A3290B1816A23F05FFC62552634B7B" xlink:to="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesRollingafterYearTenNominalYield_48A3290B1816A23F05FFC62552634B7B" xlink:type="arc" />
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNominalYield_7F4FF82A2EFF9C900FE0C62552635953_terseLabel_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNominalYield_7F4FF82A2EFF9C900FE0C62552635953" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Nominal Yield</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNominalYield_7F4FF82A2EFF9C900FE0C62552635953_label_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNominalYield_7F4FF82A2EFF9C900FE0C62552635953" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale Securities, Debt Maturities, Nominal Yield</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNominalYield_7F4FF82A2EFF9C900FE0C62552635953_documentation_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNominalYield_7F4FF82A2EFF9C900FE0C62552635953" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the nominal yield of available-for sale securities as of the balance sheet date.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNominalYield" xlink:label="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNominalYield_7F4FF82A2EFF9C900FE0C62552635953" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNominalYield_7F4FF82A2EFF9C900FE0C62552635953" xlink:to="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNominalYield_7F4FF82A2EFF9C900FE0C62552635953" xlink:type="arc" />
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesWeightedAverageMaturity_6066466D155C6008594AC6255263049E_terseLabel_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesWeightedAverageMaturity_6066466D155C6008594AC6255263049E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Weighted Average Maturity</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesWeightedAverageMaturity_6066466D155C6008594AC6255263049E_label_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesWeightedAverageMaturity_6066466D155C6008594AC6255263049E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale Securities, Debt Maturities, Weighted Average Maturity</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesWeightedAverageMaturity_6066466D155C6008594AC6255263049E_documentation_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesWeightedAverageMaturity_6066466D155C6008594AC6255263049E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the the contractual weighted average maturity (weighted by amount of the security) for this portion of the available-for-sale securities portfolio.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesWeightedAverageMaturity" xlink:label="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesWeightedAverageMaturity_6066466D155C6008594AC6255263049E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesWeightedAverageMaturity_6066466D155C6008594AC6255263049E" xlink:to="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesWeightedAverageMaturity_6066466D155C6008594AC6255263049E" xlink:type="arc" />
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_2D6E5677C0EAE80070EAC62552634D77_verboseLabel_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_2D6E5677C0EAE80070EAC62552634D77" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Effective tax rate for nominal yield calculation</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_2D6E5677C0EAE80070EAC62552634D77_label_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_2D6E5677C0EAE80070EAC62552634D77" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale Securities, Debt Maturities, Effective tax rate for nominal yield calculation</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_2D6E5677C0EAE80070EAC62552634D77_documentation_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_2D6E5677C0EAE80070EAC62552634D77" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Effective tax rate for nominal yield calculation for available for sale securities.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation" xlink:label="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_2D6E5677C0EAE80070EAC62552634D77" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_2D6E5677C0EAE80070EAC62552634D77" xlink:to="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesEffectivetaxratefornominalyieldcalculation_2D6E5677C0EAE80070EAC62552634D77" xlink:type="arc" />
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_DB19FDA68ACEFE53C408C62552632FC7_terseLabel_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_DB19FDA68ACEFE53C408C62552632FC7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_DB19FDA68ACEFE53C408C62552632FC7_label_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_DB19FDA68ACEFE53C408C62552632FC7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_DB19FDA68ACEFE53C408C62552632FC7_documentation_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_DB19FDA68ACEFE53C408C62552632FC7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The calculated weighted-average expected life of mortgage-backed securities based on prepayment assumptions as of the balance sheet date.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities" xlink:label="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_DB19FDA68ACEFE53C408C62552632FC7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_DB19FDA68ACEFE53C408C62552632FC7" xlink:to="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesAverageExpectedLifeofMortgagebackedSecurities_DB19FDA68ACEFE53C408C62552632FC7" xlink:type="arc" />
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNumberofdaysforinterestratestoreset_0A77139FC7574A27056FC62552636CAF_terseLabel_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNumberofdaysforinterestratestoreset_0A77139FC7574A27056FC62552636CAF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Debt Maturities, Number of days for interest rates to reset</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNumberofdaysforinterestratestoreset_0A77139FC7574A27056FC62552636CAF_label_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNumberofdaysforinterestratestoreset_0A77139FC7574A27056FC62552636CAF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale Securities, Debt Maturities, Number of days for interest rates to reset</link:label>
    <link:label id="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNumberofdaysforinterestratestoreset_0A77139FC7574A27056FC62552636CAF_documentation_en-US" xlink:label="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNumberofdaysforinterestratestoreset_0A77139FC7574A27056FC62552636CAF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of days for interest rates to reset on variable rate municipal or other debt securities.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNumberofdaysforinterestratestoreset" xlink:label="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNumberofdaysforinterestratestoreset_0A77139FC7574A27056FC62552636CAF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNumberofdaysforinterestratestoreset_0A77139FC7574A27056FC62552636CAF" xlink:to="lab_bokf_DebtSecuritiesAvailableforsaleSecuritiesDebtMaturitiesNumberofdaysforinterestratestoreset_0A77139FC7574A27056FC62552636CAF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossAbstract_88E240D46A57FE4463E3C62552630E8D_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossAbstract_88E240D46A57FE4463E3C62552630E8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Realized Gain (Loss) [Abstract]</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossAbstract_88E240D46A57FE4463E3C62552630E8D_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossAbstract_88E240D46A57FE4463E3C62552630E8D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Realized 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_AvailableForSaleSecuritiesGrossRealizedGainLossAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossAbstract_88E240D46A57FE4463E3C62552630E8D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossAbstract_88E240D46A57FE4463E3C62552630E8D" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossAbstract_88E240D46A57FE4463E3C62552630E8D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_EF20BDD05BB87AF01726C62552631BBA_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_EF20BDD05BB87AF01726C62552631BBA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sales of available for sale securities</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_EF20BDD05BB87AF01726C62552631BBA_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_EF20BDD05BB87AF01726C62552631BBA" 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_EF20BDD05BB87AF01726C62552631BBA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_EF20BDD05BB87AF01726C62552631BBA" xlink:to="lab_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_EF20BDD05BB87AF01726C62552631BBA" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_486EAE6B8C1BEA9440AFC62552635021_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_486EAE6B8C1BEA9440AFC62552635021" 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_DebtSecuritiesAvailableForSaleRealizedGain_486EAE6B8C1BEA9440AFC62552635021_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_486EAE6B8C1BEA9440AFC62552635021" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Realized Gain</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGain" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_486EAE6B8C1BEA9440AFC62552635021" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_486EAE6B8C1BEA9440AFC62552635021" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_486EAE6B8C1BEA9440AFC62552635021" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment_42F44F48C305B9BD7B56C6255263BECC_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment_42F44F48C305B9BD7B56C6255263BECC" 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_DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment_42F44F48C305B9BD7B56C6255263BECC_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment_42F44F48C305B9BD7B56C6255263BECC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Realized Loss, Excluding Other-than-temporary Impairment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment_42F44F48C305B9BD7B56C6255263BECC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment_42F44F48C305B9BD7B56C6255263BECC" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment_42F44F48C305B9BD7B56C6255263BECC" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_69AED089E550DAFBA12AC62552638325_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_69AED089E550DAFBA12AC62552638325" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Related federal and state income tax expense</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_69AED089E550DAFBA12AC62552638325_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_69AED089E550DAFBA12AC62552638325" 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_69AED089E550DAFBA12AC62552638325" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_69AED089E550DAFBA12AC62552638325" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_69AED089E550DAFBA12AC62552638325" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_FB2891579474254B60AAC625526313F5_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_FB2891579474254B60AAC625526313F5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_FB2891579474254B60AAC625526313F5_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_FB2891579474254B60AAC625526313F5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_FB2891579474254B60AAC625526313F5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_FB2891579474254B60AAC625526313F5" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAbstract_FB2891579474254B60AAC625526313F5" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_A4B7484BFD6B5ADB1498C6255263329C_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_A4B7484BFD6B5ADB1498C6255263329C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_A4B7484BFD6B5ADB1498C6255263329C_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_A4B7484BFD6B5ADB1498C6255263329C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_A4B7484BFD6B5ADB1498C6255263329C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_A4B7484BFD6B5ADB1498C6255263329C" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract_A4B7484BFD6B5ADB1498C6255263329C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_B330D43B84D1D4D3A0C2C6255263E601_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_B330D43B84D1D4D3A0C2C6255263E601" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_B330D43B84D1D4D3A0C2C6255263E601_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_B330D43B84D1D4D3A0C2C6255263E601" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_B330D43B84D1D4D3A0C2C6255263E601" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_B330D43B84D1D4D3A0C2C6255263E601" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_B330D43B84D1D4D3A0C2C6255263E601" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_0646ECA77E662485FA94C62552639716_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_0646ECA77E662485FA94C62552639716" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_0646ECA77E662485FA94C62552639716_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_0646ECA77E662485FA94C62552639716" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_0646ECA77E662485FA94C62552639716" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_0646ECA77E662485FA94C62552639716" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_0646ECA77E662485FA94C62552639716" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_3BA921BEB223BB2C2C42C6255263D570_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_3BA921BEB223BB2C2C42C6255263D570" 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 Twelve Months, Fair Value</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_3BA921BEB223BB2C2C42C6255263D570_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_3BA921BEB223BB2C2C42C6255263D570" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_3BA921BEB223BB2C2C42C6255263D570" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_3BA921BEB223BB2C2C42C6255263D570" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_3BA921BEB223BB2C2C42C6255263D570" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_636A729AF83514B2BF36C6255263A273_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_636A729AF83514B2BF36C6255263A273" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_636A729AF83514B2BF36C6255263A273_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_636A729AF83514B2BF36C6255263A273" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_636A729AF83514B2BF36C6255263A273" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_636A729AF83514B2BF36C6255263A273" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_636A729AF83514B2BF36C6255263A273" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_37D35DEF7D399F5CFD11C62552639084_totalLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_37D35DEF7D399F5CFD11C62552639084" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_37D35DEF7D399F5CFD11C62552639084_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_37D35DEF7D399F5CFD11C62552639084" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Unrealized Loss Position</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_37D35DEF7D399F5CFD11C62552639084" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_37D35DEF7D399F5CFD11C62552639084" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_37D35DEF7D399F5CFD11C62552639084" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_A38C13890B3E09E7EDF5C6255263DD63_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_A38C13890B3E09E7EDF5C6255263DD63" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]</link:label>
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_A38C13890B3E09E7EDF5C6255263DD63_label_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_A38C13890B3E09E7EDF5C6255263DD63" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_A38C13890B3E09E7EDF5C6255263DD63" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_A38C13890B3E09E7EDF5C6255263DD63" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_A38C13890B3E09E7EDF5C6255263DD63" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_3527659D511324203219C62552636D90_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_3527659D511324203219C62552636D90" 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, Accumulated Loss</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_3527659D511324203219C62552636D90_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_3527659D511324203219C62552636D90" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_3527659D511324203219C62552636D90" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_3527659D511324203219C62552636D90" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_3527659D511324203219C62552636D90" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_AC16D28B19E8DF54D6C7C62552633642_terseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_AC16D28B19E8DF54D6C7C62552633642" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_AC16D28B19E8DF54D6C7C62552633642_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_AC16D28B19E8DF54D6C7C62552633642" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_AC16D28B19E8DF54D6C7C62552633642" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_AC16D28B19E8DF54D6C7C62552633642" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_AC16D28B19E8DF54D6C7C62552633642" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_4474C8F297FA0BBF5379C6255263DE9C_totalLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_4474C8F297FA0BBF5379C6255263DE9C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_4474C8F297FA0BBF5379C6255263DE9C_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_4474C8F297FA0BBF5379C6255263DE9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_4474C8F297FA0BBF5379C6255263DE9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_4474C8F297FA0BBF5379C6255263DE9C" xlink:to="lab_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_4474C8F297FA0BBF5379C6255263DE9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfImpairedFinancingReceivableTable_ED1ED1CEA0CC5EDF0117C5654BBED2BD_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfImpairedFinancingReceivableTable_ED1ED1CEA0CC5EDF0117C5654BBED2BD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Impaired Loans [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfImpairedFinancingReceivableTable_ED1ED1CEA0CC5EDF0117C5654BBED2BD_label_en-US" xlink:label="lab_us-gaap_ScheduleOfImpairedFinancingReceivableTable_ED1ED1CEA0CC5EDF0117C5654BBED2BD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Impaired 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_ScheduleOfImpairedFinancingReceivableTable" xlink:label="loc_us-gaap_ScheduleOfImpairedFinancingReceivableTable_ED1ED1CEA0CC5EDF0117C5654BBED2BD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfImpairedFinancingReceivableTable_ED1ED1CEA0CC5EDF0117C5654BBED2BD" xlink:to="lab_us-gaap_ScheduleOfImpairedFinancingReceivableTable_ED1ED1CEA0CC5EDF0117C5654BBED2BD" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommercialPortfolioSegmentMember_72CC862453B879C2C8FAC5654BBF5B01_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialPortfolioSegmentMember_72CC862453B879C2C8FAC5654BBF5B01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial [Member]</link:label>
    <link:label id="lab_us-gaap_CommercialPortfolioSegmentMember_72CC862453B879C2C8FAC5654BBF5B01_label_en-US" xlink:label="lab_us-gaap_CommercialPortfolioSegmentMember_72CC862453B879C2C8FAC5654BBF5B01" 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_72CC862453B879C2C8FAC5654BBF5B01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommercialPortfolioSegmentMember_72CC862453B879C2C8FAC5654BBF5B01" xlink:to="lab_us-gaap_CommercialPortfolioSegmentMember_72CC862453B879C2C8FAC5654BBF5B01" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommercialRealEstatePortfolioSegmentMember_692B2BA5C81D3EC8D163C5654BBFE747_terseLabel_en-US" xlink:label="lab_us-gaap_CommercialRealEstatePortfolioSegmentMember_692B2BA5C81D3EC8D163C5654BBFE747" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial real estate [Member]</link:label>
    <link:label id="lab_us-gaap_CommercialRealEstatePortfolioSegmentMember_692B2BA5C81D3EC8D163C5654BBFE747_label_en-US" xlink:label="lab_us-gaap_CommercialRealEstatePortfolioSegmentMember_692B2BA5C81D3EC8D163C5654BBFE747" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial Real Estate 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_CommercialRealEstatePortfolioSegmentMember" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_692B2BA5C81D3EC8D163C5654BBFE747" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_692B2BA5C81D3EC8D163C5654BBFE747" xlink:to="lab_us-gaap_CommercialRealEstatePortfolioSegmentMember_692B2BA5C81D3EC8D163C5654BBFE747" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConsumerPortfolioSegmentMember_D8881631A179F371990BC5654BC050FC_terseLabel_en-US" xlink:label="lab_us-gaap_ConsumerPortfolioSegmentMember_D8881631A179F371990BC5654BC050FC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Personal [Member]</link:label>
    <link:label id="lab_us-gaap_ConsumerPortfolioSegmentMember_D8881631A179F371990BC5654BC050FC_label_en-US" xlink:label="lab_us-gaap_ConsumerPortfolioSegmentMember_D8881631A179F371990BC5654BC050FC" 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_D8881631A179F371990BC5654BC050FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConsumerPortfolioSegmentMember_D8881631A179F371990BC5654BC050FC" xlink:to="lab_us-gaap_ConsumerPortfolioSegmentMember_D8881631A179F371990BC5654BC050FC" xlink:type="arc" />
    <link:label id="lab_bokf_EnergyMember_932EEABA0E056AF8B4A8C5654BC071D0_terseLabel_en-US" xlink:label="lab_bokf_EnergyMember_932EEABA0E056AF8B4A8C5654BC071D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Energy [Member]</link:label>
    <link:label id="lab_bokf_EnergyMember_932EEABA0E056AF8B4A8C5654BC071D0_label_en-US" xlink:label="lab_bokf_EnergyMember_932EEABA0E056AF8B4A8C5654BC071D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Energy [Member]</link:label>
    <link:label id="lab_bokf_EnergyMember_932EEABA0E056AF8B4A8C5654BC071D0_documentation_en-US" xlink:label="lab_bokf_EnergyMember_932EEABA0E056AF8B4A8C5654BC071D0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Class of financing receivables related to energy industry</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_EnergyMember" xlink:label="loc_bokf_EnergyMember_932EEABA0E056AF8B4A8C5654BC071D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_EnergyMember_932EEABA0E056AF8B4A8C5654BC071D0" xlink:to="lab_bokf_EnergyMember_932EEABA0E056AF8B4A8C5654BC071D0" xlink:type="arc" />
    <link:label id="lab_bokf_ServicesMember_E42A6C07FD724CBE9401C5654BC0B04C_terseLabel_en-US" xlink:label="lab_bokf_ServicesMember_E42A6C07FD724CBE9401C5654BC0B04C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Services [Member]</link:label>
    <link:label id="lab_bokf_ServicesMember_E42A6C07FD724CBE9401C5654BC0B04C_label_en-US" xlink:label="lab_bokf_ServicesMember_E42A6C07FD724CBE9401C5654BC0B04C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Services [Member]</link:label>
    <link:label id="lab_bokf_ServicesMember_E42A6C07FD724CBE9401C5654BC0B04C_documentation_en-US" xlink:label="lab_bokf_ServicesMember_E42A6C07FD724CBE9401C5654BC0B04C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Class of financing receivables related to services industry</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ServicesMember" xlink:label="loc_bokf_ServicesMember_E42A6C07FD724CBE9401C5654BC0B04C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ServicesMember_E42A6C07FD724CBE9401C5654BC0B04C" xlink:to="lab_bokf_ServicesMember_E42A6C07FD724CBE9401C5654BC0B04C" xlink:type="arc" />
    <link:label id="lab_bokf_WholesaleAndRetailMember_79130F0D4A4A1C0BBB64C5654BC1DB86_terseLabel_en-US" xlink:label="lab_bokf_WholesaleAndRetailMember_79130F0D4A4A1C0BBB64C5654BC1DB86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wholesale/retail [Member]</link:label>
    <link:label id="lab_bokf_WholesaleAndRetailMember_79130F0D4A4A1C0BBB64C5654BC1DB86_label_en-US" xlink:label="lab_bokf_WholesaleAndRetailMember_79130F0D4A4A1C0BBB64C5654BC1DB86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Wholesale and retail [Member]</link:label>
    <link:label id="lab_bokf_WholesaleAndRetailMember_79130F0D4A4A1C0BBB64C5654BC1DB86_documentation_en-US" xlink:label="lab_bokf_WholesaleAndRetailMember_79130F0D4A4A1C0BBB64C5654BC1DB86" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Class of financing receivables related to wholesale/retail industry.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_WholesaleAndRetailMember" xlink:label="loc_bokf_WholesaleAndRetailMember_79130F0D4A4A1C0BBB64C5654BC1DB86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_WholesaleAndRetailMember_79130F0D4A4A1C0BBB64C5654BC1DB86" xlink:to="lab_bokf_WholesaleAndRetailMember_79130F0D4A4A1C0BBB64C5654BC1DB86" xlink:type="arc" />
    <link:label id="lab_bokf_ManufacturingMember_6B66C9001098BA2C9790C5654BC19726_terseLabel_en-US" xlink:label="lab_bokf_ManufacturingMember_6B66C9001098BA2C9790C5654BC19726" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Manufacturing [Member]</link:label>
    <link:label id="lab_bokf_ManufacturingMember_6B66C9001098BA2C9790C5654BC19726_label_en-US" xlink:label="lab_bokf_ManufacturingMember_6B66C9001098BA2C9790C5654BC19726" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Manufacturing [Member]</link:label>
    <link:label id="lab_bokf_ManufacturingMember_6B66C9001098BA2C9790C5654BC19726_documentation_en-US" xlink:label="lab_bokf_ManufacturingMember_6B66C9001098BA2C9790C5654BC19726" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Class of financing receivables related to manufacturing industry.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ManufacturingMember" xlink:label="loc_bokf_ManufacturingMember_6B66C9001098BA2C9790C5654BC19726" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ManufacturingMember_6B66C9001098BA2C9790C5654BC19726" xlink:to="lab_bokf_ManufacturingMember_6B66C9001098BA2C9790C5654BC19726" xlink:type="arc" />
    <link:label id="lab_us-gaap_HealthCareMember_AED0B373F3834E7F9C68C5654BC156AD_terseLabel_en-US" xlink:label="lab_us-gaap_HealthCareMember_AED0B373F3834E7F9C68C5654BC156AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Healthcare [Member]</link:label>
    <link:label id="lab_us-gaap_HealthCareMember_AED0B373F3834E7F9C68C5654BC156AD_label_en-US" xlink:label="lab_us-gaap_HealthCareMember_AED0B373F3834E7F9C68C5654BC156AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Health Care [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HealthCareMember" xlink:label="loc_us-gaap_HealthCareMember_AED0B373F3834E7F9C68C5654BC156AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HealthCareMember_AED0B373F3834E7F9C68C5654BC156AD" xlink:to="lab_us-gaap_HealthCareMember_AED0B373F3834E7F9C68C5654BC156AD" xlink:type="arc" />
    <link:label id="lab_bokf_OtherCommercialAndIndustrialMember_0D8CBDD80739DA19351BC5654BC17B9E_terseLabel_en-US" xlink:label="lab_bokf_OtherCommercialAndIndustrialMember_0D8CBDD80739DA19351BC5654BC17B9E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other commercial and industrial [Member]</link:label>
    <link:label id="lab_bokf_OtherCommercialAndIndustrialMember_0D8CBDD80739DA19351BC5654BC17B9E_label_en-US" xlink:label="lab_bokf_OtherCommercialAndIndustrialMember_0D8CBDD80739DA19351BC5654BC17B9E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Commercial and Industrial [Member]</link:label>
    <link:label id="lab_bokf_OtherCommercialAndIndustrialMember_0D8CBDD80739DA19351BC5654BC17B9E_documentation_en-US" xlink:label="lab_bokf_OtherCommercialAndIndustrialMember_0D8CBDD80739DA19351BC5654BC17B9E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Class of financing receivables related to other commercial and industrial industry.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_OtherCommercialAndIndustrialMember" xlink:label="loc_bokf_OtherCommercialAndIndustrialMember_0D8CBDD80739DA19351BC5654BC17B9E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_OtherCommercialAndIndustrialMember_0D8CBDD80739DA19351BC5654BC17B9E" xlink:to="lab_bokf_OtherCommercialAndIndustrialMember_0D8CBDD80739DA19351BC5654BC17B9E" xlink:type="arc" />
    <link:label id="lab_bokf_ResidentialconstructionandlanddevelopmentMember_A57572E95D108B2D761DC5654BC111DA_terseLabel_en-US" xlink:label="lab_bokf_ResidentialconstructionandlanddevelopmentMember_A57572E95D108B2D761DC5654BC111DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential construction and land development [Member]</link:label>
    <link:label id="lab_bokf_ResidentialconstructionandlanddevelopmentMember_A57572E95D108B2D761DC5654BC111DA_label_en-US" xlink:label="lab_bokf_ResidentialconstructionandlanddevelopmentMember_A57572E95D108B2D761DC5654BC111DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential construction and land development [Member]</link:label>
    <link:label id="lab_bokf_ResidentialconstructionandlanddevelopmentMember_A57572E95D108B2D761DC5654BC111DA_documentation_en-US" xlink:label="lab_bokf_ResidentialconstructionandlanddevelopmentMember_A57572E95D108B2D761DC5654BC111DA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Residential construction and land development [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ResidentialconstructionandlanddevelopmentMember" xlink:label="loc_bokf_ResidentialconstructionandlanddevelopmentMember_A57572E95D108B2D761DC5654BC111DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ResidentialconstructionandlanddevelopmentMember_A57572E95D108B2D761DC5654BC111DA" xlink:to="lab_bokf_ResidentialconstructionandlanddevelopmentMember_A57572E95D108B2D761DC5654BC111DA" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetailMember_A6B62D06B48F5FE1B86DC5654BC14D88_terseLabel_en-US" xlink:label="lab_us-gaap_RetailMember_A6B62D06B48F5FE1B86DC5654BC14D88" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retail [Member]</link:label>
    <link:label id="lab_us-gaap_RetailMember_A6B62D06B48F5FE1B86DC5654BC14D88_label_en-US" xlink:label="lab_us-gaap_RetailMember_A6B62D06B48F5FE1B86DC5654BC14D88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retail [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetailMember" xlink:label="loc_us-gaap_RetailMember_A6B62D06B48F5FE1B86DC5654BC14D88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetailMember_A6B62D06B48F5FE1B86DC5654BC14D88" xlink:to="lab_us-gaap_RetailMember_A6B62D06B48F5FE1B86DC5654BC14D88" xlink:type="arc" />
    <link:label id="lab_bokf_OfficeMember_2A3FB96B51D13B5CE361C5654BC19649_terseLabel_en-US" xlink:label="lab_bokf_OfficeMember_2A3FB96B51D13B5CE361C5654BC19649" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Office [Member]</link:label>
    <link:label id="lab_bokf_OfficeMember_2A3FB96B51D13B5CE361C5654BC19649_label_en-US" xlink:label="lab_bokf_OfficeMember_2A3FB96B51D13B5CE361C5654BC19649" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Office [Member]</link:label>
    <link:label id="lab_bokf_OfficeMember_2A3FB96B51D13B5CE361C5654BC19649_documentation_en-US" xlink:label="lab_bokf_OfficeMember_2A3FB96B51D13B5CE361C5654BC19649" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Class of financing receivables related for which repayment will come from the sale or rental of office space.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_OfficeMember" xlink:label="loc_bokf_OfficeMember_2A3FB96B51D13B5CE361C5654BC19649" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_OfficeMember_2A3FB96B51D13B5CE361C5654BC19649" xlink:to="lab_bokf_OfficeMember_2A3FB96B51D13B5CE361C5654BC19649" xlink:type="arc" />
    <link:label id="lab_srt_MultifamilyMember_34BC215E9BAD9D988541C5654BC228EB_terseLabel_en-US" xlink:label="lab_srt_MultifamilyMember_34BC215E9BAD9D988541C5654BC228EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Multifamily [Member]</link:label>
    <link:label id="lab_srt_MultifamilyMember_34BC215E9BAD9D988541C5654BC228EB_label_en-US" xlink:label="lab_srt_MultifamilyMember_34BC215E9BAD9D988541C5654BC228EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Multifamily [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MultifamilyMember" xlink:label="loc_srt_MultifamilyMember_34BC215E9BAD9D988541C5654BC228EB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MultifamilyMember_34BC215E9BAD9D988541C5654BC228EB" xlink:to="lab_srt_MultifamilyMember_34BC215E9BAD9D988541C5654BC228EB" xlink:type="arc" />
    <link:label id="lab_bokf_IndustrialMember_22EB149E775E66B79025C5654BC28F3E_terseLabel_en-US" xlink:label="lab_bokf_IndustrialMember_22EB149E775E66B79025C5654BC28F3E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Industrial [Member]</link:label>
    <link:label id="lab_bokf_IndustrialMember_22EB149E775E66B79025C5654BC28F3E_label_en-US" xlink:label="lab_bokf_IndustrialMember_22EB149E775E66B79025C5654BC28F3E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Industrial [Member]</link:label>
    <link:label id="lab_bokf_IndustrialMember_22EB149E775E66B79025C5654BC28F3E_documentation_en-US" xlink:label="lab_bokf_IndustrialMember_22EB149E775E66B79025C5654BC28F3E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Class of financing receivables for which repayment will come from the sale or rental of industrial facilities.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_IndustrialMember" xlink:label="loc_bokf_IndustrialMember_22EB149E775E66B79025C5654BC28F3E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_IndustrialMember_22EB149E775E66B79025C5654BC28F3E" xlink:to="lab_bokf_IndustrialMember_22EB149E775E66B79025C5654BC28F3E" xlink:type="arc" />
    <link:label id="lab_bokf_OtherCommercialRealEstateMember_7E523CA5A6D8EF9C8A4DC5654BC262F6_terseLabel_en-US" xlink:label="lab_bokf_OtherCommercialRealEstateMember_7E523CA5A6D8EF9C8A4DC5654BC262F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other commercial real estate [Member]</link:label>
    <link:label id="lab_bokf_OtherCommercialRealEstateMember_7E523CA5A6D8EF9C8A4DC5654BC262F6_label_en-US" xlink:label="lab_bokf_OtherCommercialRealEstateMember_7E523CA5A6D8EF9C8A4DC5654BC262F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Commercial Real Estate [Member]</link:label>
    <link:label id="lab_bokf_OtherCommercialRealEstateMember_7E523CA5A6D8EF9C8A4DC5654BC262F6_documentation_en-US" xlink:label="lab_bokf_OtherCommercialRealEstateMember_7E523CA5A6D8EF9C8A4DC5654BC262F6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Class of financing receivables for which repyament is expected from the sale or rental of other commercial real estate properties.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_OtherCommercialRealEstateMember" xlink:label="loc_bokf_OtherCommercialRealEstateMember_7E523CA5A6D8EF9C8A4DC5654BC262F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_OtherCommercialRealEstateMember_7E523CA5A6D8EF9C8A4DC5654BC262F6" xlink:to="lab_bokf_OtherCommercialRealEstateMember_7E523CA5A6D8EF9C8A4DC5654BC262F6" xlink:type="arc" />
    <link:label id="lab_bokf_PermanentResidentialMortgageMember_9488B6E994B38A92031CC5654BC21671_terseLabel_en-US" xlink:label="lab_bokf_PermanentResidentialMortgageMember_9488B6E994B38A92031CC5654BC21671" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Permanent mortgage [Member]</link:label>
    <link:label id="lab_bokf_PermanentResidentialMortgageMember_9488B6E994B38A92031CC5654BC21671_label_en-US" xlink:label="lab_bokf_PermanentResidentialMortgageMember_9488B6E994B38A92031CC5654BC21671" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Permanent Residential Mortgage [Member]</link:label>
    <link:label id="lab_bokf_PermanentResidentialMortgageMember_9488B6E994B38A92031CC5654BC21671_documentation_en-US" xlink:label="lab_bokf_PermanentResidentialMortgageMember_9488B6E994B38A92031CC5654BC21671" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Class of financing receivables related to mortgages of permanent residences.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PermanentResidentialMortgageMember" xlink:label="loc_bokf_PermanentResidentialMortgageMember_9488B6E994B38A92031CC5654BC21671" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PermanentResidentialMortgageMember_9488B6E994B38A92031CC5654BC21671" xlink:to="lab_bokf_PermanentResidentialMortgageMember_9488B6E994B38A92031CC5654BC21671" xlink:type="arc" />
    <link:label id="lab_us-gaap_HomeEquityMember_495F33856BF4790E330BC5654BC2C8B5_terseLabel_en-US" xlink:label="lab_us-gaap_HomeEquityMember_495F33856BF4790E330BC5654BC2C8B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Home equity [Member]</link:label>
    <link:label id="lab_us-gaap_HomeEquityMember_495F33856BF4790E330BC5654BC2C8B5_label_en-US" xlink:label="lab_us-gaap_HomeEquityMember_495F33856BF4790E330BC5654BC2C8B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Home Equity Line 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_HomeEquityMember" xlink:label="loc_us-gaap_HomeEquityMember_495F33856BF4790E330BC5654BC2C8B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HomeEquityMember_495F33856BF4790E330BC5654BC2C8B5" xlink:to="lab_us-gaap_HomeEquityMember_495F33856BF4790E330BC5654BC2C8B5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableImpairedLineItems_260505A21D7E5172E090C5654BC25670_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableImpairedLineItems_260505A21D7E5172E090C5654BC25670" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Impaired [Line Items]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableImpairedLineItems_260505A21D7E5172E090C5654BC25670_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableImpairedLineItems_260505A21D7E5172E090C5654BC25670" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Impaired [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableImpairedLineItems" xlink:label="loc_us-gaap_FinancingReceivableImpairedLineItems_260505A21D7E5172E090C5654BC25670" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_260505A21D7E5172E090C5654BC25670" xlink:to="lab_us-gaap_FinancingReceivableImpairedLineItems_260505A21D7E5172E090C5654BC25670" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoanAndLeaseReceivablesImpairedAbstract_4D81D7BC3813DD6DD693C5654BC37EF8_terseLabel_en-US" xlink:label="lab_us-gaap_LoanAndLeaseReceivablesImpairedAbstract_4D81D7BC3813DD6DD693C5654BC37EF8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired loans [Abstract]</link:label>
    <link:label id="lab_us-gaap_LoanAndLeaseReceivablesImpairedAbstract_4D81D7BC3813DD6DD693C5654BC37EF8_label_en-US" xlink:label="lab_us-gaap_LoanAndLeaseReceivablesImpairedAbstract_4D81D7BC3813DD6DD693C5654BC37EF8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loan and Lease Receivables, Impaired [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoanAndLeaseReceivablesImpairedAbstract" xlink:label="loc_us-gaap_LoanAndLeaseReceivablesImpairedAbstract_4D81D7BC3813DD6DD693C5654BC37EF8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoanAndLeaseReceivablesImpairedAbstract_4D81D7BC3813DD6DD693C5654BC37EF8" xlink:to="lab_us-gaap_LoanAndLeaseReceivablesImpairedAbstract_4D81D7BC3813DD6DD693C5654BC37EF8" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_4829206E57A57085302AC5654BC3272C_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_4829206E57A57085302AC5654BC3272C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired loans, unpaid principal balance</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_4829206E57A57085302AC5654BC3272C_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_4829206E57A57085302AC5654BC3272C" 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_4829206E57A57085302AC5654BC3272C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_4829206E57A57085302AC5654BC3272C" xlink:to="lab_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_4829206E57A57085302AC5654BC3272C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D480AB5D9C50F0737706C5654BC34D64_totalLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D480AB5D9C50F0737706C5654BC34D64" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Impaired loans, recorded investment, total</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D480AB5D9C50F0737706C5654BC34D64_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D480AB5D9C50F0737706C5654BC34D64" 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_D480AB5D9C50F0737706C5654BC34D64" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D480AB5D9C50F0737706C5654BC34D64" xlink:to="lab_us-gaap_ImpairedFinancingReceivableRecordedInvestment_D480AB5D9C50F0737706C5654BC34D64" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_DDD97543B70326D2A744C5654BC3CF05_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_DDD97543B70326D2A744C5654BC3CF05" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired loans, recorded investment with no related allowance</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_DDD97543B70326D2A744C5654BC3CF05_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_DDD97543B70326D2A744C5654BC3CF05" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivable, with No Related Allowance, Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_DDD97543B70326D2A744C5654BC3CF05" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_DDD97543B70326D2A744C5654BC3CF05" xlink:to="lab_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_DDD97543B70326D2A744C5654BC3CF05" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_B26D7C2399696ADC9B1BC5654BC3E102_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_B26D7C2399696ADC9B1BC5654BC3E102" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired loans, recorded investment with related allowance</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_B26D7C2399696ADC9B1BC5654BC3E102_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_B26D7C2399696ADC9B1BC5654BC3E102" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Financing Receivable, with Related Allowance, Recorded Investment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_B26D7C2399696ADC9B1BC5654BC3E102" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_B26D7C2399696ADC9B1BC5654BC3E102" xlink:to="lab_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_B26D7C2399696ADC9B1BC5654BC3E102" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableRelatedAllowance_6DF3788F16F69DC83D36C5654BC4972F_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableRelatedAllowance_6DF3788F16F69DC83D36C5654BC4972F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired loans, related allowance</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableRelatedAllowance_6DF3788F16F69DC83D36C5654BC4972F_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableRelatedAllowance_6DF3788F16F69DC83D36C5654BC4972F" 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_6DF3788F16F69DC83D36C5654BC4972F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableRelatedAllowance_6DF3788F16F69DC83D36C5654BC4972F" xlink:to="lab_us-gaap_ImpairedFinancingReceivableRelatedAllowance_6DF3788F16F69DC83D36C5654BC4972F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_260693C6E1584DB2B1D7C5654BC4198D_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_260693C6E1584DB2B1D7C5654BC4198D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired loans, average recorded investment</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_260693C6E1584DB2B1D7C5654BC4198D_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_260693C6E1584DB2B1D7C5654BC4198D" 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_260693C6E1584DB2B1D7C5654BC4198D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_260693C6E1584DB2B1D7C5654BC4198D" xlink:to="lab_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_260693C6E1584DB2B1D7C5654BC4198D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_846AD630633CD709090CC5654BC48E95_terseLabel_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_846AD630633CD709090CC5654BC48E95" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired loans, interest income recognized</link:label>
    <link:label id="lab_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_846AD630633CD709090CC5654BC48E95_label_en-US" xlink:label="lab_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_846AD630633CD709090CC5654BC48E95" 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_846AD630633CD709090CC5654BC48E95" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_846AD630633CD709090CC5654BC48E95" xlink:to="lab_us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod_846AD630633CD709090CC5654BC48E95" xlink:type="arc" />
    <link:label id="lab_bokf_ImpairedAffiliatedLoans_8373B4B602602C003903C5654BC40594_terseLabel_en-US" xlink:label="lab_bokf_ImpairedAffiliatedLoans_8373B4B602602C003903C5654BC40594" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Impaired loans, unpaid principal balance to affiliates</link:label>
    <link:label id="lab_bokf_ImpairedAffiliatedLoans_8373B4B602602C003903C5654BC40594_label_en-US" xlink:label="lab_bokf_ImpairedAffiliatedLoans_8373B4B602602C003903C5654BC40594" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Impaired Affiliated Loans</link:label>
    <link:label id="lab_bokf_ImpairedAffiliatedLoans_8373B4B602602C003903C5654BC40594_documentation_en-US" xlink:label="lab_bokf_ImpairedAffiliatedLoans_8373B4B602602C003903C5654BC40594" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Impaired Affiliated Loans</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ImpairedAffiliatedLoans" xlink:label="loc_bokf_ImpairedAffiliatedLoans_8373B4B602602C003903C5654BC40594" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ImpairedAffiliatedLoans_8373B4B602602C003903C5654BC40594" xlink:to="lab_bokf_ImpairedAffiliatedLoans_8373B4B602602C003903C5654BC40594" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerAbstract_4E1F952CA2F4765DC645B1468FBF00F4_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerAbstract_4E1F952CA2F4765DC645B1468FBF00F4" 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_4E1F952CA2F4765DC645B1468FBF00F4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_4E1F952CA2F4765DC645B1468FBF00F4" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerAbstract_4E1F952CA2F4765DC645B1468FBF00F4" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTable_65F743AB24901BF2E370B1468FBF15B4_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_65F743AB24901BF2E370B1468FBF15B4" 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_65F743AB24901BF2E370B1468FBF15B4_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTable_65F743AB24901BF2E370B1468FBF15B4" 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_65F743AB24901BF2E370B1468FBF15B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_65F743AB24901BF2E370B1468FBF15B4" xlink:to="lab_us-gaap_DisaggregationOfRevenueTable_65F743AB24901BF2E370B1468FBF15B4" xlink:type="arc" />
    <link:label id="lab_srt_ConsolidationItemsAxis_2548BAE319F6BC09C4E6B1468FBFAE6F_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsAxis_2548BAE319F6BC09C4E6B1468FBFAE6F" 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_2548BAE319F6BC09C4E6B1468FBFAE6F_label_en-US" xlink:label="lab_srt_ConsolidationItemsAxis_2548BAE319F6BC09C4E6B1468FBFAE6F" 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_2548BAE319F6BC09C4E6B1468FBFAE6F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsAxis_2548BAE319F6BC09C4E6B1468FBFAE6F" xlink:to="lab_srt_ConsolidationItemsAxis_2548BAE319F6BC09C4E6B1468FBFAE6F" xlink:type="arc" />
    <link:label id="lab_srt_ConsolidationItemsDomain_0CAE0E2548DA9DD9D731B1468FC009A8_terseLabel_en-US" xlink:label="lab_srt_ConsolidationItemsDomain_0CAE0E2548DA9DD9D731B1468FC009A8" 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_0CAE0E2548DA9DD9D731B1468FC009A8_label_en-US" xlink:label="lab_srt_ConsolidationItemsDomain_0CAE0E2548DA9DD9D731B1468FC009A8" 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_0CAE0E2548DA9DD9D731B1468FC009A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ConsolidationItemsDomain_0CAE0E2548DA9DD9D731B1468FC009A8" xlink:to="lab_srt_ConsolidationItemsDomain_0CAE0E2548DA9DD9D731B1468FC009A8" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingSegmentsMember_86C5E0E2D5143A0445BAB1468FC00A6F_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingSegmentsMember_86C5E0E2D5143A0445BAB1468FC00A6F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Segments [Member]</link:label>
    <link:label id="lab_us-gaap_OperatingSegmentsMember_86C5E0E2D5143A0445BAB1468FC00A6F_label_en-US" xlink:label="lab_us-gaap_OperatingSegmentsMember_86C5E0E2D5143A0445BAB1468FC00A6F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Segments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_86C5E0E2D5143A0445BAB1468FC00A6F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingSegmentsMember_86C5E0E2D5143A0445BAB1468FC00A6F" xlink:to="lab_us-gaap_OperatingSegmentsMember_86C5E0E2D5143A0445BAB1468FC00A6F" xlink:type="arc" />
    <link:label id="lab_us-gaap_CorporateNonSegmentMember_4C874C9AB16C67CD68E8B1468FC0FCEC_terseLabel_en-US" xlink:label="lab_us-gaap_CorporateNonSegmentMember_4C874C9AB16C67CD68E8B1468FC0FCEC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Funds Management and Other [Member]</link:label>
    <link:label id="lab_us-gaap_CorporateNonSegmentMember_4C874C9AB16C67CD68E8B1468FC0FCEC_label_en-US" xlink:label="lab_us-gaap_CorporateNonSegmentMember_4C874C9AB16C67CD68E8B1468FC0FCEC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Corporate, Non-Segment [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CorporateNonSegmentMember" xlink:label="loc_us-gaap_CorporateNonSegmentMember_4C874C9AB16C67CD68E8B1468FC0FCEC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CorporateNonSegmentMember_4C874C9AB16C67CD68E8B1468FC0FCEC" xlink:to="lab_us-gaap_CorporateNonSegmentMember_4C874C9AB16C67CD68E8B1468FC0FCEC" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementBusinessSegmentsAxis_F4AB729894E027809460B1468FC00799_terseLabel_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_F4AB729894E027809460B1468FC00799" 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_F4AB729894E027809460B1468FC00799_label_en-US" xlink:label="lab_us-gaap_StatementBusinessSegmentsAxis_F4AB729894E027809460B1468FC00799" 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_F4AB729894E027809460B1468FC00799" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_F4AB729894E027809460B1468FC00799" xlink:to="lab_us-gaap_StatementBusinessSegmentsAxis_F4AB729894E027809460B1468FC00799" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentDomain_ADF85D428EE783AB0D33B1468FC136A2_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain_ADF85D428EE783AB0D33B1468FC136A2" 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_ADF85D428EE783AB0D33B1468FC136A2_label_en-US" xlink:label="lab_us-gaap_SegmentDomain_ADF85D428EE783AB0D33B1468FC136A2" 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_ADF85D428EE783AB0D33B1468FC136A2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentDomain_ADF85D428EE783AB0D33B1468FC136A2" xlink:to="lab_us-gaap_SegmentDomain_ADF85D428EE783AB0D33B1468FC136A2" xlink:type="arc" />
    <link:label id="lab_bokf_CommercialMember_E60E9B6EC44E5F765425B1468FC11A2E_terseLabel_en-US" xlink:label="lab_bokf_CommercialMember_E60E9B6EC44E5F765425B1468FC11A2E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial [Member]</link:label>
    <link:label id="lab_bokf_CommercialMember_E60E9B6EC44E5F765425B1468FC11A2E_label_en-US" xlink:label="lab_bokf_CommercialMember_E60E9B6EC44E5F765425B1468FC11A2E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial [Member]</link:label>
    <link:label id="lab_bokf_CommercialMember_E60E9B6EC44E5F765425B1468FC11A2E_documentation_en-US" xlink:label="lab_bokf_CommercialMember_E60E9B6EC44E5F765425B1468FC11A2E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business segment-commercial customers.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CommercialMember" xlink:label="loc_bokf_CommercialMember_E60E9B6EC44E5F765425B1468FC11A2E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CommercialMember_E60E9B6EC44E5F765425B1468FC11A2E" xlink:to="lab_bokf_CommercialMember_E60E9B6EC44E5F765425B1468FC11A2E" xlink:type="arc" />
    <link:label id="lab_bokf_ConsumerMember_19D67E8B9C93DFBB3B45B1468FC1A09D_terseLabel_en-US" xlink:label="lab_bokf_ConsumerMember_19D67E8B9C93DFBB3B45B1468FC1A09D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Consumer [Member]</link:label>
    <link:label id="lab_bokf_ConsumerMember_19D67E8B9C93DFBB3B45B1468FC1A09D_label_en-US" xlink:label="lab_bokf_ConsumerMember_19D67E8B9C93DFBB3B45B1468FC1A09D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consumer [Member]</link:label>
    <link:label id="lab_bokf_ConsumerMember_19D67E8B9C93DFBB3B45B1468FC1A09D_documentation_en-US" xlink:label="lab_bokf_ConsumerMember_19D67E8B9C93DFBB3B45B1468FC1A09D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business segment-consumer customers.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ConsumerMember" xlink:label="loc_bokf_ConsumerMember_19D67E8B9C93DFBB3B45B1468FC1A09D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ConsumerMember_19D67E8B9C93DFBB3B45B1468FC1A09D" xlink:to="lab_bokf_ConsumerMember_19D67E8B9C93DFBB3B45B1468FC1A09D" xlink:type="arc" />
    <link:label id="lab_bokf_WealthManagementMember_B9622684FFBA7D573011B1468FC1EF9A_terseLabel_en-US" xlink:label="lab_bokf_WealthManagementMember_B9622684FFBA7D573011B1468FC1EF9A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Wealth Management [Member]</link:label>
    <link:label id="lab_bokf_WealthManagementMember_B9622684FFBA7D573011B1468FC1EF9A_label_en-US" xlink:label="lab_bokf_WealthManagementMember_B9622684FFBA7D573011B1468FC1EF9A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Wealth Management [Member]</link:label>
    <link:label id="lab_bokf_WealthManagementMember_B9622684FFBA7D573011B1468FC1EF9A_documentation_en-US" xlink:label="lab_bokf_WealthManagementMember_B9622684FFBA7D573011B1468FC1EF9A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business segment-wealth management consulting customers.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_WealthManagementMember" xlink:label="loc_bokf_WealthManagementMember_B9622684FFBA7D573011B1468FC1EF9A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_WealthManagementMember_B9622684FFBA7D573011B1468FC1EF9A" xlink:to="lab_bokf_WealthManagementMember_B9622684FFBA7D573011B1468FC1EF9A" xlink:type="arc" />
    <link:label id="lab_srt_ProductOrServiceAxis_88CE8EAD0DECD216DE4EB1468FC14D91_terseLabel_en-US" xlink:label="lab_srt_ProductOrServiceAxis_88CE8EAD0DECD216DE4EB1468FC14D91" 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_88CE8EAD0DECD216DE4EB1468FC14D91_label_en-US" xlink:label="lab_srt_ProductOrServiceAxis_88CE8EAD0DECD216DE4EB1468FC14D91" 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_88CE8EAD0DECD216DE4EB1468FC14D91" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductOrServiceAxis_88CE8EAD0DECD216DE4EB1468FC14D91" xlink:to="lab_srt_ProductOrServiceAxis_88CE8EAD0DECD216DE4EB1468FC14D91" xlink:type="arc" />
    <link:label id="lab_srt_ProductsAndServicesDomain_D6AD65C6BAB6DE38CA4BB1468FC2805A_terseLabel_en-US" xlink:label="lab_srt_ProductsAndServicesDomain_D6AD65C6BAB6DE38CA4BB1468FC2805A" 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_D6AD65C6BAB6DE38CA4BB1468FC2805A_label_en-US" xlink:label="lab_srt_ProductsAndServicesDomain_D6AD65C6BAB6DE38CA4BB1468FC2805A" 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_D6AD65C6BAB6DE38CA4BB1468FC2805A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_ProductsAndServicesDomain_D6AD65C6BAB6DE38CA4BB1468FC2805A" xlink:to="lab_srt_ProductsAndServicesDomain_D6AD65C6BAB6DE38CA4BB1468FC2805A" xlink:type="arc" />
    <link:label id="lab_bokf_FeesandcommissionsrevenueMember_765DC2568F7B909A8F06B1468FC233D0_terseLabel_en-US" xlink:label="lab_bokf_FeesandcommissionsrevenueMember_765DC2568F7B909A8F06B1468FC233D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fees and commissions revenue [Member]</link:label>
    <link:label id="lab_bokf_FeesandcommissionsrevenueMember_765DC2568F7B909A8F06B1468FC233D0_label_en-US" xlink:label="lab_bokf_FeesandcommissionsrevenueMember_765DC2568F7B909A8F06B1468FC233D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fees and commissions revenue [Member]</link:label>
    <link:label id="lab_bokf_FeesandcommissionsrevenueMember_765DC2568F7B909A8F06B1468FC233D0_documentation_en-US" xlink:label="lab_bokf_FeesandcommissionsrevenueMember_765DC2568F7B909A8F06B1468FC233D0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fees and commissions revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FeesandcommissionsrevenueMember" xlink:label="loc_bokf_FeesandcommissionsrevenueMember_765DC2568F7B909A8F06B1468FC233D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FeesandcommissionsrevenueMember_765DC2568F7B909A8F06B1468FC233D0" xlink:to="lab_bokf_FeesandcommissionsrevenueMember_765DC2568F7B909A8F06B1468FC233D0" xlink:type="arc" />
    <link:label id="lab_bokf_BrokerageandtradingrevenueMember_13B3589D49C759B9198BB1468FC2D4CF_terseLabel_en-US" xlink:label="lab_bokf_BrokerageandtradingrevenueMember_13B3589D49C759B9198BB1468FC2D4CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Brokerage and trading revenue [Member]</link:label>
    <link:label id="lab_bokf_BrokerageandtradingrevenueMember_13B3589D49C759B9198BB1468FC2D4CF_label_en-US" xlink:label="lab_bokf_BrokerageandtradingrevenueMember_13B3589D49C759B9198BB1468FC2D4CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Brokerage and trading revenue [Member]</link:label>
    <link:label id="lab_bokf_BrokerageandtradingrevenueMember_13B3589D49C759B9198BB1468FC2D4CF_documentation_en-US" xlink:label="lab_bokf_BrokerageandtradingrevenueMember_13B3589D49C759B9198BB1468FC2D4CF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Brokerage and trading revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_BrokerageandtradingrevenueMember" xlink:label="loc_bokf_BrokerageandtradingrevenueMember_13B3589D49C759B9198BB1468FC2D4CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_BrokerageandtradingrevenueMember_13B3589D49C759B9198BB1468FC2D4CF" xlink:to="lab_bokf_BrokerageandtradingrevenueMember_13B3589D49C759B9198BB1468FC2D4CF" xlink:type="arc" />
    <link:label id="lab_bokf_GainlossontradingMember_6B4E6DED1FDB485FB505B1468FC20ECA_terseLabel_en-US" xlink:label="lab_bokf_GainlossontradingMember_6B4E6DED1FDB485FB505B1468FC20ECA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading revenue [Member]</link:label>
    <link:label id="lab_bokf_GainlossontradingMember_6B4E6DED1FDB485FB505B1468FC20ECA_label_en-US" xlink:label="lab_bokf_GainlossontradingMember_6B4E6DED1FDB485FB505B1468FC20ECA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain loss on trading [Member]</link:label>
    <link:label id="lab_bokf_GainlossontradingMember_6B4E6DED1FDB485FB505B1468FC20ECA_documentation_en-US" xlink:label="lab_bokf_GainlossontradingMember_6B4E6DED1FDB485FB505B1468FC20ECA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gain loss on trading [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_GainlossontradingMember" xlink:label="loc_bokf_GainlossontradingMember_6B4E6DED1FDB485FB505B1468FC20ECA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_GainlossontradingMember_6B4E6DED1FDB485FB505B1468FC20ECA" xlink:to="lab_bokf_GainlossontradingMember_6B4E6DED1FDB485FB505B1468FC20ECA" xlink:type="arc" />
    <link:label id="lab_bokf_CustomerhedgingrevenueMember_50955F6093BAC2823E80B1468FC3E4EF_terseLabel_en-US" xlink:label="lab_bokf_CustomerhedgingrevenueMember_50955F6093BAC2823E80B1468FC3E4EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer hedging revenue [Member]</link:label>
    <link:label id="lab_bokf_CustomerhedgingrevenueMember_50955F6093BAC2823E80B1468FC3E4EF_label_en-US" xlink:label="lab_bokf_CustomerhedgingrevenueMember_50955F6093BAC2823E80B1468FC3E4EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer hedging revenue [Member]</link:label>
    <link:label id="lab_bokf_CustomerhedgingrevenueMember_50955F6093BAC2823E80B1468FC3E4EF_documentation_en-US" xlink:label="lab_bokf_CustomerhedgingrevenueMember_50955F6093BAC2823E80B1468FC3E4EF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Customer hedging revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CustomerhedgingrevenueMember" xlink:label="loc_bokf_CustomerhedgingrevenueMember_50955F6093BAC2823E80B1468FC3E4EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CustomerhedgingrevenueMember_50955F6093BAC2823E80B1468FC3E4EF" xlink:to="lab_bokf_CustomerhedgingrevenueMember_50955F6093BAC2823E80B1468FC3E4EF" xlink:type="arc" />
    <link:label id="lab_bokf_RetailbrokeragerevenueMember_80BB884E33BDD75E1276B1468FC38C3B_terseLabel_en-US" xlink:label="lab_bokf_RetailbrokeragerevenueMember_80BB884E33BDD75E1276B1468FC38C3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retail brokerage revenue [Member]</link:label>
    <link:label id="lab_bokf_RetailbrokeragerevenueMember_80BB884E33BDD75E1276B1468FC38C3B_label_en-US" xlink:label="lab_bokf_RetailbrokeragerevenueMember_80BB884E33BDD75E1276B1468FC38C3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retail brokerage revenue [Member]</link:label>
    <link:label id="lab_bokf_RetailbrokeragerevenueMember_80BB884E33BDD75E1276B1468FC38C3B_documentation_en-US" xlink:label="lab_bokf_RetailbrokeragerevenueMember_80BB884E33BDD75E1276B1468FC38C3B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Retail brokerage revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_RetailbrokeragerevenueMember" xlink:label="loc_bokf_RetailbrokeragerevenueMember_80BB884E33BDD75E1276B1468FC38C3B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_RetailbrokeragerevenueMember_80BB884E33BDD75E1276B1468FC38C3B" xlink:to="lab_bokf_RetailbrokeragerevenueMember_80BB884E33BDD75E1276B1468FC38C3B" xlink:type="arc" />
    <link:label id="lab_bokf_InvestmentbankingrevenueMember_3CC2839C5B52120DC3ACB1468FC3E1EF_terseLabel_en-US" xlink:label="lab_bokf_InvestmentbankingrevenueMember_3CC2839C5B52120DC3ACB1468FC3E1EF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment banking revenue [Member]</link:label>
    <link:label id="lab_bokf_InvestmentbankingrevenueMember_3CC2839C5B52120DC3ACB1468FC3E1EF_label_en-US" xlink:label="lab_bokf_InvestmentbankingrevenueMember_3CC2839C5B52120DC3ACB1468FC3E1EF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment banking revenue [Member]</link:label>
    <link:label id="lab_bokf_InvestmentbankingrevenueMember_3CC2839C5B52120DC3ACB1468FC3E1EF_documentation_en-US" xlink:label="lab_bokf_InvestmentbankingrevenueMember_3CC2839C5B52120DC3ACB1468FC3E1EF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment banking revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InvestmentbankingrevenueMember" xlink:label="loc_bokf_InvestmentbankingrevenueMember_3CC2839C5B52120DC3ACB1468FC3E1EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InvestmentbankingrevenueMember_3CC2839C5B52120DC3ACB1468FC3E1EF" xlink:to="lab_bokf_InvestmentbankingrevenueMember_3CC2839C5B52120DC3ACB1468FC3E1EF" xlink:type="arc" />
    <link:label id="lab_bokf_TransactioncardrevenueMember_6F2A98D2F61CF34752AFB1468FC34389_terseLabel_en-US" xlink:label="lab_bokf_TransactioncardrevenueMember_6F2A98D2F61CF34752AFB1468FC34389" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transaction card revenue [Member]</link:label>
    <link:label id="lab_bokf_TransactioncardrevenueMember_6F2A98D2F61CF34752AFB1468FC34389_label_en-US" xlink:label="lab_bokf_TransactioncardrevenueMember_6F2A98D2F61CF34752AFB1468FC34389" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Transaction card revenue [Member]</link:label>
    <link:label id="lab_bokf_TransactioncardrevenueMember_6F2A98D2F61CF34752AFB1468FC34389_documentation_en-US" xlink:label="lab_bokf_TransactioncardrevenueMember_6F2A98D2F61CF34752AFB1468FC34389" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Transaction card revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_TransactioncardrevenueMember" xlink:label="loc_bokf_TransactioncardrevenueMember_6F2A98D2F61CF34752AFB1468FC34389" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_TransactioncardrevenueMember_6F2A98D2F61CF34752AFB1468FC34389" xlink:to="lab_bokf_TransactioncardrevenueMember_6F2A98D2F61CF34752AFB1468FC34389" xlink:type="arc" />
    <link:label id="lab_bokf_TransFundEFTnetworkrevenueMember_3D4DCACA67983FD2AA0BB1468FC373B9_terseLabel_en-US" xlink:label="lab_bokf_TransFundEFTnetworkrevenueMember_3D4DCACA67983FD2AA0BB1468FC373B9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">TransFund EFT network revenue [Member]</link:label>
    <link:label id="lab_bokf_TransFundEFTnetworkrevenueMember_3D4DCACA67983FD2AA0BB1468FC373B9_label_en-US" xlink:label="lab_bokf_TransFundEFTnetworkrevenueMember_3D4DCACA67983FD2AA0BB1468FC373B9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TransFund EFT network revenue [Member]</link:label>
    <link:label id="lab_bokf_TransFundEFTnetworkrevenueMember_3D4DCACA67983FD2AA0BB1468FC373B9_documentation_en-US" xlink:label="lab_bokf_TransFundEFTnetworkrevenueMember_3D4DCACA67983FD2AA0BB1468FC373B9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">TransFund EFT network revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_TransFundEFTnetworkrevenueMember" xlink:label="loc_bokf_TransFundEFTnetworkrevenueMember_3D4DCACA67983FD2AA0BB1468FC373B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_TransFundEFTnetworkrevenueMember_3D4DCACA67983FD2AA0BB1468FC373B9" xlink:to="lab_bokf_TransFundEFTnetworkrevenueMember_3D4DCACA67983FD2AA0BB1468FC373B9" xlink:type="arc" />
    <link:label id="lab_bokf_MerchantservicesrevenueMember_ABCBD070DDAEF3AB92BBB1468FC458D9_terseLabel_en-US" xlink:label="lab_bokf_MerchantservicesrevenueMember_ABCBD070DDAEF3AB92BBB1468FC458D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Merchant services revenue [Member]</link:label>
    <link:label id="lab_bokf_MerchantservicesrevenueMember_ABCBD070DDAEF3AB92BBB1468FC458D9_label_en-US" xlink:label="lab_bokf_MerchantservicesrevenueMember_ABCBD070DDAEF3AB92BBB1468FC458D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Merchant services revenue [Member]</link:label>
    <link:label id="lab_bokf_MerchantservicesrevenueMember_ABCBD070DDAEF3AB92BBB1468FC458D9_documentation_en-US" xlink:label="lab_bokf_MerchantservicesrevenueMember_ABCBD070DDAEF3AB92BBB1468FC458D9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Merchant services revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MerchantservicesrevenueMember" xlink:label="loc_bokf_MerchantservicesrevenueMember_ABCBD070DDAEF3AB92BBB1468FC458D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MerchantservicesrevenueMember_ABCBD070DDAEF3AB92BBB1468FC458D9" xlink:to="lab_bokf_MerchantservicesrevenueMember_ABCBD070DDAEF3AB92BBB1468FC458D9" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiduciaryAndTrustMember_093C947CD3F86AAD4429B1A3C048AD28_terseLabel_en-US" xlink:label="lab_us-gaap_FiduciaryAndTrustMember_093C947CD3F86AAD4429B1A3C048AD28" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fiduciary and asset management revenue [Member]</link:label>
    <link:label id="lab_us-gaap_FiduciaryAndTrustMember_093C947CD3F86AAD4429B1A3C048AD28_label_en-US" xlink:label="lab_us-gaap_FiduciaryAndTrustMember_093C947CD3F86AAD4429B1A3C048AD28" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fiduciary and Trust [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiduciaryAndTrustMember" xlink:label="loc_us-gaap_FiduciaryAndTrustMember_093C947CD3F86AAD4429B1A3C048AD28" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiduciaryAndTrustMember_093C947CD3F86AAD4429B1A3C048AD28" xlink:to="lab_us-gaap_FiduciaryAndTrustMember_093C947CD3F86AAD4429B1A3C048AD28" xlink:type="arc" />
    <link:label id="lab_bokf_PersonaltrustrevenueMember_FE40F03A06D30044E930B1A3C04BEBB8_terseLabel_en-US" xlink:label="lab_bokf_PersonaltrustrevenueMember_FE40F03A06D30044E930B1A3C04BEBB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Personal trust revenue [Member]</link:label>
    <link:label id="lab_bokf_PersonaltrustrevenueMember_FE40F03A06D30044E930B1A3C04BEBB8_label_en-US" xlink:label="lab_bokf_PersonaltrustrevenueMember_FE40F03A06D30044E930B1A3C04BEBB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Personal trust revenue [Member]</link:label>
    <link:label id="lab_bokf_PersonaltrustrevenueMember_FE40F03A06D30044E930B1A3C04BEBB8_documentation_en-US" xlink:label="lab_bokf_PersonaltrustrevenueMember_FE40F03A06D30044E930B1A3C04BEBB8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Personal trust revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PersonaltrustrevenueMember" xlink:label="loc_bokf_PersonaltrustrevenueMember_FE40F03A06D30044E930B1A3C04BEBB8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PersonaltrustrevenueMember_FE40F03A06D30044E930B1A3C04BEBB8" xlink:to="lab_bokf_PersonaltrustrevenueMember_FE40F03A06D30044E930B1A3C04BEBB8" xlink:type="arc" />
    <link:label id="lab_bokf_CorporatetrustrevenueMember_AA3822E4725D142FD7ABB1A3C04B6BCA_terseLabel_en-US" xlink:label="lab_bokf_CorporatetrustrevenueMember_AA3822E4725D142FD7ABB1A3C04B6BCA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Corporate trust revenue [Member]</link:label>
    <link:label id="lab_bokf_CorporatetrustrevenueMember_AA3822E4725D142FD7ABB1A3C04B6BCA_label_en-US" xlink:label="lab_bokf_CorporatetrustrevenueMember_AA3822E4725D142FD7ABB1A3C04B6BCA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Corporate trust revenue [Member]</link:label>
    <link:label id="lab_bokf_CorporatetrustrevenueMember_AA3822E4725D142FD7ABB1A3C04B6BCA_documentation_en-US" xlink:label="lab_bokf_CorporatetrustrevenueMember_AA3822E4725D142FD7ABB1A3C04B6BCA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Corporate trust revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CorporatetrustrevenueMember" xlink:label="loc_bokf_CorporatetrustrevenueMember_AA3822E4725D142FD7ABB1A3C04B6BCA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CorporatetrustrevenueMember_AA3822E4725D142FD7ABB1A3C04B6BCA" xlink:to="lab_bokf_CorporatetrustrevenueMember_AA3822E4725D142FD7ABB1A3C04B6BCA" xlink:type="arc" />
    <link:label id="lab_bokf_InstitutionaltrustretirementplanservicesrevenueMember_1B0F2EC18925FC87B49BB1A3C04B5172_terseLabel_en-US" xlink:label="lab_bokf_InstitutionaltrustretirementplanservicesrevenueMember_1B0F2EC18925FC87B49BB1A3C04B5172" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Institutional trust &amp; retirement plan services revenue [Member]</link:label>
    <link:label id="lab_bokf_InstitutionaltrustretirementplanservicesrevenueMember_1B0F2EC18925FC87B49BB1A3C04B5172_label_en-US" xlink:label="lab_bokf_InstitutionaltrustretirementplanservicesrevenueMember_1B0F2EC18925FC87B49BB1A3C04B5172" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Institutional trust &amp; retirement plan services revenue [Member]</link:label>
    <link:label id="lab_bokf_InstitutionaltrustretirementplanservicesrevenueMember_1B0F2EC18925FC87B49BB1A3C04B5172_documentation_en-US" xlink:label="lab_bokf_InstitutionaltrustretirementplanservicesrevenueMember_1B0F2EC18925FC87B49BB1A3C04B5172" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Institutional trust &amp; retirement plan services revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InstitutionaltrustretirementplanservicesrevenueMember" xlink:label="loc_bokf_InstitutionaltrustretirementplanservicesrevenueMember_1B0F2EC18925FC87B49BB1A3C04B5172" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InstitutionaltrustretirementplanservicesrevenueMember_1B0F2EC18925FC87B49BB1A3C04B5172" xlink:to="lab_bokf_InstitutionaltrustretirementplanservicesrevenueMember_1B0F2EC18925FC87B49BB1A3C04B5172" xlink:type="arc" />
    <link:label id="lab_bokf_InvestmentmanagementservicesandotherMember_BA11CE87D572EA9B4FCAB1A3C04C51DA_terseLabel_en-US" xlink:label="lab_bokf_InvestmentmanagementservicesandotherMember_BA11CE87D572EA9B4FCAB1A3C04C51DA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment management services and other [Member]</link:label>
    <link:label id="lab_bokf_InvestmentmanagementservicesandotherMember_BA11CE87D572EA9B4FCAB1A3C04C51DA_label_en-US" xlink:label="lab_bokf_InvestmentmanagementservicesandotherMember_BA11CE87D572EA9B4FCAB1A3C04C51DA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment management services and other [Member]</link:label>
    <link:label id="lab_bokf_InvestmentmanagementservicesandotherMember_BA11CE87D572EA9B4FCAB1A3C04C51DA_documentation_en-US" xlink:label="lab_bokf_InvestmentmanagementservicesandotherMember_BA11CE87D572EA9B4FCAB1A3C04C51DA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Investment management services and other [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InvestmentmanagementservicesandotherMember" xlink:label="loc_bokf_InvestmentmanagementservicesandotherMember_BA11CE87D572EA9B4FCAB1A3C04C51DA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InvestmentmanagementservicesandotherMember_BA11CE87D572EA9B4FCAB1A3C04C51DA" xlink:to="lab_bokf_InvestmentmanagementservicesandotherMember_BA11CE87D572EA9B4FCAB1A3C04C51DA" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepositAccountMember_89B63489D3A261F7DD5BB1A424DCCD15_terseLabel_en-US" xlink:label="lab_us-gaap_DepositAccountMember_89B63489D3A261F7DD5BB1A424DCCD15" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deposit service charges and fees [Member]</link:label>
    <link:label id="lab_us-gaap_DepositAccountMember_89B63489D3A261F7DD5BB1A424DCCD15_label_en-US" xlink:label="lab_us-gaap_DepositAccountMember_89B63489D3A261F7DD5BB1A424DCCD15" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposit Account [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepositAccountMember" xlink:label="loc_us-gaap_DepositAccountMember_89B63489D3A261F7DD5BB1A424DCCD15" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositAccountMember_89B63489D3A261F7DD5BB1A424DCCD15" xlink:to="lab_us-gaap_DepositAccountMember_89B63489D3A261F7DD5BB1A424DCCD15" xlink:type="arc" />
    <link:label id="lab_bokf_CommercialaccountservicechargerevenueMember_003DF91A8B9796E89E2BB1A424DF880B_terseLabel_en-US" xlink:label="lab_bokf_CommercialaccountservicechargerevenueMember_003DF91A8B9796E89E2BB1A424DF880B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commercial account service charge revenue [Member]</link:label>
    <link:label id="lab_bokf_CommercialaccountservicechargerevenueMember_003DF91A8B9796E89E2BB1A424DF880B_label_en-US" xlink:label="lab_bokf_CommercialaccountservicechargerevenueMember_003DF91A8B9796E89E2BB1A424DF880B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commercial account service charge revenue [Member]</link:label>
    <link:label id="lab_bokf_CommercialaccountservicechargerevenueMember_003DF91A8B9796E89E2BB1A424DF880B_documentation_en-US" xlink:label="lab_bokf_CommercialaccountservicechargerevenueMember_003DF91A8B9796E89E2BB1A424DF880B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Commercial account service charge revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CommercialaccountservicechargerevenueMember" xlink:label="loc_bokf_CommercialaccountservicechargerevenueMember_003DF91A8B9796E89E2BB1A424DF880B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CommercialaccountservicechargerevenueMember_003DF91A8B9796E89E2BB1A424DF880B" xlink:to="lab_bokf_CommercialaccountservicechargerevenueMember_003DF91A8B9796E89E2BB1A424DF880B" xlink:type="arc" />
    <link:label id="lab_bokf_OverdraftfeerevenueMember_CEDE66C1EF86FDD853DBB1A424DF15D8_terseLabel_en-US" xlink:label="lab_bokf_OverdraftfeerevenueMember_CEDE66C1EF86FDD853DBB1A424DF15D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Overdraft fee revenue [Member]</link:label>
    <link:label id="lab_bokf_OverdraftfeerevenueMember_CEDE66C1EF86FDD853DBB1A424DF15D8_label_en-US" xlink:label="lab_bokf_OverdraftfeerevenueMember_CEDE66C1EF86FDD853DBB1A424DF15D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Overdraft fee revenue [Member]</link:label>
    <link:label id="lab_bokf_OverdraftfeerevenueMember_CEDE66C1EF86FDD853DBB1A424DF15D8_documentation_en-US" xlink:label="lab_bokf_OverdraftfeerevenueMember_CEDE66C1EF86FDD853DBB1A424DF15D8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Overdraft fee revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_OverdraftfeerevenueMember" xlink:label="loc_bokf_OverdraftfeerevenueMember_CEDE66C1EF86FDD853DBB1A424DF15D8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_OverdraftfeerevenueMember_CEDE66C1EF86FDD853DBB1A424DF15D8" xlink:to="lab_bokf_OverdraftfeerevenueMember_CEDE66C1EF86FDD853DBB1A424DF15D8" xlink:type="arc" />
    <link:label id="lab_bokf_CheckcardfeerevenueMember_805A0EFE8DA9EAA71299B1A424E0154C_terseLabel_en-US" xlink:label="lab_bokf_CheckcardfeerevenueMember_805A0EFE8DA9EAA71299B1A424E0154C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Check card fee revenue [Member]</link:label>
    <link:label id="lab_bokf_CheckcardfeerevenueMember_805A0EFE8DA9EAA71299B1A424E0154C_label_en-US" xlink:label="lab_bokf_CheckcardfeerevenueMember_805A0EFE8DA9EAA71299B1A424E0154C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Check card fee revenue [Member]</link:label>
    <link:label id="lab_bokf_CheckcardfeerevenueMember_805A0EFE8DA9EAA71299B1A424E0154C_documentation_en-US" xlink:label="lab_bokf_CheckcardfeerevenueMember_805A0EFE8DA9EAA71299B1A424E0154C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Check card fee revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CheckcardfeerevenueMember" xlink:label="loc_bokf_CheckcardfeerevenueMember_805A0EFE8DA9EAA71299B1A424E0154C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CheckcardfeerevenueMember_805A0EFE8DA9EAA71299B1A424E0154C" xlink:to="lab_bokf_CheckcardfeerevenueMember_805A0EFE8DA9EAA71299B1A424E0154C" xlink:type="arc" />
    <link:label id="lab_bokf_AutomatedservicechargeandotherdepositfeerevenueMember_D363A93883F016544D36B1A424E0A3DE_terseLabel_en-US" xlink:label="lab_bokf_AutomatedservicechargeandotherdepositfeerevenueMember_D363A93883F016544D36B1A424E0A3DE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Automated service charge and other deposit fee revenue [Member]</link:label>
    <link:label id="lab_bokf_AutomatedservicechargeandotherdepositfeerevenueMember_D363A93883F016544D36B1A424E0A3DE_label_en-US" xlink:label="lab_bokf_AutomatedservicechargeandotherdepositfeerevenueMember_D363A93883F016544D36B1A424E0A3DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Automated service charge and other deposit fee revenue [Member]</link:label>
    <link:label id="lab_bokf_AutomatedservicechargeandotherdepositfeerevenueMember_D363A93883F016544D36B1A424E0A3DE_documentation_en-US" xlink:label="lab_bokf_AutomatedservicechargeandotherdepositfeerevenueMember_D363A93883F016544D36B1A424E0A3DE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Automated service charge and other deposit fee revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_AutomatedservicechargeandotherdepositfeerevenueMember" xlink:label="loc_bokf_AutomatedservicechargeandotherdepositfeerevenueMember_D363A93883F016544D36B1A424E0A3DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_AutomatedservicechargeandotherdepositfeerevenueMember_D363A93883F016544D36B1A424E0A3DE" xlink:to="lab_bokf_AutomatedservicechargeandotherdepositfeerevenueMember_D363A93883F016544D36B1A424E0A3DE" xlink:type="arc" />
    <link:label id="lab_us-gaap_MortgageBankingMember_E3422EB5A9F305472E9BB1A495DF35B1_terseLabel_en-US" xlink:label="lab_us-gaap_MortgageBankingMember_E3422EB5A9F305472E9BB1A495DF35B1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage banking revenue [Member]</link:label>
    <link:label id="lab_us-gaap_MortgageBankingMember_E3422EB5A9F305472E9BB1A495DF35B1_label_en-US" xlink:label="lab_us-gaap_MortgageBankingMember_E3422EB5A9F305472E9BB1A495DF35B1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Banking [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MortgageBankingMember" xlink:label="loc_us-gaap_MortgageBankingMember_E3422EB5A9F305472E9BB1A495DF35B1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgageBankingMember_E3422EB5A9F305472E9BB1A495DF35B1" xlink:to="lab_us-gaap_MortgageBankingMember_E3422EB5A9F305472E9BB1A495DF35B1" xlink:type="arc" />
    <link:label id="lab_bokf_MortgageproductionrevenueMember_662E631C692AD544337AB1A495E55F32_terseLabel_en-US" xlink:label="lab_bokf_MortgageproductionrevenueMember_662E631C692AD544337AB1A495E55F32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage production revenue [Member]</link:label>
    <link:label id="lab_bokf_MortgageproductionrevenueMember_662E631C692AD544337AB1A495E55F32_label_en-US" xlink:label="lab_bokf_MortgageproductionrevenueMember_662E631C692AD544337AB1A495E55F32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage production revenue [Member]</link:label>
    <link:label id="lab_bokf_MortgageproductionrevenueMember_662E631C692AD544337AB1A495E55F32_documentation_en-US" xlink:label="lab_bokf_MortgageproductionrevenueMember_662E631C692AD544337AB1A495E55F32" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mortgage production revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MortgageproductionrevenueMember" xlink:label="loc_bokf_MortgageproductionrevenueMember_662E631C692AD544337AB1A495E55F32" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MortgageproductionrevenueMember_662E631C692AD544337AB1A495E55F32" xlink:to="lab_bokf_MortgageproductionrevenueMember_662E631C692AD544337AB1A495E55F32" xlink:type="arc" />
    <link:label id="lab_bokf_MortgageservicingrevenueMember_8DCD12CDF6354A232426B1A495E59EA3_terseLabel_en-US" xlink:label="lab_bokf_MortgageservicingrevenueMember_8DCD12CDF6354A232426B1A495E59EA3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage servicing revenue [Member]</link:label>
    <link:label id="lab_bokf_MortgageservicingrevenueMember_8DCD12CDF6354A232426B1A495E59EA3_label_en-US" xlink:label="lab_bokf_MortgageservicingrevenueMember_8DCD12CDF6354A232426B1A495E59EA3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage servicing revenue [Member]</link:label>
    <link:label id="lab_bokf_MortgageservicingrevenueMember_8DCD12CDF6354A232426B1A495E59EA3_documentation_en-US" xlink:label="lab_bokf_MortgageservicingrevenueMember_8DCD12CDF6354A232426B1A495E59EA3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mortgage servicing revenue [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MortgageservicingrevenueMember" xlink:label="loc_bokf_MortgageservicingrevenueMember_8DCD12CDF6354A232426B1A495E59EA3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MortgageservicingrevenueMember_8DCD12CDF6354A232426B1A495E59EA3" xlink:to="lab_bokf_MortgageservicingrevenueMember_8DCD12CDF6354A232426B1A495E59EA3" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancialServiceOtherMember_1C71C62937B2E485DBD3B1A5082D7148_terseLabel_en-US" xlink:label="lab_us-gaap_FinancialServiceOtherMember_1C71C62937B2E485DBD3B1A5082D7148" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other revenue [Member]</link:label>
    <link:label id="lab_us-gaap_FinancialServiceOtherMember_1C71C62937B2E485DBD3B1A5082D7148_label_en-US" xlink:label="lab_us-gaap_FinancialServiceOtherMember_1C71C62937B2E485DBD3B1A5082D7148" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financial Service, Other [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancialServiceOtherMember" xlink:label="loc_us-gaap_FinancialServiceOtherMember_1C71C62937B2E485DBD3B1A5082D7148" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancialServiceOtherMember_1C71C62937B2E485DBD3B1A5082D7148" xlink:to="lab_us-gaap_FinancialServiceOtherMember_1C71C62937B2E485DBD3B1A5082D7148" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisaggregationOfRevenueLineItems_5E5037974601C01218F3B1468FC61F4E_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueLineItems_5E5037974601C01218F3B1468FC61F4E" 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_5E5037974601C01218F3B1468FC61F4E_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueLineItems_5E5037974601C01218F3B1468FC61F4E" 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_5E5037974601C01218F3B1468FC61F4E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_5E5037974601C01218F3B1468FC61F4E" xlink:to="lab_us-gaap_DisaggregationOfRevenueLineItems_5E5037974601C01218F3B1468FC61F4E" xlink:type="arc" />
    <link:label id="lab_bokf_TotalFeesAndCommissions_CCEB12DAC3E7F4137CFDB1468FC675C8_totalLabel_en-US" xlink:label="lab_bokf_TotalFeesAndCommissions_CCEB12DAC3E7F4137CFDB1468FC675C8" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total fees and commissions</link:label>
    <link:label id="lab_bokf_TotalFeesAndCommissions_CCEB12DAC3E7F4137CFDB1468FC675C8_label_en-US" xlink:label="lab_bokf_TotalFeesAndCommissions_CCEB12DAC3E7F4137CFDB1468FC675C8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Total fees and commissions</link:label>
    <link:label id="lab_bokf_TotalFeesAndCommissions_CCEB12DAC3E7F4137CFDB1468FC675C8_documentation_en-US" xlink:label="lab_bokf_TotalFeesAndCommissions_CCEB12DAC3E7F4137CFDB1468FC675C8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total fees and commissions earned from providing services such as maintaining: depositor accounts; fiduciary and trust; brokerage and underwriting; mortgage; transaction cards; and other revenue such as bank owned life insurance.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_TotalFeesAndCommissions" xlink:label="loc_bokf_TotalFeesAndCommissions_CCEB12DAC3E7F4137CFDB1468FC675C8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_TotalFeesAndCommissions_CCEB12DAC3E7F4137CFDB1468FC675C8" xlink:to="lab_bokf_TotalFeesAndCommissions_CCEB12DAC3E7F4137CFDB1468FC675C8" xlink:type="arc" />
    <link:label id="lab_bokf_Feesandcommissionrevenuenotfromcontractswithcustomers_38250DF5BD23EDE31C78B1468FC746A5_terseLabel_en-US" xlink:label="lab_bokf_Feesandcommissionrevenuenotfromcontractswithcustomers_38250DF5BD23EDE31C78B1468FC746A5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fees and commission revenue not from contracts with customers</link:label>
    <link:label id="lab_bokf_Feesandcommissionrevenuenotfromcontractswithcustomers_38250DF5BD23EDE31C78B1468FC746A5_label_en-US" xlink:label="lab_bokf_Feesandcommissionrevenuenotfromcontractswithcustomers_38250DF5BD23EDE31C78B1468FC746A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fees and commission revenue not from contracts with customers</link:label>
    <link:label id="lab_bokf_Feesandcommissionrevenuenotfromcontractswithcustomers_38250DF5BD23EDE31C78B1468FC746A5_documentation_en-US" xlink:label="lab_bokf_Feesandcommissionrevenuenotfromcontractswithcustomers_38250DF5BD23EDE31C78B1468FC746A5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents fees and commissions revenue not in the scope of ASC 606, Revenue from Contracts with Customers, related to financial instruments or from contractual rights and obligations within the scope of other applicable accounting guidance.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Feesandcommissionrevenuenotfromcontractswithcustomers" xlink:label="loc_bokf_Feesandcommissionrevenuenotfromcontractswithcustomers_38250DF5BD23EDE31C78B1468FC746A5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Feesandcommissionrevenuenotfromcontractswithcustomers_38250DF5BD23EDE31C78B1468FC746A5" xlink:to="lab_bokf_Feesandcommissionrevenuenotfromcontractswithcustomers_38250DF5BD23EDE31C78B1468FC746A5" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9224743AD91BDA40AA29B1468FC79917_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9224743AD91BDA40AA29B1468FC79917" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fees and commissions revenue from contracts with customers</link:label>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9224743AD91BDA40AA29B1468FC79917_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9224743AD91BDA40AA29B1468FC79917" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from Contract with Customer, Excluding Assessed Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9224743AD91BDA40AA29B1468FC79917" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9224743AD91BDA40AA29B1468FC79917" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9224743AD91BDA40AA29B1468FC79917" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_1EF84A26F560F65CB456D47EA785893C_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_1EF84A26F560F65CB456D47EA785893C" 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_1EF84A26F560F65CB456D47EA785893C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_1EF84A26F560F65CB456D47EA785893C" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_1EF84A26F560F65CB456D47EA785893C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable_0AC5A6FC928A796F16D7D47EA7855AFC_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable_0AC5A6FC928A796F16D7D47EA7855AFC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Variable Interest Entities [Table]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable_0AC5A6FC928A796F16D7D47EA7855AFC_label_en-US" xlink:label="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable_0AC5A6FC928A796F16D7D47EA7855AFC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Variable Interest Entities [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_0AC5A6FC928A796F16D7D47EA7855AFC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_0AC5A6FC928A796F16D7D47EA7855AFC" xlink:to="lab_us-gaap_ScheduleOfVariableInterestEntitiesTable_0AC5A6FC928A796F16D7D47EA7855AFC" xlink:type="arc" />
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_1F03E3E3560F32004E42D47EA785EC00_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis_1F03E3E3560F32004E42D47EA785EC00" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balance Sheet Location [Axis]</link:label>
    <link:label id="lab_us-gaap_BalanceSheetLocationAxis_1F03E3E3560F32004E42D47EA785EC00_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationAxis_1F03E3E3560F32004E42D47EA785EC00" 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_1F03E3E3560F32004E42D47EA785EC00" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_1F03E3E3560F32004E42D47EA785EC00" xlink:to="lab_us-gaap_BalanceSheetLocationAxis_1F03E3E3560F32004E42D47EA785EC00" xlink:type="arc" />
    <link:label id="lab_us-gaap_BalanceSheetLocationDomain_190AD7E39F6B227E49D2D47EA785A4C2_terseLabel_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain_190AD7E39F6B227E49D2D47EA785A4C2" 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_190AD7E39F6B227E49D2D47EA785A4C2_label_en-US" xlink:label="lab_us-gaap_BalanceSheetLocationDomain_190AD7E39F6B227E49D2D47EA785A4C2" 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_190AD7E39F6B227E49D2D47EA785A4C2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_190AD7E39F6B227E49D2D47EA785A4C2" xlink:to="lab_us-gaap_BalanceSheetLocationDomain_190AD7E39F6B227E49D2D47EA785A4C2" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableMember_694F002A8683CC1981D7D47EA7853335_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableMember_694F002A8683CC1981D7D47EA7853335" 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_694F002A8683CC1981D7D47EA7853335_label_en-US" xlink:label="lab_us-gaap_LoansReceivableMember_694F002A8683CC1981D7D47EA7853335" 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_694F002A8683CC1981D7D47EA7853335" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableMember_694F002A8683CC1981D7D47EA7853335" xlink:to="lab_us-gaap_LoansReceivableMember_694F002A8683CC1981D7D47EA7853335" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAssetsMember_C977FA7F31D68B74AC10D47EA785935E_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsMember_C977FA7F31D68B74AC10D47EA785935E" 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_C977FA7F31D68B74AC10D47EA785935E_label_en-US" xlink:label="lab_us-gaap_OtherAssetsMember_C977FA7F31D68B74AC10D47EA785935E" 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_C977FA7F31D68B74AC10D47EA785935E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsMember_C977FA7F31D68B74AC10D47EA785935E" xlink:to="lab_us-gaap_OtherAssetsMember_C977FA7F31D68B74AC10D47EA785935E" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherLiabilitiesMember_8700319F83836D5D12DED47EA7852833_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesMember_8700319F83836D5D12DED47EA7852833" 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_8700319F83836D5D12DED47EA7852833_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesMember_8700319F83836D5D12DED47EA7852833" 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_8700319F83836D5D12DED47EA7852833" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesMember_8700319F83836D5D12DED47EA7852833" xlink:to="lab_us-gaap_OtherLiabilitiesMember_8700319F83836D5D12DED47EA7852833" xlink:type="arc" />
    <link:label id="lab_us-gaap_BorrowingsMember_46B19B7FB6A1D6AF4CD5D47EA785AD37_terseLabel_en-US" xlink:label="lab_us-gaap_BorrowingsMember_46B19B7FB6A1D6AF4CD5D47EA785AD37" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other borrowings [Member]</link:label>
    <link:label id="lab_us-gaap_BorrowingsMember_46B19B7FB6A1D6AF4CD5D47EA785AD37_label_en-US" xlink:label="lab_us-gaap_BorrowingsMember_46B19B7FB6A1D6AF4CD5D47EA785AD37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Borrowings [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BorrowingsMember" xlink:label="loc_us-gaap_BorrowingsMember_46B19B7FB6A1D6AF4CD5D47EA785AD37" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BorrowingsMember_46B19B7FB6A1D6AF4CD5D47EA785AD37" xlink:to="lab_us-gaap_BorrowingsMember_46B19B7FB6A1D6AF4CD5D47EA785AD37" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoncontrollingInterestMember_EE524424E0DAB5E2C99FD47EA78557AD_terseLabel_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestMember_EE524424E0DAB5E2C99FD47EA78557AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Controlling Interests [Member]</link:label>
    <link:label id="lab_us-gaap_NoncontrollingInterestMember_EE524424E0DAB5E2C99FD47EA78557AD_label_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestMember_EE524424E0DAB5E2C99FD47EA78557AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="loc_us-gaap_NoncontrollingInterestMember_EE524424E0DAB5E2C99FD47EA78557AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoncontrollingInterestMember_EE524424E0DAB5E2C99FD47EA78557AD" xlink:to="lab_us-gaap_NoncontrollingInterestMember_EE524424E0DAB5E2C99FD47EA78557AD" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_05CE8D6A1C93D37A431FD47EA7850A19_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_05CE8D6A1C93D37A431FD47EA7850A19" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Interest Entities [Axis]</link:label>
    <link:label id="lab_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_05CE8D6A1C93D37A431FD47EA7850A19_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_05CE8D6A1C93D37A431FD47EA7850A19" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entities [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_05CE8D6A1C93D37A431FD47EA7850A19" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_05CE8D6A1C93D37A431FD47EA7850A19" xlink:to="lab_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_05CE8D6A1C93D37A431FD47EA7850A19" xlink:type="arc" />
    <link:label id="lab_us-gaap_ClassificationOfVariableInterestEntityDomain_59CD6EFEC85DC04425CBD47EA7854816_terseLabel_en-US" xlink:label="lab_us-gaap_ClassificationOfVariableInterestEntityDomain_59CD6EFEC85DC04425CBD47EA7854816" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Classification [Domain]</link:label>
    <link:label id="lab_us-gaap_ClassificationOfVariableInterestEntityDomain_59CD6EFEC85DC04425CBD47EA7854816_label_en-US" xlink:label="lab_us-gaap_ClassificationOfVariableInterestEntityDomain_59CD6EFEC85DC04425CBD47EA7854816" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Classification [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_59CD6EFEC85DC04425CBD47EA7854816" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_59CD6EFEC85DC04425CBD47EA7854816" xlink:to="lab_us-gaap_ClassificationOfVariableInterestEntityDomain_59CD6EFEC85DC04425CBD47EA7854816" xlink:type="arc" />
    <link:label id="lab_bokf_PrivateEquityFundsVariableInterestEntitiesMember_B3646A3435EC9B73EA7AD47EA785157D_terseLabel_en-US" xlink:label="lab_bokf_PrivateEquityFundsVariableInterestEntitiesMember_B3646A3435EC9B73EA7AD47EA785157D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Private equity funds [Member]</link:label>
    <link:label id="lab_bokf_PrivateEquityFundsVariableInterestEntitiesMember_B3646A3435EC9B73EA7AD47EA785157D_label_en-US" xlink:label="lab_bokf_PrivateEquityFundsVariableInterestEntitiesMember_B3646A3435EC9B73EA7AD47EA785157D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Private Equity Funds Variable Interest Entities [Member]</link:label>
    <link:label id="lab_bokf_PrivateEquityFundsVariableInterestEntitiesMember_B3646A3435EC9B73EA7AD47EA785157D_documentation_en-US" xlink:label="lab_bokf_PrivateEquityFundsVariableInterestEntitiesMember_B3646A3435EC9B73EA7AD47EA785157D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Private Equity Funds Variable Interest Entities</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PrivateEquityFundsVariableInterestEntitiesMember" xlink:label="loc_bokf_PrivateEquityFundsVariableInterestEntitiesMember_B3646A3435EC9B73EA7AD47EA785157D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PrivateEquityFundsVariableInterestEntitiesMember_B3646A3435EC9B73EA7AD47EA785157D" xlink:to="lab_bokf_PrivateEquityFundsVariableInterestEntitiesMember_B3646A3435EC9B73EA7AD47EA785157D" xlink:type="arc" />
    <link:label id="lab_bokf_TaxCreditVariableInterestEntitiesMember_BC366C39B5623959AF9AD47EA785FCD3_terseLabel_en-US" xlink:label="lab_bokf_TaxCreditVariableInterestEntitiesMember_BC366C39B5623959AF9AD47EA785FCD3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tax credit entities [Member]</link:label>
    <link:label id="lab_bokf_TaxCreditVariableInterestEntitiesMember_BC366C39B5623959AF9AD47EA785FCD3_label_en-US" xlink:label="lab_bokf_TaxCreditVariableInterestEntitiesMember_BC366C39B5623959AF9AD47EA785FCD3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tax Credit Variable Interest Entities [Member]</link:label>
    <link:label id="lab_bokf_TaxCreditVariableInterestEntitiesMember_BC366C39B5623959AF9AD47EA785FCD3_documentation_en-US" xlink:label="lab_bokf_TaxCreditVariableInterestEntitiesMember_BC366C39B5623959AF9AD47EA785FCD3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tax Credit Variable Interest Entities</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_TaxCreditVariableInterestEntitiesMember" xlink:label="loc_bokf_TaxCreditVariableInterestEntitiesMember_BC366C39B5623959AF9AD47EA785FCD3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_TaxCreditVariableInterestEntitiesMember_BC366C39B5623959AF9AD47EA785FCD3" xlink:to="lab_bokf_TaxCreditVariableInterestEntitiesMember_BC366C39B5623959AF9AD47EA785FCD3" xlink:type="arc" />
    <link:label id="lab_bokf_OtherVariableInterestEntitiesMember_787CC36A9179E7788152D47EA78562B8_terseLabel_en-US" xlink:label="lab_bokf_OtherVariableInterestEntitiesMember_787CC36A9179E7788152D47EA78562B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other [Member]</link:label>
    <link:label id="lab_bokf_OtherVariableInterestEntitiesMember_787CC36A9179E7788152D47EA78562B8_label_en-US" xlink:label="lab_bokf_OtherVariableInterestEntitiesMember_787CC36A9179E7788152D47EA78562B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Variable Interest Entities [Member]</link:label>
    <link:label id="lab_bokf_OtherVariableInterestEntitiesMember_787CC36A9179E7788152D47EA78562B8_documentation_en-US" xlink:label="lab_bokf_OtherVariableInterestEntitiesMember_787CC36A9179E7788152D47EA78562B8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other Variable Interest Entities</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_OtherVariableInterestEntitiesMember" xlink:label="loc_bokf_OtherVariableInterestEntitiesMember_787CC36A9179E7788152D47EA78562B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_OtherVariableInterestEntitiesMember_787CC36A9179E7788152D47EA78562B8" xlink:to="lab_bokf_OtherVariableInterestEntitiesMember_787CC36A9179E7788152D47EA78562B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableInterestEntityLineItems_020411AE506FEF6AA2B0D47EA7855FC9_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityLineItems_020411AE506FEF6AA2B0D47EA7855FC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Interest Entity [Line Items]</link:label>
    <link:label id="lab_us-gaap_VariableInterestEntityLineItems_020411AE506FEF6AA2B0D47EA7855FC9_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityLineItems_020411AE506FEF6AA2B0D47EA7855FC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableInterestEntityLineItems" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_020411AE506FEF6AA2B0D47EA7855FC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_020411AE506FEF6AA2B0D47EA7855FC9" xlink:to="lab_us-gaap_VariableInterestEntityLineItems_020411AE506FEF6AA2B0D47EA7855FC9" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet_3394E4A566F5BCEB6D55D47EA78577AF_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet_3394E4A566F5BCEB6D55D47EA78577AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net</link:label>
    <link:label id="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet_3394E4A566F5BCEB6D55D47EA78577AF_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet_3394E4A566F5BCEB6D55D47EA78577AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Consolidated, Carrying Amount, 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_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet" xlink:label="loc_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet_3394E4A566F5BCEB6D55D47EA78577AF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet_3394E4A566F5BCEB6D55D47EA78577AF" xlink:to="lab_us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssetsAndLiabilitiesNet_3394E4A566F5BCEB6D55D47EA78577AF" xlink:type="arc" />
    <link:label id="lab_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet_007D6B905BFEAD880800D47EA7854BA0_terseLabel_en-US" xlink:label="lab_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet_007D6B905BFEAD880800D47EA7854BA0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net</link:label>
    <link:label id="lab_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet_007D6B905BFEAD880800D47EA7854BA0_label_en-US" xlink:label="lab_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet_007D6B905BFEAD880800D47EA7854BA0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Interest Entity, Nonconsolidated, Carrying Amount, 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_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet" xlink:label="loc_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet_007D6B905BFEAD880800D47EA7854BA0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet_007D6B905BFEAD880800D47EA7854BA0" xlink:to="lab_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet_007D6B905BFEAD880800D47EA7854BA0" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_56B09210F439847E1448BC015A45470E_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract_56B09210F439847E1448BC015A45470E" 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_56B09210F439847E1448BC015A45470E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_56B09210F439847E1448BC015A45470E" xlink:to="lab_us-gaap_StatementOfFinancialPositionAbstract_56B09210F439847E1448BC015A45470E" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsAbstract_308EC065B81A0B93A543BC015A45E80E_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_308EC065B81A0B93A543BC015A45E80E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_308EC065B81A0B93A543BC015A45E80E_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_308EC065B81A0B93A543BC015A45E80E" 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_308EC065B81A0B93A543BC015A45E80E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract_308EC065B81A0B93A543BC015A45E80E" xlink:to="lab_us-gaap_AssetsAbstract_308EC065B81A0B93A543BC015A45E80E" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndDueFromBanks_EC73D0D8D533AEF0C935BC015A45AACD_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndDueFromBanks_EC73D0D8D533AEF0C935BC015A45AACD" 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_EC73D0D8D533AEF0C935BC015A45AACD_label_en-US" xlink:label="lab_us-gaap_CashAndDueFromBanks_EC73D0D8D533AEF0C935BC015A45AACD" 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_EC73D0D8D533AEF0C935BC015A45AACD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndDueFromBanks_EC73D0D8D533AEF0C935BC015A45AACD" xlink:to="lab_us-gaap_CashAndDueFromBanks_EC73D0D8D533AEF0C935BC015A45AACD" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestBearingDepositsInBanks_A9CB97405AA8BB657B96BC015A4539AA_terseLabel_en-US" xlink:label="lab_us-gaap_InterestBearingDepositsInBanks_A9CB97405AA8BB657B96BC015A4539AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest-bearing cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_InterestBearingDepositsInBanks_A9CB97405AA8BB657B96BC015A4539AA_label_en-US" xlink:label="lab_us-gaap_InterestBearingDepositsInBanks_A9CB97405AA8BB657B96BC015A4539AA" 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_A9CB97405AA8BB657B96BC015A4539AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestBearingDepositsInBanks_A9CB97405AA8BB657B96BC015A4539AA" xlink:to="lab_us-gaap_InterestBearingDepositsInBanks_A9CB97405AA8BB657B96BC015A4539AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_TradingSecurities_7685719B7B1D8EE6A0D3BC015A46627D_terseLabel_en-US" xlink:label="lab_us-gaap_TradingSecurities_7685719B7B1D8EE6A0D3BC015A46627D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trading securities</link:label>
    <link:label id="lab_us-gaap_TradingSecurities_7685719B7B1D8EE6A0D3BC015A46627D_label_en-US" xlink:label="lab_us-gaap_TradingSecurities_7685719B7B1D8EE6A0D3BC015A46627D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, Trading, and 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_TradingSecurities" xlink:label="loc_us-gaap_TradingSecurities_7685719B7B1D8EE6A0D3BC015A46627D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TradingSecurities_7685719B7B1D8EE6A0D3BC015A46627D" xlink:to="lab_us-gaap_TradingSecurities_7685719B7B1D8EE6A0D3BC015A46627D" xlink:type="arc" />
    <link:label id="lab_us-gaap_HeldToMaturitySecurities_13ACD85F20F4A203C2BEBC015A460164_terseLabel_en-US" xlink:label="lab_us-gaap_HeldToMaturitySecurities_13ACD85F20F4A203C2BEBC015A460164" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_13ACD85F20F4A203C2BEBC015A460164" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_HeldToMaturitySecurities_13ACD85F20F4A203C2BEBC015A460164" xlink:to="lab_us-gaap_HeldToMaturitySecurities_13ACD85F20F4A203C2BEBC015A460164" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1E3F5F63E8C94210805CBC015A469856_terseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1E3F5F63E8C94210805CBC015A469856" xlink:role="http://www.xbrl.org/2003/role/terseLabel" 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_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1E3F5F63E8C94210805CBC015A469856" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1E3F5F63E8C94210805CBC015A469856" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1E3F5F63E8C94210805CBC015A469856" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueOptionSecurities_1FB828D846CBB44B4045BC015A46418E_terseLabel_en-US" xlink:label="lab_bokf_FairValueOptionSecurities_1FB828D846CBB44B4045BC015A46418E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair value option securities</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueOptionSecurities" xlink:label="loc_bokf_FairValueOptionSecurities_1FB828D846CBB44B4045BC015A46418E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueOptionSecurities_1FB828D846CBB44B4045BC015A46418E" xlink:to="lab_bokf_FairValueOptionSecurities_1FB828D846CBB44B4045BC015A46418E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock_3EF15F961DF36123BFE6BC015A467C77_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock_3EF15F961DF36123BFE6BC015A467C77" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted equity securities</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock_3EF15F961DF36123BFE6BC015A467C77_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock_3EF15F961DF36123BFE6BC015A467C77" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Bank Stock and Federal Reserve Bank Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock" xlink:label="loc_us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock_3EF15F961DF36123BFE6BC015A467C77" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock_3EF15F961DF36123BFE6BC015A467C77" xlink:to="lab_us-gaap_FederalHomeLoanBankStockAndFederalReserveBankStock_3EF15F961DF36123BFE6BC015A467C77" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_29EB9AB496F886021C91BC015A46F633_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_29EB9AB496F886021C91BC015A46F633" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential mortgage loans held for sale</link:label>
    <link:label id="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_29EB9AB496F886021C91BC015A46F633_label_en-US" xlink:label="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_29EB9AB496F886021C91BC015A46F633" 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, Mortgage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage" xlink:label="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_29EB9AB496F886021C91BC015A46F633" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_29EB9AB496F886021C91BC015A46F633" xlink:to="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_29EB9AB496F886021C91BC015A46F633" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_0C0D8D005DBD92C5E671BC015A472FD5_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_0C0D8D005DBD92C5E671BC015A472FD5" 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_LoansAndLeasesReceivableGrossCarryingAmount_0C0D8D005DBD92C5E671BC015A472FD5_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_0C0D8D005DBD92C5E671BC015A472FD5" 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_0C0D8D005DBD92C5E671BC015A472FD5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_0C0D8D005DBD92C5E671BC015A472FD5" xlink:to="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_0C0D8D005DBD92C5E671BC015A472FD5" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowance_AE100537C3E17490207EBC015A47E2A5_negatedLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowance_AE100537C3E17490207EBC015A47E2A5" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Allowance for loan losses</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowance_AE100537C3E17490207EBC015A47E2A5_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowance_AE100537C3E17490207EBC015A47E2A5" 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_AE100537C3E17490207EBC015A47E2A5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowance_AE100537C3E17490207EBC015A47E2A5" xlink:to="lab_us-gaap_LoansAndLeasesReceivableAllowance_AE100537C3E17490207EBC015A47E2A5" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A8724AAA0ED7C42D9C92BC015A47EA15_totalLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A8724AAA0ED7C42D9C92BC015A47EA15" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Loans, net of allowance</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A8724AAA0ED7C42D9C92BC015A47EA15_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A8724AAA0ED7C42D9C92BC015A47EA15" 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_A8724AAA0ED7C42D9C92BC015A47EA15" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A8724AAA0ED7C42D9C92BC015A47EA15" xlink:to="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_A8724AAA0ED7C42D9C92BC015A47EA15" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_F59FAFF324A49D153D6DBC015A47DC49_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_F59FAFF324A49D153D6DBC015A47DC49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Premises and equipment, net</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_F59FAFF324A49D153D6DBC015A47DC49_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_F59FAFF324A49D153D6DBC015A47DC49" 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_F59FAFF324A49D153D6DBC015A47DC49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_F59FAFF324A49D153D6DBC015A47DC49" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_F59FAFF324A49D153D6DBC015A47DC49" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccruedInvestmentIncomeReceivable_DD0A09E3D6C1A35F556CBC015A471188_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedInvestmentIncomeReceivable_DD0A09E3D6C1A35F556CBC015A471188" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivables</link:label>
    <link:label id="lab_us-gaap_AccruedInvestmentIncomeReceivable_DD0A09E3D6C1A35F556CBC015A471188_label_en-US" xlink:label="lab_us-gaap_AccruedInvestmentIncomeReceivable_DD0A09E3D6C1A35F556CBC015A471188" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Investment Income Receivable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedInvestmentIncomeReceivable" xlink:label="loc_us-gaap_AccruedInvestmentIncomeReceivable_DD0A09E3D6C1A35F556CBC015A471188" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccruedInvestmentIncomeReceivable_DD0A09E3D6C1A35F556CBC015A471188" xlink:to="lab_us-gaap_AccruedInvestmentIncomeReceivable_DD0A09E3D6C1A35F556CBC015A471188" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_87DE9C2AEA2899C42193BC015A475CC9_terseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_87DE9C2AEA2899C42193BC015A475CC9" 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_87DE9C2AEA2899C42193BC015A475CC9_label_en-US" xlink:label="lab_us-gaap_Goodwill_87DE9C2AEA2899C42193BC015A475CC9" 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_87DE9C2AEA2899C42193BC015A475CC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_87DE9C2AEA2899C42193BC015A475CC9" xlink:to="lab_us-gaap_Goodwill_87DE9C2AEA2899C42193BC015A475CC9" xlink:type="arc" />
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_9C5D3E09B60A7958A550BC015A477054_terseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_9C5D3E09B60A7958A550BC015A477054" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intangible assets, net</link:label>
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_9C5D3E09B60A7958A550BC015A477054_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_9C5D3E09B60A7958A550BC015A477054" 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_9C5D3E09B60A7958A550BC015A477054" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_9C5D3E09B60A7958A550BC015A477054" xlink:to="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_9C5D3E09B60A7958A550BC015A477054" xlink:type="arc" />
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmount_AF5DF2DE869792D4111EBC015A4808C1_verboseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmount_AF5DF2DE869792D4111EBC015A4808C1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Mortgage servicing rights</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmount_AF5DF2DE869792D4111EBC015A4808C1_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmount_AF5DF2DE869792D4111EBC015A4808C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ServicingAssetAtFairValueAmount" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_AF5DF2DE869792D4111EBC015A4808C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueAmount_AF5DF2DE869792D4111EBC015A4808C1" xlink:to="lab_us-gaap_ServicingAssetAtFairValueAmount_AF5DF2DE869792D4111EBC015A4808C1" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherRealEstateAndForeclosedAssets_9B9225431977D767224FBC015A48A37C_terseLabel_en-US" xlink:label="lab_us-gaap_OtherRealEstateAndForeclosedAssets_9B9225431977D767224FBC015A48A37C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate and other repossessed assets, net of allowance</link:label>
    <link:label id="lab_us-gaap_OtherRealEstateAndForeclosedAssets_9B9225431977D767224FBC015A48A37C_label_en-US" xlink:label="lab_us-gaap_OtherRealEstateAndForeclosedAssets_9B9225431977D767224FBC015A48A37C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Real Estate, Foreclosed Assets, and Repossessed Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherRealEstateAndForeclosedAssets" xlink:label="loc_us-gaap_OtherRealEstateAndForeclosedAssets_9B9225431977D767224FBC015A48A37C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherRealEstateAndForeclosedAssets_9B9225431977D767224FBC015A48A37C" xlink:to="lab_us-gaap_OtherRealEstateAndForeclosedAssets_9B9225431977D767224FBC015A48A37C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeAssets_FB7D9FF7379FA6121A49BC015A4D1C4F_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssets_FB7D9FF7379FA6121A49BC015A4D1C4F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative contracts, net</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_FB7D9FF7379FA6121A49BC015A4D1C4F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssets_FB7D9FF7379FA6121A49BC015A4D1C4F" xlink:to="lab_us-gaap_DerivativeAssets_FB7D9FF7379FA6121A49BC015A4D1C4F" xlink:type="arc" />
    <link:label id="lab_us-gaap_BankOwnedLifeInsurance_394B72032E7D94395698BC015A4DE817_terseLabel_en-US" xlink:label="lab_us-gaap_BankOwnedLifeInsurance_394B72032E7D94395698BC015A4DE817" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash surrender value of bank-owned life insurance</link:label>
    <link:label id="lab_us-gaap_BankOwnedLifeInsurance_394B72032E7D94395698BC015A4DE817_label_en-US" xlink:label="lab_us-gaap_BankOwnedLifeInsurance_394B72032E7D94395698BC015A4DE817" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bank Owned Life Insurance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BankOwnedLifeInsurance" xlink:label="loc_us-gaap_BankOwnedLifeInsurance_394B72032E7D94395698BC015A4DE817" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BankOwnedLifeInsurance_394B72032E7D94395698BC015A4DE817" xlink:to="lab_us-gaap_BankOwnedLifeInsurance_394B72032E7D94395698BC015A4DE817" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations_168467108C0F0ECEBB83BC015A4E8281_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations_168467108C0F0ECEBB83BC015A4E8281" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Receivable on unsettled securities sales</link:label>
    <link:label id="lab_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations_168467108C0F0ECEBB83BC015A4E8281_label_en-US" xlink:label="lab_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations_168467108C0F0ECEBB83BC015A4E8281" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Receivables from Brokers-Dealers and Clearing Organizations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations" xlink:label="loc_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations_168467108C0F0ECEBB83BC015A4E8281" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations_168467108C0F0ECEBB83BC015A4E8281" xlink:to="lab_us-gaap_ReceivablesFromBrokersDealersAndClearingOrganizations_168467108C0F0ECEBB83BC015A4E8281" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAssets_73B0ED52CB32C79B6A47BC015A4EEC54_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherAssets_73B0ED52CB32C79B6A47BC015A4EEC54" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other assets</link:label>
    <link:label id="lab_us-gaap_OtherAssets_73B0ED52CB32C79B6A47BC015A4EEC54_label_en-US" xlink:label="lab_us-gaap_OtherAssets_73B0ED52CB32C79B6A47BC015A4EEC54" 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_73B0ED52CB32C79B6A47BC015A4EEC54" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssets_73B0ED52CB32C79B6A47BC015A4EEC54" xlink:to="lab_us-gaap_OtherAssets_73B0ED52CB32C79B6A47BC015A4EEC54" xlink:type="arc" />
    <link:label id="lab_us-gaap_Assets_27C973396AC235BAAE84BC015A4EC79E_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_27C973396AC235BAAE84BC015A4EC79E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_us-gaap_Assets_27C973396AC235BAAE84BC015A4EC79E_label_en-US" xlink:label="lab_us-gaap_Assets_27C973396AC235BAAE84BC015A4EC79E" 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_27C973396AC235BAAE84BC015A4EC79E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_27C973396AC235BAAE84BC015A4EC79E" xlink:to="lab_us-gaap_Assets_27C973396AC235BAAE84BC015A4EC79E" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_9C0F9B8BAAE833C52613BC015A4F0B87_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_9C0F9B8BAAE833C52613BC015A4F0B87" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_9C0F9B8BAAE833C52613BC015A4F0B87_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_9C0F9B8BAAE833C52613BC015A4F0B87" 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_9C0F9B8BAAE833C52613BC015A4F0B87" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_9C0F9B8BAAE833C52613BC015A4F0B87" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_9C0F9B8BAAE833C52613BC015A4F0B87" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAbstract_389CAEDF9DCEF87EB906BC015A4F4D17_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract_389CAEDF9DCEF87EB906BC015A4F4D17" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liabilities: [Abstract]</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAbstract_389CAEDF9DCEF87EB906BC015A4F4D17_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract_389CAEDF9DCEF87EB906BC015A4F4D17" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAbstract" xlink:label="loc_us-gaap_LiabilitiesAbstract_389CAEDF9DCEF87EB906BC015A4F4D17" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAbstract_389CAEDF9DCEF87EB906BC015A4F4D17" xlink:to="lab_us-gaap_LiabilitiesAbstract_389CAEDF9DCEF87EB906BC015A4F4D17" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepositsAbstract_0D9F1FB34DA038CB19A9BC015A4F1F86_terseLabel_en-US" xlink:label="lab_us-gaap_DepositsAbstract_0D9F1FB34DA038CB19A9BC015A4F1F86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deposits [Abstract]</link:label>
    <link:label id="lab_us-gaap_DepositsAbstract_0D9F1FB34DA038CB19A9BC015A4F1F86_label_en-US" xlink:label="lab_us-gaap_DepositsAbstract_0D9F1FB34DA038CB19A9BC015A4F1F86" 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_0D9F1FB34DA038CB19A9BC015A4F1F86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositsAbstract_0D9F1FB34DA038CB19A9BC015A4F1F86" xlink:to="lab_us-gaap_DepositsAbstract_0D9F1FB34DA038CB19A9BC015A4F1F86" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_58A4C8D90D44A96519E8BC015A4FB085_terseLabel_en-US" xlink:label="lab_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_58A4C8D90D44A96519E8BC015A4FB085" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noninterest-bearing demand deposits</link:label>
    <link:label id="lab_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_58A4C8D90D44A96519E8BC015A4FB085_label_en-US" xlink:label="lab_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_58A4C8D90D44A96519E8BC015A4FB085" 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_58A4C8D90D44A96519E8BC015A4FB085" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_58A4C8D90D44A96519E8BC015A4FB085" xlink:to="lab_us-gaap_NoninterestBearingDepositLiabilitiesDomestic_58A4C8D90D44A96519E8BC015A4FB085" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestBearingDepositLiabilitiesAbstract_BBB5857D7E1DB77F906EBC015A504F4A_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestBearingDepositLiabilitiesAbstract_BBB5857D7E1DB77F906EBC015A504F4A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Interest-bearing deposits: [Abstract]</link:label>
    <link:label id="lab_us-gaap_InterestBearingDepositLiabilitiesAbstract_BBB5857D7E1DB77F906EBC015A504F4A_label_en-US" xlink:label="lab_us-gaap_InterestBearingDepositLiabilitiesAbstract_BBB5857D7E1DB77F906EBC015A504F4A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest-bearing Deposit Liabilities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestBearingDepositLiabilitiesAbstract" xlink:label="loc_us-gaap_InterestBearingDepositLiabilitiesAbstract_BBB5857D7E1DB77F906EBC015A504F4A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestBearingDepositLiabilitiesAbstract_BBB5857D7E1DB77F906EBC015A504F4A" xlink:to="lab_us-gaap_InterestBearingDepositLiabilitiesAbstract_BBB5857D7E1DB77F906EBC015A504F4A" xlink:type="arc" />
    <link:label id="lab_us-gaap_DemandDepositAccounts_73B716ECE23C47DDED96BC015A5000BA_terseLabel_en-US" xlink:label="lab_us-gaap_DemandDepositAccounts_73B716ECE23C47DDED96BC015A5000BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transaction</link:label>
    <link:label id="lab_us-gaap_DemandDepositAccounts_73B716ECE23C47DDED96BC015A5000BA_label_en-US" xlink:label="lab_us-gaap_DemandDepositAccounts_73B716ECE23C47DDED96BC015A5000BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Demand Deposit Accounts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DemandDepositAccounts" xlink:label="loc_us-gaap_DemandDepositAccounts_73B716ECE23C47DDED96BC015A5000BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DemandDepositAccounts_73B716ECE23C47DDED96BC015A5000BA" xlink:to="lab_us-gaap_DemandDepositAccounts_73B716ECE23C47DDED96BC015A5000BA" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepositsSavingsDeposits_ED88C7365B917C8C763EBC015A508FE1_terseLabel_en-US" xlink:label="lab_us-gaap_DepositsSavingsDeposits_ED88C7365B917C8C763EBC015A508FE1" 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_ED88C7365B917C8C763EBC015A508FE1_label_en-US" xlink:label="lab_us-gaap_DepositsSavingsDeposits_ED88C7365B917C8C763EBC015A508FE1" 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_ED88C7365B917C8C763EBC015A508FE1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepositsSavingsDeposits_ED88C7365B917C8C763EBC015A508FE1" xlink:to="lab_us-gaap_DepositsSavingsDeposits_ED88C7365B917C8C763EBC015A508FE1" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDeposits_60834B01EFDB06EC43FEBC015A509BE9_verboseLabel_en-US" xlink:label="lab_us-gaap_TimeDeposits_60834B01EFDB06EC43FEBC015A509BE9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Time</link:label>
    <link:label id="lab_us-gaap_TimeDeposits_60834B01EFDB06EC43FEBC015A509BE9_label_en-US" xlink:label="lab_us-gaap_TimeDeposits_60834B01EFDB06EC43FEBC015A509BE9" 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_60834B01EFDB06EC43FEBC015A509BE9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDeposits_60834B01EFDB06EC43FEBC015A509BE9" xlink:to="lab_us-gaap_TimeDeposits_60834B01EFDB06EC43FEBC015A509BE9" xlink:type="arc" />
    <link:label id="lab_us-gaap_Deposits_6D811CCFC2492419AB97BC015A502A8E_totalLabel_en-US" xlink:label="lab_us-gaap_Deposits_6D811CCFC2492419AB97BC015A502A8E" 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_6D811CCFC2492419AB97BC015A502A8E_label_en-US" xlink:label="lab_us-gaap_Deposits_6D811CCFC2492419AB97BC015A502A8E" 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_6D811CCFC2492419AB97BC015A502A8E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Deposits_6D811CCFC2492419AB97BC015A502A8E" xlink:to="lab_us-gaap_Deposits_6D811CCFC2492419AB97BC015A502A8E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase_0D28879EBBE2EFBBE281BC015A50BEB3_terseLabel_en-US" xlink:label="lab_us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase_0D28879EBBE2EFBBE281BC015A50BEB3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Funds purchased and repurchase agreements</link:label>
    <link:label id="lab_us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase_0D28879EBBE2EFBBE281BC015A50BEB3_label_en-US" xlink:label="lab_us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase_0D28879EBBE2EFBBE281BC015A50BEB3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Funds Purchased and 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_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase" xlink:label="loc_us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase_0D28879EBBE2EFBBE281BC015A50BEB3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase_0D28879EBBE2EFBBE281BC015A50BEB3" xlink:to="lab_us-gaap_FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase_0D28879EBBE2EFBBE281BC015A50BEB3" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherBorrowings_70B4EB3F9A39CF3463E1BC015A516D7B_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherBorrowings_70B4EB3F9A39CF3463E1BC015A516D7B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other borrowings</link:label>
    <link:label id="lab_us-gaap_OtherBorrowings_70B4EB3F9A39CF3463E1BC015A516D7B_label_en-US" xlink:label="lab_us-gaap_OtherBorrowings_70B4EB3F9A39CF3463E1BC015A516D7B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Borrowings</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherBorrowings" xlink:label="loc_us-gaap_OtherBorrowings_70B4EB3F9A39CF3463E1BC015A516D7B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherBorrowings_70B4EB3F9A39CF3463E1BC015A516D7B" xlink:to="lab_us-gaap_OtherBorrowings_70B4EB3F9A39CF3463E1BC015A516D7B" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubordinatedDebt_658C578CAC0CBA500F77BC015A518AA6_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedDebt_658C578CAC0CBA500F77BC015A518AA6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Subordinated debentures</link:label>
    <link:label id="lab_us-gaap_SubordinatedDebt_658C578CAC0CBA500F77BC015A518AA6_label_en-US" xlink:label="lab_us-gaap_SubordinatedDebt_658C578CAC0CBA500F77BC015A518AA6" 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_658C578CAC0CBA500F77BC015A518AA6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedDebt_658C578CAC0CBA500F77BC015A518AA6" xlink:to="lab_us-gaap_SubordinatedDebt_658C578CAC0CBA500F77BC015A518AA6" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_67EFE726E901D9BC1D16BC015A51DC74_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_67EFE726E901D9BC1D16BC015A51DC74" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued interest, taxes and expense</link:label>
    <link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_67EFE726E901D9BC1D16BC015A51DC74_label_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_67EFE726E901D9BC1D16BC015A51DC74" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Payable and Accrued Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_67EFE726E901D9BC1D16BC015A51DC74" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_67EFE726E901D9BC1D16BC015A51DC74" xlink:to="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_67EFE726E901D9BC1D16BC015A51DC74" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeLiabilities_E6C1D74126C53A8FA67FBC015A517C5C_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilities_E6C1D74126C53A8FA67FBC015A517C5C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative contracts, net</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_E6C1D74126C53A8FA67FBC015A517C5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilities_E6C1D74126C53A8FA67FBC015A517C5C" xlink:to="lab_us-gaap_DerivativeLiabilities_E6C1D74126C53A8FA67FBC015A517C5C" xlink:type="arc" />
    <link:label id="lab_us-gaap_PayablesToBrokerDealersAndClearingOrganizations_833E7231635117391619BC015A51980E_terseLabel_en-US" xlink:label="lab_us-gaap_PayablesToBrokerDealersAndClearingOrganizations_833E7231635117391619BC015A51980E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Due on unsettled securities purchases</link:label>
    <link:label id="lab_us-gaap_PayablesToBrokerDealersAndClearingOrganizations_833E7231635117391619BC015A51980E_label_en-US" xlink:label="lab_us-gaap_PayablesToBrokerDealersAndClearingOrganizations_833E7231635117391619BC015A51980E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payables to Broker-Dealers and Clearing Organizations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PayablesToBrokerDealersAndClearingOrganizations" xlink:label="loc_us-gaap_PayablesToBrokerDealersAndClearingOrganizations_833E7231635117391619BC015A51980E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PayablesToBrokerDealersAndClearingOrganizations_833E7231635117391619BC015A51980E" xlink:to="lab_us-gaap_PayablesToBrokerDealersAndClearingOrganizations_833E7231635117391619BC015A51980E" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherLiabilities_E82F8D57979261C73D91BC015A51C1B3_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilities_E82F8D57979261C73D91BC015A51C1B3" 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_E82F8D57979261C73D91BC015A51C1B3_label_en-US" xlink:label="lab_us-gaap_OtherLiabilities_E82F8D57979261C73D91BC015A51C1B3" 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_E82F8D57979261C73D91BC015A51C1B3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilities_E82F8D57979261C73D91BC015A51C1B3" xlink:to="lab_us-gaap_OtherLiabilities_E82F8D57979261C73D91BC015A51C1B3" xlink:type="arc" />
    <link:label id="lab_us-gaap_Liabilities_98E5FA51BB04BC842266BC015A526557_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities_98E5FA51BB04BC842266BC015A526557" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_us-gaap_Liabilities_98E5FA51BB04BC842266BC015A526557_label_en-US" xlink:label="lab_us-gaap_Liabilities_98E5FA51BB04BC842266BC015A526557" 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_98E5FA51BB04BC842266BC015A526557" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities_98E5FA51BB04BC842266BC015A526557" xlink:to="lab_us-gaap_Liabilities_98E5FA51BB04BC842266BC015A526557" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_F0480DD0CDC1F26757B4BC015A52E177_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_F0480DD0CDC1F26757B4BC015A52E177" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shareholders' equity: [Abstract]</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_F0480DD0CDC1F26757B4BC015A52E177_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_F0480DD0CDC1F26757B4BC015A52E177" 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_F0480DD0CDC1F26757B4BC015A52E177" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityAbstract_F0480DD0CDC1F26757B4BC015A52E177" xlink:to="lab_us-gaap_StockholdersEquityAbstract_F0480DD0CDC1F26757B4BC015A52E177" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockValue_0CD2FD46E3574EF245ECBC015A527050_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue_0CD2FD46E3574EF245ECBC015A527050" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock</link:label>
    <link:label id="lab_us-gaap_CommonStockValue_0CD2FD46E3574EF245ECBC015A527050_label_en-US" xlink:label="lab_us-gaap_CommonStockValue_0CD2FD46E3574EF245ECBC015A527050" 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_0CD2FD46E3574EF245ECBC015A527050" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockValue_0CD2FD46E3574EF245ECBC015A527050" xlink:to="lab_us-gaap_CommonStockValue_0CD2FD46E3574EF245ECBC015A527050" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_208117F93BB0C99DD147BC015A522D93_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_208117F93BB0C99DD147BC015A522D93" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital surplus</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_208117F93BB0C99DD147BC015A522D93_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_208117F93BB0C99DD147BC015A522D93" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid in Capital, Common Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_208117F93BB0C99DD147BC015A522D93" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalCommonStock_208117F93BB0C99DD147BC015A522D93" xlink:to="lab_us-gaap_AdditionalPaidInCapitalCommonStock_208117F93BB0C99DD147BC015A522D93" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_1209F1C1B5686F9D3F65BC015A52BD6F_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_1209F1C1B5686F9D3F65BC015A52BD6F" 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_1209F1C1B5686F9D3F65BC015A52BD6F_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_1209F1C1B5686F9D3F65BC015A52BD6F" 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_1209F1C1B5686F9D3F65BC015A52BD6F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsAccumulatedDeficit_1209F1C1B5686F9D3F65BC015A52BD6F" xlink:to="lab_us-gaap_RetainedEarningsAccumulatedDeficit_1209F1C1B5686F9D3F65BC015A52BD6F" xlink:type="arc" />
    <link:label id="lab_us-gaap_TreasuryStockValue_60E38D44A44FC197FE56BC015A526DF9_negatedLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockValue_60E38D44A44FC197FE56BC015A526DF9" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Treasury stock</link:label>
    <link:label id="lab_us-gaap_TreasuryStockValue_60E38D44A44FC197FE56BC015A526DF9_label_en-US" xlink:label="lab_us-gaap_TreasuryStockValue_60E38D44A44FC197FE56BC015A526DF9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock, Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_us-gaap_TreasuryStockValue_60E38D44A44FC197FE56BC015A526DF9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockValue_60E38D44A44FC197FE56BC015A526DF9" xlink:to="lab_us-gaap_TreasuryStockValue_60E38D44A44FC197FE56BC015A526DF9" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_97089A4679EC2DE2B5D1BC015A53010F_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_97089A4679EC2DE2B5D1BC015A53010F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated other comprehensive gain (loss)</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_97089A4679EC2DE2B5D1BC015A53010F_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_97089A4679EC2DE2B5D1BC015A53010F" 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_97089A4679EC2DE2B5D1BC015A53010F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_97089A4679EC2DE2B5D1BC015A53010F" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_97089A4679EC2DE2B5D1BC015A53010F" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquity_CAF792F94DACE334AC3DBC015A53FED5_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_CAF792F94DACE334AC3DBC015A53FED5" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total shareholders&#8217; equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_CAF792F94DACE334AC3DBC015A53FED5_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity_CAF792F94DACE334AC3DBC015A53FED5" 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_CAF792F94DACE334AC3DBC015A53FED5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquity_CAF792F94DACE334AC3DBC015A53FED5" xlink:to="lab_us-gaap_StockholdersEquity_CAF792F94DACE334AC3DBC015A53FED5" xlink:type="arc" />
    <link:label id="lab_us-gaap_MinorityInterest_A351921A34C5D13F84E3BC015A53A61F_terseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterest_A351921A34C5D13F84E3BC015A53A61F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-controlling interests</link:label>
    <link:label id="lab_us-gaap_MinorityInterest_A351921A34C5D13F84E3BC015A53A61F_label_en-US" xlink:label="lab_us-gaap_MinorityInterest_A351921A34C5D13F84E3BC015A53A61F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaap_MinorityInterest_A351921A34C5D13F84E3BC015A53A61F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterest_A351921A34C5D13F84E3BC015A53A61F" xlink:to="lab_us-gaap_MinorityInterest_A351921A34C5D13F84E3BC015A53A61F" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A23616B0482EAF7D08AABC015A534484_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A23616B0482EAF7D08AABC015A534484" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A23616B0482EAF7D08AABC015A534484_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A23616B0482EAF7D08AABC015A534484" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A23616B0482EAF7D08AABC015A534484" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A23616B0482EAF7D08AABC015A534484" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_A23616B0482EAF7D08AABC015A534484" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_BFED4BB9A0DE39D9D2B1BC015A532F8B_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_BFED4BB9A0DE39D9D2B1BC015A532F8B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total liabilities and equity</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquity_BFED4BB9A0DE39D9D2B1BC015A532F8B_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquity_BFED4BB9A0DE39D9D2B1BC015A532F8B" 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_BFED4BB9A0DE39D9D2B1BC015A532F8B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_BFED4BB9A0DE39D9D2B1BC015A532F8B" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquity_BFED4BB9A0DE39D9D2B1BC015A532F8B" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingAbstract_997CE5D50FC5DBEF41D6D47EA6D21EA6_label_en-US" xlink:label="lab_us-gaap_SegmentReportingAbstract_997CE5D50FC5DBEF41D6D47EA6D21EA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_997CE5D50FC5DBEF41D6D47EA6D21EA6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingAbstract_997CE5D50FC5DBEF41D6D47EA6D21EA6" xlink:to="lab_us-gaap_SegmentReportingAbstract_997CE5D50FC5DBEF41D6D47EA6D21EA6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_18CFC2D4D389C62FF800D47EA6D2D1F6_terseLabel_en-US" xlink:label="lab_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_18CFC2D4D389C62FF800D47EA6D2D1F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments Reporting Information [Table]</link:label>
    <link:label id="lab_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_18CFC2D4D389C62FF800D47EA6D2D1F6_label_en-US" xlink:label="lab_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_18CFC2D4D389C62FF800D47EA6D2D1F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reconciliation of Revenue from Segments to Consolidated [Table]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_18CFC2D4D389C62FF800D47EA6D2D1F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_18CFC2D4D389C62FF800D47EA6D2D1F6" xlink:to="lab_us-gaap_ReconciliationOfRevenueFromSegmentsToConsolidatedTable_18CFC2D4D389C62FF800D47EA6D2D1F6" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_F80B6935F735E0171996D47EA6D41D8D_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_F80B6935F735E0171996D47EA6D41D8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment Reporting Information [Line Items]</link:label>
    <link:label id="lab_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_F80B6935F735E0171996D47EA6D41D8D_label_en-US" xlink:label="lab_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_F80B6935F735E0171996D47EA6D41D8D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting, Revenue Reconciling Item [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentReportingRevenueReconcilingItemLineItems" xlink:label="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_F80B6935F735E0171996D47EA6D41D8D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_F80B6935F735E0171996D47EA6D41D8D" xlink:to="lab_us-gaap_SegmentReportingRevenueReconcilingItemLineItems_F80B6935F735E0171996D47EA6D41D8D" xlink:type="arc" />
    <link:label id="lab_bokf_NirExpenseFromExternalSources_DC26629BAD8FE5F9104DD47EA6D498AF_terseLabel_en-US" xlink:label="lab_bokf_NirExpenseFromExternalSources_DC26629BAD8FE5F9104DD47EA6D498AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net interest revenue from external sources</link:label>
    <link:label id="lab_bokf_NirExpenseFromExternalSources_DC26629BAD8FE5F9104DD47EA6D498AF_label_en-US" xlink:label="lab_bokf_NirExpenseFromExternalSources_DC26629BAD8FE5F9104DD47EA6D498AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NIR (expense) from external sources</link:label>
    <link:label id="lab_bokf_NirExpenseFromExternalSources_DC26629BAD8FE5F9104DD47EA6D498AF_documentation_en-US" xlink:label="lab_bokf_NirExpenseFromExternalSources_DC26629BAD8FE5F9104DD47EA6D498AF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of interest revenue, primarily from loans and securities net of interest expense (cost of borrowed funds accounted for as interest) from external sources.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NirExpenseFromExternalSources" xlink:label="loc_bokf_NirExpenseFromExternalSources_DC26629BAD8FE5F9104DD47EA6D498AF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NirExpenseFromExternalSources_DC26629BAD8FE5F9104DD47EA6D498AF" xlink:to="lab_bokf_NirExpenseFromExternalSources_DC26629BAD8FE5F9104DD47EA6D498AF" xlink:type="arc" />
    <link:label id="lab_bokf_NIRexpensefrominternalsources_979127C3A22DCF8A51B4D47EA6D4D8DC_terseLabel_en-US" xlink:label="lab_bokf_NIRexpensefrominternalsources_979127C3A22DCF8A51B4D47EA6D4D8DC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net interest revenue (expense) from internal sources</link:label>
    <link:label id="lab_bokf_NIRexpensefrominternalsources_979127C3A22DCF8A51B4D47EA6D4D8DC_label_en-US" xlink:label="lab_bokf_NIRexpensefrominternalsources_979127C3A22DCF8A51B4D47EA6D4D8DC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NIR (expense) from internal sources</link:label>
    <link:label id="lab_bokf_NIRexpensefrominternalsources_979127C3A22DCF8A51B4D47EA6D4D8DC_documentation_en-US" xlink:label="lab_bokf_NIRexpensefrominternalsources_979127C3A22DCF8A51B4D47EA6D4D8DC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of interest revenue earned or paid on funds loaned to or borrowed from the funds management unit net of interest expense (cost of borrowed funds accounted for as interest) from internal sources.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NIRexpensefrominternalsources" xlink:label="loc_bokf_NIRexpensefrominternalsources_979127C3A22DCF8A51B4D47EA6D4D8DC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NIRexpensefrominternalsources_979127C3A22DCF8A51B4D47EA6D4D8DC" xlink:to="lab_bokf_NIRexpensefrominternalsources_979127C3A22DCF8A51B4D47EA6D4D8DC" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeExpenseNet_4A03D82E44F72B36E8B6D47EA6D53BE2_totalLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNet_4A03D82E44F72B36E8B6D47EA6D53BE2" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net interest revenue</link:label>
    <link:label id="lab_us-gaap_InterestIncomeExpenseNet_4A03D82E44F72B36E8B6D47EA6D53BE2_label_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNet_4A03D82E44F72B36E8B6D47EA6D53BE2" 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_4A03D82E44F72B36E8B6D47EA6D53BE2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_4A03D82E44F72B36E8B6D47EA6D53BE2" xlink:to="lab_us-gaap_InterestIncomeExpenseNet_4A03D82E44F72B36E8B6D47EA6D53BE2" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProvisionForLoanLeaseAndOtherLosses_D3663F7353FC8FABB2FED47EA6D50AA7_terseLabel_en-US" xlink:label="lab_us-gaap_ProvisionForLoanLeaseAndOtherLosses_D3663F7353FC8FABB2FED47EA6D50AA7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provision for credit losses</link:label>
    <link:label id="lab_us-gaap_ProvisionForLoanLeaseAndOtherLosses_D3663F7353FC8FABB2FED47EA6D50AA7_label_en-US" xlink:label="lab_us-gaap_ProvisionForLoanLeaseAndOtherLosses_D3663F7353FC8FABB2FED47EA6D50AA7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Provision for Loan, Lease, and Other Losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_D3663F7353FC8FABB2FED47EA6D50AA7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_D3663F7353FC8FABB2FED47EA6D50AA7" xlink:to="lab_us-gaap_ProvisionForLoanLeaseAndOtherLosses_D3663F7353FC8FABB2FED47EA6D50AA7" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_B670F73756D4C5C1387BD47EA6D5355C_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_B670F73756D4C5C1387BD47EA6D5355C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net interest revenue after provision for credit losses</link:label>
    <link:label id="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_B670F73756D4C5C1387BD47EA6D5355C_label_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_B670F73756D4C5C1387BD47EA6D5355C" 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_B670F73756D4C5C1387BD47EA6D5355C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_B670F73756D4C5C1387BD47EA6D5355C" xlink:to="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_B670F73756D4C5C1387BD47EA6D5355C" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestIncome_D59839667011522C034AD47EA6D58F1A_verboseLabel_en-US" xlink:label="lab_us-gaap_NoninterestIncome_D59839667011522C034AD47EA6D58F1A" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other operating revenue</link:label>
    <link:label id="lab_us-gaap_NoninterestIncome_D59839667011522C034AD47EA6D58F1A_label_en-US" xlink:label="lab_us-gaap_NoninterestIncome_D59839667011522C034AD47EA6D58F1A" 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_D59839667011522C034AD47EA6D58F1A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestIncome_D59839667011522C034AD47EA6D58F1A" xlink:to="lab_us-gaap_NoninterestIncome_D59839667011522C034AD47EA6D58F1A" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestExpense_885C7B9B3C60BE3877E4D47EA6D5DD83_verboseLabel_en-US" xlink:label="lab_us-gaap_NoninterestExpense_885C7B9B3C60BE3877E4D47EA6D5DD83" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other operating expense</link:label>
    <link:label id="lab_us-gaap_NoninterestExpense_885C7B9B3C60BE3877E4D47EA6D5DD83_label_en-US" xlink:label="lab_us-gaap_NoninterestExpense_885C7B9B3C60BE3877E4D47EA6D5DD83" 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_885C7B9B3C60BE3877E4D47EA6D5DD83" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestExpense_885C7B9B3C60BE3877E4D47EA6D5DD83" xlink:to="lab_us-gaap_NoninterestExpense_885C7B9B3C60BE3877E4D47EA6D5DD83" xlink:type="arc" />
    <link:label id="lab_bokf_Netdirectcontribution_B7E3800E64DBC9D9B6C3D47EA6D53182_totalLabel_en-US" xlink:label="lab_bokf_Netdirectcontribution_B7E3800E64DBC9D9B6C3D47EA6D53182" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net direct contribution</link:label>
    <link:label id="lab_bokf_Netdirectcontribution_B7E3800E64DBC9D9B6C3D47EA6D53182_label_en-US" xlink:label="lab_bokf_Netdirectcontribution_B7E3800E64DBC9D9B6C3D47EA6D53182" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net direct contribution</link:label>
    <link:label id="lab_bokf_Netdirectcontribution_B7E3800E64DBC9D9B6C3D47EA6D53182_documentation_en-US" xlink:label="lab_bokf_Netdirectcontribution_B7E3800E64DBC9D9B6C3D47EA6D53182" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents net direct contribution of segments prior to corporate expense allocations.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Netdirectcontribution" xlink:label="loc_bokf_Netdirectcontribution_B7E3800E64DBC9D9B6C3D47EA6D53182" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Netdirectcontribution_B7E3800E64DBC9D9B6C3D47EA6D53182" xlink:to="lab_bokf_Netdirectcontribution_B7E3800E64DBC9D9B6C3D47EA6D53182" xlink:type="arc" />
    <link:label id="lab_bokf_GainLossonFinancialInstrumentsNet_E3AC045AE8BFCE5D0C04D47EA6D591F6_terseLabel_en-US" xlink:label="lab_bokf_GainLossonFinancialInstrumentsNet_E3AC045AE8BFCE5D0C04D47EA6D591F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (loss) on financial instruments, net</link:label>
    <link:label id="lab_bokf_GainLossonFinancialInstrumentsNet_E3AC045AE8BFCE5D0C04D47EA6D591F6_label_en-US" xlink:label="lab_bokf_GainLossonFinancialInstrumentsNet_E3AC045AE8BFCE5D0C04D47EA6D591F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Financial Instruments, Net</link:label>
    <link:label id="lab_bokf_GainLossonFinancialInstrumentsNet_E3AC045AE8BFCE5D0C04D47EA6D591F6_documentation_en-US" xlink:label="lab_bokf_GainLossonFinancialInstrumentsNet_E3AC045AE8BFCE5D0C04D47EA6D591F6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents gain (loss) on financial instruments, net, used for segment reporting purposes on a summary basis. Includes those gains and losses from derivative contracts, fair value option securities and available for sale securities. Also includes in other-than-temporary impairment losses recognized in earnings.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_GainLossonFinancialInstrumentsNet" xlink:label="loc_bokf_GainLossonFinancialInstrumentsNet_E3AC045AE8BFCE5D0C04D47EA6D591F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_GainLossonFinancialInstrumentsNet_E3AC045AE8BFCE5D0C04D47EA6D591F6" xlink:to="lab_bokf_GainLossonFinancialInstrumentsNet_E3AC045AE8BFCE5D0C04D47EA6D591F6" xlink:type="arc" />
    <link:label id="lab_bokf_SegmentReportingChangeinFairValueofMortgageServicingRights_6C76B5CB00C8CBC8A012D47EA6D6791C_terseLabel_en-US" xlink:label="lab_bokf_SegmentReportingChangeinFairValueofMortgageServicingRights_6C76B5CB00C8CBC8A012D47EA6D6791C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value of mortgage servicing rights</link:label>
    <link:label id="lab_bokf_SegmentReportingChangeinFairValueofMortgageServicingRights_6C76B5CB00C8CBC8A012D47EA6D6791C_label_en-US" xlink:label="lab_bokf_SegmentReportingChangeinFairValueofMortgageServicingRights_6C76B5CB00C8CBC8A012D47EA6D6791C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting, Change in Fair Value of Mortgage Servicing Rights</link:label>
    <link:label id="lab_bokf_SegmentReportingChangeinFairValueofMortgageServicingRights_6C76B5CB00C8CBC8A012D47EA6D6791C_documentation_en-US" xlink:label="lab_bokf_SegmentReportingChangeinFairValueofMortgageServicingRights_6C76B5CB00C8CBC8A012D47EA6D6791C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the change in the fair value of mortgage servicing rights used for segment reporting purposes.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_SegmentReportingChangeinFairValueofMortgageServicingRights" xlink:label="loc_bokf_SegmentReportingChangeinFairValueofMortgageServicingRights_6C76B5CB00C8CBC8A012D47EA6D6791C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_SegmentReportingChangeinFairValueofMortgageServicingRights_6C76B5CB00C8CBC8A012D47EA6D6791C" xlink:to="lab_bokf_SegmentReportingChangeinFairValueofMortgageServicingRights_6C76B5CB00C8CBC8A012D47EA6D6791C" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_D5FC9CFA6970EABBF3E9D47EA6D63958_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_D5FC9CFA6970EABBF3E9D47EA6D63958" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (loss) on repossessed assets, net</link:label>
    <link:label id="lab_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_D5FC9CFA6970EABBF3E9D47EA6D63958_label_en-US" xlink:label="lab_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_D5FC9CFA6970EABBF3E9D47EA6D63958" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Sale of Assets and Asset Impairment Charges</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges" xlink:label="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_D5FC9CFA6970EABBF3E9D47EA6D63958" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_D5FC9CFA6970EABBF3E9D47EA6D63958" xlink:to="lab_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_D5FC9CFA6970EABBF3E9D47EA6D63958" xlink:type="arc" />
    <link:label id="lab_bokf_CorporateExpenseAllocations_5E6B3859CC667DEE2E06D47EA6D67CD6_terseLabel_en-US" xlink:label="lab_bokf_CorporateExpenseAllocations_5E6B3859CC667DEE2E06D47EA6D67CD6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Corporate expense allocations</link:label>
    <link:label id="lab_bokf_CorporateExpenseAllocations_5E6B3859CC667DEE2E06D47EA6D67CD6_label_en-US" xlink:label="lab_bokf_CorporateExpenseAllocations_5E6B3859CC667DEE2E06D47EA6D67CD6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Corporate Expense Allocations</link:label>
    <link:label id="lab_bokf_CorporateExpenseAllocations_5E6B3859CC667DEE2E06D47EA6D67CD6_documentation_en-US" xlink:label="lab_bokf_CorporateExpenseAllocations_5E6B3859CC667DEE2E06D47EA6D67CD6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represent allocation of corporate expenses to segments</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CorporateExpenseAllocations" xlink:label="loc_bokf_CorporateExpenseAllocations_5E6B3859CC667DEE2E06D47EA6D67CD6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CorporateExpenseAllocations_5E6B3859CC667DEE2E06D47EA6D67CD6" xlink:to="lab_bokf_CorporateExpenseAllocations_5E6B3859CC667DEE2E06D47EA6D67CD6" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_2EC9E14019EF277F7A00D47EA6D627A3_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_2EC9E14019EF277F7A00D47EA6D627A3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net income before taxes</link:label>
    <link:label id="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_2EC9E14019EF277F7A00D47EA6D627A3_label_en-US" xlink:label="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_2EC9E14019EF277F7A00D47EA6D627A3" 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_2EC9E14019EF277F7A00D47EA6D627A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_2EC9E14019EF277F7A00D47EA6D627A3" xlink:to="lab_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_2EC9E14019EF277F7A00D47EA6D627A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_4CB049B635CFC1F79747D47EA6D6EB04_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_4CB049B635CFC1F79747D47EA6D6EB04" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal and state income taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_4CB049B635CFC1F79747D47EA6D6EB04_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_4CB049B635CFC1F79747D47EA6D6EB04" 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_4CB049B635CFC1F79747D47EA6D6EB04" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_4CB049B635CFC1F79747D47EA6D6EB04" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_4CB049B635CFC1F79747D47EA6D6EB04" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProfitLoss_D055281B07D7F31F89C3D47EA6D77AB0_terseLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss_D055281B07D7F31F89C3D47EA6D77AB0" 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_ProfitLoss_D055281B07D7F31F89C3D47EA6D77AB0_label_en-US" xlink:label="lab_us-gaap_ProfitLoss_D055281B07D7F31F89C3D47EA6D77AB0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_D055281B07D7F31F89C3D47EA6D77AB0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfitLoss_D055281B07D7F31F89C3D47EA6D77AB0" xlink:to="lab_us-gaap_ProfitLoss_D055281B07D7F31F89C3D47EA6D77AB0" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_326DC51167D59E456318D47EA6D75A2B_terseLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_326DC51167D59E456318D47EA6D75A2B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income attributable to non-controlling interests</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_326DC51167D59E456318D47EA6D75A2B_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_326DC51167D59E456318D47EA6D75A2B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_326DC51167D59E456318D47EA6D75A2B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_326DC51167D59E456318D47EA6D75A2B" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_326DC51167D59E456318D47EA6D75A2B" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLoss_1987A3CC1391D4F30EFFD47EA6D7AE13_verboseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_1987A3CC1391D4F30EFFD47EA6D7AE13" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net income attributable to BOK Financial Corp. shareholders</link:label>
    <link:label id="lab_us-gaap_NetIncomeLoss_1987A3CC1391D4F30EFFD47EA6D7AE13_label_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_1987A3CC1391D4F30EFFD47EA6D7AE13" 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_1987A3CC1391D4F30EFFD47EA6D7AE13" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_1987A3CC1391D4F30EFFD47EA6D7AE13" xlink:to="lab_us-gaap_NetIncomeLoss_1987A3CC1391D4F30EFFD47EA6D7AE13" xlink:type="arc" />
    <link:label id="lab_bokf_AverageAssetsForReportingPeriod_325466377BAC161DBE6BD47EA6D7629F_terseLabel_en-US" xlink:label="lab_bokf_AverageAssetsForReportingPeriod_325466377BAC161DBE6BD47EA6D7629F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average assets</link:label>
    <link:label id="lab_bokf_AverageAssetsForReportingPeriod_325466377BAC161DBE6BD47EA6D7629F_label_en-US" xlink:label="lab_bokf_AverageAssetsForReportingPeriod_325466377BAC161DBE6BD47EA6D7629F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Average Assets for Reporting Period</link:label>
    <link:label id="lab_bokf_AverageAssetsForReportingPeriod_325466377BAC161DBE6BD47EA6D7629F_documentation_en-US" xlink:label="lab_bokf_AverageAssetsForReportingPeriod_325466377BAC161DBE6BD47EA6D7629F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of average assets attributed to the reportable segment for the reporting period.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_AverageAssetsForReportingPeriod" xlink:label="loc_bokf_AverageAssetsForReportingPeriod_325466377BAC161DBE6BD47EA6D7629F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_AverageAssetsForReportingPeriod_325466377BAC161DBE6BD47EA6D7629F" xlink:to="lab_bokf_AverageAssetsForReportingPeriod_325466377BAC161DBE6BD47EA6D7629F" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxDisclosureAbstract_098A056098C365B40563D47EA8A34C4C_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureAbstract_098A056098C365B40563D47EA8A34C4C" 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_098A056098C365B40563D47EA8A34C4C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_098A056098C365B40563D47EA8A34C4C" xlink:to="lab_us-gaap_IncomeTaxDisclosureAbstract_098A056098C365B40563D47EA8A34C4C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_F58F6961A6765206EB81D47EA8A3FD2D_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_F58F6961A6765206EB81D47EA8A3FD2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_F58F6961A6765206EB81D47EA8A3FD2D_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_F58F6961A6765206EB81D47EA8A3FD2D" 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_F58F6961A6765206EB81D47EA8A3FD2D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_F58F6961A6765206EB81D47EA8A3FD2D" xlink:to="lab_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_F58F6961A6765206EB81D47EA8A3FD2D" xlink:type="arc" />
    <link:label id="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_E06B0E6C336AEC0A32D7D47EA83150E4_label_en-US" xlink:label="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_E06B0E6C336AEC0A32D7D47EA83150E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_E06B0E6C336AEC0A32D7D47EA83150E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_E06B0E6C336AEC0A32D7D47EA83150E4" xlink:to="lab_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_E06B0E6C336AEC0A32D7D47EA83150E4" xlink:type="arc" />
    <link:label id="lab_bokf_Increaseofreportedrightofuseassetsandliabilities_8ED86F044B1C3A96A5D6D47EA831ED1D_terseLabel_en-US" xlink:label="lab_bokf_Increaseofreportedrightofuseassetsandliabilities_8ED86F044B1C3A96A5D6D47EA831ED1D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase of reported right of use assets and liabilities, minimum</link:label>
    <link:label id="lab_bokf_Increaseofreportedrightofuseassetsandliabilities_8ED86F044B1C3A96A5D6D47EA831ED1D_label_en-US" xlink:label="lab_bokf_Increaseofreportedrightofuseassetsandliabilities_8ED86F044B1C3A96A5D6D47EA831ED1D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase of reported right of use assets and liabilities</link:label>
    <link:label id="lab_bokf_Increaseofreportedrightofuseassetsandliabilities_8ED86F044B1C3A96A5D6D47EA831ED1D_documentation_en-US" xlink:label="lab_bokf_Increaseofreportedrightofuseassetsandliabilities_8ED86F044B1C3A96A5D6D47EA831ED1D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase of reported right of use assets and liabilities minimum</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Increaseofreportedrightofuseassetsandliabilities" xlink:label="loc_bokf_Increaseofreportedrightofuseassetsandliabilities_8ED86F044B1C3A96A5D6D47EA831ED1D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Increaseofreportedrightofuseassetsandliabilities_8ED86F044B1C3A96A5D6D47EA831ED1D" xlink:to="lab_bokf_Increaseofreportedrightofuseassetsandliabilities_8ED86F044B1C3A96A5D6D47EA831ED1D" xlink:type="arc" />
    <link:label id="lab_bokf_Increaseofreportedrightofuseassetsandliabilitiesmaximum_B074B7782619CE7C129BD47EA8313380_terseLabel_en-US" xlink:label="lab_bokf_Increaseofreportedrightofuseassetsandliabilitiesmaximum_B074B7782619CE7C129BD47EA8313380" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Increase of reported right of use assets and liabilities maximum</link:label>
    <link:label id="lab_bokf_Increaseofreportedrightofuseassetsandliabilitiesmaximum_B074B7782619CE7C129BD47EA8313380_label_en-US" xlink:label="lab_bokf_Increaseofreportedrightofuseassetsandliabilitiesmaximum_B074B7782619CE7C129BD47EA8313380" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase of reported right of use assets and liabilities maximum</link:label>
    <link:label id="lab_bokf_Increaseofreportedrightofuseassetsandliabilitiesmaximum_B074B7782619CE7C129BD47EA8313380_documentation_en-US" xlink:label="lab_bokf_Increaseofreportedrightofuseassetsandliabilitiesmaximum_B074B7782619CE7C129BD47EA8313380" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Increase of reported right of use assets and liabilities maximum</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Increaseofreportedrightofuseassetsandliabilitiesmaximum" xlink:label="loc_bokf_Increaseofreportedrightofuseassetsandliabilitiesmaximum_B074B7782619CE7C129BD47EA8313380" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Increaseofreportedrightofuseassetsandliabilitiesmaximum_B074B7782619CE7C129BD47EA8313380" xlink:to="lab_bokf_Increaseofreportedrightofuseassetsandliabilitiesmaximum_B074B7782619CE7C129BD47EA8313380" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_39DDF86C8BE96A2F787FD47EA71192B5_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock_39DDF86C8BE96A2F787FD47EA71192B5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Measurements [Text Block]</link:label>
    <link:label id="lab_us-gaap_FairValueDisclosuresTextBlock_39DDF86C8BE96A2F787FD47EA71192B5_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosuresTextBlock_39DDF86C8BE96A2F787FD47EA71192B5" 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_39DDF86C8BE96A2F787FD47EA71192B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosuresTextBlock_39DDF86C8BE96A2F787FD47EA71192B5" xlink:to="lab_us-gaap_FairValueDisclosuresTextBlock_39DDF86C8BE96A2F787FD47EA71192B5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_124F9D50BC806D5028CFD47EA756CE9C_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_124F9D50BC806D5028CFD47EA756CE9C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Variable Interest Entities [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_124F9D50BC806D5028CFD47EA756CE9C_label_en-US" xlink:label="lab_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_124F9D50BC806D5028CFD47EA756CE9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Variable Interest Entities [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_ScheduleOfVariableInterestEntitiesTextBlock" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_124F9D50BC806D5028CFD47EA756CE9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_124F9D50BC806D5028CFD47EA756CE9C" xlink:to="lab_us-gaap_ScheduleOfVariableInterestEntitiesTextBlock_124F9D50BC806D5028CFD47EA756CE9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_D22E2A07F0EB50BD7C13D47EA8A33EA4_label_en-US" xlink:label="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_D22E2A07F0EB50BD7C13D47EA8A33EA4" 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_D22E2A07F0EB50BD7C13D47EA8A33EA4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_D22E2A07F0EB50BD7C13D47EA8A33EA4" xlink:to="lab_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_D22E2A07F0EB50BD7C13D47EA8A33EA4" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_B9F69A76CDAB516DB5B7D47EA8A32036_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_B9F69A76CDAB516DB5B7D47EA8A32036" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss) before income taxes:</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_B9F69A76CDAB516DB5B7D47EA8A32036_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_B9F69A76CDAB516DB5B7D47EA8A32036" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), before Tax [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_B9F69A76CDAB516DB5B7D47EA8A32036" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_B9F69A76CDAB516DB5B7D47EA8A32036" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract_B9F69A76CDAB516DB5B7D47EA8A32036" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_07C6E16E5A2BBF4AF871D47EA8A34907_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_07C6E16E5A2BBF4AF871D47EA8A34907" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in unrealized gain (loss)</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_07C6E16E5A2BBF4AF871D47EA8A34907_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_07C6E16E5A2BBF4AF871D47EA8A34907" 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, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_07C6E16E5A2BBF4AF871D47EA8A34907" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_07C6E16E5A2BBF4AF871D47EA8A34907" xlink:to="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_07C6E16E5A2BBF4AF871D47EA8A34907" xlink:type="arc" />
    <link:label id="lab_bokf_ReclassificationAdjustmentsIncludedInEarningsAbstract_F3E07D91359B9F313144D47EA8A37CDA_terseLabel_en-US" xlink:label="lab_bokf_ReclassificationAdjustmentsIncludedInEarningsAbstract_F3E07D91359B9F313144D47EA8A37CDA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification adjustments included in earnings:</link:label>
    <link:label id="lab_bokf_ReclassificationAdjustmentsIncludedInEarningsAbstract_F3E07D91359B9F313144D47EA8A37CDA_label_en-US" xlink:label="lab_bokf_ReclassificationAdjustmentsIncludedInEarningsAbstract_F3E07D91359B9F313144D47EA8A37CDA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification Adjustments Included in Earnings [Abstract]</link:label>
    <link:label id="lab_bokf_ReclassificationAdjustmentsIncludedInEarningsAbstract_F3E07D91359B9F313144D47EA8A37CDA_documentation_en-US" xlink:label="lab_bokf_ReclassificationAdjustmentsIncludedInEarningsAbstract_F3E07D91359B9F313144D47EA8A37CDA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reclassification Adjustments Included in Earnings [Abstract]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ReclassificationAdjustmentsIncludedInEarningsAbstract" xlink:label="loc_bokf_ReclassificationAdjustmentsIncludedInEarningsAbstract_F3E07D91359B9F313144D47EA8A37CDA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ReclassificationAdjustmentsIncludedInEarningsAbstract_F3E07D91359B9F313144D47EA8A37CDA" xlink:to="lab_bokf_ReclassificationAdjustmentsIncludedInEarningsAbstract_F3E07D91359B9F313144D47EA8A37CDA" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_0AEBA2572D68A334789AD47EA8A39B59_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_0AEBA2572D68A334789AD47EA8A39B59" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Loss (gain) on available for sale securities, net</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_0AEBA2572D68A334789AD47EA8A39B59_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_0AEBA2572D68A334789AD47EA8A39B59" 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, before Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_0AEBA2572D68A334789AD47EA8A39B59" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_0AEBA2572D68A334789AD47EA8A39B59" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_0AEBA2572D68A334789AD47EA8A39B59" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_A794A2EC1AC2CF0C223DD47EA8A3F91B_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_A794A2EC1AC2CF0C223DD47EA8A3F91B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss) before income taxes</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_A794A2EC1AC2CF0C223DD47EA8A3F91B_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_A794A2EC1AC2CF0C223DD47EA8A3F91B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (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_OtherComprehensiveIncomeLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_A794A2EC1AC2CF0C223DD47EA8A3F91B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_A794A2EC1AC2CF0C223DD47EA8A3F91B" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_A794A2EC1AC2CF0C223DD47EA8A3F91B" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossTax_2A26EE322610472955ACD47EA8A39325_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossTax_2A26EE322610472955ACD47EA8A39325" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal and state income taxes</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossTax_2A26EE322610472955ACD47EA8A39325_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossTax_2A26EE322610472955ACD47EA8A39325" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Comprehensive Income (Loss), Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_2A26EE322610472955ACD47EA8A39325" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossTax_2A26EE322610472955ACD47EA8A39325" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossTax_2A26EE322610472955ACD47EA8A39325" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8FBDA9CAEED7AE3FF1D5D47EA8A33737_totalLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8FBDA9CAEED7AE3FF1D5D47EA8A33737" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss), net of income taxes</link:label>
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8FBDA9CAEED7AE3FF1D5D47EA8A33737_label_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8FBDA9CAEED7AE3FF1D5D47EA8A33737" 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_8FBDA9CAEED7AE3FF1D5D47EA8A33737" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8FBDA9CAEED7AE3FF1D5D47EA8A33737" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8FBDA9CAEED7AE3FF1D5D47EA8A33737" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0BF961E347882AC1F708D47EA8A3F3A5_terseLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0BF961E347882AC1F708D47EA8A3F3A5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0BF961E347882AC1F708D47EA8A3F3A5_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0BF961E347882AC1F708D47EA8A3F3A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0BF961E347882AC1F708D47EA8A3F3A5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0BF961E347882AC1F708D47EA8A3F3A5" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_0BF961E347882AC1F708D47EA8A3F3A5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_CA937C53FE64932E5285D47EA8A3FC4F_verboseLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_CA937C53FE64932E5285D47EA8A3FC4F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income attributable to non-controlling interests</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_CA937C53FE64932E5285D47EA8A3FC4F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_CA937C53FE64932E5285D47EA8A3FC4F" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_CA937C53FE64932E5285D47EA8A3FC4F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_0E614F90EC81DE646CFCD47EA8A377CC_totalLabel_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax_0E614F90EC81DE646CFCD47EA8A377CC" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Comprehensive income attributable to BOK Financial Corp. shareholders</link:label>
    <link:label id="lab_us-gaap_ComprehensiveIncomeNetOfTax_0E614F90EC81DE646CFCD47EA8A377CC_label_en-US" xlink:label="lab_us-gaap_ComprehensiveIncomeNetOfTax_0E614F90EC81DE646CFCD47EA8A377CC" 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_0E614F90EC81DE646CFCD47EA8A377CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_0E614F90EC81DE646CFCD47EA8A377CC" xlink:to="lab_us-gaap_ComprehensiveIncomeNetOfTax_0E614F90EC81DE646CFCD47EA8A377CC" xlink:type="arc" />
    <link:label id="lab_us-gaap_MortgageBankingAbstract_52BF4F73F01998A4B2F1D47EA6CA38D9_label_en-US" xlink:label="lab_us-gaap_MortgageBankingAbstract_52BF4F73F01998A4B2F1D47EA6CA38D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Banking [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MortgageBankingAbstract" xlink:label="loc_us-gaap_MortgageBankingAbstract_52BF4F73F01998A4B2F1D47EA6CA38D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgageBankingAbstract_52BF4F73F01998A4B2F1D47EA6CA38D9" xlink:to="lab_us-gaap_MortgageBankingAbstract_52BF4F73F01998A4B2F1D47EA6CA38D9" xlink:type="arc" />
    <link:label id="lab_bokf_MortgageBankingActivitiesTextBlock_FB4F293D16E85CE4CE99D47EA6CA8007_terseLabel_en-US" xlink:label="lab_bokf_MortgageBankingActivitiesTextBlock_FB4F293D16E85CE4CE99D47EA6CA8007" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage Banking Activities [Text Block]</link:label>
    <link:label id="lab_bokf_MortgageBankingActivitiesTextBlock_FB4F293D16E85CE4CE99D47EA6CA8007_label_en-US" xlink:label="lab_bokf_MortgageBankingActivitiesTextBlock_FB4F293D16E85CE4CE99D47EA6CA8007" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Banking Activities [Text Block]</link:label>
    <link:label id="lab_bokf_MortgageBankingActivitiesTextBlock_FB4F293D16E85CE4CE99D47EA6CA8007_documentation_en-US" xlink:label="lab_bokf_MortgageBankingActivitiesTextBlock_FB4F293D16E85CE4CE99D47EA6CA8007" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mortgage Banking Activities [Text Block]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MortgageBankingActivitiesTextBlock" xlink:label="loc_bokf_MortgageBankingActivitiesTextBlock_FB4F293D16E85CE4CE99D47EA6CA8007" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MortgageBankingActivitiesTextBlock_FB4F293D16E85CE4CE99D47EA6CA8007" xlink:to="lab_bokf_MortgageBankingActivitiesTextBlock_FB4F293D16E85CE4CE99D47EA6CA8007" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_40E2530C664A08FE3EC9C625F13F0494_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_40E2530C664A08FE3EC9C625F13F0494" 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_40E2530C664A08FE3EC9C625F13F0494_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_40E2530C664A08FE3EC9C625F13F0494" 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_40E2530C664A08FE3EC9C625F13F0494" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_40E2530C664A08FE3EC9C625F13F0494" xlink:to="lab_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_40E2530C664A08FE3EC9C625F13F0494" xlink:type="arc" />
    <link:label id="lab_bokf_EnergyProducersMember_CE3F2E3CD29F01C2B37CC625F13FA299_terseLabel_en-US" xlink:label="lab_bokf_EnergyProducersMember_CE3F2E3CD29F01C2B37CC625F13FA299" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Energy Producers [Member]</link:label>
    <link:label id="lab_bokf_EnergyProducersMember_CE3F2E3CD29F01C2B37CC625F13FA299_label_en-US" xlink:label="lab_bokf_EnergyProducersMember_CE3F2E3CD29F01C2B37CC625F13FA299" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Energy Producers [Member]</link:label>
    <link:label id="lab_bokf_EnergyProducersMember_CE3F2E3CD29F01C2B37CC625F13FA299_documentation_en-US" xlink:label="lab_bokf_EnergyProducersMember_CE3F2E3CD29F01C2B37CC625F13FA299" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Energy Producers [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_EnergyProducersMember" xlink:label="loc_bokf_EnergyProducersMember_CE3F2E3CD29F01C2B37CC625F13FA299" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_EnergyProducersMember_CE3F2E3CD29F01C2B37CC625F13FA299" xlink:to="lab_bokf_EnergyProducersMember_CE3F2E3CD29F01C2B37CC625F13FA299" xlink:type="arc" />
    <link:label id="lab_srt_StatementGeographicalAxis_62FC31EF5F471FD10477C625F13F2F51_terseLabel_en-US" xlink:label="lab_srt_StatementGeographicalAxis_62FC31EF5F471FD10477C625F13F2F51" 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_62FC31EF5F471FD10477C625F13F2F51_label_en-US" xlink:label="lab_srt_StatementGeographicalAxis_62FC31EF5F471FD10477C625F13F2F51" 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_62FC31EF5F471FD10477C625F13F2F51" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_StatementGeographicalAxis_62FC31EF5F471FD10477C625F13F2F51" xlink:to="lab_srt_StatementGeographicalAxis_62FC31EF5F471FD10477C625F13F2F51" xlink:type="arc" />
    <link:label id="lab_srt_SegmentGeographicalDomain_67FBEAE7214C41CB7476C625F13F2EF6_terseLabel_en-US" xlink:label="lab_srt_SegmentGeographicalDomain_67FBEAE7214C41CB7476C625F13F2EF6" 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_67FBEAE7214C41CB7476C625F13F2EF6_label_en-US" xlink:label="lab_srt_SegmentGeographicalDomain_67FBEAE7214C41CB7476C625F13F2EF6" 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_67FBEAE7214C41CB7476C625F13F2EF6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_SegmentGeographicalDomain_67FBEAE7214C41CB7476C625F13F2EF6" xlink:to="lab_srt_SegmentGeographicalDomain_67FBEAE7214C41CB7476C625F13F2EF6" xlink:type="arc" />
    <link:label id="lab_stpr_TX_918C93B60449586817C4C625F13F255D_terseLabel_en-US" xlink:label="lab_stpr_TX_918C93B60449586817C4C625F13F255D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Texas [Member]</link:label>
    <link:label id="lab_stpr_TX_918C93B60449586817C4C625F13F255D_label_en-US" xlink:label="lab_stpr_TX_918C93B60449586817C4C625F13F255D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TEXAS</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_TX" xlink:label="loc_stpr_TX_918C93B60449586817C4C625F13F255D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_stpr_TX_918C93B60449586817C4C625F13F255D" xlink:to="lab_stpr_TX_918C93B60449586817C4C625F13F255D" xlink:type="arc" />
    <link:label id="lab_stpr_OK_96C47A4FC331AAA0BEB2C625F13F8351_terseLabel_en-US" xlink:label="lab_stpr_OK_96C47A4FC331AAA0BEB2C625F13F8351" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Oklahoma [Member]</link:label>
    <link:label id="lab_stpr_OK_96C47A4FC331AAA0BEB2C625F13F8351_label_en-US" xlink:label="lab_stpr_OK_96C47A4FC331AAA0BEB2C625F13F8351" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OKLAHOMA</link:label>
    <link:loc xlink:href="https://xbrl.sec.gov/stpr/2018/stpr-2018-01-31.xsd#stpr_OK" xlink:label="loc_stpr_OK_96C47A4FC331AAA0BEB2C625F13F8351" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_stpr_OK_96C47A4FC331AAA0BEB2C625F13F8351" xlink:to="lab_stpr_OK_96C47A4FC331AAA0BEB2C625F13F8351" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConcentrationRiskByTypeAxis_6C9CB6502470ECCD9ACCC625F13F93AF_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis_6C9CB6502470ECCD9ACCC625F13F93AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Axis]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskByTypeAxis_6C9CB6502470ECCD9ACCC625F13F93AF_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis_6C9CB6502470ECCD9ACCC625F13F93AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_6C9CB6502470ECCD9ACCC625F13F93AF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_6C9CB6502470ECCD9ACCC625F13F93AF" xlink:to="lab_us-gaap_ConcentrationRiskByTypeAxis_6C9CB6502470ECCD9ACCC625F13F93AF" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConcentrationRiskTypeDomain_CEC6B6A87FDC8F456D3EC625F13F33C9_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain_CEC6B6A87FDC8F456D3EC625F13F33C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskTypeDomain_CEC6B6A87FDC8F456D3EC625F13F33C9_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskTypeDomain_CEC6B6A87FDC8F456D3EC625F13F33C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_CEC6B6A87FDC8F456D3EC625F13F33C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_CEC6B6A87FDC8F456D3EC625F13F33C9" xlink:to="lab_us-gaap_ConcentrationRiskTypeDomain_CEC6B6A87FDC8F456D3EC625F13F33C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_GeographicConcentrationRiskMember_B2AC5AC06ACBCF688F15C625F13F4E00_terseLabel_en-US" xlink:label="lab_us-gaap_GeographicConcentrationRiskMember_B2AC5AC06ACBCF688F15C625F13F4E00" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographic Concentration Risk [Member]</link:label>
    <link:label id="lab_us-gaap_GeographicConcentrationRiskMember_B2AC5AC06ACBCF688F15C625F13F4E00_label_en-US" xlink:label="lab_us-gaap_GeographicConcentrationRiskMember_B2AC5AC06ACBCF688F15C625F13F4E00" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographic Concentration Risk [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GeographicConcentrationRiskMember" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember_B2AC5AC06ACBCF688F15C625F13F4E00" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeographicConcentrationRiskMember_B2AC5AC06ACBCF688F15C625F13F4E00" xlink:to="lab_us-gaap_GeographicConcentrationRiskMember_B2AC5AC06ACBCF688F15C625F13F4E00" xlink:type="arc" />
    <link:label id="lab_us-gaap_CreditConcentrationRiskMember_69318AB5E52C8A7AE713C625F13F073A_terseLabel_en-US" xlink:label="lab_us-gaap_CreditConcentrationRiskMember_69318AB5E52C8A7AE713C625F13F073A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Concentration Risk [Member]</link:label>
    <link:label id="lab_us-gaap_CreditConcentrationRiskMember_69318AB5E52C8A7AE713C625F13F073A_label_en-US" xlink:label="lab_us-gaap_CreditConcentrationRiskMember_69318AB5E52C8A7AE713C625F13F073A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Concentration Risk [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CreditConcentrationRiskMember" xlink:label="loc_us-gaap_CreditConcentrationRiskMember_69318AB5E52C8A7AE713C625F13F073A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CreditConcentrationRiskMember_69318AB5E52C8A7AE713C625F13F073A" xlink:to="lab_us-gaap_CreditConcentrationRiskMember_69318AB5E52C8A7AE713C625F13F073A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_E0FDA4A03A8880E53B2AC625F13FEC5C_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_E0FDA4A03A8880E53B2AC625F13FEC5C" 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_E0FDA4A03A8880E53B2AC625F13FEC5C_label_en-US" xlink:label="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_E0FDA4A03A8880E53B2AC625F13FEC5C" 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_E0FDA4A03A8880E53B2AC625F13FEC5C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_E0FDA4A03A8880E53B2AC625F13FEC5C" xlink:to="lab_us-gaap_AccountsNotesAndLoansReceivableLineItems_E0FDA4A03A8880E53B2AC625F13FEC5C" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableDisclosureAbstract_C5C20AA808E9DA0F513AC625F13FE7B2_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableDisclosureAbstract_C5C20AA808E9DA0F513AC625F13FE7B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan receivables disclosure [Abstract]</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableDisclosureAbstract_C5C20AA808E9DA0F513AC625F13FE7B2_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableDisclosureAbstract_C5C20AA808E9DA0F513AC625F13FE7B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableDisclosureAbstract" xlink:label="loc_us-gaap_LoansAndLeasesReceivableDisclosureAbstract_C5C20AA808E9DA0F513AC625F13FE7B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableDisclosureAbstract_C5C20AA808E9DA0F513AC625F13FE7B2" xlink:to="lab_us-gaap_LoansAndLeasesReceivableDisclosureAbstract_C5C20AA808E9DA0F513AC625F13FE7B2" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableWithFixedRatesOfInterest1_95AF220477173CEF7ED4C625F13FC66C_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableWithFixedRatesOfInterest1_95AF220477173CEF7ED4C625F13FC66C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans, fixed rate of interest</link:label>
    <link:label id="lab_us-gaap_LoansReceivableWithFixedRatesOfInterest1_95AF220477173CEF7ED4C625F13FC66C_label_en-US" xlink:label="lab_us-gaap_LoansReceivableWithFixedRatesOfInterest1_95AF220477173CEF7ED4C625F13FC66C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable with Fixed Rates of Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableWithFixedRatesOfInterest1" xlink:label="loc_us-gaap_LoansReceivableWithFixedRatesOfInterest1_95AF220477173CEF7ED4C625F13FC66C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableWithFixedRatesOfInterest1_95AF220477173CEF7ED4C625F13FC66C" xlink:to="lab_us-gaap_LoansReceivableWithFixedRatesOfInterest1_95AF220477173CEF7ED4C625F13FC66C" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableWithVariableRatesOfInterest1_A55D8AEF9DCD9DE3D7A6C625F13F8343_terseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableWithVariableRatesOfInterest1_A55D8AEF9DCD9DE3D7A6C625F13F8343" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans, variable rate of interest</link:label>
    <link:label id="lab_us-gaap_LoansReceivableWithVariableRatesOfInterest1_A55D8AEF9DCD9DE3D7A6C625F13F8343_label_en-US" xlink:label="lab_us-gaap_LoansReceivableWithVariableRatesOfInterest1_A55D8AEF9DCD9DE3D7A6C625F13F8343" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Receivable with Variable Rates of Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableWithVariableRatesOfInterest1" xlink:label="loc_us-gaap_LoansReceivableWithVariableRatesOfInterest1_A55D8AEF9DCD9DE3D7A6C625F13F8343" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableWithVariableRatesOfInterest1_A55D8AEF9DCD9DE3D7A6C625F13F8343" xlink:to="lab_us-gaap_LoansReceivableWithVariableRatesOfInterest1_A55D8AEF9DCD9DE3D7A6C625F13F8343" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest_6DCF0B15559371D5431AC625F13F25C5_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest_6DCF0B15559371D5431AC625F13F25C5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans, non-accrual</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest_6DCF0B15559371D5431AC625F13F25C5_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest_6DCF0B15559371D5431AC625F13F25C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest" xlink:label="loc_us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest_6DCF0B15559371D5431AC625F13F25C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest_6DCF0B15559371D5431AC625F13F25C5" xlink:to="lab_us-gaap_LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest_6DCF0B15559371D5431AC625F13F25C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_070F772EE928B4D60119C625F13F4C62_totalLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_070F772EE928B4D60119C625F13F4C62" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</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_070F772EE928B4D60119C625F13F4C62" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_070F772EE928B4D60119C625F13F4C62" xlink:to="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_070F772EE928B4D60119C625F13F4C62" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_8BEADC5158FBAEE43B1DC625F13FBEEA_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_8BEADC5158FBAEE43B1DC625F13FBEEA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accruing loans past due (90 days)</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_8BEADC5158FBAEE43B1DC625F13FBEEA_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_8BEADC5158FBAEE43B1DC625F13FBEEA" 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_8BEADC5158FBAEE43B1DC625F13FBEEA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_8BEADC5158FBAEE43B1DC625F13FBEEA" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing_8BEADC5158FBAEE43B1DC625F13FBEEA" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableOtherInformationAbstract_8C1E626A76731B1D58ADC625F13FFD88_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableOtherInformationAbstract_8C1E626A76731B1D58ADC625F13FFD88" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans receivable, other information [Abstract]</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableOtherInformationAbstract_8C1E626A76731B1D58ADC625F13FFD88_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableOtherInformationAbstract_8C1E626A76731B1D58ADC625F13FFD88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Leases Receivable, Other Information [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansAndLeasesReceivableOtherInformationAbstract" xlink:label="loc_us-gaap_LoansAndLeasesReceivableOtherInformationAbstract_8C1E626A76731B1D58ADC625F13FFD88" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableOtherInformationAbstract_8C1E626A76731B1D58ADC625F13FFD88" xlink:to="lab_us-gaap_LoansAndLeasesReceivableOtherInformationAbstract_8C1E626A76731B1D58ADC625F13FFD88" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageofLoanPortfolioAttributedtoTexas_BA0F578EB04A69A785F1C625F13FE212_verboseLabel_en-US" xlink:label="lab_bokf_PercentageofLoanPortfolioAttributedtoTexas_BA0F578EB04A69A785F1C625F13FE212" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Percentage of loan portfolio attributed to Texas (in hundredths)</link:label>
    <link:label id="lab_bokf_PercentageofLoanPortfolioAttributedtoTexas_BA0F578EB04A69A785F1C625F13FE212_label_en-US" xlink:label="lab_bokf_PercentageofLoanPortfolioAttributedtoTexas_BA0F578EB04A69A785F1C625F13FE212" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of Loan Portfolio Attributed to Texas</link:label>
    <link:label id="lab_bokf_PercentageofLoanPortfolioAttributedtoTexas_BA0F578EB04A69A785F1C625F13FE212_documentation_en-US" xlink:label="lab_bokf_PercentageofLoanPortfolioAttributedtoTexas_BA0F578EB04A69A785F1C625F13FE212" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reflects the percentage of the loan portfolio attributed to Texas.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageofLoanPortfolioAttributedtoTexas" xlink:label="loc_bokf_PercentageofLoanPortfolioAttributedtoTexas_BA0F578EB04A69A785F1C625F13FE212" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageofLoanPortfolioAttributedtoTexas_BA0F578EB04A69A785F1C625F13FE212" xlink:to="lab_bokf_PercentageofLoanPortfolioAttributedtoTexas_BA0F578EB04A69A785F1C625F13FE212" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageofLoanPortfolioAttributedtoOklahoma_7BAE4055C41BB0C4BCEAC625F13F0B98_verboseLabel_en-US" xlink:label="lab_bokf_PercentageofLoanPortfolioAttributedtoOklahoma_7BAE4055C41BB0C4BCEAC625F13F0B98" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Percentage of loan portfolio attributed to Oklahoma (in hundredths)</link:label>
    <link:label id="lab_bokf_PercentageofLoanPortfolioAttributedtoOklahoma_7BAE4055C41BB0C4BCEAC625F13F0B98_label_en-US" xlink:label="lab_bokf_PercentageofLoanPortfolioAttributedtoOklahoma_7BAE4055C41BB0C4BCEAC625F13F0B98" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of Loan Portfolio Attributed to Oklahoma</link:label>
    <link:label id="lab_bokf_PercentageofLoanPortfolioAttributedtoOklahoma_7BAE4055C41BB0C4BCEAC625F13F0B98_documentation_en-US" xlink:label="lab_bokf_PercentageofLoanPortfolioAttributedtoOklahoma_7BAE4055C41BB0C4BCEAC625F13F0B98" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reflects the percentage of the loan portfolio attributed to Oklahoma.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageofLoanPortfolioAttributedtoOklahoma" xlink:label="loc_bokf_PercentageofLoanPortfolioAttributedtoOklahoma_7BAE4055C41BB0C4BCEAC625F13F0B98" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageofLoanPortfolioAttributedtoOklahoma_7BAE4055C41BB0C4BCEAC625F13F0B98" xlink:to="lab_bokf_PercentageofLoanPortfolioAttributedtoOklahoma_7BAE4055C41BB0C4BCEAC625F13F0B98" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageofLoanClasstoTotalLoans_CBA8DFCA0427905C2B33C625F13FFB0E_terseLabel_en-US" xlink:label="lab_bokf_PercentageofLoanClasstoTotalLoans_CBA8DFCA0427905C2B33C625F13FFB0E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of loan class to total loans</link:label>
    <link:label id="lab_bokf_PercentageofLoanClasstoTotalLoans_CBA8DFCA0427905C2B33C625F13FFB0E_label_en-US" xlink:label="lab_bokf_PercentageofLoanClasstoTotalLoans_CBA8DFCA0427905C2B33C625F13FFB0E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of Loan Class to Total Loans</link:label>
    <link:label id="lab_bokf_PercentageofLoanClasstoTotalLoans_CBA8DFCA0427905C2B33C625F13FFB0E_documentation_en-US" xlink:label="lab_bokf_PercentageofLoanClasstoTotalLoans_CBA8DFCA0427905C2B33C625F13FFB0E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents percentage of given loan class to total loans.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageofLoanClasstoTotalLoans" xlink:label="loc_bokf_PercentageofLoanClasstoTotalLoans_CBA8DFCA0427905C2B33C625F13FFB0E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageofLoanClasstoTotalLoans_CBA8DFCA0427905C2B33C625F13FFB0E" xlink:to="lab_bokf_PercentageofLoanClasstoTotalLoans_CBA8DFCA0427905C2B33C625F13FFB0E" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByOil_08D76A602F122F672EA0C625F13F6BA1_terseLabel_en-US" xlink:label="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByOil_08D76A602F122F672EA0C625F13F6BA1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of committed energy production loans secured by oil</link:label>
    <link:label id="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByOil_08D76A602F122F672EA0C625F13F6BA1_label_en-US" xlink:label="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByOil_08D76A602F122F672EA0C625F13F6BA1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of committed energy production loans secured by oil</link:label>
    <link:label id="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByOil_08D76A602F122F672EA0C625F13F6BA1_documentation_en-US" xlink:label="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByOil_08D76A602F122F672EA0C625F13F6BA1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of committed energy production loans secured by properties primarily producing oil</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageOfCommittedEnergyProductionLoansSecuredByOil" xlink:label="loc_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByOil_08D76A602F122F672EA0C625F13F6BA1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByOil_08D76A602F122F672EA0C625F13F6BA1" xlink:to="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByOil_08D76A602F122F672EA0C625F13F6BA1" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByNaturalGas_82795F258FE340CAAB43C625F13FDA34_terseLabel_en-US" xlink:label="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByNaturalGas_82795F258FE340CAAB43C625F13FDA34" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of committed energy production loans secured by natural gas</link:label>
    <link:label id="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByNaturalGas_82795F258FE340CAAB43C625F13FDA34_label_en-US" xlink:label="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByNaturalGas_82795F258FE340CAAB43C625F13FDA34" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of committed energy production loans secured by natural gas</link:label>
    <link:label id="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByNaturalGas_82795F258FE340CAAB43C625F13FDA34_documentation_en-US" xlink:label="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByNaturalGas_82795F258FE340CAAB43C625F13FDA34" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of committed energy production loans secured by properties producing natural gas</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageOfCommittedEnergyProductionLoansSecuredByNaturalGas" xlink:label="loc_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByNaturalGas_82795F258FE340CAAB43C625F13FDA34" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByNaturalGas_82795F258FE340CAAB43C625F13FDA34" xlink:to="lab_bokf_PercentageOfCommittedEnergyProductionLoansSecuredByNaturalGas_82795F258FE340CAAB43C625F13FDA34" xlink:type="arc" />
    <link:label id="lab_bokf_MaximumAmountOfLoansWithBalancesBelowThreshold_C21D57878D87D3834A26C625F13F548D_verboseLabel_en-US" xlink:label="lab_bokf_MaximumAmountOfLoansWithBalancesBelowThreshold_C21D57878D87D3834A26C625F13F548D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Amount of loans with individual balances less than $10 million</link:label>
    <link:label id="lab_bokf_MaximumAmountOfLoansWithBalancesBelowThreshold_C21D57878D87D3834A26C625F13F548D_label_en-US" xlink:label="lab_bokf_MaximumAmountOfLoansWithBalancesBelowThreshold_C21D57878D87D3834A26C625F13F548D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Amount Of Loans With Balances Below Threshold</link:label>
    <link:label id="lab_bokf_MaximumAmountOfLoansWithBalancesBelowThreshold_C21D57878D87D3834A26C625F13F548D_documentation_en-US" xlink:label="lab_bokf_MaximumAmountOfLoansWithBalancesBelowThreshold_C21D57878D87D3834A26C625F13F548D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum dollar amount of loans in this category with individual loan amount less than specified threshold.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MaximumAmountOfLoansWithBalancesBelowThreshold" xlink:label="loc_bokf_MaximumAmountOfLoansWithBalancesBelowThreshold_C21D57878D87D3834A26C625F13F548D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MaximumAmountOfLoansWithBalancesBelowThreshold_C21D57878D87D3834A26C625F13F548D" xlink:to="lab_bokf_MaximumAmountOfLoansWithBalancesBelowThreshold_C21D57878D87D3834A26C625F13F548D" xlink:type="arc" />
    <link:label id="lab_bokf_MaximumLoanAmountForCertainIndividualLoansInCategory_D46A7CB962673C40A61DC625F13FC229_verboseLabel_en-US" xlink:label="lab_bokf_MaximumLoanAmountForCertainIndividualLoansInCategory_D46A7CB962673C40A61DC625F13FC229" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Maximum loan amount for certain individual loans in category</link:label>
    <link:label id="lab_bokf_MaximumLoanAmountForCertainIndividualLoansInCategory_D46A7CB962673C40A61DC625F13FC229_label_en-US" xlink:label="lab_bokf_MaximumLoanAmountForCertainIndividualLoansInCategory_D46A7CB962673C40A61DC625F13FC229" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Loan Amount For Certain Individual Loans In Category</link:label>
    <link:label id="lab_bokf_MaximumLoanAmountForCertainIndividualLoansInCategory_D46A7CB962673C40A61DC625F13FC229_documentation_en-US" xlink:label="lab_bokf_MaximumLoanAmountForCertainIndividualLoansInCategory_D46A7CB962673C40A61DC625F13FC229" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum loan amount for specified individual loans in category.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MaximumLoanAmountForCertainIndividualLoansInCategory" xlink:label="loc_bokf_MaximumLoanAmountForCertainIndividualLoansInCategory_D46A7CB962673C40A61DC625F13FC229" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MaximumLoanAmountForCertainIndividualLoansInCategory_D46A7CB962673C40A61DC625F13FC229" xlink:to="lab_bokf_MaximumLoanAmountForCertainIndividualLoansInCategory_D46A7CB962673C40A61DC625F13FC229" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInTexas_D283059F70D9234147A4C625F13FC78C_verboseLabel_en-US" xlink:label="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInTexas_D283059F70D9234147A4C625F13FC78C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Percentage of loan portfolio secured by property in Texas (in hundredths)</link:label>
    <link:label id="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInTexas_D283059F70D9234147A4C625F13FC78C_label_en-US" xlink:label="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInTexas_D283059F70D9234147A4C625F13FC78C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of Loan Portfolio Secured By Property in Texas</link:label>
    <link:label id="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInTexas_D283059F70D9234147A4C625F13FC78C_documentation_en-US" xlink:label="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInTexas_D283059F70D9234147A4C625F13FC78C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reflects the percentage of the loan in portfolio secured by property in the state of Texas.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageOfLoanPortfolioSecuredByPropertyInTexas" xlink:label="loc_bokf_PercentageOfLoanPortfolioSecuredByPropertyInTexas_D283059F70D9234147A4C625F13FC78C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageOfLoanPortfolioSecuredByPropertyInTexas_D283059F70D9234147A4C625F13FC78C" xlink:to="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInTexas_D283059F70D9234147A4C625F13FC78C" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInOklahoma_16D4F5C81394406B9B59C625F13FE443_verboseLabel_en-US" xlink:label="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInOklahoma_16D4F5C81394406B9B59C625F13FE443" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Percentage of loan portfolio secured by property in Oklahoma (in hundredths)</link:label>
    <link:label id="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInOklahoma_16D4F5C81394406B9B59C625F13FE443_label_en-US" xlink:label="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInOklahoma_16D4F5C81394406B9B59C625F13FE443" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of Loan Portfolio Secured By Property in Oklahoma</link:label>
    <link:label id="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInOklahoma_16D4F5C81394406B9B59C625F13FE443_documentation_en-US" xlink:label="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInOklahoma_16D4F5C81394406B9B59C625F13FE443" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Reflects the percentage of the loan in portfolio secured by property in the state of Oklahoma.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageOfLoanPortfolioSecuredByPropertyInOklahoma" xlink:label="loc_bokf_PercentageOfLoanPortfolioSecuredByPropertyInOklahoma_16D4F5C81394406B9B59C625F13FE443" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageOfLoanPortfolioSecuredByPropertyInOklahoma_16D4F5C81394406B9B59C625F13FE443" xlink:to="lab_bokf_PercentageOfLoanPortfolioSecuredByPropertyInOklahoma_16D4F5C81394406B9B59C625F13FE443" xlink:type="arc" />
    <link:label id="lab_bokf_MinimumFicoRequiredForLoanApproval_4DD58DB8F2A8DAC58CE8C625F13F5C5E_verboseLabel_en-US" xlink:label="lab_bokf_MinimumFicoRequiredForLoanApproval_4DD58DB8F2A8DAC58CE8C625F13F5C5E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Minimum FICO required for jumbo loan approval</link:label>
    <link:label id="lab_bokf_MinimumFicoRequiredForLoanApproval_4DD58DB8F2A8DAC58CE8C625F13F5C5E_label_en-US" xlink:label="lab_bokf_MinimumFicoRequiredForLoanApproval_4DD58DB8F2A8DAC58CE8C625F13F5C5E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum FICO Required For Loan Approval</link:label>
    <link:label id="lab_bokf_MinimumFicoRequiredForLoanApproval_4DD58DB8F2A8DAC58CE8C625F13F5C5E_documentation_en-US" xlink:label="lab_bokf_MinimumFicoRequiredForLoanApproval_4DD58DB8F2A8DAC58CE8C625F13F5C5E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the minimum FICO score required for loan approval.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MinimumFicoRequiredForLoanApproval" xlink:label="loc_bokf_MinimumFicoRequiredForLoanApproval_4DD58DB8F2A8DAC58CE8C625F13F5C5E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MinimumFicoRequiredForLoanApproval_4DD58DB8F2A8DAC58CE8C625F13F5C5E" xlink:to="lab_bokf_MinimumFicoRequiredForLoanApproval_4DD58DB8F2A8DAC58CE8C625F13F5C5E" xlink:type="arc" />
    <link:label id="lab_bokf_MaximumDebtToIncomeRatioOnLoans_9C62A6F109996CE8AA5FC625F13FADC1_verboseLabel_en-US" xlink:label="lab_bokf_MaximumDebtToIncomeRatioOnLoans_9C62A6F109996CE8AA5FC625F13FADC1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Maximum debt-to-income ratio on jumbo loans (in hundredths)</link:label>
    <link:label id="lab_bokf_MaximumDebtToIncomeRatioOnLoans_9C62A6F109996CE8AA5FC625F13FADC1_label_en-US" xlink:label="lab_bokf_MaximumDebtToIncomeRatioOnLoans_9C62A6F109996CE8AA5FC625F13FADC1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Debt To Income Ratio On Loans</link:label>
    <link:label id="lab_bokf_MaximumDebtToIncomeRatioOnLoans_9C62A6F109996CE8AA5FC625F13FADC1_documentation_en-US" xlink:label="lab_bokf_MaximumDebtToIncomeRatioOnLoans_9C62A6F109996CE8AA5FC625F13FADC1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the maximum debt-to-income (DTI) ratio on loans approved.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MaximumDebtToIncomeRatioOnLoans" xlink:label="loc_bokf_MaximumDebtToIncomeRatioOnLoans_9C62A6F109996CE8AA5FC625F13FADC1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MaximumDebtToIncomeRatioOnLoans_9C62A6F109996CE8AA5FC625F13FADC1" xlink:to="lab_bokf_MaximumDebtToIncomeRatioOnLoans_9C62A6F109996CE8AA5FC625F13FADC1" xlink:type="arc" />
    <link:label id="lab_bokf_MinimumLoanToValueRatioOnLoans_E9CC94FCB1AD57C0A6D0C625F13F05A3_verboseLabel_en-US" xlink:label="lab_bokf_MinimumLoanToValueRatioOnLoans_E9CC94FCB1AD57C0A6D0C625F13F05A3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Minimum loan-to-value ratio on jumbo loans (in hundredths)</link:label>
    <link:label id="lab_bokf_MinimumLoanToValueRatioOnLoans_E9CC94FCB1AD57C0A6D0C625F13F05A3_label_en-US" xlink:label="lab_bokf_MinimumLoanToValueRatioOnLoans_E9CC94FCB1AD57C0A6D0C625F13F05A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum Loan To Value Ratio On Loans</link:label>
    <link:label id="lab_bokf_MinimumLoanToValueRatioOnLoans_E9CC94FCB1AD57C0A6D0C625F13F05A3_documentation_en-US" xlink:label="lab_bokf_MinimumLoanToValueRatioOnLoans_E9CC94FCB1AD57C0A6D0C625F13F05A3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the minimum loan-to-value (LTV) ratio acceptable for loans to be approved.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MinimumLoanToValueRatioOnLoans" xlink:label="loc_bokf_MinimumLoanToValueRatioOnLoans_E9CC94FCB1AD57C0A6D0C625F13F05A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MinimumLoanToValueRatioOnLoans_E9CC94FCB1AD57C0A6D0C625F13F05A3" xlink:to="lab_bokf_MinimumLoanToValueRatioOnLoans_E9CC94FCB1AD57C0A6D0C625F13F05A3" xlink:type="arc" />
    <link:label id="lab_bokf_MaximumLoanToValueRatioOnLoans_EA53D90008DEF869D0D1C625F13FA195_verboseLabel_en-US" xlink:label="lab_bokf_MaximumLoanToValueRatioOnLoans_EA53D90008DEF869D0D1C625F13FA195" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Maximum loan-to-value ratio on jumbo loans (in hundredths)</link:label>
    <link:label id="lab_bokf_MaximumLoanToValueRatioOnLoans_EA53D90008DEF869D0D1C625F13FA195_label_en-US" xlink:label="lab_bokf_MaximumLoanToValueRatioOnLoans_EA53D90008DEF869D0D1C625F13FA195" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Loan To Value Ratio On Loans</link:label>
    <link:label id="lab_bokf_MaximumLoanToValueRatioOnLoans_EA53D90008DEF869D0D1C625F13FA195_documentation_en-US" xlink:label="lab_bokf_MaximumLoanToValueRatioOnLoans_EA53D90008DEF869D0D1C625F13FA195" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the maximum loan-to-value (LTV) ratio on loans approved.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MaximumLoanToValueRatioOnLoans" xlink:label="loc_bokf_MaximumLoanToValueRatioOnLoans_EA53D90008DEF869D0D1C625F13FA195" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MaximumLoanToValueRatioOnLoans_EA53D90008DEF869D0D1C625F13FA195" xlink:to="lab_bokf_MaximumLoanToValueRatioOnLoans_EA53D90008DEF869D0D1C625F13FA195" xlink:type="arc" />
    <link:label id="lab_bokf_MinimumPeriodForFixedRateOnVariableRateJumboResidentialMortgageLoans_22A33ABDA6DE18A56A01C625F13F9351_verboseLabel_en-US" xlink:label="lab_bokf_MinimumPeriodForFixedRateOnVariableRateJumboResidentialMortgageLoans_22A33ABDA6DE18A56A01C625F13F9351" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Minimum period for fixed rate on variable rate jumbo loans (in years)</link:label>
    <link:label id="lab_bokf_MinimumPeriodForFixedRateOnVariableRateJumboResidentialMortgageLoans_22A33ABDA6DE18A56A01C625F13F9351_label_en-US" xlink:label="lab_bokf_MinimumPeriodForFixedRateOnVariableRateJumboResidentialMortgageLoans_22A33ABDA6DE18A56A01C625F13F9351" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum Period For Fixed Rate On Variable Rate Jumbo Residential Mortgage Loans</link:label>
    <link:label id="lab_bokf_MinimumPeriodForFixedRateOnVariableRateJumboResidentialMortgageLoans_22A33ABDA6DE18A56A01C625F13F9351_documentation_en-US" xlink:label="lab_bokf_MinimumPeriodForFixedRateOnVariableRateJumboResidentialMortgageLoans_22A33ABDA6DE18A56A01C625F13F9351" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The minimum number o years that a variable rate jumbo residential mortgage loan will have a fixed rate of interest.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MinimumPeriodForFixedRateOnVariableRateJumboResidentialMortgageLoans" xlink:label="loc_bokf_MinimumPeriodForFixedRateOnVariableRateJumboResidentialMortgageLoans_22A33ABDA6DE18A56A01C625F13F9351" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MinimumPeriodForFixedRateOnVariableRateJumboResidentialMortgageLoans_22A33ABDA6DE18A56A01C625F13F9351" xlink:to="lab_bokf_MinimumPeriodForFixedRateOnVariableRateJumboResidentialMortgageLoans_22A33ABDA6DE18A56A01C625F13F9351" xlink:type="arc" />
    <link:label id="lab_bokf_MaximumPeriodforFixedRateonVariableRateJumboResidentialMortgageLoan_1BCDC7331C955B49ACA5C625F13FD9EE_verboseLabel_en-US" xlink:label="lab_bokf_MaximumPeriodforFixedRateonVariableRateJumboResidentialMortgageLoan_1BCDC7331C955B49ACA5C625F13FD9EE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Maximum period for fixed rate on variable rate jumbo loans (in years)</link:label>
    <link:label id="lab_bokf_MaximumPeriodforFixedRateonVariableRateJumboResidentialMortgageLoan_1BCDC7331C955B49ACA5C625F13FD9EE_label_en-US" xlink:label="lab_bokf_MaximumPeriodforFixedRateonVariableRateJumboResidentialMortgageLoan_1BCDC7331C955B49ACA5C625F13FD9EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Period for Fixed Rate on Variable Rate Jumbo Residential Mortgage Loan</link:label>
    <link:label id="lab_bokf_MaximumPeriodforFixedRateonVariableRateJumboResidentialMortgageLoan_1BCDC7331C955B49ACA5C625F13FD9EE_documentation_en-US" xlink:label="lab_bokf_MaximumPeriodforFixedRateonVariableRateJumboResidentialMortgageLoan_1BCDC7331C955B49ACA5C625F13FD9EE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represent the maximum number of years that a variable rate jumbo residential mortgage loan will have a fixed rate of interest.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MaximumPeriodforFixedRateonVariableRateJumboResidentialMortgageLoan" xlink:label="loc_bokf_MaximumPeriodforFixedRateonVariableRateJumboResidentialMortgageLoan_1BCDC7331C955B49ACA5C625F13FD9EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MaximumPeriodforFixedRateonVariableRateJumboResidentialMortgageLoan_1BCDC7331C955B49ACA5C625F13FD9EE" xlink:to="lab_bokf_MaximumPeriodforFixedRateonVariableRateJumboResidentialMortgageLoan_1BCDC7331C955B49ACA5C625F13FD9EE" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfFirstLienLoans_8D548AF1C69FD768E6F2C625F13FA1D6_terseLabel_en-US" xlink:label="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfFirstLienLoans_8D548AF1C69FD768E6F2C625F13FA1D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of home equity portfolio comprised of first lien loans</link:label>
    <link:label id="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfFirstLienLoans_8D548AF1C69FD768E6F2C625F13FA1D6_label_en-US" xlink:label="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfFirstLienLoans_8D548AF1C69FD768E6F2C625F13FA1D6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of home equity portfolio comprised of first lien loans</link:label>
    <link:label id="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfFirstLienLoans_8D548AF1C69FD768E6F2C625F13FA1D6_documentation_en-US" xlink:label="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfFirstLienLoans_8D548AF1C69FD768E6F2C625F13FA1D6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of home equity portfolio comprised of first lien loans</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageOfHomeEquityPortfolioComprisedOfFirstLienLoans" xlink:label="loc_bokf_PercentageOfHomeEquityPortfolioComprisedOfFirstLienLoans_8D548AF1C69FD768E6F2C625F13FA1D6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageOfHomeEquityPortfolioComprisedOfFirstLienLoans_8D548AF1C69FD768E6F2C625F13FA1D6" xlink:to="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfFirstLienLoans_8D548AF1C69FD768E6F2C625F13FA1D6" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfJuniorLienLoans_9217E57D92B71C604B8CC625F14E9ED4_terseLabel_en-US" xlink:label="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfJuniorLienLoans_9217E57D92B71C604B8CC625F14E9ED4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of home equity portfolio comprised of junior lien loans</link:label>
    <link:label id="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfJuniorLienLoans_9217E57D92B71C604B8CC625F14E9ED4_label_en-US" xlink:label="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfJuniorLienLoans_9217E57D92B71C604B8CC625F14E9ED4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of home equity portfolio comprised of junior lien loans</link:label>
    <link:label id="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfJuniorLienLoans_9217E57D92B71C604B8CC625F14E9ED4_documentation_en-US" xlink:label="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfJuniorLienLoans_9217E57D92B71C604B8CC625F14E9ED4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of home equity portfolio comprised of junior lien loans</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageOfHomeEquityPortfolioComprisedOfJuniorLienLoans" xlink:label="loc_bokf_PercentageOfHomeEquityPortfolioComprisedOfJuniorLienLoans_9217E57D92B71C604B8CC625F14E9ED4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageOfHomeEquityPortfolioComprisedOfJuniorLienLoans_9217E57D92B71C604B8CC625F14E9ED4" xlink:to="lab_bokf_PercentageOfHomeEquityPortfolioComprisedOfJuniorLienLoans_9217E57D92B71C604B8CC625F14E9ED4" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreAmortizingTermLoans_9ED58CEC7D47B7E920D8C625F14EAB26_terseLabel_en-US" xlink:label="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreAmortizingTermLoans_9ED58CEC7D47B7E920D8C625F14EAB26" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of junior lien home equity loans that are amortizing term loans</link:label>
    <link:label id="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreAmortizingTermLoans_9ED58CEC7D47B7E920D8C625F14EAB26_label_en-US" xlink:label="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreAmortizingTermLoans_9ED58CEC7D47B7E920D8C625F14EAB26" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of junior lien home equity loans that are amortizing term loans</link:label>
    <link:label id="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreAmortizingTermLoans_9ED58CEC7D47B7E920D8C625F14EAB26_documentation_en-US" xlink:label="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreAmortizingTermLoans_9ED58CEC7D47B7E920D8C625F14EAB26" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of junior lien home equity loans that are amortizing term loans</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageOfJuniorLienHomeEquityLoansThatAreAmortizingTermLoans" xlink:label="loc_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreAmortizingTermLoans_9ED58CEC7D47B7E920D8C625F14EAB26" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreAmortizingTermLoans_9ED58CEC7D47B7E920D8C625F14EAB26" xlink:to="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreAmortizingTermLoans_9ED58CEC7D47B7E920D8C625F14EAB26" xlink:type="arc" />
    <link:label id="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreRevolvingLinesOfCredit_E8791384841970345BC8C625F14E9A1B_terseLabel_en-US" xlink:label="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreRevolvingLinesOfCredit_E8791384841970345BC8C625F14E9A1B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of junior lien home equity loans that are revolving lines of credit</link:label>
    <link:label id="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreRevolvingLinesOfCredit_E8791384841970345BC8C625F14E9A1B_label_en-US" xlink:label="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreRevolvingLinesOfCredit_E8791384841970345BC8C625F14E9A1B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage of junior lien home equity loans that are revolving lines of credit</link:label>
    <link:label id="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreRevolvingLinesOfCredit_E8791384841970345BC8C625F14E9A1B_documentation_en-US" xlink:label="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreRevolvingLinesOfCredit_E8791384841970345BC8C625F14E9A1B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of junior lien home equity loans that are revolving lines of credit</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PercentageOfJuniorLienHomeEquityLoansThatAreRevolvingLinesOfCredit" xlink:label="loc_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreRevolvingLinesOfCredit_E8791384841970345BC8C625F14E9A1B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreRevolvingLinesOfCredit_E8791384841970345BC8C625F14E9A1B" xlink:to="lab_bokf_PercentageOfJuniorLienHomeEquityLoansThatAreRevolvingLinesOfCredit_E8791384841970345BC8C625F14E9A1B" xlink:type="arc" />
    <link:label id="lab_bokf_HomeEquityLoansDescription_39F02C891885CE1768E2C625F14E157E_terseLabel_en-US" xlink:label="lab_bokf_HomeEquityLoansDescription_39F02C891885CE1768E2C625F14E157E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Home equity loans, description</link:label>
    <link:label id="lab_bokf_HomeEquityLoansDescription_39F02C891885CE1768E2C625F14E157E_label_en-US" xlink:label="lab_bokf_HomeEquityLoansDescription_39F02C891885CE1768E2C625F14E157E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Home equity loans, description</link:label>
    <link:label id="lab_bokf_HomeEquityLoansDescription_39F02C891885CE1768E2C625F14E157E_documentation_en-US" xlink:label="lab_bokf_HomeEquityLoansDescription_39F02C891885CE1768E2C625F14E157E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Describes the general components and status of home equity loans serviced by the entity outstanding as of the Balance Sheet date.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HomeEquityLoansDescription" xlink:label="loc_bokf_HomeEquityLoansDescription_39F02C891885CE1768E2C625F14E157E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HomeEquityLoansDescription_39F02C891885CE1768E2C625F14E157E" xlink:to="lab_bokf_HomeEquityLoansDescription_39F02C891885CE1768E2C625F14E157E" xlink:type="arc" />
    <link:label id="lab_bokf_Homeequityloansmaximum_2FC03081E18C7D22CBCBC625F14EF8C7_terseLabel_en-US" xlink:label="lab_bokf_Homeequityloansmaximum_2FC03081E18C7D22CBCBC625F14EF8C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Home equity loans, maximum</link:label>
    <link:label id="lab_bokf_Homeequityloansmaximum_2FC03081E18C7D22CBCBC625F14EF8C7_label_en-US" xlink:label="lab_bokf_Homeequityloansmaximum_2FC03081E18C7D22CBCBC625F14EF8C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Home equity loans, maximum</link:label>
    <link:label id="lab_bokf_Homeequityloansmaximum_2FC03081E18C7D22CBCBC625F14EF8C7_documentation_en-US" xlink:label="lab_bokf_Homeequityloansmaximum_2FC03081E18C7D22CBCBC625F14EF8C7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The generally accepted maximum loan amount for a home equity loan issued by the Company.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Homeequityloansmaximum" xlink:label="loc_bokf_Homeequityloansmaximum_2FC03081E18C7D22CBCBC625F14EF8C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Homeequityloansmaximum_2FC03081E18C7D22CBCBC625F14EF8C7" xlink:to="lab_bokf_Homeequityloansmaximum_2FC03081E18C7D22CBCBC625F14EF8C7" xlink:type="arc" />
    <link:label id="lab_bokf_RevolvingPeriodforHomeEquityLoans_A98B8BC13E23317B2613C625F14ED53A_terseLabel_en-US" xlink:label="lab_bokf_RevolvingPeriodforHomeEquityLoans_A98B8BC13E23317B2613C625F14ED53A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Home equity loans, revolving period</link:label>
    <link:label id="lab_bokf_RevolvingPeriodforHomeEquityLoans_A98B8BC13E23317B2613C625F14ED53A_label_en-US" xlink:label="lab_bokf_RevolvingPeriodforHomeEquityLoans_A98B8BC13E23317B2613C625F14ED53A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Period for Home Equity Loans</link:label>
    <link:label id="lab_bokf_RevolvingPeriodforHomeEquityLoans_A98B8BC13E23317B2613C625F14ED53A_documentation_en-US" xlink:label="lab_bokf_RevolvingPeriodforHomeEquityLoans_A98B8BC13E23317B2613C625F14ED53A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the revolving period for home equity loans.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_RevolvingPeriodforHomeEquityLoans" xlink:label="loc_bokf_RevolvingPeriodforHomeEquityLoans_A98B8BC13E23317B2613C625F14ED53A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_RevolvingPeriodforHomeEquityLoans_A98B8BC13E23317B2613C625F14ED53A" xlink:to="lab_bokf_RevolvingPeriodforHomeEquityLoans_A98B8BC13E23317B2613C625F14ED53A" xlink:type="arc" />
    <link:label id="lab_bokf_AmortizationPeriodFollowingRevolvingPeriodforHomeEquityLoans_4CE59AF5E64ABF9ADFF6C625F14EE078_terseLabel_en-US" xlink:label="lab_bokf_AmortizationPeriodFollowingRevolvingPeriodforHomeEquityLoans_4CE59AF5E64ABF9ADFF6C625F14EE078" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Home equity loans, amortization period following revolving period</link:label>
    <link:label id="lab_bokf_AmortizationPeriodFollowingRevolvingPeriodforHomeEquityLoans_4CE59AF5E64ABF9ADFF6C625F14EE078_label_en-US" xlink:label="lab_bokf_AmortizationPeriodFollowingRevolvingPeriodforHomeEquityLoans_4CE59AF5E64ABF9ADFF6C625F14EE078" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization Period Following Revolving Period for Home Equity Loans</link:label>
    <link:label id="lab_bokf_AmortizationPeriodFollowingRevolvingPeriodforHomeEquityLoans_4CE59AF5E64ABF9ADFF6C625F14EE078_documentation_en-US" xlink:label="lab_bokf_AmortizationPeriodFollowingRevolvingPeriodforHomeEquityLoans_4CE59AF5E64ABF9ADFF6C625F14EE078" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the amortization period of repayment following the revolving period for home equity loans.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_AmortizationPeriodFollowingRevolvingPeriodforHomeEquityLoans" xlink:label="loc_bokf_AmortizationPeriodFollowingRevolvingPeriodforHomeEquityLoans_4CE59AF5E64ABF9ADFF6C625F14EE078" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_AmortizationPeriodFollowingRevolvingPeriodforHomeEquityLoans_4CE59AF5E64ABF9ADFF6C625F14EE078" xlink:to="lab_bokf_AmortizationPeriodFollowingRevolvingPeriodforHomeEquityLoans_4CE59AF5E64ABF9ADFF6C625F14EE078" xlink:type="arc" />
    <link:label id="lab_bokf_HomeEquityLoansAdditionalDiscretionaryRevolvingPeriod_CB69A3E387A6710F5FE7C625F14EE6E2_terseLabel_en-US" xlink:label="lab_bokf_HomeEquityLoansAdditionalDiscretionaryRevolvingPeriod_CB69A3E387A6710F5FE7C625F14EE6E2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Home equity loans, discretionary additional revolving period</link:label>
    <link:label id="lab_bokf_HomeEquityLoansAdditionalDiscretionaryRevolvingPeriod_CB69A3E387A6710F5FE7C625F14EE6E2_label_en-US" xlink:label="lab_bokf_HomeEquityLoansAdditionalDiscretionaryRevolvingPeriod_CB69A3E387A6710F5FE7C625F14EE6E2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Home Equity Loans, Additional Discretionary Revolving Period</link:label>
    <link:label id="lab_bokf_HomeEquityLoansAdditionalDiscretionaryRevolvingPeriod_CB69A3E387A6710F5FE7C625F14EE6E2_documentation_en-US" xlink:label="lab_bokf_HomeEquityLoansAdditionalDiscretionaryRevolvingPeriod_CB69A3E387A6710F5FE7C625F14EE6E2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents additional revolving period that may be extended at the discretion of management following the initial revolving period for home equity loans.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_HomeEquityLoansAdditionalDiscretionaryRevolvingPeriod" xlink:label="loc_bokf_HomeEquityLoansAdditionalDiscretionaryRevolvingPeriod_CB69A3E387A6710F5FE7C625F14EE6E2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_HomeEquityLoansAdditionalDiscretionaryRevolvingPeriod_CB69A3E387A6710F5FE7C625F14EE6E2" xlink:to="lab_bokf_HomeEquityLoansAdditionalDiscretionaryRevolvingPeriod_CB69A3E387A6710F5FE7C625F14EE6E2" xlink:type="arc" />
    <link:label id="lab_bokf_CreditCommitmentsAbstract_7AFF5D7C603D7CF89783C625F14EC85C_terseLabel_en-US" xlink:label="lab_bokf_CreditCommitmentsAbstract_7AFF5D7C603D7CF89783C625F14EC85C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit Commitments [Abstract]</link:label>
    <link:label id="lab_bokf_CreditCommitmentsAbstract_7AFF5D7C603D7CF89783C625F14EC85C_label_en-US" xlink:label="lab_bokf_CreditCommitmentsAbstract_7AFF5D7C603D7CF89783C625F14EC85C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit Commitments [Abstract]</link:label>
    <link:label id="lab_bokf_CreditCommitmentsAbstract_7AFF5D7C603D7CF89783C625F14EC85C_documentation_en-US" xlink:label="lab_bokf_CreditCommitmentsAbstract_7AFF5D7C603D7CF89783C625F14EC85C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CreditCommitmentsAbstract" xlink:label="loc_bokf_CreditCommitmentsAbstract_7AFF5D7C603D7CF89783C625F14EC85C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CreditCommitmentsAbstract_7AFF5D7C603D7CF89783C625F14EC85C" xlink:to="lab_bokf_CreditCommitmentsAbstract_7AFF5D7C603D7CF89783C625F14EC85C" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnusedCommitmentsToExtendCredit_C6A078A6262BF2DE67CAC625F14E4339_verboseLabel_en-US" xlink:label="lab_us-gaap_UnusedCommitmentsToExtendCredit_C6A078A6262BF2DE67CAC625F14E4339" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Outstanding commitments to extend credit</link:label>
    <link:label id="lab_us-gaap_UnusedCommitmentsToExtendCredit_C6A078A6262BF2DE67CAC625F14E4339_label_en-US" xlink:label="lab_us-gaap_UnusedCommitmentsToExtendCredit_C6A078A6262BF2DE67CAC625F14E4339" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unused Commitments to Extend Credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnusedCommitmentsToExtendCredit" xlink:label="loc_us-gaap_UnusedCommitmentsToExtendCredit_C6A078A6262BF2DE67CAC625F14E4339" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnusedCommitmentsToExtendCredit_C6A078A6262BF2DE67CAC625F14E4339" xlink:to="lab_us-gaap_UnusedCommitmentsToExtendCredit_C6A078A6262BF2DE67CAC625F14E4339" xlink:type="arc" />
    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_56B161D8037F617D4954C625F14E99B4_terseLabel_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount_56B161D8037F617D4954C625F14E99B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding standby letters of credit</link:label>
    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_56B161D8037F617D4954C625F14E99B4_label_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount_56B161D8037F617D4954C625F14E99B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letters of Credit Outstanding, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_56B161D8037F617D4954C625F14E99B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LettersOfCreditOutstandingAmount_56B161D8037F617D4954C625F14E99B4" xlink:to="lab_us-gaap_LettersOfCreditOutstandingAmount_56B161D8037F617D4954C625F14E99B4" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueMeasurementMeasuredOnNonRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_A1BF678D56FA93BAF0DBC5C6FD176AF1_label_en-US" xlink:label="lab_bokf_FairValueMeasurementMeasuredOnNonRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_A1BF678D56FA93BAF0DBC5C6FD176AF1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurement, Measured On Non-Recurring Basis, Significant Unobservable Inputs, Quantitative Information [Abstract]</link:label>
    <link:label id="lab_bokf_FairValueMeasurementMeasuredOnNonRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_A1BF678D56FA93BAF0DBC5C6FD176AF1_documentation_en-US" xlink:label="lab_bokf_FairValueMeasurementMeasuredOnNonRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_A1BF678D56FA93BAF0DBC5C6FD176AF1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value Measurement, Measured On Non-Recurring Basis, Significant Unobservable Inputs, Quantitative Information [Abstract]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueMeasurementMeasuredOnNonRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract" xlink:label="loc_bokf_FairValueMeasurementMeasuredOnNonRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_A1BF678D56FA93BAF0DBC5C6FD176AF1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueMeasurementMeasuredOnNonRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_A1BF678D56FA93BAF0DBC5C6FD176AF1" xlink:to="lab_bokf_FairValueMeasurementMeasuredOnNonRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_A1BF678D56FA93BAF0DBC5C6FD176AF1" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_FA94805EF002CE7E4AAEC5C6FD17530C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_FA94805EF002CE7E4AAEC5C6FD17530C" 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_FA94805EF002CE7E4AAEC5C6FD17530C_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_FA94805EF002CE7E4AAEC5C6FD17530C" 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_FA94805EF002CE7E4AAEC5C6FD17530C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_FA94805EF002CE7E4AAEC5C6FD17530C" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_FA94805EF002CE7E4AAEC5C6FD17530C" xlink:type="arc" />
    <link:label id="lab_srt_RangeAxis_C0620573620909920EBAC5C6FD17B9B5_terseLabel_en-US" xlink:label="lab_srt_RangeAxis_C0620573620909920EBAC5C6FD17B9B5" 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_C0620573620909920EBAC5C6FD17B9B5_label_en-US" xlink:label="lab_srt_RangeAxis_C0620573620909920EBAC5C6FD17B9B5" 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_C0620573620909920EBAC5C6FD17B9B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeAxis_C0620573620909920EBAC5C6FD17B9B5" xlink:to="lab_srt_RangeAxis_C0620573620909920EBAC5C6FD17B9B5" xlink:type="arc" />
    <link:label id="lab_srt_RangeMember_635285C0EA9020DC43AAC5C6FD186D3F_terseLabel_en-US" xlink:label="lab_srt_RangeMember_635285C0EA9020DC43AAC5C6FD186D3F" 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_635285C0EA9020DC43AAC5C6FD186D3F_label_en-US" xlink:label="lab_srt_RangeMember_635285C0EA9020DC43AAC5C6FD186D3F" 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_635285C0EA9020DC43AAC5C6FD186D3F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_RangeMember_635285C0EA9020DC43AAC5C6FD186D3F" xlink:to="lab_srt_RangeMember_635285C0EA9020DC43AAC5C6FD186D3F" xlink:type="arc" />
    <link:label id="lab_srt_MinimumMember_C764DA5B21B7B802D9F9C5C6FD18ACD4_terseLabel_en-US" xlink:label="lab_srt_MinimumMember_C764DA5B21B7B802D9F9C5C6FD18ACD4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum [Member]</link:label>
    <link:label id="lab_srt_MinimumMember_C764DA5B21B7B802D9F9C5C6FD18ACD4_label_en-US" xlink:label="lab_srt_MinimumMember_C764DA5B21B7B802D9F9C5C6FD18ACD4" 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_C764DA5B21B7B802D9F9C5C6FD18ACD4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MinimumMember_C764DA5B21B7B802D9F9C5C6FD18ACD4" xlink:to="lab_srt_MinimumMember_C764DA5B21B7B802D9F9C5C6FD18ACD4" xlink:type="arc" />
    <link:label id="lab_srt_MaximumMember_61C108B5D51329614083C5C6FD18A40D_terseLabel_en-US" xlink:label="lab_srt_MaximumMember_61C108B5D51329614083C5C6FD18A40D" 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_61C108B5D51329614083C5C6FD18A40D_label_en-US" xlink:label="lab_srt_MaximumMember_61C108B5D51329614083C5C6FD18A40D" 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_61C108B5D51329614083C5C6FD18A40D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MaximumMember_61C108B5D51329614083C5C6FD18A40D" xlink:to="lab_srt_MaximumMember_61C108B5D51329614083C5C6FD18A40D" xlink:type="arc" />
    <link:label id="lab_srt_WeightedAverageMember_82F5E804B48EFEC26FE1C5C6FD1853CC_terseLabel_en-US" xlink:label="lab_srt_WeightedAverageMember_82F5E804B48EFEC26FE1C5C6FD1853CC" 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_82F5E804B48EFEC26FE1C5C6FD1853CC_label_en-US" xlink:label="lab_srt_WeightedAverageMember_82F5E804B48EFEC26FE1C5C6FD1853CC" 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_82F5E804B48EFEC26FE1C5C6FD1853CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_WeightedAverageMember_82F5E804B48EFEC26FE1C5C6FD1853CC" xlink:to="lab_srt_WeightedAverageMember_82F5E804B48EFEC26FE1C5C6FD1853CC" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByMeasurementFrequencyAxis_A82E4C03FA06C4F38438C5C6FD1937F4_verboseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementFrequencyAxis_A82E4C03FA06C4F38438C5C6FD1937F4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" 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_A82E4C03FA06C4F38438C5C6FD1937F4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_A82E4C03FA06C4F38438C5C6FD1937F4" xlink:to="lab_us-gaap_FairValueByMeasurementFrequencyAxis_A82E4C03FA06C4F38438C5C6FD1937F4" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_35B1FE595400567981A5C5C6FD1C5F19_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_35B1FE595400567981A5C5C6FD1C5F19" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Measurement Inputs and Valuation Techniques [Line Items]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_35B1FE595400567981A5C5C6FD1C5F19_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_35B1FE595400567981A5C5C6FD1C5F19" 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_35B1FE595400567981A5C5C6FD1C5F19" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_35B1FE595400567981A5C5C6FD1C5F19" xlink:to="lab_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_35B1FE595400567981A5C5C6FD1C5F19" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueofImpairedLoansasPercentageofUnpaidPrincipalBalance_0C57CFE05C1117C8A47BC5C6FD1D69BE_terseLabel_en-US" xlink:label="lab_bokf_FairValueofImpairedLoansasPercentageofUnpaidPrincipalBalance_0C57CFE05C1117C8A47BC5C6FD1D69BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance</link:label>
    <link:label id="lab_bokf_FairValueofImpairedLoansasPercentageofUnpaidPrincipalBalance_0C57CFE05C1117C8A47BC5C6FD1D69BE_label_en-US" xlink:label="lab_bokf_FairValueofImpairedLoansasPercentageofUnpaidPrincipalBalance_0C57CFE05C1117C8A47BC5C6FD1D69BE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance</link:label>
    <link:label id="lab_bokf_FairValueofImpairedLoansasPercentageofUnpaidPrincipalBalance_0C57CFE05C1117C8A47BC5C6FD1D69BE_documentation_en-US" xlink:label="lab_bokf_FairValueofImpairedLoansasPercentageofUnpaidPrincipalBalance_0C57CFE05C1117C8A47BC5C6FD1D69BE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value of Impaired Loans as Percentage of Unpaid Principal Balance</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueofImpairedLoansasPercentageofUnpaidPrincipalBalance" xlink:label="loc_bokf_FairValueofImpairedLoansasPercentageofUnpaidPrincipalBalance_0C57CFE05C1117C8A47BC5C6FD1D69BE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueofImpairedLoansasPercentageofUnpaidPrincipalBalance_0C57CFE05C1117C8A47BC5C6FD1D69BE" xlink:to="lab_bokf_FairValueofImpairedLoansasPercentageofUnpaidPrincipalBalance_0C57CFE05C1117C8A47BC5C6FD1D69BE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9328F596F729580FF845C5654BCE4AF6_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9328F596F729580FF845C5654BCE4AF6" 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_9328F596F729580FF845C5654BCE4AF6_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9328F596F729580FF845C5654BCE4AF6" 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_9328F596F729580FF845C5654BCE4AF6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9328F596F729580FF845C5654BCE4AF6" xlink:to="lab_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_9328F596F729580FF845C5654BCE4AF6" xlink:type="arc" />
    <link:label id="lab_us-gaap_PerformingFinancingReceivableMember_ABB2C923A9278409FA0EC5654BCF33C8_terseLabel_en-US" xlink:label="lab_us-gaap_PerformingFinancingReceivableMember_ABB2C923A9278409FA0EC5654BCF33C8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Performing [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PerformingFinancingReceivableMember" xlink:label="loc_us-gaap_PerformingFinancingReceivableMember_ABB2C923A9278409FA0EC5654BCF33C8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PerformingFinancingReceivableMember_ABB2C923A9278409FA0EC5654BCF33C8" xlink:to="lab_us-gaap_PerformingFinancingReceivableMember_ABB2C923A9278409FA0EC5654BCF33C8" xlink:type="arc" />
    <link:label id="lab_us-gaap_NonperformingFinancingReceivableMember_87E8EEE69DFCD246423BC5654BCF0DED_terseLabel_en-US" xlink:label="lab_us-gaap_NonperformingFinancingReceivableMember_87E8EEE69DFCD246423BC5654BCF0DED" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nonaccrual [Member]</link:label>
    <link:label id="lab_us-gaap_NonperformingFinancingReceivableMember_87E8EEE69DFCD246423BC5654BCF0DED_label_en-US" xlink:label="lab_us-gaap_NonperformingFinancingReceivableMember_87E8EEE69DFCD246423BC5654BCF0DED" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nonperforming Financial Instruments [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonperformingFinancingReceivableMember" xlink:label="loc_us-gaap_NonperformingFinancingReceivableMember_87E8EEE69DFCD246423BC5654BCF0DED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NonperformingFinancingReceivableMember_87E8EEE69DFCD246423BC5654BCF0DED" xlink:to="lab_us-gaap_NonperformingFinancingReceivableMember_87E8EEE69DFCD246423BC5654BCF0DED" xlink:type="arc" />
    <link:label id="lab_us-gaap_InternalCreditAssessmentAxis_0C4FF3347FC9332B19E0C5654BCFC285_terseLabel_en-US" xlink:label="lab_us-gaap_InternalCreditAssessmentAxis_0C4FF3347FC9332B19E0C5654BCFC285" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Internal Credit Assessment [Axis]</link:label>
    <link:label id="lab_us-gaap_InternalCreditAssessmentAxis_0C4FF3347FC9332B19E0C5654BCFC285_label_en-US" xlink:label="lab_us-gaap_InternalCreditAssessmentAxis_0C4FF3347FC9332B19E0C5654BCFC285" 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_0C4FF3347FC9332B19E0C5654BCFC285" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_0C4FF3347FC9332B19E0C5654BCFC285" xlink:to="lab_us-gaap_InternalCreditAssessmentAxis_0C4FF3347FC9332B19E0C5654BCFC285" xlink:type="arc" />
    <link:label id="lab_us-gaap_InternalCreditAssessmentDomain_1598AED6621473A94B75C5654BCF30D4_terseLabel_en-US" xlink:label="lab_us-gaap_InternalCreditAssessmentDomain_1598AED6621473A94B75C5654BCF30D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Internal Credit Assessment [Domain]</link:label>
    <link:label id="lab_us-gaap_InternalCreditAssessmentDomain_1598AED6621473A94B75C5654BCF30D4_label_en-US" xlink:label="lab_us-gaap_InternalCreditAssessmentDomain_1598AED6621473A94B75C5654BCF30D4" 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_1598AED6621473A94B75C5654BCF30D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_1598AED6621473A94B75C5654BCF30D4" xlink:to="lab_us-gaap_InternalCreditAssessmentDomain_1598AED6621473A94B75C5654BCF30D4" xlink:type="arc" />
    <link:label id="lab_us-gaap_PassMember_E595EF5A788B74C5756FC5654BD05120_terseLabel_en-US" xlink:label="lab_us-gaap_PassMember_E595EF5A788B74C5756FC5654BD05120" 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_E595EF5A788B74C5756FC5654BD05120_label_en-US" xlink:label="lab_us-gaap_PassMember_E595EF5A788B74C5756FC5654BD05120" 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_E595EF5A788B74C5756FC5654BD05120" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PassMember_E595EF5A788B74C5756FC5654BD05120" xlink:to="lab_us-gaap_PassMember_E595EF5A788B74C5756FC5654BD05120" xlink:type="arc" />
    <link:label id="lab_us-gaap_SpecialMentionMember_BC0CABBE6889B2D3CABBC5654BD00D03_terseLabel_en-US" xlink:label="lab_us-gaap_SpecialMentionMember_BC0CABBE6889B2D3CABBC5654BD00D03" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other Loans Especially Mentioned [Member]</link:label>
    <link:label id="lab_us-gaap_SpecialMentionMember_BC0CABBE6889B2D3CABBC5654BD00D03_label_en-US" xlink:label="lab_us-gaap_SpecialMentionMember_BC0CABBE6889B2D3CABBC5654BD00D03" 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_BC0CABBE6889B2D3CABBC5654BD00D03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SpecialMentionMember_BC0CABBE6889B2D3CABBC5654BD00D03" xlink:to="lab_us-gaap_SpecialMentionMember_BC0CABBE6889B2D3CABBC5654BD00D03" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubstandardMember_B11477E23C3985ED24CBC5654BD05A0C_terseLabel_en-US" xlink:label="lab_us-gaap_SubstandardMember_B11477E23C3985ED24CBC5654BD05A0C" 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_B11477E23C3985ED24CBC5654BD05A0C_label_en-US" xlink:label="lab_us-gaap_SubstandardMember_B11477E23C3985ED24CBC5654BD05A0C" 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_B11477E23C3985ED24CBC5654BD05A0C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubstandardMember_B11477E23C3985ED24CBC5654BD05A0C" xlink:to="lab_us-gaap_SubstandardMember_B11477E23C3985ED24CBC5654BD05A0C" xlink:type="arc" />
    <link:label id="lab_bokf_SpecificAllowanceMember_21F8E665679B69776876C5654BD19E91_terseLabel_en-US" xlink:label="lab_bokf_SpecificAllowanceMember_21F8E665679B69776876C5654BD19E91" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Specific Allowance [Member]</link:label>
    <link:label id="lab_bokf_SpecificAllowanceMember_21F8E665679B69776876C5654BD19E91_label_en-US" xlink:label="lab_bokf_SpecificAllowanceMember_21F8E665679B69776876C5654BD19E91" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Specific Allowance [Member]</link:label>
    <link:label id="lab_bokf_SpecificAllowanceMember_21F8E665679B69776876C5654BD19E91_documentation_en-US" xlink:label="lab_bokf_SpecificAllowanceMember_21F8E665679B69776876C5654BD19E91" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Financing receivables and related allowance that have been spefically allocated to a portfolio segment.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_SpecificAllowanceMember" xlink:label="loc_bokf_SpecificAllowanceMember_21F8E665679B69776876C5654BD19E91" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_SpecificAllowanceMember_21F8E665679B69776876C5654BD19E91" xlink:to="lab_bokf_SpecificAllowanceMember_21F8E665679B69776876C5654BD19E91" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnallocatedFinancingReceivablesMember_9FFF1C56A702161D93D2C5654BD162B0_terseLabel_en-US" xlink:label="lab_us-gaap_UnallocatedFinancingReceivablesMember_9FFF1C56A702161D93D2C5654BD162B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nonspecific Allowance [Member]</link:label>
    <link:label id="lab_us-gaap_UnallocatedFinancingReceivablesMember_9FFF1C56A702161D93D2C5654BD162B0_label_en-US" xlink:label="lab_us-gaap_UnallocatedFinancingReceivablesMember_9FFF1C56A702161D93D2C5654BD162B0" 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_9FFF1C56A702161D93D2C5654BD162B0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnallocatedFinancingReceivablesMember_9FFF1C56A702161D93D2C5654BD162B0" xlink:to="lab_us-gaap_UnallocatedFinancingReceivablesMember_9FFF1C56A702161D93D2C5654BD162B0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentLineItems_7CF34A3AA0952615EDD7C5654BD509F7_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentLineItems_7CF34A3AA0952615EDD7C5654BD509F7" 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_7CF34A3AA0952615EDD7C5654BD509F7_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentLineItems_7CF34A3AA0952615EDD7C5654BD509F7" 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_7CF34A3AA0952615EDD7C5654BD509F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_7CF34A3AA0952615EDD7C5654BD509F7" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentLineItems_7CF34A3AA0952615EDD7C5654BD509F7" xlink:type="arc" />
    <link:label id="lab_bokf_RecordedInvestmentAbstract_C6C12C6A326CCBD6E8EFC5654BD5D199_terseLabel_en-US" xlink:label="lab_bokf_RecordedInvestmentAbstract_C6C12C6A326CCBD6E8EFC5654BD5D199" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recorded Investment [Abstract]</link:label>
    <link:label id="lab_bokf_RecordedInvestmentAbstract_C6C12C6A326CCBD6E8EFC5654BD5D199_label_en-US" xlink:label="lab_bokf_RecordedInvestmentAbstract_C6C12C6A326CCBD6E8EFC5654BD5D199" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recorded Investment [Abstract]</link:label>
    <link:label id="lab_bokf_RecordedInvestmentAbstract_C6C12C6A326CCBD6E8EFC5654BD5D199_documentation_en-US" xlink:label="lab_bokf_RecordedInvestmentAbstract_C6C12C6A326CCBD6E8EFC5654BD5D199" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_RecordedInvestmentAbstract" xlink:label="loc_bokf_RecordedInvestmentAbstract_C6C12C6A326CCBD6E8EFC5654BD5D199" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_RecordedInvestmentAbstract_C6C12C6A326CCBD6E8EFC5654BD5D199" xlink:to="lab_bokf_RecordedInvestmentAbstract_C6C12C6A326CCBD6E8EFC5654BD5D199" xlink:type="arc" />
    <link:label id="lab_bokf_InternallyRiskGradedRecordedInvestment_DBECC81673BBDDE0AB17C5654BD5BDF4_terseLabel_en-US" xlink:label="lab_bokf_InternallyRiskGradedRecordedInvestment_DBECC81673BBDDE0AB17C5654BD5BDF4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Internally Risk Graded, Recorded Investment</link:label>
    <link:label id="lab_bokf_InternallyRiskGradedRecordedInvestment_DBECC81673BBDDE0AB17C5654BD5BDF4_label_en-US" xlink:label="lab_bokf_InternallyRiskGradedRecordedInvestment_DBECC81673BBDDE0AB17C5654BD5BDF4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Internally Risk Graded, Recorded Investment</link:label>
    <link:label id="lab_bokf_InternallyRiskGradedRecordedInvestment_DBECC81673BBDDE0AB17C5654BD5BDF4_documentation_en-US" xlink:label="lab_bokf_InternallyRiskGradedRecordedInvestment_DBECC81673BBDDE0AB17C5654BD5BDF4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of the recorded investment, that is internally risk graded on credit quality, in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InternallyRiskGradedRecordedInvestment" xlink:label="loc_bokf_InternallyRiskGradedRecordedInvestment_DBECC81673BBDDE0AB17C5654BD5BDF4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InternallyRiskGradedRecordedInvestment_DBECC81673BBDDE0AB17C5654BD5BDF4" xlink:to="lab_bokf_InternallyRiskGradedRecordedInvestment_DBECC81673BBDDE0AB17C5654BD5BDF4" xlink:type="arc" />
    <link:label id="lab_bokf_NonGradedRecordedInvestment_11265E4067F5AAE76D48C5654BD53868_terseLabel_en-US" xlink:label="lab_bokf_NonGradedRecordedInvestment_11265E4067F5AAE76D48C5654BD53868" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Graded, Recorded Investment</link:label>
    <link:label id="lab_bokf_NonGradedRecordedInvestment_11265E4067F5AAE76D48C5654BD53868_label_en-US" xlink:label="lab_bokf_NonGradedRecordedInvestment_11265E4067F5AAE76D48C5654BD53868" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Graded, Recorded Investment</link:label>
    <link:label id="lab_bokf_NonGradedRecordedInvestment_11265E4067F5AAE76D48C5654BD53868_documentation_en-US" xlink:label="lab_bokf_NonGradedRecordedInvestment_11265E4067F5AAE76D48C5654BD53868" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of the recorded investment, for which risk grading is not used to monitor credit quality, in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. These represent small homogeneous pools primarily composed of residential and consumers as well as certain commercial loans.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NonGradedRecordedInvestment" xlink:label="loc_bokf_NonGradedRecordedInvestment_11265E4067F5AAE76D48C5654BD53868" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NonGradedRecordedInvestment_11265E4067F5AAE76D48C5654BD53868" xlink:to="lab_bokf_NonGradedRecordedInvestment_11265E4067F5AAE76D48C5654BD53868" xlink:type="arc" />
    <link:label id="lab_bokf_RelatedAllowanceAbstract_6A534E03D3F94841F22FC5654BD6295C_terseLabel_en-US" xlink:label="lab_bokf_RelatedAllowanceAbstract_6A534E03D3F94841F22FC5654BD6295C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Allowance [Abstract]</link:label>
    <link:label id="lab_bokf_RelatedAllowanceAbstract_6A534E03D3F94841F22FC5654BD6295C_label_en-US" xlink:label="lab_bokf_RelatedAllowanceAbstract_6A534E03D3F94841F22FC5654BD6295C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Allowance [Abstract]</link:label>
    <link:label id="lab_bokf_RelatedAllowanceAbstract_6A534E03D3F94841F22FC5654BD6295C_documentation_en-US" xlink:label="lab_bokf_RelatedAllowanceAbstract_6A534E03D3F94841F22FC5654BD6295C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_RelatedAllowanceAbstract" xlink:label="loc_bokf_RelatedAllowanceAbstract_6A534E03D3F94841F22FC5654BD6295C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_RelatedAllowanceAbstract_6A534E03D3F94841F22FC5654BD6295C" xlink:to="lab_bokf_RelatedAllowanceAbstract_6A534E03D3F94841F22FC5654BD6295C" xlink:type="arc" />
    <link:label id="lab_bokf_InternallyRiskGradedAllowance_5E4703F0F10D9AF02EDEC5654BD65687_terseLabel_en-US" xlink:label="lab_bokf_InternallyRiskGradedAllowance_5E4703F0F10D9AF02EDEC5654BD65687" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Internally Risk Graded, Allowance</link:label>
    <link:label id="lab_bokf_InternallyRiskGradedAllowance_5E4703F0F10D9AF02EDEC5654BD65687_label_en-US" xlink:label="lab_bokf_InternallyRiskGradedAllowance_5E4703F0F10D9AF02EDEC5654BD65687" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Internally Risk Graded, Allowance</link:label>
    <link:label id="lab_bokf_InternallyRiskGradedAllowance_5E4703F0F10D9AF02EDEC5654BD65687_documentation_en-US" xlink:label="lab_bokf_InternallyRiskGradedAllowance_5E4703F0F10D9AF02EDEC5654BD65687" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of the allowance for credit losses on recorded investment, that is internally risk graded, in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InternallyRiskGradedAllowance" xlink:label="loc_bokf_InternallyRiskGradedAllowance_5E4703F0F10D9AF02EDEC5654BD65687" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InternallyRiskGradedAllowance_5E4703F0F10D9AF02EDEC5654BD65687" xlink:to="lab_bokf_InternallyRiskGradedAllowance_5E4703F0F10D9AF02EDEC5654BD65687" xlink:type="arc" />
    <link:label id="lab_bokf_NonGradedAllowance_B0AA3936C0357BD68649C5654BD6563D_terseLabel_en-US" xlink:label="lab_bokf_NonGradedAllowance_B0AA3936C0357BD68649C5654BD6563D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Graded, Allowance</link:label>
    <link:label id="lab_bokf_NonGradedAllowance_B0AA3936C0357BD68649C5654BD6563D_label_en-US" xlink:label="lab_bokf_NonGradedAllowance_B0AA3936C0357BD68649C5654BD6563D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-Graded, Allowance</link:label>
    <link:label id="lab_bokf_NonGradedAllowance_B0AA3936C0357BD68649C5654BD6563D_documentation_en-US" xlink:label="lab_bokf_NonGradedAllowance_B0AA3936C0357BD68649C5654BD6563D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount of the allowance for credit losses on recorded investment that is not internally risk graded, in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NonGradedAllowance" xlink:label="loc_bokf_NonGradedAllowance_B0AA3936C0357BD68649C5654BD6563D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NonGradedAllowance_B0AA3936C0357BD68649C5654BD6563D" xlink:to="lab_bokf_NonGradedAllowance_B0AA3936C0357BD68649C5654BD6563D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowance_8BCE138C5C79BCE3E5CFC5654BD691DD_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowance_8BCE138C5C79BCE3E5CFC5654BD691DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total</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_8BCE138C5C79BCE3E5CFC5654BD691DD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowance_8BCE138C5C79BCE3E5CFC5654BD691DD" xlink:to="lab_us-gaap_LoansAndLeasesReceivableAllowance_8BCE138C5C79BCE3E5CFC5654BD691DD" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityNoteAbstract_CF88FC5EFC7EC8E723C6C5654B4F975B_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteAbstract_CF88FC5EFC7EC8E723C6C5654B4F975B" 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_CF88FC5EFC7EC8E723C6C5654B4F975B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityNoteAbstract_CF88FC5EFC7EC8E723C6C5654B4F975B" xlink:to="lab_us-gaap_StockholdersEquityNoteAbstract_CF88FC5EFC7EC8E723C6C5654B4F975B" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementTable_7D8A106E393F33BA7E6BC5654B4F2798_terseLabel_en-US" xlink:label="lab_us-gaap_StatementTable_7D8A106E393F33BA7E6BC5654B4F2798" 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_7D8A106E393F33BA7E6BC5654B4F2798_label_en-US" xlink:label="lab_us-gaap_StatementTable_7D8A106E393F33BA7E6BC5654B4F2798" 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_7D8A106E393F33BA7E6BC5654B4F2798" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementTable_7D8A106E393F33BA7E6BC5654B4F2798" xlink:to="lab_us-gaap_StatementTable_7D8A106E393F33BA7E6BC5654B4F2798" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTypeAxis_520BE29776E3F278CC29C5654B4F8626_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis_520BE29776E3F278CC29C5654B4F8626" 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_520BE29776E3F278CC29C5654B4F8626_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeAxis_520BE29776E3F278CC29C5654B4F8626" 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_520BE29776E3F278CC29C5654B4F8626" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_520BE29776E3F278CC29C5654B4F8626" xlink:to="lab_us-gaap_SubsequentEventTypeAxis_520BE29776E3F278CC29C5654B4F8626" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventTypeDomain_BF25A6143C4F2D37FECAC5654B50EF6D_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain_BF25A6143C4F2D37FECAC5654B50EF6D" 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_BF25A6143C4F2D37FECAC5654B50EF6D_label_en-US" xlink:label="lab_us-gaap_SubsequentEventTypeDomain_BF25A6143C4F2D37FECAC5654B50EF6D" 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_BF25A6143C4F2D37FECAC5654B50EF6D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_BF25A6143C4F2D37FECAC5654B50EF6D" xlink:to="lab_us-gaap_SubsequentEventTypeDomain_BF25A6143C4F2D37FECAC5654B50EF6D" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventMember_3F12D495D7B8F6AD462AC5654B50958B_terseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventMember_3F12D495D7B8F6AD462AC5654B50958B" 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_3F12D495D7B8F6AD462AC5654B50958B_label_en-US" xlink:label="lab_us-gaap_SubsequentEventMember_3F12D495D7B8F6AD462AC5654B50958B" 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_3F12D495D7B8F6AD462AC5654B50958B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventMember_3F12D495D7B8F6AD462AC5654B50958B" xlink:to="lab_us-gaap_SubsequentEventMember_3F12D495D7B8F6AD462AC5654B50958B" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementEquityComponentsAxis_F7DC0710E0C28357C38DC5654B50E36F_terseLabel_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis_F7DC0710E0C28357C38DC5654B50E36F" 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_F7DC0710E0C28357C38DC5654B50E36F_label_en-US" xlink:label="lab_us-gaap_StatementEquityComponentsAxis_F7DC0710E0C28357C38DC5654B50E36F" 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_F7DC0710E0C28357C38DC5654B50E36F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_F7DC0710E0C28357C38DC5654B50E36F" xlink:to="lab_us-gaap_StatementEquityComponentsAxis_F7DC0710E0C28357C38DC5654B50E36F" xlink:type="arc" />
    <link:label id="lab_us-gaap_EquityComponentDomain_9E9EB113797ED783996FC5654B500497_terseLabel_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_9E9EB113797ED783996FC5654B500497" 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_9E9EB113797ED783996FC5654B500497_label_en-US" xlink:label="lab_us-gaap_EquityComponentDomain_9E9EB113797ED783996FC5654B500497" 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_9E9EB113797ED783996FC5654B500497" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EquityComponentDomain_9E9EB113797ED783996FC5654B500497" xlink:to="lab_us-gaap_EquityComponentDomain_9E9EB113797ED783996FC5654B500497" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_05F0BF594A24F282BA6BC5654B5157FA_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_05F0BF594A24F282BA6BC5654B5157FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_05F0BF594A24F282BA6BC5654B5157FA_label_en-US" xlink:label="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_05F0BF594A24F282BA6BC5654B5157FA" 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_05F0BF594A24F282BA6BC5654B5157FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_05F0BF594A24F282BA6BC5654B5157FA" xlink:to="lab_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_05F0BF594A24F282BA6BC5654B5157FA" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_D3FA332B30B01C117B82C5654B51942D_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_D3FA332B30B01C117B82C5654B51942D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Unrealized Gain (Loss) on Employee Benefit Plans [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_D3FA332B30B01C117B82C5654B51942D_label_en-US" xlink:label="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_D3FA332B30B01C117B82C5654B51942D" 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_D3FA332B30B01C117B82C5654B51942D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_D3FA332B30B01C117B82C5654B51942D" xlink:to="lab_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_D3FA332B30B01C117B82C5654B51942D" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementLineItems_996FEE2D92ADC60D2A0DC5654B51FFC0_terseLabel_en-US" xlink:label="lab_us-gaap_StatementLineItems_996FEE2D92ADC60D2A0DC5654B51FFC0" 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_996FEE2D92ADC60D2A0DC5654B51FFC0_label_en-US" xlink:label="lab_us-gaap_StatementLineItems_996FEE2D92ADC60D2A0DC5654B51FFC0" 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_996FEE2D92ADC60D2A0DC5654B51FFC0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementLineItems_996FEE2D92ADC60D2A0DC5654B51FFC0" xlink:to="lab_us-gaap_StatementLineItems_996FEE2D92ADC60D2A0DC5654B51FFC0" xlink:type="arc" />
    <link:label id="lab_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_79174ADA38B96B36A2FBC5654B51922E_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_79174ADA38B96B36A2FBC5654B51922E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Payable, Date Declared</link:label>
    <link:label id="lab_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_79174ADA38B96B36A2FBC5654B51922E_label_en-US" xlink:label="lab_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_79174ADA38B96B36A2FBC5654B51922E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Payable, Date Declared</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableDateDeclaredDayMonthAndYear" xlink:label="loc_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_79174ADA38B96B36A2FBC5654B51922E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_79174ADA38B96B36A2FBC5654B51922E" xlink:to="lab_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_79174ADA38B96B36A2FBC5654B51922E" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_FFBB5B13EDEFB14F8228C5654B5150CB_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared_FFBB5B13EDEFB14F8228C5654B5150CB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends declared (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_FFBB5B13EDEFB14F8228C5654B5150CB_label_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared_FFBB5B13EDEFB14F8228C5654B5150CB" 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_FFBB5B13EDEFB14F8228C5654B5150CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockDividendsPerShareDeclared_FFBB5B13EDEFB14F8228C5654B5150CB" xlink:to="lab_us-gaap_CommonStockDividendsPerShareDeclared_FFBB5B13EDEFB14F8228C5654B5150CB" xlink:type="arc" />
    <link:label id="lab_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_6560DA07275CC7464840C5654B51FA6C_terseLabel_en-US" xlink:label="lab_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_6560DA07275CC7464840C5654B51FA6C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Payable, Date to be Paid</link:label>
    <link:label id="lab_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_6560DA07275CC7464840C5654B51FA6C_label_en-US" xlink:label="lab_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_6560DA07275CC7464840C5654B51FA6C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Payable, Date to be Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendPayableDateToBePaidDayMonthAndYear" xlink:label="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_6560DA07275CC7464840C5654B51FA6C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_6560DA07275CC7464840C5654B51FA6C" xlink:to="lab_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_6560DA07275CC7464840C5654B51FA6C" xlink:type="arc" />
    <link:label id="lab_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_C5A0B6474B1522C28892C5654B524AB5_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_C5A0B6474B1522C28892C5654B524AB5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Payable, Date of Record</link:label>
    <link:label id="lab_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_C5A0B6474B1522C28892C5654B524AB5_label_en-US" xlink:label="lab_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_C5A0B6474B1522C28892C5654B524AB5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Payable, Date of Record</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" xlink:label="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_C5A0B6474B1522C28892C5654B524AB5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_C5A0B6474B1522C28892C5654B524AB5" xlink:to="lab_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_C5A0B6474B1522C28892C5654B524AB5" xlink:type="arc" />
    <link:label id="lab_bokf_ScheduleOfAccumulatedOtherComprehensiveIncomeRollForward_66935A1E83BBDB58C2EBC5654B523D6E_verboseLabel_en-US" xlink:label="lab_bokf_ScheduleOfAccumulatedOtherComprehensiveIncomeRollForward_66935A1E83BBDB58C2EBC5654B523D6E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Accumulated Other Income (Loss) [Abstract]</link:label>
    <link:label id="lab_bokf_ScheduleOfAccumulatedOtherComprehensiveIncomeRollForward_66935A1E83BBDB58C2EBC5654B523D6E_label_en-US" xlink:label="lab_bokf_ScheduleOfAccumulatedOtherComprehensiveIncomeRollForward_66935A1E83BBDB58C2EBC5654B523D6E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Accumulated Other Comprehensive Income [Roll Forward]</link:label>
    <link:label id="lab_bokf_ScheduleOfAccumulatedOtherComprehensiveIncomeRollForward_66935A1E83BBDB58C2EBC5654B523D6E_documentation_en-US" xlink:label="lab_bokf_ScheduleOfAccumulatedOtherComprehensiveIncomeRollForward_66935A1E83BBDB58C2EBC5654B523D6E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ScheduleOfAccumulatedOtherComprehensiveIncomeRollForward" xlink:label="loc_bokf_ScheduleOfAccumulatedOtherComprehensiveIncomeRollForward_66935A1E83BBDB58C2EBC5654B523D6E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ScheduleOfAccumulatedOtherComprehensiveIncomeRollForward_66935A1E83BBDB58C2EBC5654B523D6E" xlink:to="lab_bokf_ScheduleOfAccumulatedOtherComprehensiveIncomeRollForward_66935A1E83BBDB58C2EBC5654B523D6E" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4DC722CDE0B514A39B93C5654B5298B9_periodStartLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4DC722CDE0B514A39B93C5654B5298B9" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance, 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_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4DC722CDE0B514A39B93C5654B5298B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4DC722CDE0B514A39B93C5654B5298B9" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_4DC722CDE0B514A39B93C5654B5298B9" xlink:type="arc" />
    <link:label id="lab_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_7FE75797EDC19B01E01DC5654B525016_terseLabel_en-US" xlink:label="lab_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_7FE75797EDC19B01E01DC5654B525016" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Transition adjustment for unrealized gains and losses on equity securities</link:label>
    <link:label id="lab_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_7FE75797EDC19B01E01DC5654B525016_label_en-US" xlink:label="lab_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_7FE75797EDC19B01E01DC5654B525016" 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_7FE75797EDC19B01E01DC5654B525016" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_7FE75797EDC19B01E01DC5654B525016" xlink:to="lab_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_7FE75797EDC19B01E01DC5654B525016" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_E7BF6811F583ACC242BAC5654B52EA18_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_E7BF6811F583ACC242BAC5654B52EA18" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net change in 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_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_E7BF6811F583ACC242BAC5654B52EA18" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_E7BF6811F583ACC242BAC5654B52EA18" xlink:to="lab_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_E7BF6811F583ACC242BAC5654B52EA18" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_6AC2916FD4ED5796C97FC5654B532BDC_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_6AC2916FD4ED5796C97FC5654B532BDC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss), 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_OtherComprehensiveIncomeLossBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_6AC2916FD4ED5796C97FC5654B532BDC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_6AC2916FD4ED5796C97FC5654B532BDC" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossBeforeTax_6AC2916FD4ED5796C97FC5654B532BDC" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_76670CC6A991E0288698C5654B538AFE_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_76670CC6A991E0288698C5654B538AFE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other comprehensive income (loss), net of income taxes</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_76670CC6A991E0288698C5654B538AFE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_76670CC6A991E0288698C5654B538AFE" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_76670CC6A991E0288698C5654B538AFE" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_22D4A2715E6C717AB70BC5654B544961_periodEndLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_22D4A2715E6C717AB70BC5654B544961" 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_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_22D4A2715E6C717AB70BC5654B544961" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_22D4A2715E6C717AB70BC5654B544961" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_22D4A2715E6C717AB70BC5654B544961" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_753AC64E899BA7E50655D47EA6BAFB7E_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract_753AC64E899BA7E50655D47EA6BAFB7E" 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_753AC64E899BA7E50655D47EA6BAFB7E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareAbstract_753AC64E899BA7E50655D47EA6BAFB7E" xlink:to="lab_us-gaap_EarningsPerShareAbstract_753AC64E899BA7E50655D47EA6BAFB7E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_50999E28CE0133B63CFFD47EA6BAAA3D_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_50999E28CE0133B63CFFD47EA6BAAA3D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_50999E28CE0133B63CFFD47EA6BAAA3D_label_en-US" xlink:label="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_50999E28CE0133B63CFFD47EA6BAAA3D" 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_50999E28CE0133B63CFFD47EA6BAAA3D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_50999E28CE0133B63CFFD47EA6BAAA3D" xlink:to="lab_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_50999E28CE0133B63CFFD47EA6BAAA3D" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeStatementAbstract_F26D74F9B1388CC35665C55BFCF18F3E_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract_F26D74F9B1388CC35665C55BFCF18F3E" 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_F26D74F9B1388CC35665C55BFCF18F3E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeStatementAbstract_F26D74F9B1388CC35665C55BFCF18F3E" xlink:to="lab_us-gaap_IncomeStatementAbstract_F26D74F9B1388CC35665C55BFCF18F3E" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeExpenseNetAbstract_66351322A49774899A6AC55BFCF1B339_terseLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNetAbstract_66351322A49774899A6AC55BFCF1B339" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest revenue [Abstract]</link:label>
    <link:label id="lab_us-gaap_InterestIncomeExpenseNetAbstract_66351322A49774899A6AC55BFCF1B339_label_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseNetAbstract_66351322A49774899A6AC55BFCF1B339" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income (Expense), Net [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeExpenseNetAbstract" xlink:label="loc_us-gaap_InterestIncomeExpenseNetAbstract_66351322A49774899A6AC55BFCF1B339" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeExpenseNetAbstract_66351322A49774899A6AC55BFCF1B339" xlink:to="lab_us-gaap_InterestIncomeExpenseNetAbstract_66351322A49774899A6AC55BFCF1B339" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio_69D62938E32D7EF56284C55BFCF1CA66_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio_69D62938E32D7EF56284C55BFCF1CA66" 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_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio_69D62938E32D7EF56284C55BFCF1CA66_label_en-US" xlink:label="lab_us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio_69D62938E32D7EF56284C55BFCF1CA66" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Fee Income, Loans and Leases Held-in-portfolio</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio_69D62938E32D7EF56284C55BFCF1CA66" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio_69D62938E32D7EF56284C55BFCF1CA66" xlink:to="lab_us-gaap_InterestAndFeeIncomeLoansAndLeasesHeldInPortfolio_69D62938E32D7EF56284C55BFCF1CA66" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndFeeIncomeLoansHeldForSaleMortgages_CEC940A6AD94823240F9C55BFCF13949_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestAndFeeIncomeLoansHeldForSaleMortgages_CEC940A6AD94823240F9C55BFCF13949" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Residential mortgage loans held for sale</link:label>
    <link:label id="lab_us-gaap_InterestAndFeeIncomeLoansHeldForSaleMortgages_CEC940A6AD94823240F9C55BFCF13949_label_en-US" xlink:label="lab_us-gaap_InterestAndFeeIncomeLoansHeldForSaleMortgages_CEC940A6AD94823240F9C55BFCF13949" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Fee Income, Loans Held-for-sale, Mortgages</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansHeldForSaleMortgages" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansHeldForSaleMortgages_CEC940A6AD94823240F9C55BFCF13949" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndFeeIncomeLoansHeldForSaleMortgages_CEC940A6AD94823240F9C55BFCF13949" xlink:to="lab_us-gaap_InterestAndFeeIncomeLoansHeldForSaleMortgages_CEC940A6AD94823240F9C55BFCF13949" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue_55B07E44FD6B4799A8FCC55BFCF1D6FB_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue_55B07E44FD6B4799A8FCC55BFCF1D6FB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Trading securities</link:label>
    <link:label id="lab_us-gaap_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue_55B07E44FD6B4799A8FCC55BFCF1D6FB_label_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue_55B07E44FD6B4799A8FCC55BFCF1D6FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Dividend Income, Securities, Operating, Trading or Measured 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_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue_55B07E44FD6B4799A8FCC55BFCF1D6FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue_55B07E44FD6B4799A8FCC55BFCF1D6FB" xlink:to="lab_us-gaap_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue_55B07E44FD6B4799A8FCC55BFCF1D6FB" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_4F1F1F9316523A38A77EC55BFCF10524_terseLabel_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_4F1F1F9316523A38A77EC55BFCF10524" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment securities</link:label>
    <link:label id="lab_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_4F1F1F9316523A38A77EC55BFCF10524_label_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_4F1F1F9316523A38A77EC55BFCF10524" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Income, Debt Securities, Held-to-maturity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_4F1F1F9316523A38A77EC55BFCF10524" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_4F1F1F9316523A38A77EC55BFCF10524" xlink:to="lab_us-gaap_InterestAndDividendIncomeSecuritiesHeldToMaturity_4F1F1F9316523A38A77EC55BFCF10524" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale_5094F4A0220AC42BEFF7C55BFCF17538_terseLabel_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale_5094F4A0220AC42BEFF7C55BFCF17538" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Available for sale securities</link:label>
    <link:label id="lab_us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale_5094F4A0220AC42BEFF7C55BFCF17538_label_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale_5094F4A0220AC42BEFF7C55BFCF17538" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest and Dividend Income, Securities, Operating, 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_InterestAndDividendIncomeSecuritiesAvailableForSale" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale_5094F4A0220AC42BEFF7C55BFCF17538" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale_5094F4A0220AC42BEFF7C55BFCF17538" xlink:to="lab_us-gaap_InterestAndDividendIncomeSecuritiesAvailableForSale_5094F4A0220AC42BEFF7C55BFCF17538" xlink:type="arc" />
    <link:label id="lab_bokf_InterestRevenueOnFairValueOptionSecurities_A2FACA041C475F0CCF79C55BFCF16F29_verboseLabel_en-US" xlink:label="lab_bokf_InterestRevenueOnFairValueOptionSecurities_A2FACA041C475F0CCF79C55BFCF16F29" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Fair value option securities</link:label>
    <link:label id="lab_bokf_InterestRevenueOnFairValueOptionSecurities_A2FACA041C475F0CCF79C55BFCF16F29_label_en-US" xlink:label="lab_bokf_InterestRevenueOnFairValueOptionSecurities_A2FACA041C475F0CCF79C55BFCF16F29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest revenue on fair value option securities</link:label>
    <link:label id="lab_bokf_InterestRevenueOnFairValueOptionSecurities_A2FACA041C475F0CCF79C55BFCF16F29_documentation_en-US" xlink:label="lab_bokf_InterestRevenueOnFairValueOptionSecurities_A2FACA041C475F0CCF79C55BFCF16F29" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest income from fair value option securities that the Company has elected to carry at fair value and separately identify in the Consolidated Balance Sheets with changes in the fair value recognized in earnings as they occur.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InterestRevenueOnFairValueOptionSecurities" xlink:label="loc_bokf_InterestRevenueOnFairValueOptionSecurities_A2FACA041C475F0CCF79C55BFCF16F29" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InterestRevenueOnFairValueOptionSecurities_A2FACA041C475F0CCF79C55BFCF16F29" xlink:to="lab_bokf_InterestRevenueOnFairValueOptionSecurities_A2FACA041C475F0CCF79C55BFCF16F29" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherInterestAndDividendIncome_141725689ADD7EEB9983C55BFCF16C50_terseLabel_en-US" xlink:label="lab_us-gaap_OtherInterestAndDividendIncome_141725689ADD7EEB9983C55BFCF16C50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted equity securities</link:label>
    <link:label id="lab_us-gaap_OtherInterestAndDividendIncome_141725689ADD7EEB9983C55BFCF16C50_label_en-US" xlink:label="lab_us-gaap_OtherInterestAndDividendIncome_141725689ADD7EEB9983C55BFCF16C50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Interest and Dividend Income</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherInterestAndDividendIncome" xlink:label="loc_us-gaap_OtherInterestAndDividendIncome_141725689ADD7EEB9983C55BFCF16C50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherInterestAndDividendIncome_141725689ADD7EEB9983C55BFCF16C50" xlink:to="lab_us-gaap_OtherInterestAndDividendIncome_141725689ADD7EEB9983C55BFCF16C50" xlink:type="arc" />
    <link:label id="lab_bokf_InterestincomeInterestbearingcashandcashequivalents_1966253ED029290A8F3EC55BFCF1E510_terseLabel_en-US" xlink:label="lab_bokf_InterestincomeInterestbearingcashandcashequivalents_1966253ED029290A8F3EC55BFCF1E510" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest-bearing cash and cash equivalents</link:label>
    <link:label id="lab_bokf_InterestincomeInterestbearingcashandcashequivalents_1966253ED029290A8F3EC55BFCF1E510_label_en-US" xlink:label="lab_bokf_InterestincomeInterestbearingcashandcashequivalents_1966253ED029290A8F3EC55BFCF1E510" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest income, Interest-bearing cash and cash equivalents</link:label>
    <link:label id="lab_bokf_InterestincomeInterestbearingcashandcashequivalents_1966253ED029290A8F3EC55BFCF1E510_documentation_en-US" xlink:label="lab_bokf_InterestincomeInterestbearingcashandcashequivalents_1966253ED029290A8F3EC55BFCF1E510" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest earned from money market and other interest-bearing accounts held with domestic financial institutions, from excess federal funds sold to another commercial bank requiring such for its legal reserve requirements and from securities purchased under agreements to resell.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InterestincomeInterestbearingcashandcashequivalents" xlink:label="loc_bokf_InterestincomeInterestbearingcashandcashequivalents_1966253ED029290A8F3EC55BFCF1E510" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InterestincomeInterestbearingcashandcashequivalents_1966253ED029290A8F3EC55BFCF1E510" xlink:to="lab_bokf_InterestincomeInterestbearingcashandcashequivalents_1966253ED029290A8F3EC55BFCF1E510" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestAndDividendIncomeOperating_24B6177172B5AEF6146FC55BFCF136A3_totalLabel_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeOperating_24B6177172B5AEF6146FC55BFCF136A3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total interest revenue</link:label>
    <link:label id="lab_us-gaap_InterestAndDividendIncomeOperating_24B6177172B5AEF6146FC55BFCF136A3_label_en-US" xlink:label="lab_us-gaap_InterestAndDividendIncomeOperating_24B6177172B5AEF6146FC55BFCF136A3" 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_24B6177172B5AEF6146FC55BFCF136A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_24B6177172B5AEF6146FC55BFCF136A3" xlink:to="lab_us-gaap_InterestAndDividendIncomeOperating_24B6177172B5AEF6146FC55BFCF136A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseAbstract_2B99CEF2E80E715B9925C55BFCF15EAC_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseAbstract_2B99CEF2E80E715B9925C55BFCF15EAC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest expense [Abstract]</link:label>
    <link:label id="lab_us-gaap_InterestExpenseAbstract_2B99CEF2E80E715B9925C55BFCF15EAC_label_en-US" xlink:label="lab_us-gaap_InterestExpenseAbstract_2B99CEF2E80E715B9925C55BFCF15EAC" 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_2B99CEF2E80E715B9925C55BFCF15EAC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseAbstract_2B99CEF2E80E715B9925C55BFCF15EAC" xlink:to="lab_us-gaap_InterestExpenseAbstract_2B99CEF2E80E715B9925C55BFCF15EAC" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseDeposits_B28F966632E69FB34463C55BFCF1587C_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseDeposits_B28F966632E69FB34463C55BFCF1587C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Deposits</link:label>
    <link:label id="lab_us-gaap_InterestExpenseDeposits_B28F966632E69FB34463C55BFCF1587C_label_en-US" xlink:label="lab_us-gaap_InterestExpenseDeposits_B28F966632E69FB34463C55BFCF1587C" 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_B28F966632E69FB34463C55BFCF1587C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseDeposits_B28F966632E69FB34463C55BFCF1587C" xlink:to="lab_us-gaap_InterestExpenseDeposits_B28F966632E69FB34463C55BFCF1587C" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseShortTermBorrowings_B9E42CF7C9312E33F9D7C55BFCF12E53_terseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseShortTermBorrowings_B9E42CF7C9312E33F9D7C55BFCF12E53" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Borrowed funds</link:label>
    <link:label id="lab_us-gaap_InterestExpenseShortTermBorrowings_B9E42CF7C9312E33F9D7C55BFCF12E53_label_en-US" xlink:label="lab_us-gaap_InterestExpenseShortTermBorrowings_B9E42CF7C9312E33F9D7C55BFCF12E53" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Expense, 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_InterestExpenseShortTermBorrowings" xlink:label="loc_us-gaap_InterestExpenseShortTermBorrowings_B9E42CF7C9312E33F9D7C55BFCF12E53" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseShortTermBorrowings_B9E42CF7C9312E33F9D7C55BFCF12E53" xlink:to="lab_us-gaap_InterestExpenseShortTermBorrowings_B9E42CF7C9312E33F9D7C55BFCF12E53" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_8477FA979181BBA65D7AC55BFCF19322_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_8477FA979181BBA65D7AC55BFCF19322" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Subordinated debentures</link:label>
    <link:label id="lab_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_8477FA979181BBA65D7AC55BFCF19322_label_en-US" xlink:label="lab_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_8477FA979181BBA65D7AC55BFCF19322" 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_8477FA979181BBA65D7AC55BFCF19322" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_8477FA979181BBA65D7AC55BFCF19322" xlink:to="lab_us-gaap_InterestExpenseSubordinatedNotesAndDebentures_8477FA979181BBA65D7AC55BFCF19322" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestExpense_FF5FE54C676AD4EF59A4C55BFCF19F10_totalLabel_en-US" xlink:label="lab_us-gaap_InterestExpense_FF5FE54C676AD4EF59A4C55BFCF19F10" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total interest expense</link:label>
    <link:label id="lab_us-gaap_InterestExpense_FF5FE54C676AD4EF59A4C55BFCF19F10_label_en-US" xlink:label="lab_us-gaap_InterestExpense_FF5FE54C676AD4EF59A4C55BFCF19F10" 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_FF5FE54C676AD4EF59A4C55BFCF19F10" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestExpense_FF5FE54C676AD4EF59A4C55BFCF19F10" xlink:to="lab_us-gaap_InterestExpense_FF5FE54C676AD4EF59A4C55BFCF19F10" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_2EFEA206EF0DC8C8CF91C55BFCF19BB7_totalLabel_en-US" xlink:label="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_2EFEA206EF0DC8C8CF91C55BFCF19BB7" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net interest revenue after provision for credit losses</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_2EFEA206EF0DC8C8CF91C55BFCF19BB7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_2EFEA206EF0DC8C8CF91C55BFCF19BB7" xlink:to="lab_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_2EFEA206EF0DC8C8CF91C55BFCF19BB7" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpenseAbstract_D0DC90FA50D244D97CC3C55BFCF1ABE8_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpenseAbstract_D0DC90FA50D244D97CC3C55BFCF1ABE8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other operating revenue [Abstract]</link:label>
    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpenseAbstract_D0DC90FA50D244D97CC3C55BFCF1ABE8_label_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpenseAbstract_D0DC90FA50D244D97CC3C55BFCF1ABE8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Nonoperating Income (Expense) [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_D0DC90FA50D244D97CC3C55BFCF1ABE8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_D0DC90FA50D244D97CC3C55BFCF1ABE8" xlink:to="lab_us-gaap_OtherNonoperatingIncomeExpenseAbstract_D0DC90FA50D244D97CC3C55BFCF1ABE8" xlink:type="arc" />
    <link:label id="lab_bokf_TotalFeesAndCommissions_0687B8B25037705A58DEC55BFCF1EAC2_terseLabel_en-US" xlink:label="lab_bokf_TotalFeesAndCommissions_0687B8B25037705A58DEC55BFCF1EAC2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total fees and commissions</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_TotalFeesAndCommissions" xlink:label="loc_bokf_TotalFeesAndCommissions_0687B8B25037705A58DEC55BFCF1EAC2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_TotalFeesAndCommissions_0687B8B25037705A58DEC55BFCF1EAC2" xlink:to="lab_bokf_TotalFeesAndCommissions_0687B8B25037705A58DEC55BFCF1EAC2" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnDispositionOfAssets1_E73F124E9BD473B56DC5C55BFCF108E6_verboseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnDispositionOfAssets1_E73F124E9BD473B56DC5C55BFCF108E6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Other gains, net</link:label>
    <link:label id="lab_us-gaap_GainLossOnDispositionOfAssets1_E73F124E9BD473B56DC5C55BFCF108E6_label_en-US" xlink:label="lab_us-gaap_GainLossOnDispositionOfAssets1_E73F124E9BD473B56DC5C55BFCF108E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Disposition of Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets1" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_E73F124E9BD473B56DC5C55BFCF108E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnDispositionOfAssets1_E73F124E9BD473B56DC5C55BFCF108E6" xlink:to="lab_us-gaap_GainLossOnDispositionOfAssets1_E73F124E9BD473B56DC5C55BFCF108E6" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossFromPriceRiskManagementActivity_3602A3C2F114054CE10EC55BFCF1F866_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossFromPriceRiskManagementActivity_3602A3C2F114054CE10EC55BFCF1F866" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (loss) on derivatives, net</link:label>
    <link:label id="lab_us-gaap_GainLossFromPriceRiskManagementActivity_3602A3C2F114054CE10EC55BFCF1F866_label_en-US" xlink:label="lab_us-gaap_GainLossFromPriceRiskManagementActivity_3602A3C2F114054CE10EC55BFCF1F866" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) from Price Risk Management Activity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossFromPriceRiskManagementActivity" xlink:label="loc_us-gaap_GainLossFromPriceRiskManagementActivity_3602A3C2F114054CE10EC55BFCF1F866" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossFromPriceRiskManagementActivity_3602A3C2F114054CE10EC55BFCF1F866" xlink:to="lab_us-gaap_GainLossFromPriceRiskManagementActivity_3602A3C2F114054CE10EC55BFCF1F866" xlink:type="arc" />
    <link:label id="lab_bokf_GainOnFairValueOptionSecuritiesNet_A40711A87588E858313DC55BFCF19421_terseLabel_en-US" xlink:label="lab_bokf_GainOnFairValueOptionSecuritiesNet_A40711A87588E858313DC55BFCF19421" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Gain (loss) on fair value option securities, net</link:label>
    <link:label id="lab_bokf_GainOnFairValueOptionSecuritiesNet_A40711A87588E858313DC55BFCF19421_label_en-US" xlink:label="lab_bokf_GainOnFairValueOptionSecuritiesNet_A40711A87588E858313DC55BFCF19421" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain on fair value option securities, net</link:label>
    <link:label id="lab_bokf_GainOnFairValueOptionSecuritiesNet_A40711A87588E858313DC55BFCF19421_documentation_en-US" xlink:label="lab_bokf_GainOnFairValueOptionSecuritiesNet_A40711A87588E858313DC55BFCF19421" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Gain (loss) included in earning for the period related fair value option securities primarily held as an economic hedge of the changes in the fair value of mortgage servicing rights.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_GainOnFairValueOptionSecuritiesNet" xlink:label="loc_bokf_GainOnFairValueOptionSecuritiesNet_A40711A87588E858313DC55BFCF19421" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_GainOnFairValueOptionSecuritiesNet_A40711A87588E858313DC55BFCF19421" xlink:to="lab_bokf_GainOnFairValueOptionSecuritiesNet_A40711A87588E858313DC55BFCF19421" xlink:type="arc" />
    <link:label id="lab_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_C1320CA35D794A481F31C55BFCF1678D_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_C1320CA35D794A481F31C55BFCF1678D" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value of mortgage servicing rights</link:label>
    <link:label id="lab_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_C1320CA35D794A481F31C55BFCF1678D_label_en-US" xlink:label="lab_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_C1320CA35D794A481F31C55BFCF1678D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Servicing Rights (MSR) Impairment (Recovery)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MortgageServicingRightsMSRImpairmentRecovery" xlink:label="loc_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_C1320CA35D794A481F31C55BFCF1678D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_C1320CA35D794A481F31C55BFCF1678D" xlink:to="lab_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_C1320CA35D794A481F31C55BFCF1678D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtSecuritiesRealizedGainLoss_C2909E0BAC2AFB1ADA5FC55BFF9201FA_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtSecuritiesRealizedGainLoss_C2909E0BAC2AFB1ADA5FC55BFF9201FA" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Gain (loss) on available for sale securities, net</link:label>
    <link:label id="lab_us-gaap_DebtSecuritiesRealizedGainLoss_C2909E0BAC2AFB1ADA5FC55BFF9201FA_label_en-US" xlink:label="lab_us-gaap_DebtSecuritiesRealizedGainLoss_C2909E0BAC2AFB1ADA5FC55BFF9201FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Securities, 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_DebtSecuritiesRealizedGainLoss" xlink:label="loc_us-gaap_DebtSecuritiesRealizedGainLoss_C2909E0BAC2AFB1ADA5FC55BFF9201FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtSecuritiesRealizedGainLoss_C2909E0BAC2AFB1ADA5FC55BFF9201FA" xlink:to="lab_us-gaap_DebtSecuritiesRealizedGainLoss_C2909E0BAC2AFB1ADA5FC55BFF9201FA" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestIncome_8AB76E0A3C04BF4CA936C55BFCF180BB_totalLabel_en-US" xlink:label="lab_us-gaap_NoninterestIncome_8AB76E0A3C04BF4CA936C55BFCF180BB" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total other operating revenue</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_8AB76E0A3C04BF4CA936C55BFCF180BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestIncome_8AB76E0A3C04BF4CA936C55BFCF180BB" xlink:to="lab_us-gaap_NoninterestIncome_8AB76E0A3C04BF4CA936C55BFCF180BB" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestExpenseAbstract_91EEDFBA50D106C1D40FC55BFCF138FE_terseLabel_en-US" xlink:label="lab_us-gaap_NoninterestExpenseAbstract_91EEDFBA50D106C1D40FC55BFCF138FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other operating expense [Abstract]</link:label>
    <link:label id="lab_us-gaap_NoninterestExpenseAbstract_91EEDFBA50D106C1D40FC55BFCF138FE_label_en-US" xlink:label="lab_us-gaap_NoninterestExpenseAbstract_91EEDFBA50D106C1D40FC55BFCF138FE" 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_91EEDFBA50D106C1D40FC55BFCF138FE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_91EEDFBA50D106C1D40FC55BFCF138FE" xlink:to="lab_us-gaap_NoninterestExpenseAbstract_91EEDFBA50D106C1D40FC55BFCF138FE" xlink:type="arc" />
    <link:label id="lab_us-gaap_LaborAndRelatedExpense_34B96BFD094843041AFAC55BFCF11DA1_terseLabel_en-US" xlink:label="lab_us-gaap_LaborAndRelatedExpense_34B96BFD094843041AFAC55BFCF11DA1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Personnel</link:label>
    <link:label id="lab_us-gaap_LaborAndRelatedExpense_34B96BFD094843041AFAC55BFCF11DA1_label_en-US" xlink:label="lab_us-gaap_LaborAndRelatedExpense_34B96BFD094843041AFAC55BFCF11DA1" 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_34B96BFD094843041AFAC55BFCF11DA1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LaborAndRelatedExpense_34B96BFD094843041AFAC55BFCF11DA1" xlink:to="lab_us-gaap_LaborAndRelatedExpense_34B96BFD094843041AFAC55BFCF11DA1" xlink:type="arc" />
    <link:label id="lab_us-gaap_MarketingAndAdvertisingExpense_64B596F388D82FC1F5C9C55BFCF1224B_terseLabel_en-US" xlink:label="lab_us-gaap_MarketingAndAdvertisingExpense_64B596F388D82FC1F5C9C55BFCF1224B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business promotion</link:label>
    <link:label id="lab_us-gaap_MarketingAndAdvertisingExpense_64B596F388D82FC1F5C9C55BFCF1224B_label_en-US" xlink:label="lab_us-gaap_MarketingAndAdvertisingExpense_64B596F388D82FC1F5C9C55BFCF1224B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Marketing and Advertising Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MarketingAndAdvertisingExpense" xlink:label="loc_us-gaap_MarketingAndAdvertisingExpense_64B596F388D82FC1F5C9C55BFCF1224B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MarketingAndAdvertisingExpense_64B596F388D82FC1F5C9C55BFCF1224B" xlink:to="lab_us-gaap_MarketingAndAdvertisingExpense_64B596F388D82FC1F5C9C55BFCF1224B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProfessionalFees_E2409DF1F6CD24CC7AFAC55BFCF1A389_terseLabel_en-US" xlink:label="lab_us-gaap_ProfessionalFees_E2409DF1F6CD24CC7AFAC55BFCF1A389" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Professional fees and services</link:label>
    <link:label id="lab_us-gaap_ProfessionalFees_E2409DF1F6CD24CC7AFAC55BFCF1A389_label_en-US" xlink:label="lab_us-gaap_ProfessionalFees_E2409DF1F6CD24CC7AFAC55BFCF1A389" 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_E2409DF1F6CD24CC7AFAC55BFCF1A389" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfessionalFees_E2409DF1F6CD24CC7AFAC55BFCF1A389" xlink:to="lab_us-gaap_ProfessionalFees_E2409DF1F6CD24CC7AFAC55BFCF1A389" xlink:type="arc" />
    <link:label id="lab_us-gaap_OccupancyNet_E6DED3278584F5831F04C55BFCF1294E_terseLabel_en-US" xlink:label="lab_us-gaap_OccupancyNet_E6DED3278584F5831F04C55BFCF1294E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net occupancy and equipment</link:label>
    <link:label id="lab_us-gaap_OccupancyNet_E6DED3278584F5831F04C55BFCF1294E_label_en-US" xlink:label="lab_us-gaap_OccupancyNet_E6DED3278584F5831F04C55BFCF1294E" 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_E6DED3278584F5831F04C55BFCF1294E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OccupancyNet_E6DED3278584F5831F04C55BFCF1294E" xlink:to="lab_us-gaap_OccupancyNet_E6DED3278584F5831F04C55BFCF1294E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_65E4E3B6F23BB52781F7C55BFCF12EE4_terseLabel_en-US" xlink:label="lab_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_65E4E3B6F23BB52781F7C55BFCF12EE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insurance</link:label>
    <link:label id="lab_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_65E4E3B6F23BB52781F7C55BFCF12EE4_label_en-US" xlink:label="lab_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_65E4E3B6F23BB52781F7C55BFCF12EE4" 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_65E4E3B6F23BB52781F7C55BFCF12EE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_65E4E3B6F23BB52781F7C55BFCF12EE4" xlink:to="lab_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_65E4E3B6F23BB52781F7C55BFCF12EE4" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommunicationsAndInformationTechnology_674566B994A9E24918E7C55BFCF1A6D3_terseLabel_en-US" xlink:label="lab_us-gaap_CommunicationsAndInformationTechnology_674566B994A9E24918E7C55BFCF1A6D3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Data processing and communications</link:label>
    <link:label id="lab_us-gaap_CommunicationsAndInformationTechnology_674566B994A9E24918E7C55BFCF1A6D3_label_en-US" xlink:label="lab_us-gaap_CommunicationsAndInformationTechnology_674566B994A9E24918E7C55BFCF1A6D3" 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_674566B994A9E24918E7C55BFCF1A6D3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommunicationsAndInformationTechnology_674566B994A9E24918E7C55BFCF1A6D3" xlink:to="lab_us-gaap_CommunicationsAndInformationTechnology_674566B994A9E24918E7C55BFCF1A6D3" xlink:type="arc" />
    <link:label id="lab_us-gaap_SuppliesAndPostageExpense_9613D0873A1816342F22C55BFCF1C58F_terseLabel_en-US" xlink:label="lab_us-gaap_SuppliesAndPostageExpense_9613D0873A1816342F22C55BFCF1C58F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Printing, postage and supplies</link:label>
    <link:label id="lab_us-gaap_SuppliesAndPostageExpense_9613D0873A1816342F22C55BFCF1C58F_label_en-US" xlink:label="lab_us-gaap_SuppliesAndPostageExpense_9613D0873A1816342F22C55BFCF1C58F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplies and Postage Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SuppliesAndPostageExpense" xlink:label="loc_us-gaap_SuppliesAndPostageExpense_9613D0873A1816342F22C55BFCF1C58F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SuppliesAndPostageExpense_9613D0873A1816342F22C55BFCF1C58F" xlink:to="lab_us-gaap_SuppliesAndPostageExpense_9613D0873A1816342F22C55BFCF1C58F" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_D6B7FFA14615C708E44BC55BFCF17209_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_D6B7FFA14615C708E44BC55BFCF17209" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net losses and operating expenses of repossessed assets</link:label>
    <link:label id="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_D6B7FFA14615C708E44BC55BFCF17209_label_en-US" xlink:label="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_D6B7FFA14615C708E44BC55BFCF17209" 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_D6B7FFA14615C708E44BC55BFCF17209" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_D6B7FFA14615C708E44BC55BFCF17209" xlink:to="lab_us-gaap_GainsLossesOnSalesOfOtherRealEstate_D6B7FFA14615C708E44BC55BFCF17209" xlink:type="arc" />
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_98A27C853991A023AA2EC55BFCF18A24_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_98A27C853991A023AA2EC55BFCF18A24" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of intangible assets</link:label>
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_98A27C853991A023AA2EC55BFCF18A24_label_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_98A27C853991A023AA2EC55BFCF18A24" 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_98A27C853991A023AA2EC55BFCF18A24" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfIntangibleAssets_98A27C853991A023AA2EC55BFCF18A24" xlink:to="lab_us-gaap_AmortizationOfIntangibleAssets_98A27C853991A023AA2EC55BFCF18A24" xlink:type="arc" />
    <link:label id="lab_bokf_MortgageBankingCosts_3B0F6F7C1B7358716AD3C55BFCF1BC92_terseLabel_en-US" xlink:label="lab_bokf_MortgageBankingCosts_3B0F6F7C1B7358716AD3C55BFCF1BC92" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage banking costs</link:label>
    <link:label id="lab_bokf_MortgageBankingCosts_3B0F6F7C1B7358716AD3C55BFCF1BC92_label_en-US" xlink:label="lab_bokf_MortgageBankingCosts_3B0F6F7C1B7358716AD3C55BFCF1BC92" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage banking costs</link:label>
    <link:label id="lab_bokf_MortgageBankingCosts_3B0F6F7C1B7358716AD3C55BFCF1BC92_documentation_en-US" xlink:label="lab_bokf_MortgageBankingCosts_3B0F6F7C1B7358716AD3C55BFCF1BC92" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Expense related to mortgage banking activities including amortization of capitalized mortgage servicing rights, provision for losses on mortgage loans sold with recourse and other mortgage banking expenses.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MortgageBankingCosts" xlink:label="loc_bokf_MortgageBankingCosts_3B0F6F7C1B7358716AD3C55BFCF1BC92" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MortgageBankingCosts_3B0F6F7C1B7358716AD3C55BFCF1BC92" xlink:to="lab_bokf_MortgageBankingCosts_3B0F6F7C1B7358716AD3C55BFCF1BC92" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherNoninterestExpense_F3EB1475386CA11AD391C55BFCF14632_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNoninterestExpense_F3EB1475386CA11AD391C55BFCF14632" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other expense</link:label>
    <link:label id="lab_us-gaap_OtherNoninterestExpense_F3EB1475386CA11AD391C55BFCF14632_label_en-US" xlink:label="lab_us-gaap_OtherNoninterestExpense_F3EB1475386CA11AD391C55BFCF14632" 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_F3EB1475386CA11AD391C55BFCF14632" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherNoninterestExpense_F3EB1475386CA11AD391C55BFCF14632" xlink:to="lab_us-gaap_OtherNoninterestExpense_F3EB1475386CA11AD391C55BFCF14632" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoninterestExpense_024543A72D85F20283C0C55BFCF1D98B_totalLabel_en-US" xlink:label="lab_us-gaap_NoninterestExpense_024543A72D85F20283C0C55BFCF1D98B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total other operating 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_024543A72D85F20283C0C55BFCF1D98B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoninterestExpense_024543A72D85F20283C0C55BFCF1D98B" xlink:to="lab_us-gaap_NoninterestExpense_024543A72D85F20283C0C55BFCF1D98B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProfitLoss_922919E27634282146A9C55BFCF16BFE_totalLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss_922919E27634282146A9C55BFCF16BFE" 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_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_922919E27634282146A9C55BFCF16BFE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfitLoss_922919E27634282146A9C55BFCF16BFE" xlink:to="lab_us-gaap_ProfitLoss_922919E27634282146A9C55BFCF16BFE" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_77022DE4F63CA8318E77C55BFCF1B0FA_terseLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_77022DE4F63CA8318E77C55BFCF1B0FA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net income attributable to non-controlling interests</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_77022DE4F63CA8318E77C55BFCF1B0FA_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_77022DE4F63CA8318E77C55BFCF1B0FA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Attributable to Noncontrolling Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_77022DE4F63CA8318E77C55BFCF1B0FA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_77022DE4F63CA8318E77C55BFCF1B0FA" xlink:to="lab_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_77022DE4F63CA8318E77C55BFCF1B0FA" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLoss_4B5017C0D3BD7E19A776C55BFD012CE1_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLoss_4B5017C0D3BD7E19A776C55BFD012CE1" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net income attributable to BOK Financial Corporation shareholders</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_4B5017C0D3BD7E19A776C55BFD012CE1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLoss_4B5017C0D3BD7E19A776C55BFD012CE1" xlink:to="lab_us-gaap_NetIncomeLoss_4B5017C0D3BD7E19A776C55BFD012CE1" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_35FF21DAB0945256AE3DC55BFD01043E_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract_35FF21DAB0945256AE3DC55BFD01043E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" 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_35FF21DAB0945256AE3DC55BFD01043E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareAbstract_35FF21DAB0945256AE3DC55BFD01043E" xlink:to="lab_us-gaap_EarningsPerShareAbstract_35FF21DAB0945256AE3DC55BFD01043E" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareBasic_27D6BCF1B0E49486B65BC55BFD019288_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic_27D6BCF1B0E49486B65BC55BFD019288" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Basic</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareBasic_27D6BCF1B0E49486B65BC55BFD019288_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic_27D6BCF1B0E49486B65BC55BFD019288" 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_27D6BCF1B0E49486B65BC55BFD019288" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasic_27D6BCF1B0E49486B65BC55BFD019288" xlink:to="lab_us-gaap_EarningsPerShareBasic_27D6BCF1B0E49486B65BC55BFD019288" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_C80A8EE605DAAF306400C55BFD0191AE_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted_C80A8EE605DAAF306400C55BFD0191AE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Diluted</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_C80A8EE605DAAF306400C55BFD0191AE_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted_C80A8EE605DAAF306400C55BFD0191AE" 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_C80A8EE605DAAF306400C55BFD0191AE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareDiluted_C80A8EE605DAAF306400C55BFD0191AE" xlink:to="lab_us-gaap_EarningsPerShareDiluted_C80A8EE605DAAF306400C55BFD0191AE" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_DCEE4CEB3DED2665C589C55BFD01DB36_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_DCEE4CEB3DED2665C589C55BFD01DB36" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average shares used in computation: [Abstract]</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_DCEE4CEB3DED2665C589C55BFD01DB36_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_DCEE4CEB3DED2665C589C55BFD01DB36" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_DCEE4CEB3DED2665C589C55BFD01DB36" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_DCEE4CEB3DED2665C589C55BFD01DB36" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasicAbstract_DCEE4CEB3DED2665C589C55BFD01DB36" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9E8BF67FEE17C0BAD303C55BFD014EC5_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9E8BF67FEE17C0BAD303C55BFD014EC5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basic</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9E8BF67FEE17C0BAD303C55BFD014EC5_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9E8BF67FEE17C0BAD303C55BFD014EC5" 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_9E8BF67FEE17C0BAD303C55BFD014EC5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9E8BF67FEE17C0BAD303C55BFD014EC5" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_9E8BF67FEE17C0BAD303C55BFD014EC5" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_D34689C51E0DBD9AF502C55BFD013FEC_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_D34689C51E0DBD9AF502C55BFD013FEC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diluted</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_D34689C51E0DBD9AF502C55BFD013FEC_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_D34689C51E0DBD9AF502C55BFD013FEC" 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_D34689C51E0DBD9AF502C55BFD013FEC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_D34689C51E0DBD9AF502C55BFD013FEC" xlink:to="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_D34689C51E0DBD9AF502C55BFD013FEC" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockDividendsPerShareDeclared_ABDD1ED6DBCD9F7904D6C55BFD01796B_verboseLabel_en-US" xlink:label="lab_us-gaap_CommonStockDividendsPerShareDeclared_ABDD1ED6DBCD9F7904D6C55BFD01796B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Dividends declared per share</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_ABDD1ED6DBCD9F7904D6C55BFD01796B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockDividendsPerShareDeclared_ABDD1ED6DBCD9F7904D6C55BFD01796B" xlink:to="lab_us-gaap_CommonStockDividendsPerShareDeclared_ABDD1ED6DBCD9F7904D6C55BFD01796B" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationsAbstract_C007C3FE102A8C10A8A5C114FCC78092_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationsAbstract_C007C3FE102A8C10A8A5C114FCC78092" 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_C007C3FE102A8C10A8A5C114FCC78092" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_C007C3FE102A8C10A8A5C114FCC78092" xlink:to="lab_us-gaap_BusinessCombinationsAbstract_C007C3FE102A8C10A8A5C114FCC78092" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_DD34C8F3D588ABBE900DC114FCC7F7CF_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_DD34C8F3D588ABBE900DC114FCC7F7CF" 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_DD34C8F3D588ABBE900DC114FCC7F7CF_label_en-US" xlink:label="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_DD34C8F3D588ABBE900DC114FCC7F7CF" 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_DD34C8F3D588ABBE900DC114FCC7F7CF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_DD34C8F3D588ABBE900DC114FCC7F7CF" xlink:to="lab_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_DD34C8F3D588ABBE900DC114FCC7F7CF" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionAxis_45A24E3AACEDEA886327C114FCC74222_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAxis_45A24E3AACEDEA886327C114FCC74222" 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_45A24E3AACEDEA886327C114FCC74222_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAxis_45A24E3AACEDEA886327C114FCC74222" 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_45A24E3AACEDEA886327C114FCC74222" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_45A24E3AACEDEA886327C114FCC74222" xlink:to="lab_us-gaap_BusinessAcquisitionAxis_45A24E3AACEDEA886327C114FCC74222" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionAcquireeDomain_99ABEA1C313CCAE91A88C114FCC71BEC_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAcquireeDomain_99ABEA1C313CCAE91A88C114FCC71BEC" 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_99ABEA1C313CCAE91A88C114FCC71BEC_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionAcquireeDomain_99ABEA1C313CCAE91A88C114FCC71BEC" 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_99ABEA1C313CCAE91A88C114FCC71BEC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_99ABEA1C313CCAE91A88C114FCC71BEC" xlink:to="lab_us-gaap_BusinessAcquisitionAcquireeDomain_99ABEA1C313CCAE91A88C114FCC71BEC" xlink:type="arc" />
    <link:label id="lab_bokf_CobizFinancialInc.Member_4177786F965FE782445DC114FCC70AD8_terseLabel_en-US" xlink:label="lab_bokf_CobizFinancialInc.Member_4177786F965FE782445DC114FCC70AD8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cobiz Financial Inc. [Member]</link:label>
    <link:label id="lab_bokf_CobizFinancialInc.Member_4177786F965FE782445DC114FCC70AD8_label_en-US" xlink:label="lab_bokf_CobizFinancialInc.Member_4177786F965FE782445DC114FCC70AD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cobiz Financial Inc. [Member]</link:label>
    <link:label id="lab_bokf_CobizFinancialInc.Member_4177786F965FE782445DC114FCC70AD8_documentation_en-US" xlink:label="lab_bokf_CobizFinancialInc.Member_4177786F965FE782445DC114FCC70AD8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cobiz Financial Inc. [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CobizFinancialInc.Member" xlink:label="loc_bokf_CobizFinancialInc.Member_4177786F965FE782445DC114FCC70AD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CobizFinancialInc.Member_4177786F965FE782445DC114FCC70AD8" xlink:to="lab_bokf_CobizFinancialInc.Member_4177786F965FE782445DC114FCC70AD8" xlink:type="arc" />
    <link:label id="lab_bokf_SwitchgrassHoldingsLLCMember_73CC50670CCA1E85E488C114FCC77579_terseLabel_en-US" xlink:label="lab_bokf_SwitchgrassHoldingsLLCMember_73CC50670CCA1E85E488C114FCC77579" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Switchgrass Holdings LLC [Member]</link:label>
    <link:label id="lab_bokf_SwitchgrassHoldingsLLCMember_73CC50670CCA1E85E488C114FCC77579_label_en-US" xlink:label="lab_bokf_SwitchgrassHoldingsLLCMember_73CC50670CCA1E85E488C114FCC77579" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Switchgrass Holdings LLC [Member]</link:label>
    <link:label id="lab_bokf_SwitchgrassHoldingsLLCMember_73CC50670CCA1E85E488C114FCC77579_documentation_en-US" xlink:label="lab_bokf_SwitchgrassHoldingsLLCMember_73CC50670CCA1E85E488C114FCC77579" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Switchgrass Holdings LLC [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_SwitchgrassHoldingsLLCMember" xlink:label="loc_bokf_SwitchgrassHoldingsLLCMember_73CC50670CCA1E85E488C114FCC77579" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_SwitchgrassHoldingsLLCMember_73CC50670CCA1E85E488C114FCC77579" xlink:to="lab_bokf_SwitchgrassHoldingsLLCMember_73CC50670CCA1E85E488C114FCC77579" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionLineItems_65ADD49D2E64DF2A6851C114FCC7DF71_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems_65ADD49D2E64DF2A6851C114FCC7DF71" 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_65ADD49D2E64DF2A6851C114FCC7DF71_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionLineItems_65ADD49D2E64DF2A6851C114FCC7DF71" 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_65ADD49D2E64DF2A6851C114FCC7DF71" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_65ADD49D2E64DF2A6851C114FCC7DF71" xlink:to="lab_us-gaap_BusinessAcquisitionLineItems_65ADD49D2E64DF2A6851C114FCC7DF71" xlink:type="arc" />
    <link:label id="lab_bokf_CobizFinancialLoans_5AD0449CD32DFC398339C114FCC7256C_terseLabel_en-US" xlink:label="lab_bokf_CobizFinancialLoans_5AD0449CD32DFC398339C114FCC7256C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cobiz Financial Loans</link:label>
    <link:label id="lab_bokf_CobizFinancialLoans_5AD0449CD32DFC398339C114FCC7256C_label_en-US" xlink:label="lab_bokf_CobizFinancialLoans_5AD0449CD32DFC398339C114FCC7256C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cobiz Financial Loans</link:label>
    <link:label id="lab_bokf_CobizFinancialLoans_5AD0449CD32DFC398339C114FCC7256C_documentation_en-US" xlink:label="lab_bokf_CobizFinancialLoans_5AD0449CD32DFC398339C114FCC7256C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cobiz Financial Loans</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CobizFinancialLoans" xlink:label="loc_bokf_CobizFinancialLoans_5AD0449CD32DFC398339C114FCC7256C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CobizFinancialLoans_5AD0449CD32DFC398339C114FCC7256C" xlink:to="lab_bokf_CobizFinancialLoans_5AD0449CD32DFC398339C114FCC7256C" xlink:type="arc" />
    <link:label id="lab_bokf_CobizFinancialAssets_2A88978B64F45A4A1016C114FCC7F72E_terseLabel_en-US" xlink:label="lab_bokf_CobizFinancialAssets_2A88978B64F45A4A1016C114FCC7F72E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cobiz Financial Assets</link:label>
    <link:label id="lab_bokf_CobizFinancialAssets_2A88978B64F45A4A1016C114FCC7F72E_label_en-US" xlink:label="lab_bokf_CobizFinancialAssets_2A88978B64F45A4A1016C114FCC7F72E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cobiz Financial Assets</link:label>
    <link:label id="lab_bokf_CobizFinancialAssets_2A88978B64F45A4A1016C114FCC7F72E_documentation_en-US" xlink:label="lab_bokf_CobizFinancialAssets_2A88978B64F45A4A1016C114FCC7F72E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cobiz Financial Assets</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CobizFinancialAssets" xlink:label="loc_bokf_CobizFinancialAssets_2A88978B64F45A4A1016C114FCC7F72E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CobizFinancialAssets_2A88978B64F45A4A1016C114FCC7F72E" xlink:to="lab_bokf_CobizFinancialAssets_2A88978B64F45A4A1016C114FCC7F72E" xlink:type="arc" />
    <link:label id="lab_bokf_CobizFinancialDeposits_718F3FD8F47F21CC80D9C114FCC7EFD4_terseLabel_en-US" xlink:label="lab_bokf_CobizFinancialDeposits_718F3FD8F47F21CC80D9C114FCC7EFD4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cobiz Financial Deposits</link:label>
    <link:label id="lab_bokf_CobizFinancialDeposits_718F3FD8F47F21CC80D9C114FCC7EFD4_label_en-US" xlink:label="lab_bokf_CobizFinancialDeposits_718F3FD8F47F21CC80D9C114FCC7EFD4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cobiz Financial Deposits</link:label>
    <link:label id="lab_bokf_CobizFinancialDeposits_718F3FD8F47F21CC80D9C114FCC7EFD4_documentation_en-US" xlink:label="lab_bokf_CobizFinancialDeposits_718F3FD8F47F21CC80D9C114FCC7EFD4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cobiz Financial Deposits</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CobizFinancialDeposits" xlink:label="loc_bokf_CobizFinancialDeposits_718F3FD8F47F21CC80D9C114FCC7EFD4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CobizFinancialDeposits_718F3FD8F47F21CC80D9C114FCC7EFD4" xlink:to="lab_bokf_CobizFinancialDeposits_718F3FD8F47F21CC80D9C114FCC7EFD4" xlink:type="arc" />
    <link:label id="lab_bokf_CobizFinancialEquity_9D1DD57C9291953ED5D6C114FCC7952D_terseLabel_en-US" xlink:label="lab_bokf_CobizFinancialEquity_9D1DD57C9291953ED5D6C114FCC7952D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cobiz Financial Equity</link:label>
    <link:label id="lab_bokf_CobizFinancialEquity_9D1DD57C9291953ED5D6C114FCC7952D_label_en-US" xlink:label="lab_bokf_CobizFinancialEquity_9D1DD57C9291953ED5D6C114FCC7952D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cobiz Financial Equity</link:label>
    <link:label id="lab_bokf_CobizFinancialEquity_9D1DD57C9291953ED5D6C114FCC7952D_documentation_en-US" xlink:label="lab_bokf_CobizFinancialEquity_9D1DD57C9291953ED5D6C114FCC7952D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cobiz Financial Equity</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CobizFinancialEquity" xlink:label="loc_bokf_CobizFinancialEquity_9D1DD57C9291953ED5D6C114FCC7952D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CobizFinancialEquity_9D1DD57C9291953ED5D6C114FCC7952D" xlink:to="lab_bokf_CobizFinancialEquity_9D1DD57C9291953ED5D6C114FCC7952D" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_596AC177B3FC9F090606C114FCC745FF_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_596AC177B3FC9F090606C114FCC745FF" 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_596AC177B3FC9F090606C114FCC745FF_label_en-US" xlink:label="lab_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_596AC177B3FC9F090606C114FCC745FF" 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_596AC177B3FC9F090606C114FCC745FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_596AC177B3FC9F090606C114FCC745FF" xlink:to="lab_us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1_596AC177B3FC9F090606C114FCC745FF" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_4390A29340A27DBB7BB8C114FCC7D06A_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_4390A29340A27DBB7BB8C114FCC7D06A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_4390A29340A27DBB7BB8C114FCC7D06A_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_4390A29340A27DBB7BB8C114FCC7D06A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_4390A29340A27DBB7BB8C114FCC7D06A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_4390A29340A27DBB7BB8C114FCC7D06A" xlink:to="lab_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_4390A29340A27DBB7BB8C114FCC7D06A" xlink:type="arc" />
    <link:label id="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashPaid_3BA7837169418680851AC114FCC7D6B2_terseLabel_en-US" xlink:label="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashPaid_3BA7837169418680851AC114FCC7D6B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Paid</link:label>
    <link:label id="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashPaid_3BA7837169418680851AC114FCC7D6B2_label_en-US" xlink:label="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashPaid_3BA7837169418680851AC114FCC7D6B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Paid</link:label>
    <link:label id="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashPaid_3BA7837169418680851AC114FCC7D6B2_documentation_en-US" xlink:label="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashPaid_3BA7837169418680851AC114FCC7D6B2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Paid</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashPaid" xlink:label="loc_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashPaid_3BA7837169418680851AC114FCC7D6B2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashPaid_3BA7837169418680851AC114FCC7D6B2" xlink:to="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentCashPaid_3BA7837169418680851AC114FCC7D6B2" xlink:type="arc" />
    <link:label id="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSharesIssuedasConsideration_604787258667C5275AC5C114FCC7D6EC_terseLabel_en-US" xlink:label="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSharesIssuedasConsideration_604787258667C5275AC5C114FCC7D6EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Shares Issued as Consideration</link:label>
    <link:label id="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSharesIssuedasConsideration_604787258667C5275AC5C114FCC7D6EC_label_en-US" xlink:label="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSharesIssuedasConsideration_604787258667C5275AC5C114FCC7D6EC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Shares Issued as Consideration</link:label>
    <link:label id="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSharesIssuedasConsideration_604787258667C5275AC5C114FCC7D6EC_documentation_en-US" xlink:label="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSharesIssuedasConsideration_604787258667C5275AC5C114FCC7D6EC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Shares Issued as Consideration</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSharesIssuedasConsideration" xlink:label="loc_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSharesIssuedasConsideration_604787258667C5275AC5C114FCC7D6EC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSharesIssuedasConsideration_604787258667C5275AC5C114FCC7D6EC" xlink:to="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentSharesIssuedasConsideration_604787258667C5275AC5C114FCC7D6EC" xlink:type="arc" />
    <link:label id="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentShareValueTransferred_378DD833873B85E5000BC114FCC70A28_terseLabel_en-US" xlink:label="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentShareValueTransferred_378DD833873B85E5000BC114FCC70A28" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Share Value Transferred</link:label>
    <link:label id="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentShareValueTransferred_378DD833873B85E5000BC114FCC70A28_label_en-US" xlink:label="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentShareValueTransferred_378DD833873B85E5000BC114FCC70A28" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Share Value Transferred</link:label>
    <link:label id="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentShareValueTransferred_378DD833873B85E5000BC114FCC70A28_documentation_en-US" xlink:label="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentShareValueTransferred_378DD833873B85E5000BC114FCC70A28" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Share Value Transferred</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentShareValueTransferred" xlink:label="loc_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentShareValueTransferred_378DD833873B85E5000BC114FCC70A28" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentShareValueTransferred_378DD833873B85E5000BC114FCC70A28" xlink:to="lab_bokf_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentShareValueTransferred_378DD833873B85E5000BC114FCC70A28" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_256A35E22D254EF3B5DFC15571B21F11_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_256A35E22D254EF3B5DFC15571B21F11" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_256A35E22D254EF3B5DFC15571B21F11_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_256A35E22D254EF3B5DFC15571B21F11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_256A35E22D254EF3B5DFC15571B21F11" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_256A35E22D254EF3B5DFC15571B21F11" xlink:to="lab_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles_256A35E22D254EF3B5DFC15571B21F11" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_A4698FE2A6E447AC1857C5654ABD35E7_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_A4698FE2A6E447AC1857C5654ABD35E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Amount [Abstract]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_A4698FE2A6E447AC1857C5654ABD35E7_label_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_A4698FE2A6E447AC1857C5654ABD35E7" 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_A4698FE2A6E447AC1857C5654ABD35E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_A4698FE2A6E447AC1857C5654ABD35E7" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_A4698FE2A6E447AC1857C5654ABD35E7" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_8506079CF698CFB7AB0FC5654ABDD520_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_8506079CF698CFB7AB0FC5654ABDD520" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal statutory tax</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_8506079CF698CFB7AB0FC5654ABDD520_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_8506079CF698CFB7AB0FC5654ABDD520" 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_8506079CF698CFB7AB0FC5654ABDD520" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_8506079CF698CFB7AB0FC5654ABDD520" xlink:to="lab_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_8506079CF698CFB7AB0FC5654ABDD520" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationTaxExemptIncome_01122032A3380CEEA387C5654ABDA6B1_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationTaxExemptIncome_01122032A3380CEEA387C5654ABDA6B1" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Tax exempt revenue</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationTaxExemptIncome_01122032A3380CEEA387C5654ABDA6B1_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationTaxExemptIncome_01122032A3380CEEA387C5654ABDA6B1" 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_01122032A3380CEEA387C5654ABDA6B1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationTaxExemptIncome_01122032A3380CEEA387C5654ABDA6B1" xlink:to="lab_us-gaap_IncomeTaxReconciliationTaxExemptIncome_01122032A3380CEEA387C5654ABDA6B1" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_4FCAB39337C285B867E9C5654ABE5DDC_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_4FCAB39337C285B867E9C5654ABE5DDC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effect of state income taxes, net of federal benefit</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_4FCAB39337C285B867E9C5654ABE5DDC_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_4FCAB39337C285B867E9C5654ABE5DDC" 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_4FCAB39337C285B867E9C5654ABE5DDC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_4FCAB39337C285B867E9C5654ABE5DDC" xlink:to="lab_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_4FCAB39337C285B867E9C5654ABE5DDC" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationTaxCreditsOther_A9A20E9F13DDC041E37DC5654ABE166C_negatedLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationTaxCreditsOther_A9A20E9F13DDC041E37DC5654ABE166C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Utilization of tax credits, net of proportional amortization of low-income housing limited partnership investments</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationTaxCreditsOther_A9A20E9F13DDC041E37DC5654ABE166C_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationTaxCreditsOther_A9A20E9F13DDC041E37DC5654ABE166C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsOther" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsOther_A9A20E9F13DDC041E37DC5654ABE166C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationTaxCreditsOther_A9A20E9F13DDC041E37DC5654ABE166C" xlink:to="lab_us-gaap_IncomeTaxReconciliationTaxCreditsOther_A9A20E9F13DDC041E37DC5654ABE166C" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_60C2C933AA5D00A1D6D5C586B6308C93_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_60C2C933AA5D00A1D6D5C586B6308C93" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_60C2C933AA5D00A1D6D5C586B6308C93_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_60C2C933AA5D00A1D6D5C586B6308C93" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_60C2C933AA5D00A1D6D5C586B6308C93" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_60C2C933AA5D00A1D6D5C586B6308C93" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_60C2C933AA5D00A1D6D5C586B6308C93" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_CFB005C73B68FE7E2918C5654ABE2F34_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_CFB005C73B68FE7E2918C5654ABE2F34" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to provisional amounts related to tax reform</link:label>
    <link:label id="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_CFB005C73B68FE7E2918C5654ABE2F34_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_CFB005C73B68FE7E2918C5654ABE2F34" 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_CFB005C73B68FE7E2918C5654ABE2F34" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_CFB005C73B68FE7E2918C5654ABE2F34" xlink:to="lab_us-gaap_IncomeTaxReconciliationChangeInEnactedTaxRate_CFB005C73B68FE7E2918C5654ABE2F34" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_93818176E432DE1BC0FAC5654ABE9636_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_93818176E432DE1BC0FAC5654ABE9636" 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_93818176E432DE1BC0FAC5654ABE9636_label_en-US" xlink:label="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_93818176E432DE1BC0FAC5654ABE9636" 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_93818176E432DE1BC0FAC5654ABE9636" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_93818176E432DE1BC0FAC5654ABE9636" xlink:to="lab_us-gaap_IncomeTaxReconciliationOtherAdjustments_93818176E432DE1BC0FAC5654ABE9636" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxExpenseBenefit_C4B4FF54852E5FAB5476C5654ABEA2E7_totalLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxExpenseBenefit_C4B4FF54852E5FAB5476C5654ABEA2E7" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total income tax expense</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_C4B4FF54852E5FAB5476C5654ABEA2E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_C4B4FF54852E5FAB5476C5654ABEA2E7" xlink:to="lab_us-gaap_IncomeTaxExpenseBenefit_C4B4FF54852E5FAB5476C5654ABEA2E7" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_8B4BA21F15908A29C7C9C5654ABF2737_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_8B4BA21F15908A29C7C9C5654ABF2737" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Percent [Abstract]</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_8B4BA21F15908A29C7C9C5654ABF2737_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_8B4BA21F15908A29C7C9C5654ABF2737" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Percent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_8B4BA21F15908A29C7C9C5654ABF2737" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_8B4BA21F15908A29C7C9C5654ABF2737" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_8B4BA21F15908A29C7C9C5654ABF2737" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_62B173CCDFC181254DD0C5654ABF67D6_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_62B173CCDFC181254DD0C5654ABF67D6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal statutory tax (in hundredths)</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_62B173CCDFC181254DD0C5654ABF67D6_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_62B173CCDFC181254DD0C5654ABF67D6" 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_62B173CCDFC181254DD0C5654ABF67D6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_62B173CCDFC181254DD0C5654ABF67D6" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_62B173CCDFC181254DD0C5654ABF67D6" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_E61B0FCAA96322E7D15CC5654ABFE916_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_E61B0FCAA96322E7D15CC5654ABFE916" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Tax exempt revenue (in hundredths)</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_E61B0FCAA96322E7D15CC5654ABFE916_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_E61B0FCAA96322E7D15CC5654ABFE916" 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_E61B0FCAA96322E7D15CC5654ABFE916" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_E61B0FCAA96322E7D15CC5654ABFE916" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_E61B0FCAA96322E7D15CC5654ABFE916" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_D504F1B9080F26868516C5654ABF3F33_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_D504F1B9080F26868516C5654ABF3F33" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effect of state income taxes, net of federal benefit (in hundredths)</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_D504F1B9080F26868516C5654ABF3F33_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_D504F1B9080F26868516C5654ABF3F33" 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_D504F1B9080F26868516C5654ABF3F33" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_D504F1B9080F26868516C5654ABF3F33" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_D504F1B9080F26868516C5654ABF3F33" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_99F2C820D0664C9161AAC5654ABF9C9C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_99F2C820D0664C9161AAC5654ABF9C9C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Utilization of tax credits, net of proportional amortization of low-income housing limited partnership investments (in hundredths)</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_99F2C820D0664C9161AAC5654ABF9C9C_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_99F2C820D0664C9161AAC5654ABF9C9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_99F2C820D0664C9161AAC5654ABF9C9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_99F2C820D0664C9161AAC5654ABF9C9C" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_99F2C820D0664C9161AAC5654ABF9C9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_BC1D09B58A82A44461FDC588DEC15747_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_BC1D09B58A82A44461FDC588DEC15747" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based compensation (in hundredths)</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_BC1D09B58A82A44461FDC588DEC15747_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_BC1D09B58A82A44461FDC588DEC15747" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Percent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_BC1D09B58A82A44461FDC588DEC15747" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_BC1D09B58A82A44461FDC588DEC15747" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_BC1D09B58A82A44461FDC588DEC15747" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_719638605685BD7B5E55C5654AC0A3E1_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_719638605685BD7B5E55C5654AC0A3E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustment to provisional amounts related to tax reform (in hundredths)</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_719638605685BD7B5E55C5654AC0A3E1_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_719638605685BD7B5E55C5654AC0A3E1" 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_719638605685BD7B5E55C5654AC0A3E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_719638605685BD7B5E55C5654AC0A3E1" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_719638605685BD7B5E55C5654AC0A3E1" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_3015F72414C1D2178CBDC5654AC06E1B_terseLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_3015F72414C1D2178CBDC5654AC06E1B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other, net (in hundredths)</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_3015F72414C1D2178CBDC5654AC06E1B_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_3015F72414C1D2178CBDC5654AC06E1B" 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_3015F72414C1D2178CBDC5654AC06E1B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_3015F72414C1D2178CBDC5654AC06E1B" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_3015F72414C1D2178CBDC5654AC06E1B" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8F62E14302D817085D8FC5654AC00B5D_totalLabel_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8F62E14302D817085D8FC5654AC00B5D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total (in hundredths)</link:label>
    <link:label id="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8F62E14302D817085D8FC5654AC00B5D_label_en-US" xlink:label="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8F62E14302D817085D8FC5654AC00B5D" 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_8F62E14302D817085D8FC5654AC00B5D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8F62E14302D817085D8FC5654AC00B5D" xlink:to="lab_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8F62E14302D817085D8FC5654AC00B5D" xlink:type="arc" />
    <link:label id="lab_bokf_NumeratorAbstract_4D5D62EEEAA7B32761CFD47EA8A32220_verboseLabel_en-US" xlink:label="lab_bokf_NumeratorAbstract_4D5D62EEEAA7B32761CFD47EA8A32220" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Numerator: [Abstract]</link:label>
    <link:label id="lab_bokf_NumeratorAbstract_4D5D62EEEAA7B32761CFD47EA8A32220_label_en-US" xlink:label="lab_bokf_NumeratorAbstract_4D5D62EEEAA7B32761CFD47EA8A32220" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Numerator: [Abstract]</link:label>
    <link:label id="lab_bokf_NumeratorAbstract_4D5D62EEEAA7B32761CFD47EA8A32220_documentation_en-US" xlink:label="lab_bokf_NumeratorAbstract_4D5D62EEEAA7B32761CFD47EA8A32220" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NumeratorAbstract" xlink:label="loc_bokf_NumeratorAbstract_4D5D62EEEAA7B32761CFD47EA8A32220" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NumeratorAbstract_4D5D62EEEAA7B32761CFD47EA8A32220" xlink:to="lab_bokf_NumeratorAbstract_4D5D62EEEAA7B32761CFD47EA8A32220" xlink:type="arc" />
    <link:label id="lab_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_8AFFED06C43C07EF3457D47EA8A3E8A8_terseLabel_en-US" xlink:label="lab_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_8AFFED06C43C07EF3457D47EA8A3E8A8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: Earnings allocated to participating securities</link:label>
    <link:label id="lab_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_8AFFED06C43C07EF3457D47EA8A3E8A8_label_en-US" xlink:label="lab_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_8AFFED06C43C07EF3457D47EA8A3E8A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Undistributed Earnings (Loss) Allocated to Participating Securities, Basic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_8AFFED06C43C07EF3457D47EA8A3E8A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_8AFFED06C43C07EF3457D47EA8A3E8A8" xlink:to="lab_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_8AFFED06C43C07EF3457D47EA8A3E8A8" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_1B9E2B784BDEB104A5F7D47EA8A3494B_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_1B9E2B784BDEB104A5F7D47EA8A3494B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Numerator for basic earnings per share &#8211; income available to common shareholders</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_1B9E2B784BDEB104A5F7D47EA8A3494B_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_1B9E2B784BDEB104A5F7D47EA8A3494B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Income (Loss) Available to Common Stockholders, Basic</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_1B9E2B784BDEB104A5F7D47EA8A3494B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_1B9E2B784BDEB104A5F7D47EA8A3494B" xlink:to="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_1B9E2B784BDEB104A5F7D47EA8A3494B" xlink:type="arc" />
    <link:label id="lab_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_5A85071557A4F545B515D47EA8A38C81_negatedLabel_en-US" xlink:label="lab_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_5A85071557A4F545B515D47EA8A38C81" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Effect of reallocating undistributed earnings of participating securities</link:label>
    <link:label id="lab_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_5A85071557A4F545B515D47EA8A38C81_label_en-US" xlink:label="lab_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_5A85071557A4F545B515D47EA8A38C81" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_5A85071557A4F545B515D47EA8A38C81" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_5A85071557A4F545B515D47EA8A38C81" xlink:to="lab_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_5A85071557A4F545B515D47EA8A38C81" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_127ABD42A2B40475C762D47EA8A33567_totalLabel_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_127ABD42A2B40475C762D47EA8A33567" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Numerator for diluted earnings per share &#8211; income available to common shareholders</link:label>
    <link:label id="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_127ABD42A2B40475C762D47EA8A33567_label_en-US" xlink:label="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_127ABD42A2B40475C762D47EA8A33567" 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_127ABD42A2B40475C762D47EA8A33567" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_127ABD42A2B40475C762D47EA8A33567" xlink:to="lab_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_127ABD42A2B40475C762D47EA8A33567" xlink:type="arc" />
    <link:label id="lab_bokf_DenominatorAbstract_224E32B1BD9C0151F7E6D47EA8B2924C_terseLabel_en-US" xlink:label="lab_bokf_DenominatorAbstract_224E32B1BD9C0151F7E6D47EA8B2924C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Denominator: [Abstract]</link:label>
    <link:label id="lab_bokf_DenominatorAbstract_224E32B1BD9C0151F7E6D47EA8B2924C_label_en-US" xlink:label="lab_bokf_DenominatorAbstract_224E32B1BD9C0151F7E6D47EA8B2924C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Denominator: [Abstract]</link:label>
    <link:label id="lab_bokf_DenominatorAbstract_224E32B1BD9C0151F7E6D47EA8B2924C_documentation_en-US" xlink:label="lab_bokf_DenominatorAbstract_224E32B1BD9C0151F7E6D47EA8B2924C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DenominatorAbstract" xlink:label="loc_bokf_DenominatorAbstract_224E32B1BD9C0151F7E6D47EA8B2924C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DenominatorAbstract_224E32B1BD9C0151F7E6D47EA8B2924C" xlink:to="lab_bokf_DenominatorAbstract_224E32B1BD9C0151F7E6D47EA8B2924C" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_B981B39208073D5DD202D47EA8B20EB2_terseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_B981B39208073D5DD202D47EA8B20EB2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average shares outstanding (in shares)</link:label>
    <link:label id="lab_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_B981B39208073D5DD202D47EA8B20EB2_label_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_B981B39208073D5DD202D47EA8B20EB2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Number of Shares Outstanding, Basic and Diluted</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:label="loc_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_B981B39208073D5DD202D47EA8B20EB2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_B981B39208073D5DD202D47EA8B20EB2" xlink:to="lab_us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_B981B39208073D5DD202D47EA8B20EB2" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_CA36442F0DED4CAC27F7D47EA8B2DD06_terseLabel_en-US" xlink:label="lab_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_CA36442F0DED4CAC27F7D47EA8B2DD06" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: Participating securities included in weighted average shares (in shares)</link:label>
    <link:label id="lab_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_CA36442F0DED4CAC27F7D47EA8B2DD06_label_en-US" xlink:label="lab_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_CA36442F0DED4CAC27F7D47EA8B2DD06" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_CA36442F0DED4CAC27F7D47EA8B2DD06" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_CA36442F0DED4CAC27F7D47EA8B2DD06" xlink:to="lab_us-gaap_IncrementalCommonSharesAttributableToParticipatingNonvestedSharesWithNonForfeitableDividendRights_CA36442F0DED4CAC27F7D47EA8B2DD06" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8BD104D3B512C170886ED47EA8B2B9B3_totalLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8BD104D3B512C170886ED47EA8B2B9B3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Denominator for basic earnings per common share (in shares)</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_8BD104D3B512C170886ED47EA8B2B9B3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8BD104D3B512C170886ED47EA8B2B9B3" xlink:to="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_8BD104D3B512C170886ED47EA8B2B9B3" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_0CA3B9A65A66D4A135D8D47EA8B272BC_terseLabel_en-US" xlink:label="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_0CA3B9A65A66D4A135D8D47EA8B272BC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dilutive effect of employee stock compensation plans (in shares)</link:label>
    <link:label id="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_0CA3B9A65A66D4A135D8D47EA8B272BC_label_en-US" xlink:label="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_0CA3B9A65A66D4A135D8D47EA8B272BC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_0CA3B9A65A66D4A135D8D47EA8B272BC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_0CA3B9A65A66D4A135D8D47EA8B272BC" xlink:to="lab_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_0CA3B9A65A66D4A135D8D47EA8B272BC" xlink:type="arc" />
    <link:label id="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_5D861DB859C15E48358ED47EA8B221D3_totalLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_5D861DB859C15E48358ED47EA8B221D3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Denominator for diluted earnings per common share (in shares)</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_5D861DB859C15E48358ED47EA8B221D3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_5D861DB859C15E48358ED47EA8B221D3" xlink:to="lab_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_5D861DB859C15E48358ED47EA8B221D3" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareBasic_CD2D486C06C264438D8DD47EA8B25B97_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareBasic_CD2D486C06C264438D8DD47EA8B25B97" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basic earnings per share (per 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_CD2D486C06C264438D8DD47EA8B25B97" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareBasic_CD2D486C06C264438D8DD47EA8B25B97" xlink:to="lab_us-gaap_EarningsPerShareBasic_CD2D486C06C264438D8DD47EA8B25B97" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareDiluted_E3B13871C81FCE7D3FECD47EA8B2DBBE_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareDiluted_E3B13871C81FCE7D3FECD47EA8B2DBBE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Diluted earnings per share (per 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_E3B13871C81FCE7D3FECD47EA8B2DBBE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareDiluted_E3B13871C81FCE7D3FECD47EA8B2DBBE" xlink:to="lab_us-gaap_EarningsPerShareDiluted_E3B13871C81FCE7D3FECD47EA8B2DBBE" xlink:type="arc" />
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_FCB8DF49695FCC41E3ADD47EA8B251AC_terseLabel_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_FCB8DF49695FCC41E3ADD47EA8B251AC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Excludes employee stock options with exercise prices greater than current market price.</link:label>
    <link:label id="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_FCB8DF49695FCC41E3ADD47EA8B251AC_label_en-US" xlink:label="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_FCB8DF49695FCC41E3ADD47EA8B251AC" 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_FCB8DF49695FCC41E3ADD47EA8B251AC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_FCB8DF49695FCC41E3ADD47EA8B251AC" xlink:to="lab_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_FCB8DF49695FCC41E3ADD47EA8B251AC" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_982CCA0676432AB9B1A6D47EA765749C_verboseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_982CCA0676432AB9B1A6D47EA765749C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Shareholders' Equity [Text Block]</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_982CCA0676432AB9B1A6D47EA765749C_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_982CCA0676432AB9B1A6D47EA765749C" 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_982CCA0676432AB9B1A6D47EA765749C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock_982CCA0676432AB9B1A6D47EA765749C" xlink:to="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_982CCA0676432AB9B1A6D47EA765749C" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_4B4A8E47A840DFD28483D47EA7469FC1_verboseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_4B4A8E47A840DFD28483D47EA7469FC1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Text Block]</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_4B4A8E47A840DFD28483D47EA7469FC1_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_4B4A8E47A840DFD28483D47EA7469FC1" 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_4B4A8E47A840DFD28483D47EA7469FC1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EarningsPerShareTextBlock_4B4A8E47A840DFD28483D47EA7469FC1" xlink:to="lab_us-gaap_EarningsPerShareTextBlock_4B4A8E47A840DFD28483D47EA7469FC1" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_FE75693ECFA1ECDDE4B5D47EA8A39F01_verboseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_FE75693ECFA1ECDDE4B5D47EA8A39F01" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Commitments and Contingent Liabilities [Text Block]</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_FE75693ECFA1ECDDE4B5D47EA8A39F01_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_FE75693ECFA1ECDDE4B5D47EA8A39F01" 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_FE75693ECFA1ECDDE4B5D47EA8A39F01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_FE75693ECFA1ECDDE4B5D47EA8A39F01" xlink:to="lab_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_FE75693ECFA1ECDDE4B5D47EA8A39F01" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationDisclosureTextBlock_39B9434A5656DFEB403ED47EA7754384_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationDisclosureTextBlock_39B9434A5656DFEB403ED47EA7754384" 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_39B9434A5656DFEB403ED47EA7754384_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationDisclosureTextBlock_39B9434A5656DFEB403ED47EA7754384" 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_39B9434A5656DFEB403ED47EA7754384" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationDisclosureTextBlock_39B9434A5656DFEB403ED47EA7754384" xlink:to="lab_us-gaap_BusinessCombinationDisclosureTextBlock_39B9434A5656DFEB403ED47EA7754384" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_FD6B004CBB08938A5AC5D47EA6BACBD4_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_FD6B004CBB08938A5AC5D47EA6BACBD4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Contracts [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_FD6B004CBB08938A5AC5D47EA6BACBD4_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_FD6B004CBB08938A5AC5D47EA6BACBD4" 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_FD6B004CBB08938A5AC5D47EA6BACBD4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_FD6B004CBB08938A5AC5D47EA6BACBD4" xlink:to="lab_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_FD6B004CBB08938A5AC5D47EA6BACBD4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_34EAFB48B009B777AD8CD47EA6BA6BC1_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_34EAFB48B009B777AD8CD47EA6BA6BC1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (Loss) in Statement of Earnings [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_34EAFB48B009B777AD8CD47EA6BA6BC1_label_en-US" xlink:label="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_34EAFB48B009B777AD8CD47EA6BA6BC1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instruments, Gain (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_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_34EAFB48B009B777AD8CD47EA6BA6BC1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_34EAFB48B009B777AD8CD47EA6BA6BC1" xlink:to="lab_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_34EAFB48B009B777AD8CD47EA6BA6BC1" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_E4CDAE472821A505D0BCD47EA8B2091C_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_E4CDAE472821A505D0BCD47EA8B2091C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reportable Segments [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_E4CDAE472821A505D0BCD47EA8B2091C_label_en-US" xlink:label="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_E4CDAE472821A505D0BCD47EA8B2091C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [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_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_E4CDAE472821A505D0BCD47EA8B2091C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_E4CDAE472821A505D0BCD47EA8B2091C" xlink:to="lab_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_E4CDAE472821A505D0BCD47EA8B2091C" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_9C1FAAB1424A04E6B2BFD47EA756ACB6_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_9C1FAAB1424A04E6B2BFD47EA756ACB6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Assets And Liabilities Measured On A Recurring Basis [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_9C1FAAB1424A04E6B2BFD47EA756ACB6_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_9C1FAAB1424A04E6B2BFD47EA756ACB6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [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_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_9C1FAAB1424A04E6B2BFD47EA756ACB6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_9C1FAAB1424A04E6B2BFD47EA756ACB6" xlink:to="lab_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_9C1FAAB1424A04E6B2BFD47EA756ACB6" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_5DFFEB2A92FD7358188FD47EA756AA10_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_5DFFEB2A92FD7358188FD47EA756AA10" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Assets Measured On Recurring Basis, Significant Unobservable Inputs [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_5DFFEB2A92FD7358188FD47EA756AA10_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_5DFFEB2A92FD7358188FD47EA756AA10" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value, Assets Measured on Recurring Basis, Unobservable Input 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_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_5DFFEB2A92FD7358188FD47EA756AA10" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_5DFFEB2A92FD7358188FD47EA756AA10" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_5DFFEB2A92FD7358188FD47EA756AA10" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueInputsFairValueMeasuredOnRecurringBasisQuantitativeInformationTableTextBlock_F6A121C5D1EAAFA2E240D47EA756DBC9_terseLabel_en-US" xlink:label="lab_bokf_FairValueInputsFairValueMeasuredOnRecurringBasisQuantitativeInformationTableTextBlock_F6A121C5D1EAAFA2E240D47EA756DBC9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Inputs, Fair Value Measured On a Recurring Basis, Quantitative Information [Table Text Block]</link:label>
    <link:label id="lab_bokf_FairValueInputsFairValueMeasuredOnRecurringBasisQuantitativeInformationTableTextBlock_F6A121C5D1EAAFA2E240D47EA756DBC9_label_en-US" xlink:label="lab_bokf_FairValueInputsFairValueMeasuredOnRecurringBasisQuantitativeInformationTableTextBlock_F6A121C5D1EAAFA2E240D47EA756DBC9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Inputs, Fair Value Measured On a Recurring Basis, Quantitative Information [Table Text Block]</link:label>
    <link:label id="lab_bokf_FairValueInputsFairValueMeasuredOnRecurringBasisQuantitativeInformationTableTextBlock_F6A121C5D1EAAFA2E240D47EA756DBC9_documentation_en-US" xlink:label="lab_bokf_FairValueInputsFairValueMeasuredOnRecurringBasisQuantitativeInformationTableTextBlock_F6A121C5D1EAAFA2E240D47EA756DBC9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value Inputs, Fair Value Measured On a Recurring Basis, Quantitative Information [Table Text Block]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueInputsFairValueMeasuredOnRecurringBasisQuantitativeInformationTableTextBlock" xlink:label="loc_bokf_FairValueInputsFairValueMeasuredOnRecurringBasisQuantitativeInformationTableTextBlock_F6A121C5D1EAAFA2E240D47EA756DBC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueInputsFairValueMeasuredOnRecurringBasisQuantitativeInformationTableTextBlock_F6A121C5D1EAAFA2E240D47EA756DBC9" xlink:to="lab_bokf_FairValueInputsFairValueMeasuredOnRecurringBasisQuantitativeInformationTableTextBlock_F6A121C5D1EAAFA2E240D47EA756DBC9" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_BDFB9F82E2E68DCE2A36D47EA7561374_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_BDFB9F82E2E68DCE2A36D47EA7561374" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Assets Measured on Nonrecurring Basis [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_BDFB9F82E2E68DCE2A36D47EA7561374_label_en-US" xlink:label="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_BDFB9F82E2E68DCE2A36D47EA7561374" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurements, Nonrecurring [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_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_BDFB9F82E2E68DCE2A36D47EA7561374" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_BDFB9F82E2E68DCE2A36D47EA7561374" xlink:to="lab_us-gaap_FairValueAssetsMeasuredOnNonrecurringBasisTextBlock_BDFB9F82E2E68DCE2A36D47EA7561374" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueInputsFairValueMeasuredOnNonrecurringBasisQuantitativeInformationTableTextBlock_DB791B743B611FEADEBED47EA75679F7_terseLabel_en-US" xlink:label="lab_bokf_FairValueInputsFairValueMeasuredOnNonrecurringBasisQuantitativeInformationTableTextBlock_DB791B743B611FEADEBED47EA75679F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block]</link:label>
    <link:label id="lab_bokf_FairValueInputsFairValueMeasuredOnNonrecurringBasisQuantitativeInformationTableTextBlock_DB791B743B611FEADEBED47EA75679F7_label_en-US" xlink:label="lab_bokf_FairValueInputsFairValueMeasuredOnNonrecurringBasisQuantitativeInformationTableTextBlock_DB791B743B611FEADEBED47EA75679F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block]</link:label>
    <link:label id="lab_bokf_FairValueInputsFairValueMeasuredOnNonrecurringBasisQuantitativeInformationTableTextBlock_DB791B743B611FEADEBED47EA75679F7_documentation_en-US" xlink:label="lab_bokf_FairValueInputsFairValueMeasuredOnNonrecurringBasisQuantitativeInformationTableTextBlock_DB791B743B611FEADEBED47EA75679F7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueInputsFairValueMeasuredOnNonrecurringBasisQuantitativeInformationTableTextBlock" xlink:label="loc_bokf_FairValueInputsFairValueMeasuredOnNonrecurringBasisQuantitativeInformationTableTextBlock_DB791B743B611FEADEBED47EA75679F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueInputsFairValueMeasuredOnNonrecurringBasisQuantitativeInformationTableTextBlock_DB791B743B611FEADEBED47EA75679F7" xlink:to="lab_bokf_FairValueInputsFairValueMeasuredOnNonrecurringBasisQuantitativeInformationTableTextBlock_DB791B743B611FEADEBED47EA75679F7" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_C5530819F814977502B0D47EA7567176_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_C5530819F814977502B0D47EA7567176" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fair Value of Financial Instruments [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_C5530819F814977502B0D47EA7567176_label_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_C5530819F814977502B0D47EA7567176" 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_C5530819F814977502B0D47EA7567176" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTextBlock_C5530819F814977502B0D47EA7567176" xlink:to="lab_us-gaap_FairValueByBalanceSheetGroupingTextBlock_C5530819F814977502B0D47EA7567176" xlink:type="arc" />
    <link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_5C8E1C977A76B104D7FAD47EA7754B2E_terseLabel_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_5C8E1C977A76B104D7FAD47EA7754B2E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Basis of Accounting, Policy [Policy Text Block]</link:label>
    <link:label id="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_5C8E1C977A76B104D7FAD47EA7754B2E_label_en-US" xlink:label="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_5C8E1C977A76B104D7FAD47EA7754B2E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Basis of Accounting, 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_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_5C8E1C977A76B104D7FAD47EA7754B2E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_5C8E1C977A76B104D7FAD47EA7754B2E" xlink:to="lab_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_5C8E1C977A76B104D7FAD47EA7754B2E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConsolidationPolicyTextBlock_2C99A245B3D1FB0CB1CED47EA775BB80_terseLabel_en-US" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock_2C99A245B3D1FB0CB1CED47EA775BB80" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Principles of Consolidation [Policy Text Block]</link:label>
    <link:label id="lab_us-gaap_ConsolidationPolicyTextBlock_2C99A245B3D1FB0CB1CED47EA775BB80_label_en-US" xlink:label="lab_us-gaap_ConsolidationPolicyTextBlock_2C99A245B3D1FB0CB1CED47EA775BB80" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Consolidation, 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_ConsolidationPolicyTextBlock" xlink:label="loc_us-gaap_ConsolidationPolicyTextBlock_2C99A245B3D1FB0CB1CED47EA775BB80" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConsolidationPolicyTextBlock_2C99A245B3D1FB0CB1CED47EA775BB80" xlink:to="lab_us-gaap_ConsolidationPolicyTextBlock_2C99A245B3D1FB0CB1CED47EA775BB80" xlink:type="arc" />
    <link:label id="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription_0FB0DB6DFA385269A833D47EA775E8F3_terseLabel_en-US" xlink:label="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription_0FB0DB6DFA385269A833D47EA775E8F3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reclassification, Policy [Policy Text Block]</link:label>
    <link:label id="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription_0FB0DB6DFA385269A833D47EA775E8F3_label_en-US" xlink:label="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription_0FB0DB6DFA385269A833D47EA775E8F3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Reclassification, 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_PriorPeriodReclassificationAdjustmentDescription" xlink:label="loc_us-gaap_PriorPeriodReclassificationAdjustmentDescription_0FB0DB6DFA385269A833D47EA775E8F3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PriorPeriodReclassificationAdjustmentDescription_0FB0DB6DFA385269A833D47EA775E8F3" xlink:to="lab_us-gaap_PriorPeriodReclassificationAdjustmentDescription_0FB0DB6DFA385269A833D47EA775E8F3" xlink:type="arc" />
    <link:label id="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_62C08C360495383F5379D47EA775B546_verboseLabel_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_62C08C360495383F5379D47EA775B546" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Newly Adopted and Pending Accounting Policies [Policy Text Block]</link:label>
    <link:label id="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_62C08C360495383F5379D47EA775B546_label_en-US" xlink:label="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_62C08C360495383F5379D47EA775B546" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New Accounting Pronouncements, 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_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_62C08C360495383F5379D47EA775B546" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_62C08C360495383F5379D47EA775B546" xlink:to="lab_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_62C08C360495383F5379D47EA775B546" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativesPolicyTextBlock_726C0E738AED8FD428A2D47EA7757E7D_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativesPolicyTextBlock_726C0E738AED8FD428A2D47EA7757E7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivatives, Policy [Policy Text Block]</link:label>
    <link:label id="lab_us-gaap_DerivativesPolicyTextBlock_726C0E738AED8FD428A2D47EA7757E7D_label_en-US" xlink:label="lab_us-gaap_DerivativesPolicyTextBlock_726C0E738AED8FD428A2D47EA7757E7D" 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_726C0E738AED8FD428A2D47EA7757E7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativesPolicyTextBlock_726C0E738AED8FD428A2D47EA7757E7D" xlink:to="lab_us-gaap_DerivativesPolicyTextBlock_726C0E738AED8FD428A2D47EA7757E7D" xlink:type="arc" />
    <link:label id="lab_us-gaap_PolicyLoansReceivablePolicy_A441B10A0F3173998E0DD47EA7755E89_terseLabel_en-US" xlink:label="lab_us-gaap_PolicyLoansReceivablePolicy_A441B10A0F3173998E0DD47EA7755E89" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Allowances for Credit Losses, Loans [Policy Text Block]</link:label>
    <link:label id="lab_us-gaap_PolicyLoansReceivablePolicy_A441B10A0F3173998E0DD47EA7755E89_label_en-US" xlink:label="lab_us-gaap_PolicyLoansReceivablePolicy_A441B10A0F3173998E0DD47EA7755E89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Policy Loans 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_PolicyLoansReceivablePolicy" xlink:label="loc_us-gaap_PolicyLoansReceivablePolicy_A441B10A0F3173998E0DD47EA7755E89" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PolicyLoansReceivablePolicy_A441B10A0F3173998E0DD47EA7755E89" xlink:to="lab_us-gaap_PolicyLoansReceivablePolicy_A441B10A0F3173998E0DD47EA7755E89" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_5EDDA6D27EEABCF53500D47EA775147B_verboseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_5EDDA6D27EEABCF53500D47EA775147B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Loans and Allowances for Credit Losses, Allowances for Credit Losses [Policy Text Block]</link:label>
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_5EDDA6D27EEABCF53500D47EA775147B_label_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_5EDDA6D27EEABCF53500D47EA775147B" 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_5EDDA6D27EEABCF53500D47EA775147B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_5EDDA6D27EEABCF53500D47EA775147B" xlink:to="lab_us-gaap_LoansAndLeasesReceivableAllowanceForLoanLossesPolicy_5EDDA6D27EEABCF53500D47EA775147B" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueRecognitionPolicyTextBlock_8C0EEB71063AED6AD6A6D47EA775E02E_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueRecognitionPolicyTextBlock_8C0EEB71063AED6AD6A6D47EA775E02E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue Recognition, Policy [Policy Text Block]</link:label>
    <link:label id="lab_us-gaap_RevenueRecognitionPolicyTextBlock_8C0EEB71063AED6AD6A6D47EA775E02E_label_en-US" xlink:label="lab_us-gaap_RevenueRecognitionPolicyTextBlock_8C0EEB71063AED6AD6A6D47EA775E02E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue Recognition, 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_RevenueRecognitionPolicyTextBlock" xlink:label="loc_us-gaap_RevenueRecognitionPolicyTextBlock_8C0EEB71063AED6AD6A6D47EA775E02E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueRecognitionPolicyTextBlock_8C0EEB71063AED6AD6A6D47EA775E02E" xlink:to="lab_us-gaap_RevenueRecognitionPolicyTextBlock_8C0EEB71063AED6AD6A6D47EA775E02E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_0E550E4A0D1FCFA9E09FD47EA86EC423_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_0E550E4A0D1FCFA9E09FD47EA86EC423" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_0E550E4A0D1FCFA9E09FD47EA86EC423_label_en-US" xlink:label="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_0E550E4A0D1FCFA9E09FD47EA86EC423" 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_0E550E4A0D1FCFA9E09FD47EA86EC423" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_0E550E4A0D1FCFA9E09FD47EA86EC423" xlink:to="lab_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_0E550E4A0D1FCFA9E09FD47EA86EC423" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfCashFlowsAbstract_8F963FC87C9F107684E4C55E4C788BF9_label_en-US" xlink:label="lab_us-gaap_StatementOfCashFlowsAbstract_8F963FC87C9F107684E4C55E4C788BF9" 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_8F963FC87C9F107684E4C55E4C788BF9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_8F963FC87C9F107684E4C55E4C788BF9" xlink:to="lab_us-gaap_StatementOfCashFlowsAbstract_8F963FC87C9F107684E4C55E4C788BF9" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_9FAF0B74BEA80D5DDA7BC55E4C787D8D_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_9FAF0B74BEA80D5DDA7BC55E4C787D8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash Flows From Operating Activities: [Abstract]</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_9FAF0B74BEA80D5DDA7BC55E4C787D8D_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_9FAF0B74BEA80D5DDA7BC55E4C787D8D" 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_9FAF0B74BEA80D5DDA7BC55E4C787D8D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_9FAF0B74BEA80D5DDA7BC55E4C787D8D" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_9FAF0B74BEA80D5DDA7BC55E4C787D8D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_617DC51640DBEB0A311FC55E4C787853_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_617DC51640DBEB0A311FC55E4C787853" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Adjustments to reconcile net income to net cash used in operating activities:</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_617DC51640DBEB0A311FC55E4C787853_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_617DC51640DBEB0A311FC55E4C787853" 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_617DC51640DBEB0A311FC55E4C787853" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_617DC51640DBEB0A311FC55E4C787853" xlink:to="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_617DC51640DBEB0A311FC55E4C787853" xlink:type="arc" />
    <link:label id="lab_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_3DCC29BD0DBAD13E34A5C55E4C781310_terseLabel_en-US" xlink:label="lab_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_3DCC29BD0DBAD13E34A5C55E4C781310" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value of mortgage servicing rights due to market changes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MortgageServicingRightsMSRImpairmentRecovery" xlink:label="loc_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_3DCC29BD0DBAD13E34A5C55E4C781310" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_3DCC29BD0DBAD13E34A5C55E4C781310" xlink:to="lab_us-gaap_MortgageServicingRightsMSRImpairmentRecovery_3DCC29BD0DBAD13E34A5C55E4C781310" xlink:type="arc" />
    <link:label id="lab_bokf_Changeinfairvalueofmortgageservicingrightsduetoloanrunoff_5C428515C08CB03366BEC55E4C7892AA_terseLabel_en-US" xlink:label="lab_bokf_Changeinfairvalueofmortgageservicingrightsduetoloanrunoff_5C428515C08CB03366BEC55E4C7892AA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in the fair value of mortgage servicing rights due to principal payments</link:label>
    <link:label id="lab_bokf_Changeinfairvalueofmortgageservicingrightsduetoloanrunoff_5C428515C08CB03366BEC55E4C7892AA_label_en-US" xlink:label="lab_bokf_Changeinfairvalueofmortgageservicingrightsduetoloanrunoff_5C428515C08CB03366BEC55E4C7892AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in fair value of mortgage servicing rights due to loan runoff</link:label>
    <link:label id="lab_bokf_Changeinfairvalueofmortgageservicingrightsduetoloanrunoff_5C428515C08CB03366BEC55E4C7892AA_documentation_en-US" xlink:label="lab_bokf_Changeinfairvalueofmortgageservicingrightsduetoloanrunoff_5C428515C08CB03366BEC55E4C7892AA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the non-cash decrease in net pre-tax net income related to the change in fair value of mortgage servicing rights due to loan runoff</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Changeinfairvalueofmortgageservicingrightsduetoloanrunoff" xlink:label="loc_bokf_Changeinfairvalueofmortgageservicingrightsduetoloanrunoff_5C428515C08CB03366BEC55E4C7892AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Changeinfairvalueofmortgageservicingrightsduetoloanrunoff_5C428515C08CB03366BEC55E4C7892AA" xlink:to="lab_bokf_Changeinfairvalueofmortgageservicingrightsduetoloanrunoff_5C428515C08CB03366BEC55E4C7892AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_3B6B75625E8ABC0D2396C55E4C78BDE4_negatedLabel_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives_3B6B75625E8ABC0D2396C55E4C78BDE4" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net unrealized losses (gains) from derivative contracts</link:label>
    <link:label id="lab_us-gaap_UnrealizedGainLossOnDerivatives_3B6B75625E8ABC0D2396C55E4C78BDE4_label_en-US" xlink:label="lab_us-gaap_UnrealizedGainLossOnDerivatives_3B6B75625E8ABC0D2396C55E4C78BDE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unrealized Gain (Loss) on Derivatives</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives_3B6B75625E8ABC0D2396C55E4C78BDE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnrealizedGainLossOnDerivatives_3B6B75625E8ABC0D2396C55E4C78BDE4" xlink:to="lab_us-gaap_UnrealizedGainLossOnDerivatives_3B6B75625E8ABC0D2396C55E4C78BDE4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ShareBasedCompensation_E8B5E17D98B0E29C94E9C55E4C786AF3_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_E8B5E17D98B0E29C94E9C55E4C786AF3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based compensation</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensation_E8B5E17D98B0E29C94E9C55E4C786AF3_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_E8B5E17D98B0E29C94E9C55E4C786AF3" 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_E8B5E17D98B0E29C94E9C55E4C786AF3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ShareBasedCompensation_E8B5E17D98B0E29C94E9C55E4C786AF3" xlink:to="lab_us-gaap_ShareBasedCompensation_E8B5E17D98B0E29C94E9C55E4C786AF3" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepreciationAmortizationAndAccretionNet_F9644D1B377A86BEA516C55E4C78882D_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationAmortizationAndAccretionNet_F9644D1B377A86BEA516C55E4C78882D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation and amortization</link:label>
    <link:label id="lab_us-gaap_DepreciationAmortizationAndAccretionNet_F9644D1B377A86BEA516C55E4C78882D_label_en-US" xlink:label="lab_us-gaap_DepreciationAmortizationAndAccretionNet_F9644D1B377A86BEA516C55E4C78882D" 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_F9644D1B377A86BEA516C55E4C78882D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationAmortizationAndAccretionNet_F9644D1B377A86BEA516C55E4C78882D" xlink:to="lab_us-gaap_DepreciationAmortizationAndAccretionNet_F9644D1B377A86BEA516C55E4C78882D" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_BCB6778688CA45DDD14FC55E4C78BCB4_negatedLabel_en-US" xlink:label="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_BCB6778688CA45DDD14FC55E4C78BCB4" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net amortization of securities discounts and premiums</link:label>
    <link:label id="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_BCB6778688CA45DDD14FC55E4C78BCB4_label_en-US" xlink:label="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_BCB6778688CA45DDD14FC55E4C78BCB4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accretion (Amortization) of Discounts and Premiums, Investments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_BCB6778688CA45DDD14FC55E4C78BCB4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_BCB6778688CA45DDD14FC55E4C78BCB4" xlink:to="lab_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_BCB6778688CA45DDD14FC55E4C78BCB4" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealizedInvestmentGainsLosses_4DA44140C4FF8E893D85C55E4C789EF2_negatedLabel_en-US" xlink:label="lab_us-gaap_RealizedInvestmentGainsLosses_4DA44140C4FF8E893D85C55E4C789EF2" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net losses (gains) on financial instruments and other losses (gains), net</link:label>
    <link:label id="lab_us-gaap_RealizedInvestmentGainsLosses_4DA44140C4FF8E893D85C55E4C789EF2_label_en-US" xlink:label="lab_us-gaap_RealizedInvestmentGainsLosses_4DA44140C4FF8E893D85C55E4C789EF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Realized Investment Gains (Losses)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="loc_us-gaap_RealizedInvestmentGainsLosses_4DA44140C4FF8E893D85C55E4C789EF2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealizedInvestmentGainsLosses_4DA44140C4FF8E893D85C55E4C789EF2" xlink:to="lab_us-gaap_RealizedInvestmentGainsLosses_4DA44140C4FF8E893D85C55E4C789EF2" xlink:type="arc" />
    <link:label id="lab_bokf_Netgainonmortgageloansheldforsale_27FC0F63EF43C6DCCE9FC55E4C78DD20_negatedLabel_en-US" xlink:label="lab_bokf_Netgainonmortgageloansheldforsale_27FC0F63EF43C6DCCE9FC55E4C78DD20" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net gain on mortgage loans held for sale</link:label>
    <link:label id="lab_bokf_Netgainonmortgageloansheldforsale_27FC0F63EF43C6DCCE9FC55E4C78DD20_label_en-US" xlink:label="lab_bokf_Netgainonmortgageloansheldforsale_27FC0F63EF43C6DCCE9FC55E4C78DD20" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net gain on mortgage loans held for sale</link:label>
    <link:label id="lab_bokf_Netgainonmortgageloansheldforsale_27FC0F63EF43C6DCCE9FC55E4C78DD20_documentation_en-US" xlink:label="lab_bokf_Netgainonmortgageloansheldforsale_27FC0F63EF43C6DCCE9FC55E4C78DD20" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the combined realized net gain from sale of residential mortgage loans and the change in the unrealized net gain on mortgage loans held for sale during the period.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Netgainonmortgageloansheldforsale" xlink:label="loc_bokf_Netgainonmortgageloansheldforsale_27FC0F63EF43C6DCCE9FC55E4C78DD20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Netgainonmortgageloansheldforsale_27FC0F63EF43C6DCCE9FC55E4C78DD20" xlink:to="lab_bokf_Netgainonmortgageloansheldforsale_27FC0F63EF43C6DCCE9FC55E4C78DD20" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_9D854C6D99C99D6824CEC55E4C786A9F_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_9D854C6D99C99D6824CEC55E4C786A9F" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Mortgage loans originated for sale</link:label>
    <link:label id="lab_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_9D854C6D99C99D6824CEC55E4C786A9F_label_en-US" xlink:label="lab_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_9D854C6D99C99D6824CEC55E4C786A9F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Origination of Mortgage 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_PaymentsForOriginationOfMortgageLoansHeldForSale" xlink:label="loc_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_9D854C6D99C99D6824CEC55E4C786A9F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_9D854C6D99C99D6824CEC55E4C786A9F" xlink:to="lab_us-gaap_PaymentsForOriginationOfMortgageLoansHeldForSale_9D854C6D99C99D6824CEC55E4C786A9F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_28A8959BA987F32E4135C55E4C78546B_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_28A8959BA987F32E4135C55E4C78546B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of mortgage loans held for sale</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_28A8959BA987F32E4135C55E4C78546B_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_28A8959BA987F32E4135C55E4C78546B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Mortgage 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_ProceedsFromSaleOfMortgageLoansHeldForSale" xlink:label="loc_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_28A8959BA987F32E4135C55E4C78546B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_28A8959BA987F32E4135C55E4C78546B" xlink:to="lab_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_28A8959BA987F32E4135C55E4C78546B" xlink:type="arc" />
    <link:label id="lab_bokf_Capitalizedmortgageservicingrights_FCD803BDBA60E789C2F6C55E4C78C508_negatedTerseLabel_en-US" xlink:label="lab_bokf_Capitalizedmortgageservicingrights_FCD803BDBA60E789C2F6C55E4C78C508" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Capitalized mortgage servicing rights</link:label>
    <link:label id="lab_bokf_Capitalizedmortgageservicingrights_FCD803BDBA60E789C2F6C55E4C78C508_label_en-US" xlink:label="lab_bokf_Capitalizedmortgageservicingrights_FCD803BDBA60E789C2F6C55E4C78C508" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Capitalized mortgage servicing rights</link:label>
    <link:label id="lab_bokf_Capitalizedmortgageservicingrights_FCD803BDBA60E789C2F6C55E4C78C508_documentation_en-US" xlink:label="lab_bokf_Capitalizedmortgageservicingrights_FCD803BDBA60E789C2F6C55E4C78C508" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents non-cash adjustment to reconcile net income related to capitalization of mortgage servicing rights.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Capitalizedmortgageservicingrights" xlink:label="loc_bokf_Capitalizedmortgageservicingrights_FCD803BDBA60E789C2F6C55E4C78C508" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Capitalizedmortgageservicingrights_FCD803BDBA60E789C2F6C55E4C78C508" xlink:to="lab_bokf_Capitalizedmortgageservicingrights_FCD803BDBA60E789C2F6C55E4C78C508" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInTradingSecurities_9682094D7C07FEF733F0C55E4C784BA3_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInTradingSecurities_9682094D7C07FEF733F0C55E4C784BA3" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Change in trading and fair value option securities</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInTradingSecurities_9682094D7C07FEF733F0C55E4C784BA3_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInTradingSecurities_9682094D7C07FEF733F0C55E4C784BA3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Debt Securities, Trading, and 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_IncreaseDecreaseInTradingSecurities" xlink:label="loc_us-gaap_IncreaseDecreaseInTradingSecurities_9682094D7C07FEF733F0C55E4C784BA3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInTradingSecurities_9682094D7C07FEF733F0C55E4C784BA3" xlink:to="lab_us-gaap_IncreaseDecreaseInTradingSecurities_9682094D7C07FEF733F0C55E4C784BA3" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInReceivables_02B37C9EBDB5D9462334C55E4C78D95F_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInReceivables_02B37C9EBDB5D9462334C55E4C78D95F" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Change in receivables</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInReceivables_02B37C9EBDB5D9462334C55E4C78D95F_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInReceivables_02B37C9EBDB5D9462334C55E4C78D95F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Receivables</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInReceivables_02B37C9EBDB5D9462334C55E4C78D95F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInReceivables_02B37C9EBDB5D9462334C55E4C78D95F" xlink:to="lab_us-gaap_IncreaseDecreaseInReceivables_02B37C9EBDB5D9462334C55E4C78D95F" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_27462AFF9DC0732F9541C55E4C78AE18_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_27462AFF9DC0732F9541C55E4C78AE18" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Change in other assets</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_27462AFF9DC0732F9541C55E4C78AE18_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_27462AFF9DC0732F9541C55E4C78AE18" 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_27462AFF9DC0732F9541C55E4C78AE18" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_27462AFF9DC0732F9541C55E4C78AE18" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingAssets_27462AFF9DC0732F9541C55E4C78AE18" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_D1C479D4FEE21BFB3FA8C55E4C78B28D_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_D1C479D4FEE21BFB3FA8C55E4C78B28D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in accrued interest, taxes and expense</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_D1C479D4FEE21BFB3FA8C55E4C78B28D_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_D1C479D4FEE21BFB3FA8C55E4C78B28D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Accounts Payable and Accrued Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_D1C479D4FEE21BFB3FA8C55E4C78B28D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_D1C479D4FEE21BFB3FA8C55E4C78B28D" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_D1C479D4FEE21BFB3FA8C55E4C78B28D" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_E3908A1372A0DB85BCC5C55E4C7899A6_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_E3908A1372A0DB85BCC5C55E4C7899A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in other liabilities</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_E3908A1372A0DB85BCC5C55E4C7899A6_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_E3908A1372A0DB85BCC5C55E4C7899A6" 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_E3908A1372A0DB85BCC5C55E4C7899A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_E3908A1372A0DB85BCC5C55E4C7899A6" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_E3908A1372A0DB85BCC5C55E4C7899A6" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_9B304645DD4E7ADB6728C55E4C7846B9_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_9B304645DD4E7ADB6728C55E4C7846B9" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_9B304645DD4E7ADB6728C55E4C7846B9_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_9B304645DD4E7ADB6728C55E4C7846B9" 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_9B304645DD4E7ADB6728C55E4C7846B9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9B304645DD4E7ADB6728C55E4C7846B9" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_9B304645DD4E7ADB6728C55E4C7846B9" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6DA1C76A5E823B4D60D1C55E4C78CE51_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6DA1C76A5E823B4D60D1C55E4C78CE51" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash Flows From Investing Activities: [Abstract]</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6DA1C76A5E823B4D60D1C55E4C78CE51_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6DA1C76A5E823B4D60D1C55E4C78CE51" 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_6DA1C76A5E823B4D60D1C55E4C78CE51" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6DA1C76A5E823B4D60D1C55E4C78CE51" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_6DA1C76A5E823B4D60D1C55E4C78CE51" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_04B83B8F3C28628B93B5C55E4C786DE2_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_04B83B8F3C28628B93B5C55E4C786DE2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from maturities or redemptions of investment securities</link:label>
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_04B83B8F3C28628B93B5C55E4C786DE2_label_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_04B83B8F3C28628B93B5C55E4C786DE2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_04B83B8F3C28628B93B5C55E4C786DE2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_04B83B8F3C28628B93B5C55E4C786DE2" xlink:to="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_04B83B8F3C28628B93B5C55E4C786DE2" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_DFEA0BD88EC6A1321C5CC55E4C7869D1_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_DFEA0BD88EC6A1321C5CC55E4C7869D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from maturities or redemptions of available for sale securities</link:label>
    <link:label id="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_DFEA0BD88EC6A1321C5CC55E4C7869D1_label_en-US" xlink:label="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_DFEA0BD88EC6A1321C5CC55E4C7869D1" 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_DFEA0BD88EC6A1321C5CC55E4C7869D1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_DFEA0BD88EC6A1321C5CC55E4C7869D1" xlink:to="lab_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_DFEA0BD88EC6A1321C5CC55E4C7869D1" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_1B7D434F255E2130955DC55E4C785BD8_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_1B7D434F255E2130955DC55E4C785BD8" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchases of investment securities</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_1B7D434F255E2130955DC55E4C785BD8_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_1B7D434F255E2130955DC55E4C785BD8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Held-to-maturity Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireHeldToMaturitySecurities" xlink:label="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_1B7D434F255E2130955DC55E4C785BD8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_1B7D434F255E2130955DC55E4C785BD8" xlink:to="lab_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_1B7D434F255E2130955DC55E4C785BD8" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_67A244650A26AA954332C55E4EE94720_terseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_67A244650A26AA954332C55E4EE94720" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Payments to Acquire Debt Securities, Available-for-sale</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_67A244650A26AA954332C55E4EE94720_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_67A244650A26AA954332C55E4EE94720" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire 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_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_67A244650A26AA954332C55E4EE94720" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_67A244650A26AA954332C55E4EE94720" xlink:to="lab_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_67A244650A26AA954332C55E4EE94720" xlink:type="arc" />
    <link:label id="lab_bokf_ChangeInAmountReceivableOnUnsettledSecurityTransactions_55F13BCFA945EBD7DFC9C55E4C783BD4_verboseLabel_en-US" xlink:label="lab_bokf_ChangeInAmountReceivableOnUnsettledSecurityTransactions_55F13BCFA945EBD7DFC9C55E4C783BD4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Change in amount receivable on unsettled available for sale securities transactions</link:label>
    <link:label id="lab_bokf_ChangeInAmountReceivableOnUnsettledSecurityTransactions_55F13BCFA945EBD7DFC9C55E4C783BD4_label_en-US" xlink:label="lab_bokf_ChangeInAmountReceivableOnUnsettledSecurityTransactions_55F13BCFA945EBD7DFC9C55E4C783BD4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in amount receivable on unsettled security transactions</link:label>
    <link:label id="lab_bokf_ChangeInAmountReceivableOnUnsettledSecurityTransactions_55F13BCFA945EBD7DFC9C55E4C783BD4_documentation_en-US" xlink:label="lab_bokf_ChangeInAmountReceivableOnUnsettledSecurityTransactions_55F13BCFA945EBD7DFC9C55E4C783BD4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Change in amount receivable on unsettled security transactions. This is an investing cash flow.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ChangeInAmountReceivableOnUnsettledSecurityTransactions" xlink:label="loc_bokf_ChangeInAmountReceivableOnUnsettledSecurityTransactions_55F13BCFA945EBD7DFC9C55E4C783BD4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ChangeInAmountReceivableOnUnsettledSecurityTransactions_55F13BCFA945EBD7DFC9C55E4C783BD4" xlink:to="lab_bokf_ChangeInAmountReceivableOnUnsettledSecurityTransactions_55F13BCFA945EBD7DFC9C55E4C783BD4" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForProceedsFromLoansAndLeases_A1096434C562B5C8982AC55E4C78101E_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromLoansAndLeases_A1096434C562B5C8982AC55E4C78101E" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Loans originated, net of principal collected</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromLoansAndLeases_A1096434C562B5C8982AC55E4C78101E_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromLoansAndLeases_A1096434C562B5C8982AC55E4C78101E" 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_A1096434C562B5C8982AC55E4C78101E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromLoansAndLeases_A1096434C562B5C8982AC55E4C78101E" xlink:to="lab_us-gaap_PaymentsForProceedsFromLoansAndLeases_A1096434C562B5C8982AC55E4C78101E" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities_68499A1862ACB12E4359C55E4C788295_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities_68499A1862ACB12E4359C55E4C788295" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Net payments on derivative asset contracts</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities_68499A1862ACB12E4359C55E4C788295_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities_68499A1862ACB12E4359C55E4C788295" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Derivative Instrument, Investing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities_68499A1862ACB12E4359C55E4C788295" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities_68499A1862ACB12E4359C55E4C788295" xlink:to="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities_68499A1862ACB12E4359C55E4C788295" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_D3B76628ECAF18510CEBC55E4C78ED03_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_D3B76628ECAF18510CEBC55E4C78ED03" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Acquisitions, net of cash acquired</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_D3B76628ECAF18510CEBC55E4C78ED03_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_D3B76628ECAF18510CEBC55E4C78ED03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Businesses, Net of Cash Acquired</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_D3B76628ECAF18510CEBC55E4C78ED03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_D3B76628ECAF18510CEBC55E4C78ED03" xlink:to="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_D3B76628ECAF18510CEBC55E4C78ED03" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfProductiveAssets_55BB7A00EC351797DFCDC55E4C78C850_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfProductiveAssets_55BB7A00EC351797DFCDC55E4C78C850" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from disposition of assets</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfProductiveAssets_55BB7A00EC351797DFCDC55E4C78C850_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfProductiveAssets_55BB7A00EC351797DFCDC55E4C78C850" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Productive Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_55BB7A00EC351797DFCDC55E4C78C850" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_55BB7A00EC351797DFCDC55E4C78C850" xlink:to="lab_us-gaap_ProceedsFromSaleOfProductiveAssets_55BB7A00EC351797DFCDC55E4C78C850" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireProductiveAssets_58314B6ED0F591AD2C35C55E4C780E1C_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireProductiveAssets_58314B6ED0F591AD2C35C55E4C780E1C" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchases of assets</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireProductiveAssets_58314B6ED0F591AD2C35C55E4C780E1C_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireProductiveAssets_58314B6ED0F591AD2C35C55E4C780E1C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Productive Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_58314B6ED0F591AD2C35C55E4C780E1C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireProductiveAssets_58314B6ED0F591AD2C35C55E4C780E1C" xlink:to="lab_us-gaap_PaymentsToAcquireProductiveAssets_58314B6ED0F591AD2C35C55E4C780E1C" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_122EA288BA33F0A777D1C55E4C78E925_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_122EA288BA33F0A777D1C55E4C78E925" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used in) investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_122EA288BA33F0A777D1C55E4C78E925_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_122EA288BA33F0A777D1C55E4C78E925" 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_122EA288BA33F0A777D1C55E4C78E925" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_122EA288BA33F0A777D1C55E4C78E925" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_122EA288BA33F0A777D1C55E4C78E925" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_9DF678183926965CB59AC55E4C78675B_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_9DF678183926965CB59AC55E4C78675B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash Flows From Financing Activities: [Abstract]</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_9DF678183926965CB59AC55E4C78675B_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_9DF678183926965CB59AC55E4C78675B" 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_9DF678183926965CB59AC55E4C78675B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_9DF678183926965CB59AC55E4C78675B" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_9DF678183926965CB59AC55E4C78675B" xlink:type="arc" />
    <link:label id="lab_bokf_NetChangeInDemandDepositsTransactionDepositsAndSavingsAccounts_D775117288EB16D8A37CC55E4C876C49_terseLabel_en-US" xlink:label="lab_bokf_NetChangeInDemandDepositsTransactionDepositsAndSavingsAccounts_D775117288EB16D8A37CC55E4C876C49" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in demand deposits, transaction deposits and savings accounts</link:label>
    <link:label id="lab_bokf_NetChangeInDemandDepositsTransactionDepositsAndSavingsAccounts_D775117288EB16D8A37CC55E4C876C49_label_en-US" xlink:label="lab_bokf_NetChangeInDemandDepositsTransactionDepositsAndSavingsAccounts_D775117288EB16D8A37CC55E4C876C49" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net change in demand deposits, transaction deposits and savings accounts</link:label>
    <link:label id="lab_bokf_NetChangeInDemandDepositsTransactionDepositsAndSavingsAccounts_D775117288EB16D8A37CC55E4C876C49_documentation_en-US" xlink:label="lab_bokf_NetChangeInDemandDepositsTransactionDepositsAndSavingsAccounts_D775117288EB16D8A37CC55E4C876C49" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Net change in demand deposits, transaction deposits and savings accounts</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NetChangeInDemandDepositsTransactionDepositsAndSavingsAccounts" xlink:label="loc_bokf_NetChangeInDemandDepositsTransactionDepositsAndSavingsAccounts_D775117288EB16D8A37CC55E4C876C49" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NetChangeInDemandDepositsTransactionDepositsAndSavingsAccounts_D775117288EB16D8A37CC55E4C876C49" xlink:to="lab_bokf_NetChangeInDemandDepositsTransactionDepositsAndSavingsAccounts_D775117288EB16D8A37CC55E4C876C49" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInTimeDeposits_9F4D1BD1CA8D34B2A19AC55E4C877DCD_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInTimeDeposits_9F4D1BD1CA8D34B2A19AC55E4C877DCD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in time deposits</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInTimeDeposits_9F4D1BD1CA8D34B2A19AC55E4C877DCD_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInTimeDeposits_9F4D1BD1CA8D34B2A19AC55E4C877DCD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Time Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInTimeDeposits" xlink:label="loc_us-gaap_IncreaseDecreaseInTimeDeposits_9F4D1BD1CA8D34B2A19AC55E4C877DCD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInTimeDeposits_9F4D1BD1CA8D34B2A19AC55E4C877DCD" xlink:to="lab_us-gaap_IncreaseDecreaseInTimeDeposits_9F4D1BD1CA8D34B2A19AC55E4C877DCD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromRepaymentsOfDebt_F67D62A73A14F8B4D34AC55E4C876462_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfDebt_F67D62A73A14F8B4D34AC55E4C876462" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in other borrowed funds</link:label>
    <link:label id="lab_us-gaap_ProceedsFromRepaymentsOfDebt_F67D62A73A14F8B4D34AC55E4C876462_label_en-US" xlink:label="lab_us-gaap_ProceedsFromRepaymentsOfDebt_F67D62A73A14F8B4D34AC55E4C876462" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from (Repayments of) Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfDebt" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfDebt_F67D62A73A14F8B4D34AC55E4C876462" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromRepaymentsOfDebt_F67D62A73A14F8B4D34AC55E4C876462" xlink:to="lab_us-gaap_ProceedsFromRepaymentsOfDebt_F67D62A73A14F8B4D34AC55E4C876462" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities_50BDDCF57705C0CFBC3CC55E4C874FFB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities_50BDDCF57705C0CFBC3CC55E4C874FFB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Net proceeds on derivative liability contracts</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities_50BDDCF57705C0CFBC3CC55E4C874FFB_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities_50BDDCF57705C0CFBC3CC55E4C874FFB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Derivative Instrument, Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities" xlink:label="loc_us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities_50BDDCF57705C0CFBC3CC55E4C874FFB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities_50BDDCF57705C0CFBC3CC55E4C874FFB" xlink:to="lab_us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities_50BDDCF57705C0CFBC3CC55E4C874FFB" xlink:type="arc" />
    <link:label id="lab_bokf_NetChangeInDerivativeMarginAccounts_868A7F2E2E4EEAF8BC6EC55E4C8778FE_terseLabel_en-US" xlink:label="lab_bokf_NetChangeInDerivativeMarginAccounts_868A7F2E2E4EEAF8BC6EC55E4C8778FE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in derivative margin accounts</link:label>
    <link:label id="lab_bokf_NetChangeInDerivativeMarginAccounts_868A7F2E2E4EEAF8BC6EC55E4C8778FE_label_en-US" xlink:label="lab_bokf_NetChangeInDerivativeMarginAccounts_868A7F2E2E4EEAF8BC6EC55E4C8778FE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net change in derivative margin accounts</link:label>
    <link:label id="lab_bokf_NetChangeInDerivativeMarginAccounts_868A7F2E2E4EEAF8BC6EC55E4C8778FE_documentation_en-US" xlink:label="lab_bokf_NetChangeInDerivativeMarginAccounts_868A7F2E2E4EEAF8BC6EC55E4C8778FE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The net change in derivative margin accounts.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NetChangeInDerivativeMarginAccounts" xlink:label="loc_bokf_NetChangeInDerivativeMarginAccounts_868A7F2E2E4EEAF8BC6EC55E4C8778FE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NetChangeInDerivativeMarginAccounts_868A7F2E2E4EEAF8BC6EC55E4C8778FE" xlink:to="lab_bokf_NetChangeInDerivativeMarginAccounts_868A7F2E2E4EEAF8BC6EC55E4C8778FE" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_652CBDAF0DA78465AF28C55E4C876C14_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_652CBDAF0DA78465AF28C55E4C876C14" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in amount due on unsettled available for sale securities transactions</link:label>
    <link:label id="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_652CBDAF0DA78465AF28C55E4C876C14_label_en-US" xlink:label="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_652CBDAF0DA78465AF28C55E4C876C14" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from (Payments for) Other Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_652CBDAF0DA78465AF28C55E4C876C14" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_652CBDAF0DA78465AF28C55E4C876C14" xlink:to="lab_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_652CBDAF0DA78465AF28C55E4C876C14" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_DE9DDA0F541E573E4E44C55E4C87DB17_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_DE9DDA0F541E573E4E44C55E4C87DB17" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Issuance of common and treasury stock, net</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_DE9DDA0F541E573E4E44C55E4C87DB17_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_DE9DDA0F541E573E4E44C55E4C87DB17" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance 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_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_DE9DDA0F541E573E4E44C55E4C87DB17" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_DE9DDA0F541E573E4E44C55E4C87DB17" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_DE9DDA0F541E573E4E44C55E4C87DB17" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_B99411609EA216E177AFC55E4C8753C5_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_B99411609EA216E177AFC55E4C8753C5" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repurchase of common stock</link:label>
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_B99411609EA216E177AFC55E4C8753C5_label_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_B99411609EA216E177AFC55E4C8753C5" 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_B99411609EA216E177AFC55E4C8753C5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_B99411609EA216E177AFC55E4C8753C5" xlink:to="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_B99411609EA216E177AFC55E4C8753C5" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_048CB2973536DEB54642C55E4C8727BB_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_048CB2973536DEB54642C55E4C8727BB" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Dividends paid</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_048CB2973536DEB54642C55E4C8727BB_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_048CB2973536DEB54642C55E4C8727BB" 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_048CB2973536DEB54642C55E4C8727BB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividendsCommonStock_048CB2973536DEB54642C55E4C8727BB" xlink:to="lab_us-gaap_PaymentsOfDividendsCommonStock_048CB2973536DEB54642C55E4C8727BB" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_0AD271B9C9372ABEB4ACC55E4C871191_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_0AD271B9C9372ABEB4ACC55E4C871191" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used in) financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_0AD271B9C9372ABEB4ACC55E4C871191_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_0AD271B9C9372ABEB4ACC55E4C871191" 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_0AD271B9C9372ABEB4ACC55E4C871191" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_0AD271B9C9372ABEB4ACC55E4C871191" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_0AD271B9C9372ABEB4ACC55E4C871191" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DF78ED3665C3C49B55BEC55E4C878009_totalLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DF78ED3665C3C49B55BEC55E4C878009" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net decrease in cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DF78ED3665C3C49B55BEC55E4C878009_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DF78ED3665C3C49B55BEC55E4C878009" 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_DF78ED3665C3C49B55BEC55E4C878009" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DF78ED3665C3C49B55BEC55E4C878009" xlink:to="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_DF78ED3665C3C49B55BEC55E4C878009" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_A48795A22BB7846E59FCC55E4C87E194_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_A48795A22BB7846E59FCC55E4C87E194" 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:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_A48795A22BB7846E59FCC55E4C87E194_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_A48795A22BB7846E59FCC55E4C87E194" 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_A48795A22BB7846E59FCC55E4C87E194" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_A48795A22BB7846E59FCC55E4C87E194" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_A48795A22BB7846E59FCC55E4C87E194" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_4ADA95B9D180629DD0FBC55E4C870D8C_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_4ADA95B9D180629DD0FBC55E4C870D8C" 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_4ADA95B9D180629DD0FBC55E4C870D8C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_4ADA95B9D180629DD0FBC55E4C870D8C" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_4ADA95B9D180629DD0FBC55E4C870D8C" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_F76F05FED07515528A66C55E4C87CD9A_terseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_F76F05FED07515528A66C55E4C87CD9A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information: [Abstract]</link:label>
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_F76F05FED07515528A66C55E4C87CD9A_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_F76F05FED07515528A66C55E4C87CD9A" 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_F76F05FED07515528A66C55E4C87CD9A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_F76F05FED07515528A66C55E4C87CD9A" xlink:to="lab_us-gaap_SupplementalCashFlowInformationAbstract_F76F05FED07515528A66C55E4C87CD9A" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestPaidNet_0A9B0FC327DF18089D33C55E4C875AF8_terseLabel_en-US" xlink:label="lab_us-gaap_InterestPaidNet_0A9B0FC327DF18089D33C55E4C875AF8" 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_0A9B0FC327DF18089D33C55E4C875AF8_label_en-US" xlink:label="lab_us-gaap_InterestPaidNet_0A9B0FC327DF18089D33C55E4C875AF8" 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_0A9B0FC327DF18089D33C55E4C875AF8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPaidNet_0A9B0FC327DF18089D33C55E4C875AF8" xlink:to="lab_us-gaap_InterestPaidNet_0A9B0FC327DF18089D33C55E4C875AF8" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_306D8CAB3503500318A0C55E4C87D566_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_306D8CAB3503500318A0C55E4C87D566" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash paid for taxes</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesPaidNet_306D8CAB3503500318A0C55E4C87D566_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesPaidNet_306D8CAB3503500318A0C55E4C87D566" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Paid, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_306D8CAB3503500318A0C55E4C87D566" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_306D8CAB3503500318A0C55E4C87D566" xlink:to="lab_us-gaap_IncomeTaxesPaidNet_306D8CAB3503500318A0C55E4C87D566" xlink:type="arc" />
    <link:label id="lab_us-gaap_TransferToOtherRealEstate_4A05E613040B740EB3E8C55E4C87B0CA_terseLabel_en-US" xlink:label="lab_us-gaap_TransferToOtherRealEstate_4A05E613040B740EB3E8C55E4C87B0CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net loans and bank premises transferred to repossessed real estate and other assets</link:label>
    <link:label id="lab_us-gaap_TransferToOtherRealEstate_4A05E613040B740EB3E8C55E4C87B0CA_label_en-US" xlink:label="lab_us-gaap_TransferToOtherRealEstate_4A05E613040B740EB3E8C55E4C87B0CA" 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_4A05E613040B740EB3E8C55E4C87B0CA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TransferToOtherRealEstate_4A05E613040B740EB3E8C55E4C87B0CA" xlink:to="lab_us-gaap_TransferToOtherRealEstate_4A05E613040B740EB3E8C55E4C87B0CA" xlink:type="arc" />
    <link:label id="lab_bokf_IncreaseInUSGovernmentGuaranteedLoansEligibleForRepurchase_384CC1E4B1625255CABFC55E4C873786_terseLabel_en-US" xlink:label="lab_bokf_IncreaseInUSGovernmentGuaranteedLoansEligibleForRepurchase_384CC1E4B1625255CABFC55E4C873786" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period</link:label>
    <link:label id="lab_bokf_IncreaseInUSGovernmentGuaranteedLoansEligibleForRepurchase_384CC1E4B1625255CABFC55E4C873786_label_en-US" xlink:label="lab_bokf_IncreaseInUSGovernmentGuaranteedLoansEligibleForRepurchase_384CC1E4B1625255CABFC55E4C873786" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase in U.S. government guaranteed loans eligible for repurchase</link:label>
    <link:label id="lab_bokf_IncreaseInUSGovernmentGuaranteedLoansEligibleForRepurchase_384CC1E4B1625255CABFC55E4C873786_documentation_en-US" xlink:label="lab_bokf_IncreaseInUSGovernmentGuaranteedLoansEligibleForRepurchase_384CC1E4B1625255CABFC55E4C873786" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the non-cash increase in loans related to the right but not the obligation to repurchases loans previously sold into Ginnie Mae pools based on certain criteria and as such has effectively regained control of the asset and must recognize the loan on the balance sheet.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_IncreaseInUSGovernmentGuaranteedLoansEligibleForRepurchase" xlink:label="loc_bokf_IncreaseInUSGovernmentGuaranteedLoansEligibleForRepurchase_384CC1E4B1625255CABFC55E4C873786" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_IncreaseInUSGovernmentGuaranteedLoansEligibleForRepurchase_384CC1E4B1625255CABFC55E4C873786" xlink:to="lab_bokf_IncreaseInUSGovernmentGuaranteedLoansEligibleForRepurchase_384CC1E4B1625255CABFC55E4C873786" xlink:type="arc" />
    <link:label id="lab_bokf_ConveyanceOfOtherRealEstateOwnedGuaranteedByUsGovt_F395A98A23E2835A4BB2C55E4C87F4DB_terseLabel_en-US" xlink:label="lab_bokf_ConveyanceOfOtherRealEstateOwnedGuaranteedByUsGovt_F395A98A23E2835A4BB2C55E4C87F4DB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Conveyance of other real estate owned guaranteed by U.S. government agencies</link:label>
    <link:label id="lab_bokf_ConveyanceOfOtherRealEstateOwnedGuaranteedByUsGovt_F395A98A23E2835A4BB2C55E4C87F4DB_label_en-US" xlink:label="lab_bokf_ConveyanceOfOtherRealEstateOwnedGuaranteedByUsGovt_F395A98A23E2835A4BB2C55E4C87F4DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Conveyance of other real estate owned guaranteed by US govt</link:label>
    <link:label id="lab_bokf_ConveyanceOfOtherRealEstateOwnedGuaranteedByUsGovt_F395A98A23E2835A4BB2C55E4C87F4DB_documentation_en-US" xlink:label="lab_bokf_ConveyanceOfOtherRealEstateOwnedGuaranteedByUsGovt_F395A98A23E2835A4BB2C55E4C87F4DB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents non-cash conveyance of other real estate owned guaranteed by U.S. government agencies during period.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ConveyanceOfOtherRealEstateOwnedGuaranteedByUsGovt" xlink:label="loc_bokf_ConveyanceOfOtherRealEstateOwnedGuaranteedByUsGovt_F395A98A23E2835A4BB2C55E4C87F4DB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ConveyanceOfOtherRealEstateOwnedGuaranteedByUsGovt_F395A98A23E2835A4BB2C55E4C87F4DB" xlink:to="lab_bokf_ConveyanceOfOtherRealEstateOwnedGuaranteedByUsGovt_F395A98A23E2835A4BB2C55E4C87F4DB" xlink:type="arc" />
    <link:label id="lab_bokf_LoansAndAllowanceForCreditLossesAbstract_BAAE1D2FEDB5CCD9BD32D47EA83329B0_label_en-US" xlink:label="lab_bokf_LoansAndAllowanceForCreditLossesAbstract_BAAE1D2FEDB5CCD9BD32D47EA83329B0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans and Allowance for Credit Losses [Abstract]</link:label>
    <link:label id="lab_bokf_LoansAndAllowanceForCreditLossesAbstract_BAAE1D2FEDB5CCD9BD32D47EA83329B0_documentation_en-US" xlink:label="lab_bokf_LoansAndAllowanceForCreditLossesAbstract_BAAE1D2FEDB5CCD9BD32D47EA83329B0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans and Allowance for Credit Losses [Abstract]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_LoansAndAllowanceForCreditLossesAbstract" xlink:label="loc_bokf_LoansAndAllowanceForCreditLossesAbstract_BAAE1D2FEDB5CCD9BD32D47EA83329B0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_LoansAndAllowanceForCreditLossesAbstract_BAAE1D2FEDB5CCD9BD32D47EA83329B0" xlink:to="lab_bokf_LoansAndAllowanceForCreditLossesAbstract_BAAE1D2FEDB5CCD9BD32D47EA83329B0" xlink:type="arc" />
    <link:label id="lab_bokf_LoansNumberOfDaysPastDueForNonRiskGradedLoanToBePlacedOnNonaccruingStatus_D2BC0D18078DF41E8D08D47EA8341D43_terseLabel_en-US" xlink:label="lab_bokf_LoansNumberOfDaysPastDueForNonRiskGradedLoanToBePlacedOnNonaccruingStatus_D2BC0D18078DF41E8D08D47EA8341D43" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans, Number of Days Past Due for a Non-Risk Graded Loan to be Placed on Nonaccruing Status</link:label>
    <link:label id="lab_bokf_LoansNumberOfDaysPastDueForNonRiskGradedLoanToBePlacedOnNonaccruingStatus_D2BC0D18078DF41E8D08D47EA8341D43_label_en-US" xlink:label="lab_bokf_LoansNumberOfDaysPastDueForNonRiskGradedLoanToBePlacedOnNonaccruingStatus_D2BC0D18078DF41E8D08D47EA8341D43" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans, Number of Days Past Due for a Non-Risk Graded Loan to be Placed on Nonaccruing Status</link:label>
    <link:label id="lab_bokf_LoansNumberOfDaysPastDueForNonRiskGradedLoanToBePlacedOnNonaccruingStatus_D2BC0D18078DF41E8D08D47EA8341D43_documentation_en-US" xlink:label="lab_bokf_LoansNumberOfDaysPastDueForNonRiskGradedLoanToBePlacedOnNonaccruingStatus_D2BC0D18078DF41E8D08D47EA8341D43" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the number of days past due a non-risk graded loan has to be in order to be placed on nonaccruing status.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_LoansNumberOfDaysPastDueForNonRiskGradedLoanToBePlacedOnNonaccruingStatus" xlink:label="loc_bokf_LoansNumberOfDaysPastDueForNonRiskGradedLoanToBePlacedOnNonaccruingStatus_D2BC0D18078DF41E8D08D47EA8341D43" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_LoansNumberOfDaysPastDueForNonRiskGradedLoanToBePlacedOnNonaccruingStatus_D2BC0D18078DF41E8D08D47EA8341D43" xlink:to="lab_bokf_LoansNumberOfDaysPastDueForNonRiskGradedLoanToBePlacedOnNonaccruingStatus_D2BC0D18078DF41E8D08D47EA8341D43" xlink:type="arc" />
    <link:label id="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsPlacedOnNonaccruingStatus_0E62D3E09D0A4DAF5302D47EA834C959_terseLabel_en-US" xlink:label="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsPlacedOnNonaccruingStatus_0E62D3E09D0A4DAF5302D47EA834C959" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Placed on Nonaccruing Status</link:label>
    <link:label id="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsPlacedOnNonaccruingStatus_0E62D3E09D0A4DAF5302D47EA834C959_label_en-US" xlink:label="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsPlacedOnNonaccruingStatus_0E62D3E09D0A4DAF5302D47EA834C959" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Placed on Nonaccruing Status</link:label>
    <link:label id="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsPlacedOnNonaccruingStatus_0E62D3E09D0A4DAF5302D47EA834C959_documentation_en-US" xlink:label="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsPlacedOnNonaccruingStatus_0E62D3E09D0A4DAF5302D47EA834C959" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The number of days following notification of a borrowers Chapter 7 bankruptcy that a non-risk graded loan is placed on nonaccruing status.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsPlacedOnNonaccruingStatus" xlink:label="loc_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsPlacedOnNonaccruingStatus_0E62D3E09D0A4DAF5302D47EA834C959" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsPlacedOnNonaccruingStatus_0E62D3E09D0A4DAF5302D47EA834C959" xlink:to="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsPlacedOnNonaccruingStatus_0E62D3E09D0A4DAF5302D47EA834C959" xlink:type="arc" />
    <link:label id="lab_bokf_MinimumNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_9DF02F9A7117980FE2C5D47EA8340324_terseLabel_en-US" xlink:label="lab_bokf_MinimumNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_9DF02F9A7117980FE2C5D47EA8340324" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Allowances for Credit Losses, Minimum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off</link:label>
    <link:label id="lab_bokf_MinimumNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_9DF02F9A7117980FE2C5D47EA8340324_label_en-US" xlink:label="lab_bokf_MinimumNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_9DF02F9A7117980FE2C5D47EA8340324" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off</link:label>
    <link:label id="lab_bokf_MinimumNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_9DF02F9A7117980FE2C5D47EA8340324_documentation_en-US" xlink:label="lab_bokf_MinimumNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_9DF02F9A7117980FE2C5D47EA8340324" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Minimum number of days after which past due non-risk graded loans are charged off</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MinimumNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff" xlink:label="loc_bokf_MinimumNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_9DF02F9A7117980FE2C5D47EA8340324" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MinimumNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_9DF02F9A7117980FE2C5D47EA8340324" xlink:to="lab_bokf_MinimumNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_9DF02F9A7117980FE2C5D47EA8340324" xlink:type="arc" />
    <link:label id="lab_bokf_MaxNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_586248774CDF27190D05D47EA834EDB1_terseLabel_en-US" xlink:label="lab_bokf_MaxNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_586248774CDF27190D05D47EA834EDB1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans and Allowances for Credit Losses, Maximum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off</link:label>
    <link:label id="lab_bokf_MaxNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_586248774CDF27190D05D47EA834EDB1_label_en-US" xlink:label="lab_bokf_MaxNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_586248774CDF27190D05D47EA834EDB1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Max No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off</link:label>
    <link:label id="lab_bokf_MaxNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_586248774CDF27190D05D47EA834EDB1_documentation_en-US" xlink:label="lab_bokf_MaxNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_586248774CDF27190D05D47EA834EDB1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maximum number of days after which past due non-risk graded loans are charged off</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MaxNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff" xlink:label="loc_bokf_MaxNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_586248774CDF27190D05D47EA834EDB1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MaxNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_586248774CDF27190D05D47EA834EDB1" xlink:to="lab_bokf_MaxNoOfDaysAfterWhichPastDueNonRiskGradedLoansAreChargedOff_586248774CDF27190D05D47EA834EDB1" xlink:type="arc" />
    <link:label id="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsChargedOff_024F2984D2F3DA69149AD47EA834582B_terseLabel_en-US" xlink:label="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsChargedOff_024F2984D2F3DA69149AD47EA834582B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Charged Off</link:label>
    <link:label id="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsChargedOff_024F2984D2F3DA69149AD47EA834582B_label_en-US" xlink:label="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsChargedOff_024F2984D2F3DA69149AD47EA834582B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Charged Off</link:label>
    <link:label id="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsChargedOff_024F2984D2F3DA69149AD47EA834582B_documentation_en-US" xlink:label="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsChargedOff_024F2984D2F3DA69149AD47EA834582B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the number of days after notification of Chapter 7 bankruptcy for a non-risk graded loan to be charged off</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsChargedOff" xlink:label="loc_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsChargedOff_024F2984D2F3DA69149AD47EA834582B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsChargedOff_024F2984D2F3DA69149AD47EA834582B" xlink:to="lab_bokf_LoansNumberOfDaysAfterNotificationOfChapter7BankruptcyNonRiskGradedLoanIsChargedOff_024F2984D2F3DA69149AD47EA834582B" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventsAbstract_607E6EE735236D57EBFED47EA8847FA6_label_en-US" xlink:label="lab_us-gaap_SubsequentEventsAbstract_607E6EE735236D57EBFED47EA8847FA6" 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_607E6EE735236D57EBFED47EA8847FA6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsAbstract_607E6EE735236D57EBFED47EA8847FA6" xlink:to="lab_us-gaap_SubsequentEventsAbstract_607E6EE735236D57EBFED47EA8847FA6" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubsequentEventsTextBlock_EAE73F5444453D54E313D47EA8844CF4_verboseLabel_en-US" xlink:label="lab_us-gaap_SubsequentEventsTextBlock_EAE73F5444453D54E313D47EA8844CF4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Subsequent Events [Text Block]</link:label>
    <link:label id="lab_us-gaap_SubsequentEventsTextBlock_EAE73F5444453D54E313D47EA8844CF4_label_en-US" xlink:label="lab_us-gaap_SubsequentEventsTextBlock_EAE73F5444453D54E313D47EA8844CF4" 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_EAE73F5444453D54E313D47EA8844CF4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubsequentEventsTextBlock_EAE73F5444453D54E313D47EA8844CF4" xlink:to="lab_us-gaap_SubsequentEventsTextBlock_EAE73F5444453D54E313D47EA8844CF4" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_149C5D519B7353AB3D6DD47EA711D441_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_149C5D519B7353AB3D6DD47EA711D441" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Fees and Commissions Revenue [Text Block]</link:label>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_149C5D519B7353AB3D6DD47EA711D441_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_149C5D519B7353AB3D6DD47EA711D441" 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_149C5D519B7353AB3D6DD47EA711D441" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerTextBlock_149C5D519B7353AB3D6DD47EA711D441" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerTextBlock_149C5D519B7353AB3D6DD47EA711D441" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_82A8E8A4A4A61136D4B0D47EA6BAA611_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_82A8E8A4A4A61136D4B0D47EA6BAA611" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Tax Disclosure [Text Block]</link:label>
    <link:label id="lab_us-gaap_IncomeTaxDisclosureTextBlock_82A8E8A4A4A61136D4B0D47EA6BAA611_label_en-US" xlink:label="lab_us-gaap_IncomeTaxDisclosureTextBlock_82A8E8A4A4A61136D4B0D47EA6BAA611" 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_82A8E8A4A4A61136D4B0D47EA6BAA611" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxDisclosureTextBlock_82A8E8A4A4A61136D4B0D47EA6BAA611" xlink:to="lab_us-gaap_IncomeTaxDisclosureTextBlock_82A8E8A4A4A61136D4B0D47EA6BAA611" xlink:type="arc" />
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldForSaleTableTextBlock_5EEF8A739309CD00F11DD47EA8B294CB_verboseLabel_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldForSaleTableTextBlock_5EEF8A739309CD00F11DD47EA8B294CB" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Components of Residential Mortgage Loans Held For Sale [Table Text Block]</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldForSaleTableTextBlock_5EEF8A739309CD00F11DD47EA8B294CB_label_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldForSaleTableTextBlock_5EEF8A739309CD00F11DD47EA8B294CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Mortgage Loans Held For Sale [Table Text Block]</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldForSaleTableTextBlock_5EEF8A739309CD00F11DD47EA8B294CB_documentation_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldForSaleTableTextBlock_5EEF8A739309CD00F11DD47EA8B294CB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of mortgage loans to individuals not classified as held for investment but are held-for-sale.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ResidentialMortgageLoansHeldForSaleTableTextBlock" xlink:label="loc_bokf_ResidentialMortgageLoansHeldForSaleTableTextBlock_5EEF8A739309CD00F11DD47EA8B294CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ResidentialMortgageLoansHeldForSaleTableTextBlock_5EEF8A739309CD00F11DD47EA8B294CB" xlink:to="lab_bokf_ResidentialMortgageLoansHeldForSaleTableTextBlock_5EEF8A739309CD00F11DD47EA8B294CB" xlink:type="arc" />
    <link:label id="lab_bokf_MortgageBankingRevenueTableTextBlock_346103248F0F769D96C1D47EA8B20AE4_terseLabel_en-US" xlink:label="lab_bokf_MortgageBankingRevenueTableTextBlock_346103248F0F769D96C1D47EA8B20AE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mortgage Banking Revenue [Table Text Block]</link:label>
    <link:label id="lab_bokf_MortgageBankingRevenueTableTextBlock_346103248F0F769D96C1D47EA8B20AE4_label_en-US" xlink:label="lab_bokf_MortgageBankingRevenueTableTextBlock_346103248F0F769D96C1D47EA8B20AE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Banking Revenue [Table Text Block]</link:label>
    <link:label id="lab_bokf_MortgageBankingRevenueTableTextBlock_346103248F0F769D96C1D47EA8B20AE4_documentation_en-US" xlink:label="lab_bokf_MortgageBankingRevenueTableTextBlock_346103248F0F769D96C1D47EA8B20AE4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mortgage Banking Revenue [Table Text Block]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MortgageBankingRevenueTableTextBlock" xlink:label="loc_bokf_MortgageBankingRevenueTableTextBlock_346103248F0F769D96C1D47EA8B20AE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MortgageBankingRevenueTableTextBlock_346103248F0F769D96C1D47EA8B20AE4" xlink:to="lab_bokf_MortgageBankingRevenueTableTextBlock_346103248F0F769D96C1D47EA8B20AE4" xlink:type="arc" />
    <link:label id="lab_bokf_SummaryOfMortgageServicingRightsTableTextBlock_00F7D7225CA865E94BAAD47EA8B264FD_verboseLabel_en-US" xlink:label="lab_bokf_SummaryOfMortgageServicingRightsTableTextBlock_00F7D7225CA865E94BAAD47EA8B264FD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Summary of Mortgage Servicing Rights [Table Text Block]</link:label>
    <link:label id="lab_bokf_SummaryOfMortgageServicingRightsTableTextBlock_00F7D7225CA865E94BAAD47EA8B264FD_label_en-US" xlink:label="lab_bokf_SummaryOfMortgageServicingRightsTableTextBlock_00F7D7225CA865E94BAAD47EA8B264FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Summary of Mortgage Servicing Rights [Table Text Block]</link:label>
    <link:label id="lab_bokf_SummaryOfMortgageServicingRightsTableTextBlock_00F7D7225CA865E94BAAD47EA8B264FD_documentation_en-US" xlink:label="lab_bokf_SummaryOfMortgageServicingRightsTableTextBlock_00F7D7225CA865E94BAAD47EA8B264FD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of the summary of residential mortgage servicing rights as measured at balance sheet date.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_SummaryOfMortgageServicingRightsTableTextBlock" xlink:label="loc_bokf_SummaryOfMortgageServicingRightsTableTextBlock_00F7D7225CA865E94BAAD47EA8B264FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_SummaryOfMortgageServicingRightsTableTextBlock_00F7D7225CA865E94BAAD47EA8B264FD" xlink:to="lab_bokf_SummaryOfMortgageServicingRightsTableTextBlock_00F7D7225CA865E94BAAD47EA8B264FD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock_A56243FA40E55D6B48FDD47EA8B2C204_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock_A56243FA40E55D6B48FDD47EA8B2C204" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Activity in Capitalized Mortgage Servicing Rights [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock_A56243FA40E55D6B48FDD47EA8B2C204_label_en-US" xlink:label="lab_us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock_A56243FA40E55D6B48FDD47EA8B2C204" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Servicing Assets at 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_ScheduleOfServicingAssetsAtFairValueTextBlock" xlink:label="loc_us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock_A56243FA40E55D6B48FDD47EA8B2C204" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock_A56243FA40E55D6B48FDD47EA8B2C204" xlink:to="lab_us-gaap_ScheduleOfServicingAssetsAtFairValueTextBlock_A56243FA40E55D6B48FDD47EA8B2C204" xlink:type="arc" />
    <link:label id="lab_bokf_AssumptionsToValueMortgageServicingRightsTableTextBlock_7E74248899923C074C93D47EA8B27414_terseLabel_en-US" xlink:label="lab_bokf_AssumptionsToValueMortgageServicingRightsTableTextBlock_7E74248899923C074C93D47EA8B27414" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Assumptions to Value Mortgage Servicing Rights [Table Text Block]</link:label>
    <link:label id="lab_bokf_AssumptionsToValueMortgageServicingRightsTableTextBlock_7E74248899923C074C93D47EA8B27414_label_en-US" xlink:label="lab_bokf_AssumptionsToValueMortgageServicingRightsTableTextBlock_7E74248899923C074C93D47EA8B27414" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assumptions to Value Mortgage Servicing Rights [Table Text Block]</link:label>
    <link:label id="lab_bokf_AssumptionsToValueMortgageServicingRightsTableTextBlock_7E74248899923C074C93D47EA8B27414_documentation_en-US" xlink:label="lab_bokf_AssumptionsToValueMortgageServicingRightsTableTextBlock_7E74248899923C074C93D47EA8B27414" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Assumptions to Value Mortgage Servicing Rights [Table Text Block]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_AssumptionsToValueMortgageServicingRightsTableTextBlock" xlink:label="loc_bokf_AssumptionsToValueMortgageServicingRightsTableTextBlock_7E74248899923C074C93D47EA8B27414" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_AssumptionsToValueMortgageServicingRightsTableTextBlock_7E74248899923C074C93D47EA8B27414" xlink:to="lab_bokf_AssumptionsToValueMortgageServicingRightsTableTextBlock_7E74248899923C074C93D47EA8B27414" xlink:type="arc" />
    <link:label id="lab_bokf_AgingStatusOfMortgageLoansServicedForOthersTableTextBlock_31080AE8FD448FFDA033D47EA8B208AE_verboseLabel_en-US" xlink:label="lab_bokf_AgingStatusOfMortgageLoansServicedForOthersTableTextBlock_31080AE8FD448FFDA033D47EA8B208AE" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Aging Status of Mortgage Loans Serviced For Others [Table Text Block]</link:label>
    <link:label id="lab_bokf_AgingStatusOfMortgageLoansServicedForOthersTableTextBlock_31080AE8FD448FFDA033D47EA8B208AE_label_en-US" xlink:label="lab_bokf_AgingStatusOfMortgageLoansServicedForOthersTableTextBlock_31080AE8FD448FFDA033D47EA8B208AE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Aging Status of Mortgage Loans Serviced For Others [Table Text Block]</link:label>
    <link:label id="lab_bokf_AgingStatusOfMortgageLoansServicedForOthersTableTextBlock_31080AE8FD448FFDA033D47EA8B208AE_documentation_en-US" xlink:label="lab_bokf_AgingStatusOfMortgageLoansServicedForOthersTableTextBlock_31080AE8FD448FFDA033D47EA8B208AE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tabular disclosure of all Mortgage Loans Serviced For Others by aging status.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_AgingStatusOfMortgageLoansServicedForOthersTableTextBlock" xlink:label="loc_bokf_AgingStatusOfMortgageLoansServicedForOthersTableTextBlock_31080AE8FD448FFDA033D47EA8B208AE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_AgingStatusOfMortgageLoansServicedForOthersTableTextBlock_31080AE8FD448FFDA033D47EA8B208AE" xlink:to="lab_bokf_AgingStatusOfMortgageLoansServicedForOthersTableTextBlock_31080AE8FD448FFDA033D47EA8B208AE" xlink:type="arc" />
    <link:label id="lab_bokf_SummaryOfMortgageServicingRightsAbstract_EE9FD3EF783ACE4F371AD47EA711B838_terseLabel_en-US" xlink:label="lab_bokf_SummaryOfMortgageServicingRightsAbstract_EE9FD3EF783ACE4F371AD47EA711B838" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of Mortgage Servicing Rights [Abstract]</link:label>
    <link:label id="lab_bokf_SummaryOfMortgageServicingRightsAbstract_EE9FD3EF783ACE4F371AD47EA711B838_label_en-US" xlink:label="lab_bokf_SummaryOfMortgageServicingRightsAbstract_EE9FD3EF783ACE4F371AD47EA711B838" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Summary of Mortgage Servicing Rights [Abstract]</link:label>
    <link:label id="lab_bokf_SummaryOfMortgageServicingRightsAbstract_EE9FD3EF783ACE4F371AD47EA711B838_documentation_en-US" xlink:label="lab_bokf_SummaryOfMortgageServicingRightsAbstract_EE9FD3EF783ACE4F371AD47EA711B838" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_SummaryOfMortgageServicingRightsAbstract" xlink:label="loc_bokf_SummaryOfMortgageServicingRightsAbstract_EE9FD3EF783ACE4F371AD47EA711B838" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_SummaryOfMortgageServicingRightsAbstract_EE9FD3EF783ACE4F371AD47EA711B838" xlink:to="lab_bokf_SummaryOfMortgageServicingRightsAbstract_EE9FD3EF783ACE4F371AD47EA711B838" xlink:type="arc" />
    <link:label id="lab_bokf_ResidentialMortgageLoansServicedNumberOfLoans_586F08F272536221BE93D47EA711A49C_verboseLabel_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansServicedNumberOfLoans_586F08F272536221BE93D47EA711A49C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of residential mortgage loans serviced for others</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansServicedNumberOfLoans_586F08F272536221BE93D47EA711A49C_label_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansServicedNumberOfLoans_586F08F272536221BE93D47EA711A49C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Mortgage Loans Serviced Number Of Loans</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansServicedNumberOfLoans_586F08F272536221BE93D47EA711A49C_documentation_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansServicedNumberOfLoans_586F08F272536221BE93D47EA711A49C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Indicates the number of mortgage loans being serviced.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ResidentialMortgageLoansServicedNumberOfLoans" xlink:label="loc_bokf_ResidentialMortgageLoansServicedNumberOfLoans_586F08F272536221BE93D47EA711A49C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ResidentialMortgageLoansServicedNumberOfLoans_586F08F272536221BE93D47EA711A49C" xlink:to="lab_bokf_ResidentialMortgageLoansServicedNumberOfLoans_586F08F272536221BE93D47EA711A49C" xlink:type="arc" />
    <link:label id="lab_bokf_ResidentialMortgageLoansServicedOutstandingPrincipal_7B0D97B1132EDED8ED41D47EA7113836_verboseLabel_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansServicedOutstandingPrincipal_7B0D97B1132EDED8ED41D47EA7113836" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Outstanding principal balance of residential mortgage loans serviced for others</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansServicedOutstandingPrincipal_7B0D97B1132EDED8ED41D47EA7113836_label_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansServicedOutstandingPrincipal_7B0D97B1132EDED8ED41D47EA7113836" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Mortgage Loans Serviced Outstanding Principal</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansServicedOutstandingPrincipal_7B0D97B1132EDED8ED41D47EA7113836_documentation_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansServicedOutstandingPrincipal_7B0D97B1132EDED8ED41D47EA7113836" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Dollar amount of principal outstanding on mortgage loans being serviced.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ResidentialMortgageLoansServicedOutstandingPrincipal" xlink:label="loc_bokf_ResidentialMortgageLoansServicedOutstandingPrincipal_7B0D97B1132EDED8ED41D47EA7113836" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ResidentialMortgageLoansServicedOutstandingPrincipal_7B0D97B1132EDED8ED41D47EA7113836" xlink:to="lab_bokf_ResidentialMortgageLoansServicedOutstandingPrincipal_7B0D97B1132EDED8ED41D47EA7113836" xlink:type="arc" />
    <link:label id="lab_bokf_WeightedAverageInterestRateofLoansServicedforOthers_491180B2E9A0352F5EFED47EA711AD21_terseLabel_en-US" xlink:label="lab_bokf_WeightedAverageInterestRateofLoansServicedforOthers_491180B2E9A0352F5EFED47EA711AD21" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted average interest rate</link:label>
    <link:label id="lab_bokf_WeightedAverageInterestRateofLoansServicedforOthers_491180B2E9A0352F5EFED47EA711AD21_label_en-US" xlink:label="lab_bokf_WeightedAverageInterestRateofLoansServicedforOthers_491180B2E9A0352F5EFED47EA711AD21" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Weighted Average Interest Rate of Loans Serviced for Others</link:label>
    <link:label id="lab_bokf_WeightedAverageInterestRateofLoansServicedforOthers_491180B2E9A0352F5EFED47EA711AD21_documentation_en-US" xlink:label="lab_bokf_WeightedAverageInterestRateofLoansServicedforOthers_491180B2E9A0352F5EFED47EA711AD21" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the weighted average interest rate of loans servicedf for others as of the balance sheet date.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_WeightedAverageInterestRateofLoansServicedforOthers" xlink:label="loc_bokf_WeightedAverageInterestRateofLoansServicedforOthers_491180B2E9A0352F5EFED47EA711AD21" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_WeightedAverageInterestRateofLoansServicedforOthers_491180B2E9A0352F5EFED47EA711AD21" xlink:to="lab_bokf_WeightedAverageInterestRateofLoansServicedforOthers_491180B2E9A0352F5EFED47EA711AD21" xlink:type="arc" />
    <link:label id="lab_bokf_ResidentialMortgageLoansServicedWeightedAverageRemainingTerm_67B2286B4D5FFA4920DAD47EA711789E_terseLabel_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansServicedWeightedAverageRemainingTerm_67B2286B4D5FFA4920DAD47EA711789E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining term (in months)</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansServicedWeightedAverageRemainingTerm_67B2286B4D5FFA4920DAD47EA711789E_label_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansServicedWeightedAverageRemainingTerm_67B2286B4D5FFA4920DAD47EA711789E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Mortgage Loans Serviced Weighted Average Remaining Term</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansServicedWeightedAverageRemainingTerm_67B2286B4D5FFA4920DAD47EA711789E_documentation_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansServicedWeightedAverageRemainingTerm_67B2286B4D5FFA4920DAD47EA711789E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the weighted average remaining term of mortgage loans being serviced fro others.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ResidentialMortgageLoansServicedWeightedAverageRemainingTerm" xlink:label="loc_bokf_ResidentialMortgageLoansServicedWeightedAverageRemainingTerm_67B2286B4D5FFA4920DAD47EA711789E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ResidentialMortgageLoansServicedWeightedAverageRemainingTerm_67B2286B4D5FFA4920DAD47EA711789E" xlink:to="lab_bokf_ResidentialMortgageLoansServicedWeightedAverageRemainingTerm_67B2286B4D5FFA4920DAD47EA711789E" xlink:type="arc" />
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmountRollForward_415DB9507F1DE2D688B4D47EA71194B5_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmountRollForward_415DB9507F1DE2D688B4D47EA71194B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Amount [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmountRollForward_415DB9507F1DE2D688B4D47EA71194B5_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmountRollForward_415DB9507F1DE2D688B4D47EA71194B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Amount [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ServicingAssetAtFairValueAmountRollForward" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmountRollForward_415DB9507F1DE2D688B4D47EA71194B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueAmountRollForward_415DB9507F1DE2D688B4D47EA71194B5" xlink:to="lab_us-gaap_ServicingAssetAtFairValueAmountRollForward_415DB9507F1DE2D688B4D47EA71194B5" xlink:type="arc" />
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmount_885994D97A07C37B4DE7D47EA711B353_periodStartLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmount_885994D97A07C37B4DE7D47EA711B353" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ServicingAssetAtFairValueAmount" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_885994D97A07C37B4DE7D47EA711B353" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueAmount_885994D97A07C37B4DE7D47EA711B353" xlink:to="lab_us-gaap_ServicingAssetAtFairValueAmount_885994D97A07C37B4DE7D47EA711B353" xlink:type="arc" />
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAdditions_70FC3366FCC0EBB3F170D47EA711082E_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAdditions_70FC3366FCC0EBB3F170D47EA711082E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additions, net</link:label>
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAdditions_70FC3366FCC0EBB3F170D47EA711082E_label_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAdditions_70FC3366FCC0EBB3F170D47EA711082E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Asset at Fair Value, Additions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ServicingAssetAtFairValueAdditions" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAdditions_70FC3366FCC0EBB3F170D47EA711082E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueAdditions_70FC3366FCC0EBB3F170D47EA711082E" xlink:to="lab_us-gaap_ServicingAssetAtFairValueAdditions_70FC3366FCC0EBB3F170D47EA711082E" xlink:type="arc" />
    <link:label id="lab_bokf_ChangeInFairValueDueToLoanRunoff_F8F9244F27D3E6B7DE6AD47EA711DA91_terseLabel_en-US" xlink:label="lab_bokf_ChangeInFairValueDueToLoanRunoff_F8F9244F27D3E6B7DE6AD47EA711DA91" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value due to principal payments</link:label>
    <link:label id="lab_bokf_ChangeInFairValueDueToLoanRunoff_F8F9244F27D3E6B7DE6AD47EA711DA91_label_en-US" xlink:label="lab_bokf_ChangeInFairValueDueToLoanRunoff_F8F9244F27D3E6B7DE6AD47EA711DA91" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in fair value due to loan runoff</link:label>
    <link:label id="lab_bokf_ChangeInFairValueDueToLoanRunoff_F8F9244F27D3E6B7DE6AD47EA711DA91_documentation_en-US" xlink:label="lab_bokf_ChangeInFairValueDueToLoanRunoff_F8F9244F27D3E6B7DE6AD47EA711DA91" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The decrease in fair value as a result of loan runoff.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ChangeInFairValueDueToLoanRunoff" xlink:label="loc_bokf_ChangeInFairValueDueToLoanRunoff_F8F9244F27D3E6B7DE6AD47EA711DA91" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ChangeInFairValueDueToLoanRunoff_F8F9244F27D3E6B7DE6AD47EA711DA91" xlink:to="lab_bokf_ChangeInFairValueDueToLoanRunoff_F8F9244F27D3E6B7DE6AD47EA711DA91" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions_7189CCEC333D0082CB95D47EA711BB52_terseLabel_en-US" xlink:label="lab_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions_7189CCEC333D0082CB95D47EA711BB52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in fair value due to market assumption changes</link:label>
    <link:label id="lab_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions_7189CCEC333D0082CB95D47EA711BB52_label_en-US" xlink:label="lab_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions_7189CCEC333D0082CB95D47EA711BB52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset at Fair Value, Changes in Fair Value Resulting from Changes in Assumptions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions" xlink:label="loc_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions_7189CCEC333D0082CB95D47EA711BB52" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions_7189CCEC333D0082CB95D47EA711BB52" xlink:to="lab_us-gaap_AssetAtFairValueChangesInFairValueResultingFromChangesInAssumptions_7189CCEC333D0082CB95D47EA711BB52" xlink:type="arc" />
    <link:label id="lab_us-gaap_ServicingAssetAtFairValueAmount_BA053607E9C70DC2EC5FD47EA711100B_periodEndLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetAtFairValueAmount_BA053607E9C70DC2EC5FD47EA711100B" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ServicingAssetAtFairValueAmount" xlink:label="loc_us-gaap_ServicingAssetAtFairValueAmount_BA053607E9C70DC2EC5FD47EA711100B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetAtFairValueAmount_BA053607E9C70DC2EC5FD47EA711100B" xlink:to="lab_us-gaap_ServicingAssetAtFairValueAmount_BA053607E9C70DC2EC5FD47EA711100B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_C359AEF653D6A8905194D47EA711F249_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_C359AEF653D6A8905194D47EA711F249" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing Assets at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]</link:label>
    <link:label id="lab_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_C359AEF653D6A8905194D47EA711F249_label_en-US" xlink:label="lab_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_C359AEF653D6A8905194D47EA711F249" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract" xlink:label="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_C359AEF653D6A8905194D47EA711F249" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_C359AEF653D6A8905194D47EA711F249" xlink:to="lab_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAbstract_C359AEF653D6A8905194D47EA711F249" xlink:type="arc" />
    <link:label id="lab_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_5373151F307B441AA776D47EA7111D3D_terseLabel_en-US" xlink:label="lab_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_5373151F307B441AA776D47EA7111D3D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Discount rate - risk-free rate plus a market premium (in hundredths)</link:label>
    <link:label id="lab_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_5373151F307B441AA776D47EA7111D3D_label_en-US" xlink:label="lab_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_5373151F307B441AA776D47EA7111D3D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate" xlink:label="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_5373151F307B441AA776D47EA7111D3D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_5373151F307B441AA776D47EA7111D3D" xlink:to="lab_us-gaap_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate_5373151F307B441AA776D47EA7111D3D" xlink:type="arc" />
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMinimum_F73DB717488732856872D47EA71119F8_terseLabel_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMinimum_F73DB717488732856872D47EA71119F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepayment rate - based upon loan interest rate, original term and loan type, minimum</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMinimum_F73DB717488732856872D47EA71119F8_label_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMinimum_F73DB717488732856872D47EA71119F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets At Fair Value Assumptions Used To Estimate Fair Value Prepayment Speed Minimum</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMinimum_F73DB717488732856872D47EA71119F8_documentation_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMinimum_F73DB717488732856872D47EA71119F8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The minimum estimated speed of prepayments of principal on financial assets which may be one of the factors applied in estimating the fair value of servicing assets.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMinimum" xlink:label="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMinimum_F73DB717488732856872D47EA71119F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMinimum_F73DB717488732856872D47EA71119F8" xlink:to="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMinimum_F73DB717488732856872D47EA71119F8" xlink:type="arc" />
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMaximum_225B48861B151E35B281D47EA71195CA_terseLabel_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMaximum_225B48861B151E35B281D47EA71195CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepayment rate - based upon loan interest rate, original term and loan type, maximum</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMaximum_225B48861B151E35B281D47EA71195CA_label_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMaximum_225B48861B151E35B281D47EA71195CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets At Fair Value Assumptions Used To Estimate Fair Value Prepayment Speed Maximum</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMaximum_225B48861B151E35B281D47EA71195CA_documentation_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMaximum_225B48861B151E35B281D47EA71195CA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The maximum estimated speed of prepayments of principal on financial assets which may be one of the factors applied in estimating the fair value of servicing assets.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMaximum" xlink:label="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMaximum_225B48861B151E35B281D47EA71195CA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMaximum_225B48861B151E35B281D47EA71195CA" xlink:to="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePrepaymentSpeedMaximum_225B48861B151E35B281D47EA71195CA" xlink:type="arc" />
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMinimum_060B59C48BE7BDA7606FD47EA7115895_verboseLabel_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMinimum_060B59C48BE7BDA7606FD47EA7115895" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Loan servicing costs - annually per loan based upon loan type, performing, minimum (in dollars per loan)</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMinimum_060B59C48BE7BDA7606FD47EA7115895_label_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMinimum_060B59C48BE7BDA7606FD47EA7115895" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets At Fair Value Assumptions Used To Estimate Fair Value Performing Loan Service Cost Minimum</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMinimum_060B59C48BE7BDA7606FD47EA7115895_documentation_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMinimum_060B59C48BE7BDA7606FD47EA7115895" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The minimum cost to service a performing loan for the period used as a variable in estimating fair value.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMinimum" xlink:label="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMinimum_060B59C48BE7BDA7606FD47EA7115895" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMinimum_060B59C48BE7BDA7606FD47EA7115895" xlink:to="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMinimum_060B59C48BE7BDA7606FD47EA7115895" xlink:type="arc" />
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMaximum_3CBB82CE002AE7542978D47EA711A831_verboseLabel_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMaximum_3CBB82CE002AE7542978D47EA711A831" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Loan servicing costs - annually per loan based upon loan type, performing, maximum (in dollars per loan)</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMaximum_3CBB82CE002AE7542978D47EA711A831_label_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMaximum_3CBB82CE002AE7542978D47EA711A831" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets At Fair Value Assumptions Used To Estimate Fair Value Performing Loan Service Cost Maximum</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMaximum_3CBB82CE002AE7542978D47EA711A831_documentation_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMaximum_3CBB82CE002AE7542978D47EA711A831" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The maximum cost to service a performing loan for the period used as a variable in estimating fair value.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMaximum" xlink:label="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMaximum_3CBB82CE002AE7542978D47EA711A831" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMaximum_3CBB82CE002AE7542978D47EA711A831" xlink:to="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValuePerformingLoanServiceCostMaximum_3CBB82CE002AE7542978D47EA711A831" xlink:type="arc" />
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanServiceCostMinimum_BBB0E4714C21F11A473DD47EA7113880_terseLabel_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanServiceCostMinimum_BBB0E4714C21F11A473DD47EA7113880" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan servicing costs - annually per loan based upon loan type, delinquent, minimum (in dollars per loan)</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanServiceCostMinimum_BBB0E4714C21F11A473DD47EA7113880_label_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanServiceCostMinimum_BBB0E4714C21F11A473DD47EA7113880" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets at Fair Value Assumptions Used to Estimate Fair Value Delinquent Loan Service Cost Minimum</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanServiceCostMinimum_BBB0E4714C21F11A473DD47EA7113880_documentation_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanServiceCostMinimum_BBB0E4714C21F11A473DD47EA7113880" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Assets at Fair Value Assumptions Used to Estimate Fair Value Delinquent Loan Service Cost Minimum</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanServiceCostMinimum" xlink:label="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanServiceCostMinimum_BBB0E4714C21F11A473DD47EA7113880" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanServiceCostMinimum_BBB0E4714C21F11A473DD47EA7113880" xlink:to="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanServiceCostMinimum_BBB0E4714C21F11A473DD47EA7113880" xlink:type="arc" />
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanSvcCostMaximum_35F09DE20B991A0D84CED47EA711EE9D_terseLabel_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanSvcCostMaximum_35F09DE20B991A0D84CED47EA711EE9D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan servicing costs - annually per loan based upon loan type, delinquent, maximum (in dollars per loan)</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanSvcCostMaximum_35F09DE20B991A0D84CED47EA711EE9D_label_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanSvcCostMaximum_35F09DE20B991A0D84CED47EA711EE9D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets At Fair Value Assumptions Used to Estimate Fair Value Delinquent Loan Svc Cost Maximum</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanSvcCostMaximum_35F09DE20B991A0D84CED47EA711EE9D_documentation_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanSvcCostMaximum_35F09DE20B991A0D84CED47EA711EE9D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Assets At Fair Value Assumptions Used to Estimate Fair Value Delinquent</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanSvcCostMaximum" xlink:label="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanSvcCostMaximum_35F09DE20B991A0D84CED47EA711EE9D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanSvcCostMaximum_35F09DE20B991A0D84CED47EA711EE9D" xlink:to="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueDelinquentLoanSvcCostMaximum_35F09DE20B991A0D84CED47EA711EE9D" xlink:type="arc" />
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMinimum_8CF4CDA07ADEA93E9AF6D47EA71168A6_terseLabel_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMinimum_8CF4CDA07ADEA93E9AF6D47EA71168A6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan servicing costs - annually per loan based upon loan type, foreclosure, minimum (in dollars per loan)</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMinimum_8CF4CDA07ADEA93E9AF6D47EA71168A6_label_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMinimum_8CF4CDA07ADEA93E9AF6D47EA71168A6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets at Fair Value Assumptions Used to Estimate Fair Value Foreclosure Loan Service Cost Minimum</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMinimum_8CF4CDA07ADEA93E9AF6D47EA71168A6_documentation_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMinimum_8CF4CDA07ADEA93E9AF6D47EA71168A6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Assets at Fair Value Assumptions Used to Estimate Fair Value Foreclosure Loan Service Cost Minimum</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMinimum" xlink:label="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMinimum_8CF4CDA07ADEA93E9AF6D47EA71168A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMinimum_8CF4CDA07ADEA93E9AF6D47EA71168A6" xlink:to="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMinimum_8CF4CDA07ADEA93E9AF6D47EA71168A6" xlink:type="arc" />
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMaximum_63D436FBF8FF3696AE3BD47EA711A1F1_terseLabel_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMaximum_63D436FBF8FF3696AE3BD47EA711A1F1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loan servicing costs - annually per loan based upon loan type, foreclosure, maximum (in dollars per loan)</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMaximum_63D436FBF8FF3696AE3BD47EA711A1F1_label_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMaximum_63D436FBF8FF3696AE3BD47EA711A1F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets At Fair Value Assumptions Used to Estimate Fair Value Foreclosure Loan Service Cost Maximum</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMaximum_63D436FBF8FF3696AE3BD47EA711A1F1_documentation_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMaximum_63D436FBF8FF3696AE3BD47EA711A1F1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing Assets At Fair Value Assumptions Used to Estimate Fair Value Foreclosure Loan Service Cost Maximum</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMaximum" xlink:label="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMaximum_63D436FBF8FF3696AE3BD47EA711A1F1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMaximum_63D436FBF8FF3696AE3BD47EA711A1F1" xlink:to="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueForeclosureLoanServiceCostMaximum_63D436FBF8FF3696AE3BD47EA711A1F1" xlink:type="arc" />
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueEscrowEarningsRate_1B9F00C15E4F5644559ED47EA7112057_verboseLabel_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueEscrowEarningsRate_1B9F00C15E4F5644559ED47EA7112057" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Escrow earnings rate - indexed to rates paid on deposit accounts with comparable average life (in hundredths)</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueEscrowEarningsRate_1B9F00C15E4F5644559ED47EA7112057_label_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueEscrowEarningsRate_1B9F00C15E4F5644559ED47EA7112057" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Servicing Assets At Fair Value Assumptions Used To Estimate Fair Value Escrow Earnings Rate</link:label>
    <link:label id="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueEscrowEarningsRate_1B9F00C15E4F5644559ED47EA7112057_documentation_en-US" xlink:label="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueEscrowEarningsRate_1B9F00C15E4F5644559ED47EA7112057" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The escrow earning rate used to estimate the fair value of servicing assets, based on rates paid on deposit accounts.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueEscrowEarningsRate" xlink:label="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueEscrowEarningsRate_1B9F00C15E4F5644559ED47EA7112057" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueEscrowEarningsRate_1B9F00C15E4F5644559ED47EA7112057" xlink:to="lab_bokf_ServicingAssetsAtFairValueAssumptionsUsedToEstimateFairValueEscrowEarningsRate_1B9F00C15E4F5644559ED47EA7112057" xlink:type="arc" />
    <link:label id="lab_bokf_Primarysecondarymortgageratespread_92D09C5A142A637B7FBCD47EA711B97E_terseLabel_en-US" xlink:label="lab_bokf_Primarysecondarymortgageratespread_92D09C5A142A637B7FBCD47EA711B97E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Primary secondary mortgage rate spread (in basis points)</link:label>
    <link:label id="lab_bokf_Primarysecondarymortgageratespread_92D09C5A142A637B7FBCD47EA711B97E_label_en-US" xlink:label="lab_bokf_Primarysecondarymortgageratespread_92D09C5A142A637B7FBCD47EA711B97E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Primary secondary mortgage rate spread</link:label>
    <link:label id="lab_bokf_Primarysecondarymortgageratespread_92D09C5A142A637B7FBCD47EA711B97E_documentation_en-US" xlink:label="lab_bokf_Primarysecondarymortgageratespread_92D09C5A142A637B7FBCD47EA711B97E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mortgage rate spread between the primary and secondary market.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Primarysecondarymortgageratespread" xlink:label="loc_bokf_Primarysecondarymortgageratespread_92D09C5A142A637B7FBCD47EA711B97E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Primarysecondarymortgageratespread_92D09C5A142A637B7FBCD47EA711B97E" xlink:to="lab_bokf_Primarysecondarymortgageratespread_92D09C5A142A637B7FBCD47EA711B97E" xlink:type="arc" />
    <link:label id="lab_bokf_MortgageBankingRevenueAbstract_C709946DD8415905CFB5B130861E2BAB_label_en-US" xlink:label="lab_bokf_MortgageBankingRevenueAbstract_C709946DD8415905CFB5B130861E2BAB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Banking Revenue [Abstract]</link:label>
    <link:label id="lab_bokf_MortgageBankingRevenueAbstract_C709946DD8415905CFB5B130861E2BAB_documentation_en-US" xlink:label="lab_bokf_MortgageBankingRevenueAbstract_C709946DD8415905CFB5B130861E2BAB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Mortgage Banking Revenue [Abstract]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MortgageBankingRevenueAbstract" xlink:label="loc_bokf_MortgageBankingRevenueAbstract_C709946DD8415905CFB5B130861E2BAB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MortgageBankingRevenueAbstract_C709946DD8415905CFB5B130861E2BAB" xlink:to="lab_bokf_MortgageBankingRevenueAbstract_C709946DD8415905CFB5B130861E2BAB" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossOnSaleOfMortgageLoans_1F70C1373ED097B92705B130861E35E6_terseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfMortgageLoans_1F70C1373ED097B92705B130861E35E6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net realized gains on sale of mortgage loans</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfMortgageLoans_1F70C1373ED097B92705B130861E35E6_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfMortgageLoans_1F70C1373ED097B92705B130861E35E6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Sale of Mortgage Loans</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossOnSaleOfMortgageLoans" xlink:label="loc_us-gaap_GainLossOnSaleOfMortgageLoans_1F70C1373ED097B92705B130861E35E6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfMortgageLoans_1F70C1373ED097B92705B130861E35E6" xlink:to="lab_us-gaap_GainLossOnSaleOfMortgageLoans_1F70C1373ED097B92705B130861E35E6" xlink:type="arc" />
    <link:label id="lab_bokf_Netchangeinunrealizedgainonmortgageloansheldforsale_70B1C1069C8DD246A22DB130861E887E_terseLabel_en-US" xlink:label="lab_bokf_Netchangeinunrealizedgainonmortgageloansheldforsale_70B1C1069C8DD246A22DB130861E887E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in unrealized gain on mortgage loans held for sale</link:label>
    <link:label id="lab_bokf_Netchangeinunrealizedgainonmortgageloansheldforsale_70B1C1069C8DD246A22DB130861E887E_label_en-US" xlink:label="lab_bokf_Netchangeinunrealizedgainonmortgageloansheldforsale_70B1C1069C8DD246A22DB130861E887E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net change in unrealized gain on mortgage loans held for sale</link:label>
    <link:label id="lab_bokf_Netchangeinunrealizedgainonmortgageloansheldforsale_70B1C1069C8DD246A22DB130861E887E_documentation_en-US" xlink:label="lab_bokf_Netchangeinunrealizedgainonmortgageloansheldforsale_70B1C1069C8DD246A22DB130861E887E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the net change in unrealized gain on mortgage loans held for sale under fair value option.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Netchangeinunrealizedgainonmortgageloansheldforsale" xlink:label="loc_bokf_Netchangeinunrealizedgainonmortgageloansheldforsale_70B1C1069C8DD246A22DB130861E887E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Netchangeinunrealizedgainonmortgageloansheldforsale_70B1C1069C8DD246A22DB130861E887E" xlink:to="lab_bokf_Netchangeinunrealizedgainonmortgageloansheldforsale_70B1C1069C8DD246A22DB130861E887E" xlink:type="arc" />
    <link:label id="lab_bokf_Changeinfairvalueofmortgageloancommitments_92813088C9C697105BB3B130861E4725_terseLabel_en-US" xlink:label="lab_bokf_Changeinfairvalueofmortgageloancommitments_92813088C9C697105BB3B130861E4725" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in the fair value of mortgage loan commitments</link:label>
    <link:label id="lab_bokf_Changeinfairvalueofmortgageloancommitments_92813088C9C697105BB3B130861E4725_label_en-US" xlink:label="lab_bokf_Changeinfairvalueofmortgageloancommitments_92813088C9C697105BB3B130861E4725" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in fair value of mortgage loan commitments</link:label>
    <link:label id="lab_bokf_Changeinfairvalueofmortgageloancommitments_92813088C9C697105BB3B130861E4725_documentation_en-US" xlink:label="lab_bokf_Changeinfairvalueofmortgageloancommitments_92813088C9C697105BB3B130861E4725" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the change in fair value of mortgage loan commitments during the period.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Changeinfairvalueofmortgageloancommitments" xlink:label="loc_bokf_Changeinfairvalueofmortgageloancommitments_92813088C9C697105BB3B130861E4725" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Changeinfairvalueofmortgageloancommitments_92813088C9C697105BB3B130861E4725" xlink:to="lab_bokf_Changeinfairvalueofmortgageloancommitments_92813088C9C697105BB3B130861E4725" xlink:type="arc" />
    <link:label id="lab_bokf_Changeinthefairvalueofforwardsalescommitments_A25983A627046DF1BACFB130861E739C_terseLabel_en-US" xlink:label="lab_bokf_Changeinthefairvalueofforwardsalescommitments_A25983A627046DF1BACFB130861E739C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net change in the fair value of forward sales contracts</link:label>
    <link:label id="lab_bokf_Changeinthefairvalueofforwardsalescommitments_A25983A627046DF1BACFB130861E739C_label_en-US" xlink:label="lab_bokf_Changeinthefairvalueofforwardsalescommitments_A25983A627046DF1BACFB130861E739C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Change in the fair value of forward sales commitments</link:label>
    <link:label id="lab_bokf_Changeinthefairvalueofforwardsalescommitments_A25983A627046DF1BACFB130861E739C_documentation_en-US" xlink:label="lab_bokf_Changeinthefairvalueofforwardsalescommitments_A25983A627046DF1BACFB130861E739C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the change in the fair value of forward sales commitments considered to be derivative instruments during the period.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Changeinthefairvalueofforwardsalescommitments" xlink:label="loc_bokf_Changeinthefairvalueofforwardsalescommitments_A25983A627046DF1BACFB130861E739C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Changeinthefairvalueofforwardsalescommitments_A25983A627046DF1BACFB130861E739C" xlink:to="lab_bokf_Changeinthefairvalueofforwardsalescommitments_A25983A627046DF1BACFB130861E739C" xlink:type="arc" />
    <link:label id="lab_bokf_MortgageProductionRevenue_7ED40468E14A3BFACA46B130861F00B8_totalLabel_en-US" xlink:label="lab_bokf_MortgageProductionRevenue_7ED40468E14A3BFACA46B130861F00B8" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total production revenue</link:label>
    <link:label id="lab_bokf_MortgageProductionRevenue_7ED40468E14A3BFACA46B130861F00B8_label_en-US" xlink:label="lab_bokf_MortgageProductionRevenue_7ED40468E14A3BFACA46B130861F00B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Production Revenue</link:label>
    <link:label id="lab_bokf_MortgageProductionRevenue_7ED40468E14A3BFACA46B130861F00B8_documentation_en-US" xlink:label="lab_bokf_MortgageProductionRevenue_7ED40468E14A3BFACA46B130861F00B8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Total gain (loss) on mortgage loans held for sale, including mortgage loan commitments and forward sales contracts.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MortgageProductionRevenue" xlink:label="loc_bokf_MortgageProductionRevenue_7ED40468E14A3BFACA46B130861F00B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MortgageProductionRevenue_7ED40468E14A3BFACA46B130861F00B8" xlink:to="lab_bokf_MortgageProductionRevenue_7ED40468E14A3BFACA46B130861F00B8" xlink:type="arc" />
    <link:label id="lab_bokf_MortgageServicingFees_BFBBED4B1AEA51BB85CFB1396352673B_terseLabel_en-US" xlink:label="lab_bokf_MortgageServicingFees_BFBBED4B1AEA51BB85CFB1396352673B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Servicing revenue</link:label>
    <link:label id="lab_bokf_MortgageServicingFees_BFBBED4B1AEA51BB85CFB1396352673B_label_en-US" xlink:label="lab_bokf_MortgageServicingFees_BFBBED4B1AEA51BB85CFB1396352673B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage Servicing Fees</link:label>
    <link:label id="lab_bokf_MortgageServicingFees_BFBBED4B1AEA51BB85CFB1396352673B_documentation_en-US" xlink:label="lab_bokf_MortgageServicingFees_BFBBED4B1AEA51BB85CFB1396352673B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Servicing fees for loans secured by real property.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MortgageServicingFees" xlink:label="loc_bokf_MortgageServicingFees_BFBBED4B1AEA51BB85CFB1396352673B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MortgageServicingFees_BFBBED4B1AEA51BB85CFB1396352673B" xlink:to="lab_bokf_MortgageServicingFees_BFBBED4B1AEA51BB85CFB1396352673B" xlink:type="arc" />
    <link:label id="lab_bokf_MortgageBankingRevenue_F4D7A29132E53D639EC0B130861F7414_totalLabel_en-US" xlink:label="lab_bokf_MortgageBankingRevenue_F4D7A29132E53D639EC0B130861F7414" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total mortgage banking revenue</link:label>
    <link:label id="lab_bokf_MortgageBankingRevenue_F4D7A29132E53D639EC0B130861F7414_label_en-US" xlink:label="lab_bokf_MortgageBankingRevenue_F4D7A29132E53D639EC0B130861F7414" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgage banking revenue</link:label>
    <link:label id="lab_bokf_MortgageBankingRevenue_F4D7A29132E53D639EC0B130861F7414_documentation_en-US" xlink:label="lab_bokf_MortgageBankingRevenue_F4D7A29132E53D639EC0B130861F7414" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Noninterest income derived from the sale and changes in fair value of residential mortgage loans held for sale and fees for servicing of residential mortgage loans held by third parties. Also includes changes in the fair value of residential mortgage loan commitments and forward sales commitments considered to be derivative instruments.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MortgageBankingRevenue" xlink:label="loc_bokf_MortgageBankingRevenue_F4D7A29132E53D639EC0B130861F7414" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MortgageBankingRevenue_F4D7A29132E53D639EC0B130861F7414" xlink:to="lab_bokf_MortgageBankingRevenue_F4D7A29132E53D639EC0B130861F7414" xlink:type="arc" />
    <link:label id="lab_us-gaap_AvailableForSaleSecuritiesAbstract_FCBAD112E37392306107D47EA836959B_verboseLabel_en-US" xlink:label="lab_us-gaap_AvailableForSaleSecuritiesAbstract_FCBAD112E37392306107D47EA836959B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investment securities [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_FCBAD112E37392306107D47EA836959B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_FCBAD112E37392306107D47EA836959B" xlink:to="lab_us-gaap_AvailableForSaleSecuritiesAbstract_FCBAD112E37392306107D47EA836959B" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealEstateOwnedValuationAllowance_23C8DB6EBC36C2E6930CD47EA836363E_terseLabel_en-US" xlink:label="lab_us-gaap_RealEstateOwnedValuationAllowance_23C8DB6EBC36C2E6930CD47EA836363E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for real estate and other repossessed assets</link:label>
    <link:label id="lab_us-gaap_RealEstateOwnedValuationAllowance_23C8DB6EBC36C2E6930CD47EA836363E_label_en-US" xlink:label="lab_us-gaap_RealEstateOwnedValuationAllowance_23C8DB6EBC36C2E6930CD47EA836363E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Owned, Valuation Allowance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RealEstateOwnedValuationAllowance" xlink:label="loc_us-gaap_RealEstateOwnedValuationAllowance_23C8DB6EBC36C2E6930CD47EA836363E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateOwnedValuationAllowance_23C8DB6EBC36C2E6930CD47EA836363E" xlink:to="lab_us-gaap_RealEstateOwnedValuationAllowance_23C8DB6EBC36C2E6930CD47EA836363E" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_79C6082964394C3DCFEDD47EA836D069_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare_79C6082964394C3DCFEDD47EA836D069" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, par value (in dollars per share)</link:label>
    <link:label id="lab_us-gaap_CommonStockParOrStatedValuePerShare_79C6082964394C3DCFEDD47EA836D069_label_en-US" xlink:label="lab_us-gaap_CommonStockParOrStatedValuePerShare_79C6082964394C3DCFEDD47EA836D069" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Par or Stated Value Per Share</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_79C6082964394C3DCFEDD47EA836D069" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockParOrStatedValuePerShare_79C6082964394C3DCFEDD47EA836D069" xlink:to="lab_us-gaap_CommonStockParOrStatedValuePerShare_79C6082964394C3DCFEDD47EA836D069" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_440D00B0054A2A9DDB11D47EA8360B4C_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized_440D00B0054A2A9DDB11D47EA8360B4C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares authorized (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_440D00B0054A2A9DDB11D47EA8360B4C_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized_440D00B0054A2A9DDB11D47EA8360B4C" 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_440D00B0054A2A9DDB11D47EA8360B4C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesAuthorized_440D00B0054A2A9DDB11D47EA8360B4C" xlink:to="lab_us-gaap_CommonStockSharesAuthorized_440D00B0054A2A9DDB11D47EA8360B4C" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockSharesIssued_18A0D0A55C2B4056735AD47EA83666D0_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued_18A0D0A55C2B4056735AD47EA83666D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares issued (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesIssued_18A0D0A55C2B4056735AD47EA83666D0_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued_18A0D0A55C2B4056735AD47EA83666D0" 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_18A0D0A55C2B4056735AD47EA83666D0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesIssued_18A0D0A55C2B4056735AD47EA83666D0" xlink:to="lab_us-gaap_CommonStockSharesIssued_18A0D0A55C2B4056735AD47EA83666D0" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_E5401DDCA9B3E0AE18E0D47EA8360825_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding_E5401DDCA9B3E0AE18E0D47EA8360825" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, shares outstanding (in shares)</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesOutstanding_E5401DDCA9B3E0AE18E0D47EA8360825_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesOutstanding_E5401DDCA9B3E0AE18E0D47EA8360825" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares, Outstanding</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_E5401DDCA9B3E0AE18E0D47EA8360825" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockSharesOutstanding_E5401DDCA9B3E0AE18E0D47EA8360825" xlink:to="lab_us-gaap_CommonStockSharesOutstanding_E5401DDCA9B3E0AE18E0D47EA8360825" xlink:type="arc" />
    <link:label id="lab_us-gaap_TreasuryStockShares_C89C22ADE2653FA2C383D47EA836C241_terseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockShares_C89C22ADE2653FA2C383D47EA836C241" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Treasury stock, shares at cost (in shares)</link:label>
    <link:label id="lab_us-gaap_TreasuryStockShares_C89C22ADE2653FA2C383D47EA836C241_label_en-US" xlink:label="lab_us-gaap_TreasuryStockShares_C89C22ADE2653FA2C383D47EA836C241" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock, Shares</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockShares" xlink:label="loc_us-gaap_TreasuryStockShares_C89C22ADE2653FA2C383D47EA836C241" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockShares_C89C22ADE2653FA2C383D47EA836C241" xlink:to="lab_us-gaap_TreasuryStockShares_C89C22ADE2653FA2C383D47EA836C241" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfStockholdersEquityAbstract_C4F8DED9085378193D68BD0D9CFAC72A_label_en-US" xlink:label="lab_us-gaap_StatementOfStockholdersEquityAbstract_C4F8DED9085378193D68BD0D9CFAC72A" 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_C4F8DED9085378193D68BD0D9CFAC72A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract_C4F8DED9085378193D68BD0D9CFAC72A" xlink:to="lab_us-gaap_StatementOfStockholdersEquityAbstract_C4F8DED9085378193D68BD0D9CFAC72A" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockMember_76A0D9337A1C89FEC342BD0D9CFA1F98_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockMember_76A0D9337A1C89FEC342BD0D9CFA1F98" 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_76A0D9337A1C89FEC342BD0D9CFA1F98_label_en-US" xlink:label="lab_us-gaap_CommonStockMember_76A0D9337A1C89FEC342BD0D9CFA1F98" 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_76A0D9337A1C89FEC342BD0D9CFA1F98" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockMember_76A0D9337A1C89FEC342BD0D9CFA1F98" xlink:to="lab_us-gaap_CommonStockMember_76A0D9337A1C89FEC342BD0D9CFA1F98" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_C86AA1308F05EDB571A6BD0D9CFA6B81_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember_C86AA1308F05EDB571A6BD0D9CFA6B81" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital Surplus [Member]</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalMember_C86AA1308F05EDB571A6BD0D9CFA6B81_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalMember_C86AA1308F05EDB571A6BD0D9CFA6B81" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid-in Capital [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_C86AA1308F05EDB571A6BD0D9CFA6B81" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdditionalPaidInCapitalMember_C86AA1308F05EDB571A6BD0D9CFA6B81" xlink:to="lab_us-gaap_AdditionalPaidInCapitalMember_C86AA1308F05EDB571A6BD0D9CFA6B81" xlink:type="arc" />
    <link:label id="lab_us-gaap_RetainedEarningsMember_69126B76BB9762B67000BD0D9CFACEDF_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_69126B76BB9762B67000BD0D9CFACEDF" 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_69126B76BB9762B67000BD0D9CFACEDF_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsMember_69126B76BB9762B67000BD0D9CFACEDF" 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_69126B76BB9762B67000BD0D9CFACEDF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RetainedEarningsMember_69126B76BB9762B67000BD0D9CFACEDF" xlink:to="lab_us-gaap_RetainedEarningsMember_69126B76BB9762B67000BD0D9CFACEDF" xlink:type="arc" />
    <link:label id="lab_us-gaap_TreasuryStockMember_99D3BFEBBDCD29397920BD0D9CFABB7C_terseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockMember_99D3BFEBBDCD29397920BD0D9CFABB7C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Treasury Stock [Member]</link:label>
    <link:label id="lab_us-gaap_TreasuryStockMember_99D3BFEBBDCD29397920BD0D9CFABB7C_label_en-US" xlink:label="lab_us-gaap_TreasuryStockMember_99D3BFEBBDCD29397920BD0D9CFABB7C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_99D3BFEBBDCD29397920BD0D9CFABB7C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockMember_99D3BFEBBDCD29397920BD0D9CFABB7C" xlink:to="lab_us-gaap_TreasuryStockMember_99D3BFEBBDCD29397920BD0D9CFABB7C" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_052578EF5BF0BCDE78AEBD0D9CFA56C4_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_052578EF5BF0BCDE78AEBD0D9CFA56C4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss) [Member]</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_052578EF5BF0BCDE78AEBD0D9CFA56C4_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_052578EF5BF0BCDE78AEBD0D9CFA56C4" 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_052578EF5BF0BCDE78AEBD0D9CFA56C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_052578EF5BF0BCDE78AEBD0D9CFA56C4" xlink:to="lab_us-gaap_AccumulatedOtherComprehensiveIncomeMember_052578EF5BF0BCDE78AEBD0D9CFA56C4" xlink:type="arc" />
    <link:label id="lab_us-gaap_ParentMember_218857874B2A996B5C99BD0D9CFAF252_terseLabel_en-US" xlink:label="lab_us-gaap_ParentMember_218857874B2A996B5C99BD0D9CFAF252" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total Shareholders' Equity [Member]</link:label>
    <link:label id="lab_us-gaap_ParentMember_218857874B2A996B5C99BD0D9CFAF252_label_en-US" xlink:label="lab_us-gaap_ParentMember_218857874B2A996B5C99BD0D9CFAF252" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Parent [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ParentMember" xlink:label="loc_us-gaap_ParentMember_218857874B2A996B5C99BD0D9CFAF252" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ParentMember_218857874B2A996B5C99BD0D9CFAF252" xlink:to="lab_us-gaap_ParentMember_218857874B2A996B5C99BD0D9CFAF252" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharesIssued_01380E47B3ECD9E2F376BD0D9CFAC806_periodStartLabel_en-US" xlink:label="lab_us-gaap_SharesIssued_01380E47B3ECD9E2F376BD0D9CFAC806" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance, beginning of period (in shares)</link:label>
    <link:label id="lab_us-gaap_SharesIssued_01380E47B3ECD9E2F376BD0D9CFAC806_label_en-US" xlink:label="lab_us-gaap_SharesIssued_01380E47B3ECD9E2F376BD0D9CFAC806" 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_01380E47B3ECD9E2F376BD0D9CFAC806" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesIssued_01380E47B3ECD9E2F376BD0D9CFAC806" xlink:to="lab_us-gaap_SharesIssued_01380E47B3ECD9E2F376BD0D9CFAC806" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_272668768B77C8168141BD0D9CFA7181_periodStartLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_272668768B77C8168141BD0D9CFA7181" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance, 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_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_272668768B77C8168141BD0D9CFA7181" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_272668768B77C8168141BD0D9CFA7181" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_272668768B77C8168141BD0D9CFA7181" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1_BD7160AAB26A7717B8C7BD0D9CFA46BA_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1_BD7160AAB26A7717B8C7BD0D9CFA46BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Balance, beginning of period, adjusted</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1_BD7160AAB26A7717B8C7BD0D9CFA46BA_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1_BD7160AAB26A7717B8C7BD0D9CFA46BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1_BD7160AAB26A7717B8C7BD0D9CFA46BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1_BD7160AAB26A7717B8C7BD0D9CFA46BA" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1_BD7160AAB26A7717B8C7BD0D9CFA46BA" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProfitLoss_55FED08ADE90F7E3BF8FBD0D9CFA9DF4_verboseLabel_en-US" xlink:label="lab_us-gaap_ProfitLoss_55FED08ADE90F7E3BF8FBD0D9CFA9DF4" 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_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_55FED08ADE90F7E3BF8FBD0D9CFA9DF4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProfitLoss_55FED08ADE90F7E3BF8FBD0D9CFA9DF4" xlink:to="lab_us-gaap_ProfitLoss_55FED08ADE90F7E3BF8FBD0D9CFA9DF4" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DB2C1E53B953618C5849BD0D9CFA62D4_terseLabel_en-US" xlink:label="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DB2C1E53B953618C5849BD0D9CFA62D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" 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_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DB2C1E53B953618C5849BD0D9CFA62D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DB2C1E53B953618C5849BD0D9CFA62D4" xlink:to="lab_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DB2C1E53B953618C5849BD0D9CFA62D4" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockRepurchasedDuringPeriodShares_34ED472275A5231F2556BD0D9CFA4B2D_terseLabel_en-US" xlink:label="lab_us-gaap_StockRepurchasedDuringPeriodShares_34ED472275A5231F2556BD0D9CFA4B2D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Repurchase of common stock (in shares)</link:label>
    <link:label id="lab_us-gaap_StockRepurchasedDuringPeriodShares_34ED472275A5231F2556BD0D9CFA4B2D_label_en-US" xlink:label="lab_us-gaap_StockRepurchasedDuringPeriodShares_34ED472275A5231F2556BD0D9CFA4B2D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Repurchased 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_StockRepurchasedDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_34ED472275A5231F2556BD0D9CFA4B2D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockRepurchasedDuringPeriodShares_34ED472275A5231F2556BD0D9CFA4B2D" xlink:to="lab_us-gaap_StockRepurchasedDuringPeriodShares_34ED472275A5231F2556BD0D9CFA4B2D" xlink:type="arc" />
    <link:label id="lab_us-gaap_TreasuryStockValueAcquiredParValueMethod_AFC0ED670FF2F01A2610BD0D9CFAA165_negatedLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockValueAcquiredParValueMethod_AFC0ED670FF2F01A2610BD0D9CFAA165" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Repurchase of common stock</link:label>
    <link:label id="lab_us-gaap_TreasuryStockValueAcquiredParValueMethod_AFC0ED670FF2F01A2610BD0D9CFAA165_label_en-US" xlink:label="lab_us-gaap_TreasuryStockValueAcquiredParValueMethod_AFC0ED670FF2F01A2610BD0D9CFAA165" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock, Value, Acquired, Par Value Method</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockValueAcquiredParValueMethod" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredParValueMethod_AFC0ED670FF2F01A2610BD0D9CFAA165" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TreasuryStockValueAcquiredParValueMethod_AFC0ED670FF2F01A2610BD0D9CFAA165" xlink:to="lab_us-gaap_TreasuryStockValueAcquiredParValueMethod_AFC0ED670FF2F01A2610BD0D9CFAA165" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_4E34B3C8060A165D2BA3BD0D9CFACBE6_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_4E34B3C8060A165D2BA3BD0D9CFACBE6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock options exercised (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_4E34B3C8060A165D2BA3BD0D9CFACBE6_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_4E34B3C8060A165D2BA3BD0D9CFACBE6" 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_4E34B3C8060A165D2BA3BD0D9CFACBE6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_4E34B3C8060A165D2BA3BD0D9CFACBE6" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_4E34B3C8060A165D2BA3BD0D9CFACBE6" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense_C29F8D2C3141CEB422B9BD0D9CFA60A3_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense_C29F8D2C3141CEB422B9BD0D9CFA60A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock options exercised</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense_C29F8D2C3141CEB422B9BD0D9CFA60A3_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense_C29F8D2C3141CEB422B9BD0D9CFA60A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense_C29F8D2C3141CEB422B9BD0D9CFA60A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense_C29F8D2C3141CEB422B9BD0D9CFA60A3" xlink:to="lab_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercisedNetOfTaxBenefitExpense_C29F8D2C3141CEB422B9BD0D9CFA60A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_3B427B71AE443385159FBD0D9CFA0504_terseLabel_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_3B427B71AE443385159FBD0D9CFA0504" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-vested shares awarded, net (in shares)</link:label>
    <link:label id="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_3B427B71AE443385159FBD0D9CFA0504_label_en-US" xlink:label="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_3B427B71AE443385159FBD0D9CFA0504" 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_3B427B71AE443385159FBD0D9CFA0504" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_3B427B71AE443385159FBD0D9CFA0504" xlink:to="lab_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_3B427B71AE443385159FBD0D9CFA0504" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_78AE57CC9A14C7A3947BBD0D9CFAD632_terseLabel_en-US" xlink:label="lab_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_78AE57CC9A14C7A3947BBD0D9CFAD632" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Vesting of non-vested shares (in shares)</link:label>
    <link:label id="lab_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_78AE57CC9A14C7A3947BBD0D9CFAD632_label_en-US" xlink:label="lab_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_78AE57CC9A14C7A3947BBD0D9CFAD632" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Shares Paid for Tax Withholding for 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_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_78AE57CC9A14C7A3947BBD0D9CFAD632" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_78AE57CC9A14C7A3947BBD0D9CFAD632" xlink:to="lab_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_78AE57CC9A14C7A3947BBD0D9CFAD632" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_4B3E6CE674162BB50EE9BD0D9CFA4A32_negatedLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_4B3E6CE674162BB50EE9BD0D9CFA4A32" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Vesting of non-vested shares</link:label>
    <link:label id="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_4B3E6CE674162BB50EE9BD0D9CFA4A32_label_en-US" xlink:label="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_4B3E6CE674162BB50EE9BD0D9CFA4A32" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments Related to Tax Withholding for 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_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_4B3E6CE674162BB50EE9BD0D9CFA4A32" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_4B3E6CE674162BB50EE9BD0D9CFA4A32" xlink:to="lab_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_4B3E6CE674162BB50EE9BD0D9CFA4A32" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_C8EBAAE3E39DF7D9CB5ABD0D9CFA255B_terseLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_C8EBAAE3E39DF7D9CB5ABD0D9CFA255B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share-based compensation</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_C8EBAAE3E39DF7D9CB5ABD0D9CFA255B_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_C8EBAAE3E39DF7D9CB5ABD0D9CFA255B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_C8EBAAE3E39DF7D9CB5ABD0D9CFA255B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_C8EBAAE3E39DF7D9CB5ABD0D9CFA255B" xlink:to="lab_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_C8EBAAE3E39DF7D9CB5ABD0D9CFA255B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DividendsCommonStockCash_F200F5B27F237FEE2548BD0D9CFA9537_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DividendsCommonStockCash_F200F5B27F237FEE2548BD0D9CFA9537" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Cash dividends on common stock</link:label>
    <link:label id="lab_us-gaap_DividendsCommonStockCash_F200F5B27F237FEE2548BD0D9CFA9537_label_en-US" xlink:label="lab_us-gaap_DividendsCommonStockCash_F200F5B27F237FEE2548BD0D9CFA9537" 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_F200F5B27F237FEE2548BD0D9CFA9537" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsCommonStockCash_F200F5B27F237FEE2548BD0D9CFA9537" xlink:to="lab_us-gaap_DividendsCommonStockCash_F200F5B27F237FEE2548BD0D9CFA9537" xlink:type="arc" />
    <link:label id="lab_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_DD12FEE362072C0B5A4CBD0D9CFA10DE_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_DD12FEE362072C0B5A4CBD0D9CFA10DE" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Sale of non-controlling interests</link:label>
    <link:label id="lab_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_DD12FEE362072C0B5A4CBD0D9CFA10DE_label_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_DD12FEE362072C0B5A4CBD0D9CFA10DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest, Decrease from Deconsolidation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation" xlink:label="loc_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_DD12FEE362072C0B5A4CBD0D9CFA10DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_DD12FEE362072C0B5A4CBD0D9CFA10DE" xlink:to="lab_us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation_DD12FEE362072C0B5A4CBD0D9CFA10DE" xlink:type="arc" />
    <link:label id="lab_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D903F604762D2D7B369BBD0D9CFA4E03_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D903F604762D2D7B369BBD0D9CFA4E03" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Capital calls and distributions, net</link:label>
    <link:label id="lab_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D903F604762D2D7B369BBD0D9CFA4E03_label_en-US" xlink:label="lab_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D903F604762D2D7B369BBD0D9CFA4E03" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D903F604762D2D7B369BBD0D9CFA4E03" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D903F604762D2D7B369BBD0D9CFA4E03" xlink:to="lab_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_D903F604762D2D7B369BBD0D9CFA4E03" xlink:type="arc" />
    <link:label id="lab_us-gaap_SharesIssued_210F3E0B3D04B8E2E077BD0D9CFA41FC_periodEndLabel_en-US" xlink:label="lab_us-gaap_SharesIssued_210F3E0B3D04B8E2E077BD0D9CFA41FC" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance, end of period (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_210F3E0B3D04B8E2E077BD0D9CFA41FC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SharesIssued_210F3E0B3D04B8E2E077BD0D9CFA41FC" xlink:to="lab_us-gaap_SharesIssued_210F3E0B3D04B8E2E077BD0D9CFA41FC" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_C7533330776C3709FB04BD0D9CFADE80_periodEndLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_C7533330776C3709FB04BD0D9CFADE80" 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_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_C7533330776C3709FB04BD0D9CFADE80" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_C7533330776C3709FB04BD0D9CFADE80" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_C7533330776C3709FB04BD0D9CFADE80" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_DAC0B34A329FC282183AC5654BDF089C_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_DAC0B34A329FC282183AC5654BDF089C" 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_DAC0B34A329FC282183AC5654BDF089C_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_DAC0B34A329FC282183AC5654BDF089C" 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_DAC0B34A329FC282183AC5654BDF089C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_DAC0B34A329FC282183AC5654BDF089C" xlink:to="lab_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_DAC0B34A329FC282183AC5654BDF089C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_215B1E3AB42EBC263108C5654BE10E47_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_215B1E3AB42EBC263108C5654BE10E47" 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_215B1E3AB42EBC263108C5654BE10E47_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_215B1E3AB42EBC263108C5654BE10E47" 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_215B1E3AB42EBC263108C5654BE10E47" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_215B1E3AB42EBC263108C5654BE10E47" xlink:to="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_215B1E3AB42EBC263108C5654BE10E47" xlink:type="arc" />
    <link:label id="lab_bokf_ActivityInAllowanceForCreditLossesAbstract_C43F3297D6127B1034B4C5654BE10B14_verboseLabel_en-US" xlink:label="lab_bokf_ActivityInAllowanceForCreditLossesAbstract_C43F3297D6127B1034B4C5654BE10B14" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Activity in allowance for credit losses [Abstract]</link:label>
    <link:label id="lab_bokf_ActivityInAllowanceForCreditLossesAbstract_C43F3297D6127B1034B4C5654BE10B14_label_en-US" xlink:label="lab_bokf_ActivityInAllowanceForCreditLossesAbstract_C43F3297D6127B1034B4C5654BE10B14" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Activity In Allowance For Credit Losses [Abstract]</link:label>
    <link:label id="lab_bokf_ActivityInAllowanceForCreditLossesAbstract_C43F3297D6127B1034B4C5654BE10B14_documentation_en-US" xlink:label="lab_bokf_ActivityInAllowanceForCreditLossesAbstract_C43F3297D6127B1034B4C5654BE10B14" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ActivityInAllowanceForCreditLossesAbstract" xlink:label="loc_bokf_ActivityInAllowanceForCreditLossesAbstract_C43F3297D6127B1034B4C5654BE10B14" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ActivityInAllowanceForCreditLossesAbstract_C43F3297D6127B1034B4C5654BE10B14" xlink:to="lab_bokf_ActivityInAllowanceForCreditLossesAbstract_C43F3297D6127B1034B4C5654BE10B14" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_BA01E0E12646966485BCC5654BE1B62A_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_BA01E0E12646966485BCC5654BE1B62A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for loan losses [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_BA01E0E12646966485BCC5654BE1B62A_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_BA01E0E12646966485BCC5654BE1B62A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit 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_FinancingReceivableAllowanceForCreditLossesRollForward" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_BA01E0E12646966485BCC5654BE1B62A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_BA01E0E12646966485BCC5654BE1B62A" xlink:to="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_BA01E0E12646966485BCC5654BE1B62A" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowance_15386C95A4E955F53A81C5654BE24B2A_periodStartLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowance_15386C95A4E955F53A81C5654BE24B2A" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</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_15386C95A4E955F53A81C5654BE24B2A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowance_15386C95A4E955F53A81C5654BE24B2A" xlink:to="lab_us-gaap_LoansAndLeasesReceivableAllowance_15386C95A4E955F53A81C5654BE24B2A" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProvisionForLoanAndLeaseLosses_A5F6FFB492AEC8FB549AC5654BE2ADC5_terseLabel_en-US" xlink:label="lab_us-gaap_ProvisionForLoanAndLeaseLosses_A5F6FFB492AEC8FB549AC5654BE2ADC5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provision for loan losses</link:label>
    <link:label id="lab_us-gaap_ProvisionForLoanAndLeaseLosses_A5F6FFB492AEC8FB549AC5654BE2ADC5_label_en-US" xlink:label="lab_us-gaap_ProvisionForLoanAndLeaseLosses_A5F6FFB492AEC8FB549AC5654BE2ADC5" 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_A5F6FFB492AEC8FB549AC5654BE2ADC5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProvisionForLoanAndLeaseLosses_A5F6FFB492AEC8FB549AC5654BE2ADC5" xlink:to="lab_us-gaap_ProvisionForLoanAndLeaseLosses_A5F6FFB492AEC8FB549AC5654BE2ADC5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_2A148BAC90D332ED47F5C5654BE22146_negatedLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_2A148BAC90D332ED47F5C5654BE22146" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Loans charged off</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_2A148BAC90D332ED47F5C5654BE22146_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_2A148BAC90D332ED47F5C5654BE22146" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Losses, Write-downs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_2A148BAC90D332ED47F5C5654BE22146" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_2A148BAC90D332ED47F5C5654BE22146" xlink:to="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs_2A148BAC90D332ED47F5C5654BE22146" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_B9F1E22879F292293D31C5654BE20D47_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_B9F1E22879F292293D31C5654BE20D47" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recoveries</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_B9F1E22879F292293D31C5654BE20D47_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_B9F1E22879F292293D31C5654BE20D47" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Losses, Recovery</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_B9F1E22879F292293D31C5654BE20D47" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_B9F1E22879F292293D31C5654BE20D47" xlink:to="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery_B9F1E22879F292293D31C5654BE20D47" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableAllowance_6F2BB3AA802AB2F5530CC5654BE26CDF_periodEndLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableAllowance_6F2BB3AA802AB2F5530CC5654BE26CDF" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</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_6F2BB3AA802AB2F5530CC5654BE26CDF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowance_6F2BB3AA802AB2F5530CC5654BE26CDF" xlink:to="lab_us-gaap_LoansAndLeasesReceivableAllowance_6F2BB3AA802AB2F5530CC5654BE26CDF" xlink:type="arc" />
    <link:label id="lab_bokf_AllowanceForOffBalanceSheetCreditLossesAbstract_4523A5598A107E96ACD6C5654BE37C18_verboseLabel_en-US" xlink:label="lab_bokf_AllowanceForOffBalanceSheetCreditLossesAbstract_4523A5598A107E96ACD6C5654BE37C18" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Allowance for off-balance sheet credit losses [Abstract]</link:label>
    <link:label id="lab_bokf_AllowanceForOffBalanceSheetCreditLossesAbstract_4523A5598A107E96ACD6C5654BE37C18_label_en-US" xlink:label="lab_bokf_AllowanceForOffBalanceSheetCreditLossesAbstract_4523A5598A107E96ACD6C5654BE37C18" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allowance For Off-Balance Sheet Credit Losses [Abstract]</link:label>
    <link:label id="lab_bokf_AllowanceForOffBalanceSheetCreditLossesAbstract_4523A5598A107E96ACD6C5654BE37C18_documentation_en-US" xlink:label="lab_bokf_AllowanceForOffBalanceSheetCreditLossesAbstract_4523A5598A107E96ACD6C5654BE37C18" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_AllowanceForOffBalanceSheetCreditLossesAbstract" xlink:label="loc_bokf_AllowanceForOffBalanceSheetCreditLossesAbstract_4523A5598A107E96ACD6C5654BE37C18" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_AllowanceForOffBalanceSheetCreditLossesAbstract_4523A5598A107E96ACD6C5654BE37C18" xlink:to="lab_bokf_AllowanceForOffBalanceSheetCreditLossesAbstract_4523A5598A107E96ACD6C5654BE37C18" xlink:type="arc" />
    <link:label id="lab_us-gaap_MovementInValuationAllowancesAndReservesRollForward_4E40D6F910FFAF6E5011C5654BE395E9_terseLabel_en-US" xlink:label="lab_us-gaap_MovementInValuationAllowancesAndReservesRollForward_4E40D6F910FFAF6E5011C5654BE395E9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allowance for off-balance sheet credit losses [Roll Forward]</link:label>
    <link:label id="lab_us-gaap_MovementInValuationAllowancesAndReservesRollForward_4E40D6F910FFAF6E5011C5654BE395E9_label_en-US" xlink:label="lab_us-gaap_MovementInValuationAllowancesAndReservesRollForward_4E40D6F910FFAF6E5011C5654BE395E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_4E40D6F910FFAF6E5011C5654BE395E9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_4E40D6F910FFAF6E5011C5654BE395E9" xlink:to="lab_us-gaap_MovementInValuationAllowancesAndReservesRollForward_4E40D6F910FFAF6E5011C5654BE395E9" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesBalance_74FA6A45925899D48047C5654BE34185_periodStartLabel_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesBalance_74FA6A45925899D48047C5654BE34185" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance</link:label>
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesBalance_74FA6A45925899D48047C5654BE34185_label_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesBalance_74FA6A45925899D48047C5654BE34185" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_74FA6A45925899D48047C5654BE34185" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesBalance_74FA6A45925899D48047C5654BE34185" xlink:to="lab_us-gaap_ValuationAllowancesAndReservesBalance_74FA6A45925899D48047C5654BE34185" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProvisionForOtherCreditLosses_4880368E287213C81E68C5654BE35933_terseLabel_en-US" xlink:label="lab_us-gaap_ProvisionForOtherCreditLosses_4880368E287213C81E68C5654BE35933" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Provision for off-balance sheet credit losses</link:label>
    <link:label id="lab_us-gaap_ProvisionForOtherCreditLosses_4880368E287213C81E68C5654BE35933_label_en-US" xlink:label="lab_us-gaap_ProvisionForOtherCreditLosses_4880368E287213C81E68C5654BE35933" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Provision for Other Credit Losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProvisionForOtherCreditLosses" xlink:label="loc_us-gaap_ProvisionForOtherCreditLosses_4880368E287213C81E68C5654BE35933" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProvisionForOtherCreditLosses_4880368E287213C81E68C5654BE35933" xlink:to="lab_us-gaap_ProvisionForOtherCreditLosses_4880368E287213C81E68C5654BE35933" xlink:type="arc" />
    <link:label id="lab_us-gaap_ValuationAllowancesAndReservesBalance_AF5B0F9390257A2844C3C5654BE36C43_periodEndLabel_en-US" xlink:label="lab_us-gaap_ValuationAllowancesAndReservesBalance_AF5B0F9390257A2844C3C5654BE36C43" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Ending balance</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_AF5B0F9390257A2844C3C5654BE36C43" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesBalance_AF5B0F9390257A2844C3C5654BE36C43" xlink:to="lab_us-gaap_ValuationAllowancesAndReservesBalance_AF5B0F9390257A2844C3C5654BE36C43" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProvisionForLoanLeaseAndOtherLosses_2D8F0B218CFEAC76B239C5654BE4D05D_verboseLabel_en-US" xlink:label="lab_us-gaap_ProvisionForLoanLeaseAndOtherLosses_2D8F0B218CFEAC76B239C5654BE4D05D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total provision for credit losses</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_2D8F0B218CFEAC76B239C5654BE4D05D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_2D8F0B218CFEAC76B239C5654BE4D05D" xlink:to="lab_us-gaap_ProvisionForLoanLeaseAndOtherLosses_2D8F0B218CFEAC76B239C5654BE4D05D" xlink:type="arc" />
    <link:label id="lab_bokf_RecordedInvestmentAbstract_1577CF125F2AC4A2E66BC5654BE41503_verboseLabel_en-US" xlink:label="lab_bokf_RecordedInvestmentAbstract_1577CF125F2AC4A2E66BC5654BE41503" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Recorded investment [Abstract]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_RecordedInvestmentAbstract" xlink:label="loc_bokf_RecordedInvestmentAbstract_1577CF125F2AC4A2E66BC5654BE41503" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_RecordedInvestmentAbstract_1577CF125F2AC4A2E66BC5654BE41503" xlink:to="lab_bokf_RecordedInvestmentAbstract_1577CF125F2AC4A2E66BC5654BE41503" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_34B9FA04385FE960E360C5654BE46C0E_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_34B9FA04385FE960E360C5654BE46C0E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collectively measured for impairment, recorded investment</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_34B9FA04385FE960E360C5654BE46C0E_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_34B9FA04385FE960E360C5654BE46C0E" 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_34B9FA04385FE960E360C5654BE46C0E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_34B9FA04385FE960E360C5654BE46C0E" xlink:to="lab_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_34B9FA04385FE960E360C5654BE46C0E" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_23BF16D250CEA0670B5EC5654BE4EF25_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_23BF16D250CEA0670B5EC5654BE4EF25" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Individually measured for impairment, recorded investment</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_23BF16D250CEA0670B5EC5654BE4EF25_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_23BF16D250CEA0670B5EC5654BE4EF25" 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_23BF16D250CEA0670B5EC5654BE4EF25" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_23BF16D250CEA0670B5EC5654BE4EF25" xlink:to="lab_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_23BF16D250CEA0670B5EC5654BE4EF25" xlink:type="arc" />
    <link:label id="lab_bokf_RelatedAllowanceAbstract_F8DA847FE78007A2F251C5654BE4FD7D_verboseLabel_en-US" xlink:label="lab_bokf_RelatedAllowanceAbstract_F8DA847FE78007A2F251C5654BE4FD7D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Related allowance [Abstract]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_RelatedAllowanceAbstract" xlink:label="loc_bokf_RelatedAllowanceAbstract_F8DA847FE78007A2F251C5654BE4FD7D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_RelatedAllowanceAbstract_F8DA847FE78007A2F251C5654BE4FD7D" xlink:to="lab_bokf_RelatedAllowanceAbstract_F8DA847FE78007A2F251C5654BE4FD7D" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_84908E6B0A29B5172F55C5654BE50238_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_84908E6B0A29B5172F55C5654BE50238" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Collectively measured for impairment, related allowance</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_84908E6B0A29B5172F55C5654BE50238_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_84908E6B0A29B5172F55C5654BE50238" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Losses, 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_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_84908E6B0A29B5172F55C5654BE50238" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_84908E6B0A29B5172F55C5654BE50238" xlink:to="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_84908E6B0A29B5172F55C5654BE50238" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_7AF57AFCEC858F4561CDC5654BE5849C_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_7AF57AFCEC858F4561CDC5654BE5849C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Individually measured for impairment, related allowance</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_7AF57AFCEC858F4561CDC5654BE5849C_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_7AF57AFCEC858F4561CDC5654BE5849C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Allowance for Credit Losses, 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_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_7AF57AFCEC858F4561CDC5654BE5849C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_7AF57AFCEC858F4561CDC5654BE5849C" xlink:to="lab_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_7AF57AFCEC858F4561CDC5654BE5849C" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_8C3658CAE7274EB78B43D47EA836A6E4_verboseLabel_en-US" xlink:label="lab_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_8C3658CAE7274EB78B43D47EA836A6E4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Loans [Text Block]</link:label>
    <link:label id="lab_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_8C3658CAE7274EB78B43D47EA836A6E4_label_en-US" xlink:label="lab_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_8C3658CAE7274EB78B43D47EA836A6E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans, Notes, Trade and Other Receivables 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_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock" xlink:label="loc_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_8C3658CAE7274EB78B43D47EA836A6E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_8C3658CAE7274EB78B43D47EA836A6E4" xlink:to="lab_us-gaap_LoansNotesTradeAndOtherReceivablesDisclosureTextBlock_8C3658CAE7274EB78B43D47EA836A6E4" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_32C80B6BC27DEC022FADD47EA7751D50_verboseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_32C80B6BC27DEC022FADD47EA7751D50" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Derivatives [Text Block]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_32C80B6BC27DEC022FADD47EA7751D50_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_32C80B6BC27DEC022FADD47EA7751D50" 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_32C80B6BC27DEC022FADD47EA7751D50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_32C80B6BC27DEC022FADD47EA7751D50" xlink:to="lab_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_32C80B6BC27DEC022FADD47EA7751D50" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetsAbstract_B560CD2C1C33BBD023D1C5654B090378_verboseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_B560CD2C1C33BBD023D1C5654B090378" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" 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_B560CD2C1C33BBD023D1C5654B090378" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract_B560CD2C1C33BBD023D1C5654B090378" xlink:to="lab_us-gaap_AssetsAbstract_B560CD2C1C33BBD023D1C5654B090378" xlink:type="arc" />
    <link:label id="lab_us-gaap_MortgagesHeldForSaleFairValueDisclosure_1855824C78758CE37477C5654B09E8DE_terseLabel_en-US" xlink:label="lab_us-gaap_MortgagesHeldForSaleFairValueDisclosure_1855824C78758CE37477C5654B09E8DE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential mortgage loans held for sale</link:label>
    <link:label id="lab_us-gaap_MortgagesHeldForSaleFairValueDisclosure_1855824C78758CE37477C5654B09E8DE_label_en-US" xlink:label="lab_us-gaap_MortgagesHeldForSaleFairValueDisclosure_1855824C78758CE37477C5654B09E8DE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Mortgages 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_MortgagesHeldForSaleFairValueDisclosure" xlink:label="loc_us-gaap_MortgagesHeldForSaleFairValueDisclosure_1855824C78758CE37477C5654B09E8DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MortgagesHeldForSaleFairValueDisclosure_1855824C78758CE37477C5654B09E8DE" xlink:to="lab_us-gaap_MortgagesHeldForSaleFairValueDisclosure_1855824C78758CE37477C5654B09E8DE" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeAssets_3EF6FEC2CD010EEDA400C5654B09C920_verboseLabel_en-US" xlink:label="lab_us-gaap_DerivativeAssets_3EF6FEC2CD010EEDA400C5654B09C920" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Derviative contracts, net of cash collateral, Assets, Fair value</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_3EF6FEC2CD010EEDA400C5654B09C920" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeAssets_3EF6FEC2CD010EEDA400C5654B09C920" xlink:to="lab_us-gaap_DerivativeAssets_3EF6FEC2CD010EEDA400C5654B09C920" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeLiabilities_0ED7AE4D3AE31E9DD01EC5654B09FDBC_verboseLabel_en-US" xlink:label="lab_us-gaap_DerivativeLiabilities_0ED7AE4D3AE31E9DD01EC5654B09FDBC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Derivative contracts, net of cash collateral, Liabilities, Fair Value</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_0ED7AE4D3AE31E9DD01EC5654B09FDBC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeLiabilities_0ED7AE4D3AE31E9DD01EC5654B09FDBC" xlink:to="lab_us-gaap_DerivativeLiabilities_0ED7AE4D3AE31E9DD01EC5654B09FDBC" xlink:type="arc" />
    <link:label id="lab_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_2AC70005383A4C1CD193C5654BA88EE2_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_2AC70005383A4C1CD193C5654BA88EE2" 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_2AC70005383A4C1CD193C5654BA88EE2_label_en-US" xlink:label="lab_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_2AC70005383A4C1CD193C5654BA88EE2" 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_2AC70005383A4C1CD193C5654BA88EE2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_2AC70005383A4C1CD193C5654BA88EE2" xlink:to="lab_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_2AC70005383A4C1CD193C5654BA88EE2" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_937E6D3ED5CB959C42AFC5654BA8B07A_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_937E6D3ED5CB959C42AFC5654BA8B07A" 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_937E6D3ED5CB959C42AFC5654BA8B07A_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_937E6D3ED5CB959C42AFC5654BA8B07A" 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_937E6D3ED5CB959C42AFC5654BA8B07A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_937E6D3ED5CB959C42AFC5654BA8B07A" xlink:to="lab_us-gaap_FinancingReceivablesPeriodPastDueAxis_937E6D3ED5CB959C42AFC5654BA8B07A" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_9C7A68BC78F8522D733EC5654BA99763_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_9C7A68BC78F8522D733EC5654BA99763" 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_9C7A68BC78F8522D733EC5654BA99763_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_9C7A68BC78F8522D733EC5654BA99763" 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_9C7A68BC78F8522D733EC5654BA99763" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_9C7A68BC78F8522D733EC5654BA99763" xlink:to="lab_us-gaap_FinancingReceivablesPeriodPastDueDomain_9C7A68BC78F8522D733EC5654BA99763" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_C1F2C43D61DC2EEF15DDC5654BA96F6F_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_C1F2C43D61DC2EEF15DDC5654BA96F6F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">30 to 59 Days [Member]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_C1F2C43D61DC2EEF15DDC5654BA96F6F_label_en-US" xlink:label="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_C1F2C43D61DC2EEF15DDC5654BA96F6F" 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_C1F2C43D61DC2EEF15DDC5654BA96F6F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_C1F2C43D61DC2EEF15DDC5654BA96F6F" xlink:to="lab_us-gaap_FinancingReceivables30To59DaysPastDueMember_C1F2C43D61DC2EEF15DDC5654BA96F6F" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_70CBE7065B450932DE74C5654BA9B4B0_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_70CBE7065B450932DE74C5654BA9B4B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">60 to 89 Days [Member]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_70CBE7065B450932DE74C5654BA9B4B0_label_en-US" xlink:label="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_70CBE7065B450932DE74C5654BA9B4B0" 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_70CBE7065B450932DE74C5654BA9B4B0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_70CBE7065B450932DE74C5654BA9B4B0" xlink:to="lab_us-gaap_FinancingReceivables60To89DaysPastDueMember_70CBE7065B450932DE74C5654BA9B4B0" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_4B9524E886E9BC309D09C5654BA9DC64_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_4B9524E886E9BC309D09C5654BA9DC64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">90 Days or More [Member]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_4B9524E886E9BC309D09C5654BA9DC64_label_en-US" xlink:label="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_4B9524E886E9BC309D09C5654BA9DC64" 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_4B9524E886E9BC309D09C5654BA9DC64" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_4B9524E886E9BC309D09C5654BA9DC64" xlink:to="lab_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_4B9524E886E9BC309D09C5654BA9DC64" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_869A72D418D60D343F3EC5654BAD8434_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_869A72D418D60D343F3EC5654BAD8434" 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_869A72D418D60D343F3EC5654BAD8434_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_869A72D418D60D343F3EC5654BAD8434" 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_869A72D418D60D343F3EC5654BAD8434" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_869A72D418D60D343F3EC5654BAD8434" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_869A72D418D60D343F3EC5654BAD8434" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_8EEE9550A0C7E81B2AC0C5654BADBC75_verboseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_8EEE9550A0C7E81B2AC0C5654BADBC75" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Financing receivable, recorded investment, aging [Abstract]</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_8EEE9550A0C7E81B2AC0C5654BADBC75_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_8EEE9550A0C7E81B2AC0C5654BADBC75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, Aging [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_8EEE9550A0C7E81B2AC0C5654BADBC75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_8EEE9550A0C7E81B2AC0C5654BADBC75" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_8EEE9550A0C7E81B2AC0C5654BADBC75" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentCurrent_F1E5E75B2AC289CEF95AC5654BAE80D6_verboseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentCurrent_F1E5E75B2AC289CEF95AC5654BAE80D6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Current</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentCurrent_F1E5E75B2AC289CEF95AC5654BAE80D6_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentCurrent_F1E5E75B2AC289CEF95AC5654BAE80D6" 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_F1E5E75B2AC289CEF95AC5654BAE80D6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_F1E5E75B2AC289CEF95AC5654BAE80D6" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentCurrent_F1E5E75B2AC289CEF95AC5654BAE80D6" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDue_77177A3764E28BA4843EC5654BAEE8D5_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDue_77177A3764E28BA4843EC5654BAEE8D5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Past Due</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDue_77177A3764E28BA4843EC5654BAEE8D5_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDue_77177A3764E28BA4843EC5654BAEE8D5" 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_77177A3764E28BA4843EC5654BAEE8D5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDue_77177A3764E28BA4843EC5654BAEE8D5" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentPastDue_77177A3764E28BA4843EC5654BAEE8D5" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_284B674CB71B6BF30037C5654BAED299_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_284B674CB71B6BF30037C5654BAED299" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Nonaccrual</link:label>
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_284B674CB71B6BF30037C5654BAED299_label_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_284B674CB71B6BF30037C5654BAED299" 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_284B674CB71B6BF30037C5654BAED299" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_284B674CB71B6BF30037C5654BAED299" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus_284B674CB71B6BF30037C5654BAED299" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_099B019ADA2C01D5D502C5654BAE64A3_verboseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_099B019ADA2C01D5D502C5654BAE64A3" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total</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_099B019ADA2C01D5D502C5654BAE64A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_099B019ADA2C01D5D502C5654BAE64A3" xlink:to="lab_us-gaap_LoansAndLeasesReceivableGrossCarryingAmount_099B019ADA2C01D5D502C5654BAE64A3" xlink:type="arc" />
    <link:label id="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleTable_53FADBCFBC27AD7ABCC6B12F8ADD56CC_terseLabel_en-US" xlink:label="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleTable_53FADBCFBC27AD7ABCC6B12F8ADD56CC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Residential Mortgage Loans Held For Sale [Table]</link:label>
    <link:label id="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleTable_53FADBCFBC27AD7ABCC6B12F8ADD56CC_label_en-US" xlink:label="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleTable_53FADBCFBC27AD7ABCC6B12F8ADD56CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Residential Mortgage Loans Held For Sale [Table]</link:label>
    <link:label id="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleTable_53FADBCFBC27AD7ABCC6B12F8ADD56CC_documentation_en-US" xlink:label="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleTable_53FADBCFBC27AD7ABCC6B12F8ADD56CC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ScheduleOfResidentialMortgageLoansHeldForSaleTable" xlink:label="loc_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleTable_53FADBCFBC27AD7ABCC6B12F8ADD56CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleTable_53FADBCFBC27AD7ABCC6B12F8ADD56CC" xlink:to="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleTable_53FADBCFBC27AD7ABCC6B12F8ADD56CC" xlink:type="arc" />
    <link:label id="lab_bokf_ResidentialMortgageLoanCommitmentsMember_05175E016E770BD4C8CEB12F8ADE3E62_terseLabel_en-US" xlink:label="lab_bokf_ResidentialMortgageLoanCommitmentsMember_05175E016E770BD4C8CEB12F8ADE3E62" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential Mortgage Loan Commitments [Member]</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoanCommitmentsMember_05175E016E770BD4C8CEB12F8ADE3E62_label_en-US" xlink:label="lab_bokf_ResidentialMortgageLoanCommitmentsMember_05175E016E770BD4C8CEB12F8ADE3E62" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Mortgage Loan Commitments [Member]</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoanCommitmentsMember_05175E016E770BD4C8CEB12F8ADE3E62_documentation_en-US" xlink:label="lab_bokf_ResidentialMortgageLoanCommitmentsMember_05175E016E770BD4C8CEB12F8ADE3E62" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represent contracts related to mortgage loan commitments to purchase.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ResidentialMortgageLoanCommitmentsMember" xlink:label="loc_bokf_ResidentialMortgageLoanCommitmentsMember_05175E016E770BD4C8CEB12F8ADE3E62" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ResidentialMortgageLoanCommitmentsMember_05175E016E770BD4C8CEB12F8ADE3E62" xlink:to="lab_bokf_ResidentialMortgageLoanCommitmentsMember_05175E016E770BD4C8CEB12F8ADE3E62" xlink:type="arc" />
    <link:label id="lab_bokf_ForwardSalesContractsMember_87CEB6852CB62418555CB12F8ADF524B_terseLabel_en-US" xlink:label="lab_bokf_ForwardSalesContractsMember_87CEB6852CB62418555CB12F8ADF524B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Forward sales contracts [Member]</link:label>
    <link:label id="lab_bokf_ForwardSalesContractsMember_87CEB6852CB62418555CB12F8ADF524B_label_en-US" xlink:label="lab_bokf_ForwardSalesContractsMember_87CEB6852CB62418555CB12F8ADF524B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Forward sales contracts [Member]</link:label>
    <link:label id="lab_bokf_ForwardSalesContractsMember_87CEB6852CB62418555CB12F8ADF524B_documentation_en-US" xlink:label="lab_bokf_ForwardSalesContractsMember_87CEB6852CB62418555CB12F8ADF524B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents forward contracts to purchase mortgage loans.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ForwardSalesContractsMember" xlink:label="loc_bokf_ForwardSalesContractsMember_87CEB6852CB62418555CB12F8ADF524B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ForwardSalesContractsMember_87CEB6852CB62418555CB12F8ADF524B" xlink:to="lab_bokf_ForwardSalesContractsMember_87CEB6852CB62418555CB12F8ADF524B" xlink:type="arc" />
    <link:label id="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleLineItems_0DC75BFE3E56C9FFADF8B12F8ADF034A_terseLabel_en-US" xlink:label="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleLineItems_0DC75BFE3E56C9FFADF8B12F8ADF034A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Residential Mortgage Loans Held For Sale [Line Items]</link:label>
    <link:label id="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleLineItems_0DC75BFE3E56C9FFADF8B12F8ADF034A_label_en-US" xlink:label="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleLineItems_0DC75BFE3E56C9FFADF8B12F8ADF034A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Residential Mortgage Loans Held For Sale [Line Items]</link:label>
    <link:label id="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleLineItems_0DC75BFE3E56C9FFADF8B12F8ADF034A_documentation_en-US" xlink:label="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleLineItems_0DC75BFE3E56C9FFADF8B12F8ADF034A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ScheduleOfResidentialMortgageLoansHeldForSaleLineItems" xlink:label="loc_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleLineItems_0DC75BFE3E56C9FFADF8B12F8ADF034A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleLineItems_0DC75BFE3E56C9FFADF8B12F8ADF034A" xlink:to="lab_bokf_ScheduleOfResidentialMortgageLoansHeldForSaleLineItems_0DC75BFE3E56C9FFADF8B12F8ADF034A" xlink:type="arc" />
    <link:label id="lab_bokf_MinimumNumberofDaysOutstandingForResidentialMortgageCommitments_9D8EB5780219E7FAA616B12F8AE0114C_terseLabel_en-US" xlink:label="lab_bokf_MinimumNumberofDaysOutstandingForResidentialMortgageCommitments_9D8EB5780219E7FAA616B12F8AE0114C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General number of days outstanding for residential mortgage commitments, minimum (in days)</link:label>
    <link:label id="lab_bokf_MinimumNumberofDaysOutstandingForResidentialMortgageCommitments_9D8EB5780219E7FAA616B12F8AE0114C_label_en-US" xlink:label="lab_bokf_MinimumNumberofDaysOutstandingForResidentialMortgageCommitments_9D8EB5780219E7FAA616B12F8AE0114C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum Number of Days Outstanding For Residential Mortgage Commitments</link:label>
    <link:label id="lab_bokf_MinimumNumberofDaysOutstandingForResidentialMortgageCommitments_9D8EB5780219E7FAA616B12F8AE0114C_documentation_en-US" xlink:label="lab_bokf_MinimumNumberofDaysOutstandingForResidentialMortgageCommitments_9D8EB5780219E7FAA616B12F8AE0114C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents represents the typical minimum period for commitment to originate a residential mortgage loan to when the closed loan is sold to an investor.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MinimumNumberofDaysOutstandingForResidentialMortgageCommitments" xlink:label="loc_bokf_MinimumNumberofDaysOutstandingForResidentialMortgageCommitments_9D8EB5780219E7FAA616B12F8AE0114C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MinimumNumberofDaysOutstandingForResidentialMortgageCommitments_9D8EB5780219E7FAA616B12F8AE0114C" xlink:to="lab_bokf_MinimumNumberofDaysOutstandingForResidentialMortgageCommitments_9D8EB5780219E7FAA616B12F8AE0114C" xlink:type="arc" />
    <link:label id="lab_bokf_MaximumNumberofDaysOutstandingForResidentialMortgageCommitments_137F1653703EFFC1E869B12F8AE04AF0_terseLabel_en-US" xlink:label="lab_bokf_MaximumNumberofDaysOutstandingForResidentialMortgageCommitments_137F1653703EFFC1E869B12F8AE04AF0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General number of days outstanding for residential mortgage commitments, maximum (in days)</link:label>
    <link:label id="lab_bokf_MaximumNumberofDaysOutstandingForResidentialMortgageCommitments_137F1653703EFFC1E869B12F8AE04AF0_label_en-US" xlink:label="lab_bokf_MaximumNumberofDaysOutstandingForResidentialMortgageCommitments_137F1653703EFFC1E869B12F8AE04AF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Number of Days Outstanding For Residential Mortgage Commitments</link:label>
    <link:label id="lab_bokf_MaximumNumberofDaysOutstandingForResidentialMortgageCommitments_137F1653703EFFC1E869B12F8AE04AF0_documentation_en-US" xlink:label="lab_bokf_MaximumNumberofDaysOutstandingForResidentialMortgageCommitments_137F1653703EFFC1E869B12F8AE04AF0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents represents the typical maximum period for commitment to originate a residential mortgage loan to when the closed loan is sold to an investor.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MaximumNumberofDaysOutstandingForResidentialMortgageCommitments" xlink:label="loc_bokf_MaximumNumberofDaysOutstandingForResidentialMortgageCommitments_137F1653703EFFC1E869B12F8AE04AF0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MaximumNumberofDaysOutstandingForResidentialMortgageCommitments_137F1653703EFFC1E869B12F8AE04AF0" xlink:to="lab_bokf_MaximumNumberofDaysOutstandingForResidentialMortgageCommitments_137F1653703EFFC1E869B12F8AE04AF0" xlink:type="arc" />
    <link:label id="lab_bokf_MinimumNumberofDaysforDeliveryofForwardSalesContracts_F68B6C793C2B192874A6B12F8AE08A20_terseLabel_en-US" xlink:label="lab_bokf_MinimumNumberofDaysforDeliveryofForwardSalesContracts_F68B6C793C2B192874A6B12F8AE08A20" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General number of days for delivery of loans, for which the price is set by forward sales contracts, minimum (in days)</link:label>
    <link:label id="lab_bokf_MinimumNumberofDaysforDeliveryofForwardSalesContracts_F68B6C793C2B192874A6B12F8AE08A20_label_en-US" xlink:label="lab_bokf_MinimumNumberofDaysforDeliveryofForwardSalesContracts_F68B6C793C2B192874A6B12F8AE08A20" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Minimum Number of Days for Delivery of Forward Sales Contracts</link:label>
    <link:label id="lab_bokf_MinimumNumberofDaysforDeliveryofForwardSalesContracts_F68B6C793C2B192874A6B12F8AE08A20_documentation_en-US" xlink:label="lab_bokf_MinimumNumberofDaysforDeliveryofForwardSalesContracts_F68B6C793C2B192874A6B12F8AE08A20" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the minimum number of days from the point of pricing being set to delivery of forward sales contracts.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MinimumNumberofDaysforDeliveryofForwardSalesContracts" xlink:label="loc_bokf_MinimumNumberofDaysforDeliveryofForwardSalesContracts_F68B6C793C2B192874A6B12F8AE08A20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MinimumNumberofDaysforDeliveryofForwardSalesContracts_F68B6C793C2B192874A6B12F8AE08A20" xlink:to="lab_bokf_MinimumNumberofDaysforDeliveryofForwardSalesContracts_F68B6C793C2B192874A6B12F8AE08A20" xlink:type="arc" />
    <link:label id="lab_bokf_MaximumNumberofDaysforDeliveryofForwardSalesContracts_8C237A5977D1B1FF3B54B12F8AE0A9D4_terseLabel_en-US" xlink:label="lab_bokf_MaximumNumberofDaysforDeliveryofForwardSalesContracts_8C237A5977D1B1FF3B54B12F8AE0A9D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General number of days for delivery for loans, for which the price is set by forward sales contracts, maximum (in days)</link:label>
    <link:label id="lab_bokf_MaximumNumberofDaysforDeliveryofForwardSalesContracts_8C237A5977D1B1FF3B54B12F8AE0A9D4_label_en-US" xlink:label="lab_bokf_MaximumNumberofDaysforDeliveryofForwardSalesContracts_8C237A5977D1B1FF3B54B12F8AE0A9D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maximum Number of Days for Delivery of Forward Sales Contracts</link:label>
    <link:label id="lab_bokf_MaximumNumberofDaysforDeliveryofForwardSalesContracts_8C237A5977D1B1FF3B54B12F8AE0A9D4_documentation_en-US" xlink:label="lab_bokf_MaximumNumberofDaysforDeliveryofForwardSalesContracts_8C237A5977D1B1FF3B54B12F8AE0A9D4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents represents the typical maximum number of days from the point pricing is set to delivery of forward sales contracts.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MaximumNumberofDaysforDeliveryofForwardSalesContracts" xlink:label="loc_bokf_MaximumNumberofDaysforDeliveryofForwardSalesContracts_8C237A5977D1B1FF3B54B12F8AE0A9D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MaximumNumberofDaysforDeliveryofForwardSalesContracts_8C237A5977D1B1FF3B54B12F8AE0A9D4" xlink:to="lab_bokf_MaximumNumberofDaysforDeliveryofForwardSalesContracts_8C237A5977D1B1FF3B54B12F8AE0A9D4" xlink:type="arc" />
    <link:label id="lab_bokf_NumberOfDaysForPastDueResidentialMortgageLoansHeldforSale_A1E85823390EFA4A5DD6B12F8AE063A8_verboseLabel_en-US" xlink:label="lab_bokf_NumberOfDaysForPastDueResidentialMortgageLoansHeldforSale_A1E85823390EFA4A5DD6B12F8AE063A8" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of days for past due for loan to be considered nonperforming (in days)</link:label>
    <link:label id="lab_bokf_NumberOfDaysForPastDueResidentialMortgageLoansHeldforSale_A1E85823390EFA4A5DD6B12F8AE063A8_label_en-US" xlink:label="lab_bokf_NumberOfDaysForPastDueResidentialMortgageLoansHeldforSale_A1E85823390EFA4A5DD6B12F8AE063A8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Days For Past Due Residential Mortgage Loans Held for Sale</link:label>
    <link:label id="lab_bokf_NumberOfDaysForPastDueResidentialMortgageLoansHeldforSale_A1E85823390EFA4A5DD6B12F8AE063A8_documentation_en-US" xlink:label="lab_bokf_NumberOfDaysForPastDueResidentialMortgageLoansHeldforSale_A1E85823390EFA4A5DD6B12F8AE063A8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the number of days past due for residential mortgage loans held for sale to be reported as delinquent.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NumberOfDaysForPastDueResidentialMortgageLoansHeldforSale" xlink:label="loc_bokf_NumberOfDaysForPastDueResidentialMortgageLoansHeldforSale_A1E85823390EFA4A5DD6B12F8AE063A8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NumberOfDaysForPastDueResidentialMortgageLoansHeldforSale_A1E85823390EFA4A5DD6B12F8AE063A8" xlink:to="lab_bokf_NumberOfDaysForPastDueResidentialMortgageLoansHeldforSale_A1E85823390EFA4A5DD6B12F8AE063A8" xlink:type="arc" />
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldForSaleNonperforming_7D12F64D9E8BC8ED00CBB12F8AE1C91B_terseLabel_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldForSaleNonperforming_7D12F64D9E8BC8ED00CBB12F8AE1C91B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential mortgage loans held for sale, nonperforming</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldForSaleNonperforming_7D12F64D9E8BC8ED00CBB12F8AE1C91B_label_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldForSaleNonperforming_7D12F64D9E8BC8ED00CBB12F8AE1C91B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential mortgage loans held for sale, nonperforming</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldForSaleNonperforming_7D12F64D9E8BC8ED00CBB12F8AE1C91B_documentation_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldForSaleNonperforming_7D12F64D9E8BC8ED00CBB12F8AE1C91B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Residential mortgage loans held for sale, 90 days past due or impaired.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ResidentialMortgageLoansHeldForSaleNonperforming" xlink:label="loc_bokf_ResidentialMortgageLoansHeldForSaleNonperforming_7D12F64D9E8BC8ED00CBB12F8AE1C91B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ResidentialMortgageLoansHeldForSaleNonperforming_7D12F64D9E8BC8ED00CBB12F8AE1C91B" xlink:to="lab_bokf_ResidentialMortgageLoansHeldForSaleNonperforming_7D12F64D9E8BC8ED00CBB12F8AE1C91B" xlink:type="arc" />
    <link:label id="lab_bokf_CreditLossesRecognizedOnResidentialMortgageLoansHeldForSale_D9CB0271ADE95D88F102B12F8AE1FF66_terseLabel_en-US" xlink:label="lab_bokf_CreditLossesRecognizedOnResidentialMortgageLoansHeldForSale_D9CB0271ADE95D88F102B12F8AE1FF66" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Credit losses recognized on residential mortgage loans held for sale</link:label>
    <link:label id="lab_bokf_CreditLossesRecognizedOnResidentialMortgageLoansHeldForSale_D9CB0271ADE95D88F102B12F8AE1FF66_label_en-US" xlink:label="lab_bokf_CreditLossesRecognizedOnResidentialMortgageLoansHeldForSale_D9CB0271ADE95D88F102B12F8AE1FF66" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Credit losses recognized on residential mortgage loans held for sale</link:label>
    <link:label id="lab_bokf_CreditLossesRecognizedOnResidentialMortgageLoansHeldForSale_D9CB0271ADE95D88F102B12F8AE1FF66_documentation_en-US" xlink:label="lab_bokf_CreditLossesRecognizedOnResidentialMortgageLoansHeldForSale_D9CB0271ADE95D88F102B12F8AE1FF66" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Credit losses recognized on residential mortgage loans held for sale</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CreditLossesRecognizedOnResidentialMortgageLoansHeldForSale" xlink:label="loc_bokf_CreditLossesRecognizedOnResidentialMortgageLoansHeldForSale_D9CB0271ADE95D88F102B12F8AE1FF66" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CreditLossesRecognizedOnResidentialMortgageLoansHeldForSale_D9CB0271ADE95D88F102B12F8AE1FF66" xlink:to="lab_bokf_CreditLossesRecognizedOnResidentialMortgageLoansHeldForSale_D9CB0271ADE95D88F102B12F8AE1FF66" xlink:type="arc" />
    <link:label id="lab_bokf_ComponentsofResidentialMortgageLoansHeldforSaleAbstract_BE694F6CE9C84ED15A8FB12F8AE16470_terseLabel_en-US" xlink:label="lab_bokf_ComponentsofResidentialMortgageLoansHeldforSaleAbstract_BE694F6CE9C84ED15A8FB12F8AE16470" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Components of Residential Mortgage Loans Held for Sale [Abstract]</link:label>
    <link:label id="lab_bokf_ComponentsofResidentialMortgageLoansHeldforSaleAbstract_BE694F6CE9C84ED15A8FB12F8AE16470_label_en-US" xlink:label="lab_bokf_ComponentsofResidentialMortgageLoansHeldforSaleAbstract_BE694F6CE9C84ED15A8FB12F8AE16470" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Components of Residential Mortgage Loans Held for Sale [Abstract]</link:label>
    <link:label id="lab_bokf_ComponentsofResidentialMortgageLoansHeldforSaleAbstract_BE694F6CE9C84ED15A8FB12F8AE16470_documentation_en-US" xlink:label="lab_bokf_ComponentsofResidentialMortgageLoansHeldforSaleAbstract_BE694F6CE9C84ED15A8FB12F8AE16470" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the individual components of residential mortgage loans held for sale</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ComponentsofResidentialMortgageLoansHeldforSaleAbstract" xlink:label="loc_bokf_ComponentsofResidentialMortgageLoansHeldforSaleAbstract_BE694F6CE9C84ED15A8FB12F8AE16470" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ComponentsofResidentialMortgageLoansHeldforSaleAbstract_BE694F6CE9C84ED15A8FB12F8AE16470" xlink:to="lab_bokf_ComponentsofResidentialMortgageLoansHeldforSaleAbstract_BE694F6CE9C84ED15A8FB12F8AE16470" xlink:type="arc" />
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldForSaleUnpaidPrincipalBalanceGross_12A44B024B913ADD93E7B12F8AE1C992_terseLabel_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldForSaleUnpaidPrincipalBalanceGross_12A44B024B913ADD93E7B12F8AE1C992" 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_bokf_ResidentialMortgageLoansHeldForSaleUnpaidPrincipalBalanceGross_12A44B024B913ADD93E7B12F8AE1C992_label_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldForSaleUnpaidPrincipalBalanceGross_12A44B024B913ADD93E7B12F8AE1C992" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Mortgage Loans Held For Sale Unpaid Principal Balance, Gross</link:label>
    <link:label id="lab_bokf_ResidentialMortgageLoansHeldForSaleUnpaidPrincipalBalanceGross_12A44B024B913ADD93E7B12F8AE1C992_documentation_en-US" xlink:label="lab_bokf_ResidentialMortgageLoansHeldForSaleUnpaidPrincipalBalanceGross_12A44B024B913ADD93E7B12F8AE1C992" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Unpaid principal balance of loans held for sale.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ResidentialMortgageLoansHeldForSaleUnpaidPrincipalBalanceGross" xlink:label="loc_bokf_ResidentialMortgageLoansHeldForSaleUnpaidPrincipalBalanceGross_12A44B024B913ADD93E7B12F8AE1C992" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ResidentialMortgageLoansHeldForSaleUnpaidPrincipalBalanceGross_12A44B024B913ADD93E7B12F8AE1C992" xlink:to="lab_bokf_ResidentialMortgageLoansHeldForSaleUnpaidPrincipalBalanceGross_12A44B024B913ADD93E7B12F8AE1C992" xlink:type="arc" />
    <link:label id="lab_invest_DerivativeNotionalAmount_60E28DDD7E409EB2AB61B12F8AE10FED_verboseLabel_en-US" xlink:label="lab_invest_DerivativeNotionalAmount_60E28DDD7E409EB2AB61B12F8AE10FED" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Notional</link:label>
    <link:label id="lab_invest_DerivativeNotionalAmount_60E28DDD7E409EB2AB61B12F8AE10FED_label_en-US" xlink:label="lab_invest_DerivativeNotionalAmount_60E28DDD7E409EB2AB61B12F8AE10FED" 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_60E28DDD7E409EB2AB61B12F8AE10FED" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_invest_DerivativeNotionalAmount_60E28DDD7E409EB2AB61B12F8AE10FED" xlink:to="lab_invest_DerivativeNotionalAmount_60E28DDD7E409EB2AB61B12F8AE10FED" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueofResidentialMortgageLoansHeldforSale_3D21A66E9CB4D7A7009EB12F8AE1354D_terseLabel_en-US" xlink:label="lab_bokf_FairValueofResidentialMortgageLoansHeldforSale_3D21A66E9CB4D7A7009EB12F8AE1354D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential mortgage loans held for sale, Fair value</link:label>
    <link:label id="lab_bokf_FairValueofResidentialMortgageLoansHeldforSale_3D21A66E9CB4D7A7009EB12F8AE1354D_label_en-US" xlink:label="lab_bokf_FairValueofResidentialMortgageLoansHeldforSale_3D21A66E9CB4D7A7009EB12F8AE1354D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value of Residential Mortgage Loans Held for Sale</link:label>
    <link:label id="lab_bokf_FairValueofResidentialMortgageLoansHeldforSale_3D21A66E9CB4D7A7009EB12F8AE1354D_documentation_en-US" xlink:label="lab_bokf_FairValueofResidentialMortgageLoansHeldforSale_3D21A66E9CB4D7A7009EB12F8AE1354D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the fair value of residential mortgage loans held for sale as of the balance sheet, exclusive of mortgage commitments and forward sales contracts</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueofResidentialMortgageLoansHeldforSale" xlink:label="loc_bokf_FairValueofResidentialMortgageLoansHeldforSale_3D21A66E9CB4D7A7009EB12F8AE1354D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueofResidentialMortgageLoansHeldforSale_3D21A66E9CB4D7A7009EB12F8AE1354D" xlink:to="lab_bokf_FairValueofResidentialMortgageLoansHeldforSale_3D21A66E9CB4D7A7009EB12F8AE1354D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeNet_7580FEBE8565E5508619B12F8AE2F179_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeNet_7580FEBE8565E5508619B12F8AE2F179" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative, Net fair value</link:label>
    <link:label id="lab_us-gaap_DerivativeFairValueOfDerivativeNet_7580FEBE8565E5508619B12F8AE2F179_label_en-US" xlink:label="lab_us-gaap_DerivativeFairValueOfDerivativeNet_7580FEBE8565E5508619B12F8AE2F179" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative, Fair Value, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeNet" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_7580FEBE8565E5508619B12F8AE2F179" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DerivativeFairValueOfDerivativeNet_7580FEBE8565E5508619B12F8AE2F179" xlink:to="lab_us-gaap_DerivativeFairValueOfDerivativeNet_7580FEBE8565E5508619B12F8AE2F179" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_C982687DF2B1CC320CA4B12F8AE2BA79_verboseLabel_en-US" xlink:label="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_C982687DF2B1CC320CA4B12F8AE2BA79" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Total residential mortgage loans held for sale and mortgage loan commitments, net of forward sales contracts</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage" xlink:label="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_C982687DF2B1CC320CA4B12F8AE2BA79" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_C982687DF2B1CC320CA4B12F8AE2BA79" xlink:to="lab_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroupMortgage_C982687DF2B1CC320CA4B12F8AE2BA79" xlink:type="arc" />
    <link:label id="lab_bokf_DocumentAndEntityInformationAbstract_1B3C9A6895AF4A3843F9C5C6FF20107B_label_en-US" xlink:label="lab_bokf_DocumentAndEntityInformationAbstract_1B3C9A6895AF4A3843F9C5C6FF20107B" 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_bokf_DocumentAndEntityInformationAbstract_1B3C9A6895AF4A3843F9C5C6FF20107B_documentation_en-US" xlink:label="lab_bokf_DocumentAndEntityInformationAbstract_1B3C9A6895AF4A3843F9C5C6FF20107B" 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="bokf-20180630.xsd#bokf_DocumentAndEntityInformationAbstract" xlink:label="loc_bokf_DocumentAndEntityInformationAbstract_1B3C9A6895AF4A3843F9C5C6FF20107B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DocumentAndEntityInformationAbstract_1B3C9A6895AF4A3843F9C5C6FF20107B" xlink:to="lab_bokf_DocumentAndEntityInformationAbstract_1B3C9A6895AF4A3843F9C5C6FF20107B" xlink:type="arc" />
    <link:label id="lab_dei_EntityRegistrantName_65794401CE9F2D0122FDC5C6FF20353B_terseLabel_en-US" xlink:label="lab_dei_EntityRegistrantName_65794401CE9F2D0122FDC5C6FF20353B" 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_65794401CE9F2D0122FDC5C6FF20353B_label_en-US" xlink:label="lab_dei_EntityRegistrantName_65794401CE9F2D0122FDC5C6FF20353B" 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_65794401CE9F2D0122FDC5C6FF20353B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityRegistrantName_65794401CE9F2D0122FDC5C6FF20353B" xlink:to="lab_dei_EntityRegistrantName_65794401CE9F2D0122FDC5C6FF20353B" xlink:type="arc" />
    <link:label id="lab_dei_EntityCentralIndexKey_8E28747B8F477DFB4E76C5C6FF2039C2_terseLabel_en-US" xlink:label="lab_dei_EntityCentralIndexKey_8E28747B8F477DFB4E76C5C6FF2039C2" 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_8E28747B8F477DFB4E76C5C6FF2039C2_label_en-US" xlink:label="lab_dei_EntityCentralIndexKey_8E28747B8F477DFB4E76C5C6FF2039C2" 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_8E28747B8F477DFB4E76C5C6FF2039C2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCentralIndexKey_8E28747B8F477DFB4E76C5C6FF2039C2" xlink:to="lab_dei_EntityCentralIndexKey_8E28747B8F477DFB4E76C5C6FF2039C2" xlink:type="arc" />
    <link:label id="lab_dei_CurrentFiscalYearEndDate_3F3FE21079C4E7CFE85AC5C6FF216682_terseLabel_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate_3F3FE21079C4E7CFE85AC5C6FF216682" 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_3F3FE21079C4E7CFE85AC5C6FF216682_label_en-US" xlink:label="lab_dei_CurrentFiscalYearEndDate_3F3FE21079C4E7CFE85AC5C6FF216682" 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_3F3FE21079C4E7CFE85AC5C6FF216682" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_CurrentFiscalYearEndDate_3F3FE21079C4E7CFE85AC5C6FF216682" xlink:to="lab_dei_CurrentFiscalYearEndDate_3F3FE21079C4E7CFE85AC5C6FF216682" xlink:type="arc" />
    <link:label id="lab_dei_EntityEmergingGrowthCompany_F47999170325846C7556C5C6FF219319_terseLabel_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany_F47999170325846C7556C5C6FF219319" 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_F47999170325846C7556C5C6FF219319_label_en-US" xlink:label="lab_dei_EntityEmergingGrowthCompany_F47999170325846C7556C5C6FF219319" 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_F47999170325846C7556C5C6FF219319" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityEmergingGrowthCompany_F47999170325846C7556C5C6FF219319" xlink:to="lab_dei_EntityEmergingGrowthCompany_F47999170325846C7556C5C6FF219319" xlink:type="arc" />
    <link:label id="lab_dei_EntitySmallBusiness_69F574A19679A9D6B706C5C6FF2172EF_terseLabel_en-US" xlink:label="lab_dei_EntitySmallBusiness_69F574A19679A9D6B706C5C6FF2172EF" 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_69F574A19679A9D6B706C5C6FF2172EF_label_en-US" xlink:label="lab_dei_EntitySmallBusiness_69F574A19679A9D6B706C5C6FF2172EF" 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_69F574A19679A9D6B706C5C6FF2172EF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntitySmallBusiness_69F574A19679A9D6B706C5C6FF2172EF" xlink:to="lab_dei_EntitySmallBusiness_69F574A19679A9D6B706C5C6FF2172EF" xlink:type="arc" />
    <link:label id="lab_dei_EntityCurrentReportingStatus_FD8F4DDD8F1DBB0B579CC5C6FF21E642_terseLabel_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus_FD8F4DDD8F1DBB0B579CC5C6FF21E642" 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_FD8F4DDD8F1DBB0B579CC5C6FF21E642_label_en-US" xlink:label="lab_dei_EntityCurrentReportingStatus_FD8F4DDD8F1DBB0B579CC5C6FF21E642" 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_FD8F4DDD8F1DBB0B579CC5C6FF21E642" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCurrentReportingStatus_FD8F4DDD8F1DBB0B579CC5C6FF21E642" xlink:to="lab_dei_EntityCurrentReportingStatus_FD8F4DDD8F1DBB0B579CC5C6FF21E642" xlink:type="arc" />
    <link:label id="lab_dei_EntityFilerCategory_AEF3116547A11A30D17CC5C6FF2192CA_terseLabel_en-US" xlink:label="lab_dei_EntityFilerCategory_AEF3116547A11A30D17CC5C6FF2192CA" 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_AEF3116547A11A30D17CC5C6FF2192CA_label_en-US" xlink:label="lab_dei_EntityFilerCategory_AEF3116547A11A30D17CC5C6FF2192CA" 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_AEF3116547A11A30D17CC5C6FF2192CA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityFilerCategory_AEF3116547A11A30D17CC5C6FF2192CA" xlink:to="lab_dei_EntityFilerCategory_AEF3116547A11A30D17CC5C6FF2192CA" xlink:type="arc" />
    <link:label id="lab_dei_EntityPublicFloat_2F52A6E383603152EACEC5C6FF22411A_terseLabel_en-US" xlink:label="lab_dei_EntityPublicFloat_2F52A6E383603152EACEC5C6FF22411A" 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_2F52A6E383603152EACEC5C6FF22411A_label_en-US" xlink:label="lab_dei_EntityPublicFloat_2F52A6E383603152EACEC5C6FF22411A" 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_2F52A6E383603152EACEC5C6FF22411A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityPublicFloat_2F52A6E383603152EACEC5C6FF22411A" xlink:to="lab_dei_EntityPublicFloat_2F52A6E383603152EACEC5C6FF22411A" xlink:type="arc" />
    <link:label id="lab_dei_EntityCommonStockSharesOutstanding_1865402BB0236323E758C5C6FF226562_terseLabel_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_1865402BB0236323E758C5C6FF226562" 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_1865402BB0236323E758C5C6FF226562_label_en-US" xlink:label="lab_dei_EntityCommonStockSharesOutstanding_1865402BB0236323E758C5C6FF226562" 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_1865402BB0236323E758C5C6FF226562" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityCommonStockSharesOutstanding_1865402BB0236323E758C5C6FF226562" xlink:to="lab_dei_EntityCommonStockSharesOutstanding_1865402BB0236323E758C5C6FF226562" xlink:type="arc" />
    <link:label id="lab_dei_DocumentFiscalYearFocus_E1C3AF1DD3824F40A2C4C5C6FF220DC9_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus_E1C3AF1DD3824F40A2C4C5C6FF220DC9" 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_E1C3AF1DD3824F40A2C4C5C6FF220DC9_label_en-US" xlink:label="lab_dei_DocumentFiscalYearFocus_E1C3AF1DD3824F40A2C4C5C6FF220DC9" 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_E1C3AF1DD3824F40A2C4C5C6FF220DC9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalYearFocus_E1C3AF1DD3824F40A2C4C5C6FF220DC9" xlink:to="lab_dei_DocumentFiscalYearFocus_E1C3AF1DD3824F40A2C4C5C6FF220DC9" xlink:type="arc" />
    <link:label id="lab_dei_DocumentFiscalPeriodFocus_D49347FDDB223C60F466C5C6FF227255_terseLabel_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus_D49347FDDB223C60F466C5C6FF227255" 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_D49347FDDB223C60F466C5C6FF227255_label_en-US" xlink:label="lab_dei_DocumentFiscalPeriodFocus_D49347FDDB223C60F466C5C6FF227255" 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_D49347FDDB223C60F466C5C6FF227255" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentFiscalPeriodFocus_D49347FDDB223C60F466C5C6FF227255" xlink:to="lab_dei_DocumentFiscalPeriodFocus_D49347FDDB223C60F466C5C6FF227255" xlink:type="arc" />
    <link:label id="lab_dei_DocumentType_0F8CD03896DA27E2A4C8C5C6FF224898_terseLabel_en-US" xlink:label="lab_dei_DocumentType_0F8CD03896DA27E2A4C8C5C6FF224898" 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_0F8CD03896DA27E2A4C8C5C6FF224898_label_en-US" xlink:label="lab_dei_DocumentType_0F8CD03896DA27E2A4C8C5C6FF224898" 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_0F8CD03896DA27E2A4C8C5C6FF224898" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentType_0F8CD03896DA27E2A4C8C5C6FF224898" xlink:to="lab_dei_DocumentType_0F8CD03896DA27E2A4C8C5C6FF224898" xlink:type="arc" />
    <link:label id="lab_dei_AmendmentFlag_BB51DB0F485E2BFC0325C5C6FF222CAB_terseLabel_en-US" xlink:label="lab_dei_AmendmentFlag_BB51DB0F485E2BFC0325C5C6FF222CAB" 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_BB51DB0F485E2BFC0325C5C6FF222CAB_label_en-US" xlink:label="lab_dei_AmendmentFlag_BB51DB0F485E2BFC0325C5C6FF222CAB" 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_BB51DB0F485E2BFC0325C5C6FF222CAB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_AmendmentFlag_BB51DB0F485E2BFC0325C5C6FF222CAB" xlink:to="lab_dei_AmendmentFlag_BB51DB0F485E2BFC0325C5C6FF222CAB" xlink:type="arc" />
    <link:label id="lab_dei_DocumentPeriodEndDate_C4F47AE92BDB182F373FC5C6FF2348A6_terseLabel_en-US" xlink:label="lab_dei_DocumentPeriodEndDate_C4F47AE92BDB182F373FC5C6FF2348A6" 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_C4F47AE92BDB182F373FC5C6FF2348A6_label_en-US" xlink:label="lab_dei_DocumentPeriodEndDate_C4F47AE92BDB182F373FC5C6FF2348A6" 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_C4F47AE92BDB182F373FC5C6FF2348A6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_DocumentPeriodEndDate_C4F47AE92BDB182F373FC5C6FF2348A6" xlink:to="lab_dei_DocumentPeriodEndDate_C4F47AE92BDB182F373FC5C6FF2348A6" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByBalanceSheetGroupingTable_278BD1C05A5F61D34EDAC5654ACB56E4_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_278BD1C05A5F61D34EDAC5654ACB56E4" 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_278BD1C05A5F61D34EDAC5654ACB56E4_label_en-US" xlink:label="lab_us-gaap_FairValueByBalanceSheetGroupingTable_278BD1C05A5F61D34EDAC5654ACB56E4" 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_278BD1C05A5F61D34EDAC5654ACB56E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_278BD1C05A5F61D34EDAC5654ACB56E4" xlink:to="lab_us-gaap_FairValueByBalanceSheetGroupingTable_278BD1C05A5F61D34EDAC5654ACB56E4" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueByMeasurementBasisAxis_BDA9B3987FD7A7985F44C5654ACBB56C_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis_BDA9B3987FD7A7985F44C5654ACBB56C" 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_BDA9B3987FD7A7985F44C5654ACBB56C_label_en-US" xlink:label="lab_us-gaap_FairValueByMeasurementBasisAxis_BDA9B3987FD7A7985F44C5654ACBB56C" 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_BDA9B3987FD7A7985F44C5654ACBB56C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_BDA9B3987FD7A7985F44C5654ACBB56C" xlink:to="lab_us-gaap_FairValueByMeasurementBasisAxis_BDA9B3987FD7A7985F44C5654ACBB56C" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueDisclosureItemAmountsDomain_B8D3D26F0BD3FEF14F61C5654ACBE886_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueDisclosureItemAmountsDomain_B8D3D26F0BD3FEF14F61C5654ACBE886" 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_B8D3D26F0BD3FEF14F61C5654ACBE886_label_en-US" xlink:label="lab_us-gaap_FairValueDisclosureItemAmountsDomain_B8D3D26F0BD3FEF14F61C5654ACBE886" 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_B8D3D26F0BD3FEF14F61C5654ACBE886" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_B8D3D26F0BD3FEF14F61C5654ACBE886" xlink:to="lab_us-gaap_FairValueDisclosureItemAmountsDomain_B8D3D26F0BD3FEF14F61C5654ACBE886" xlink:type="arc" />
    <link:label id="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_BA6D4923442546AEE18EC5654ACB1671_terseLabel_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_BA6D4923442546AEE18EC5654ACB1671" 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_BA6D4923442546AEE18EC5654ACB1671_label_en-US" xlink:label="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_BA6D4923442546AEE18EC5654ACB1671" 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_BA6D4923442546AEE18EC5654ACB1671" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_BA6D4923442546AEE18EC5654ACB1671" xlink:to="lab_us-gaap_PortionAtFairValueFairValueDisclosureMember_BA6D4923442546AEE18EC5654ACB1671" xlink:type="arc" />
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_F9A852EA9534AEA0DE88C5654ACBEC14_terseLabel_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_F9A852EA9534AEA0DE88C5654ACBEC14" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Carrying (Reported) Amount, Fair Value Disclosure [Member]</link:label>
    <link:label id="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_F9A852EA9534AEA0DE88C5654ACBEC14_label_en-US" xlink:label="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_F9A852EA9534AEA0DE88C5654ACBEC14" 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_F9A852EA9534AEA0DE88C5654ACBEC14" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_F9A852EA9534AEA0DE88C5654ACBEC14" xlink:to="lab_us-gaap_CarryingReportedAmountFairValueDisclosureMember_F9A852EA9534AEA0DE88C5654ACBEC14" xlink:type="arc" />
    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_F9E6749FC9AE62A7E971C5654ACB4C27_terseLabel_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_F9E6749FC9AE62A7E971C5654ACB4C27" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimate of Fair Value, Fair Value Disclosure [Member]</link:label>
    <link:label id="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_F9E6749FC9AE62A7E971C5654ACB4C27_label_en-US" xlink:label="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_F9E6749FC9AE62A7E971C5654ACB4C27" 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_F9E6749FC9AE62A7E971C5654ACB4C27" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_F9E6749FC9AE62A7E971C5654ACB4C27" xlink:to="lab_us-gaap_EstimateOfFairValueFairValueDisclosureMember_F9E6749FC9AE62A7E971C5654ACB4C27" xlink:type="arc" />
    <link:label id="lab_us-gaap_AssetBackedSecuritiesMember_D28EA7BCC76192124A62C5654ACB6E3D_terseLabel_en-US" xlink:label="lab_us-gaap_AssetBackedSecuritiesMember_D28EA7BCC76192124A62C5654ACB6E3D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Asset-backed securities</link:label>
    <link:label id="lab_us-gaap_AssetBackedSecuritiesMember_D28EA7BCC76192124A62C5654ACB6E3D_label_en-US" xlink:label="lab_us-gaap_AssetBackedSecuritiesMember_D28EA7BCC76192124A62C5654ACB6E3D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Asset-backed Securities [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_D28EA7BCC76192124A62C5654ACB6E3D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetBackedSecuritiesMember_D28EA7BCC76192124A62C5654ACB6E3D" xlink:to="lab_us-gaap_AssetBackedSecuritiesMember_D28EA7BCC76192124A62C5654ACB6E3D" xlink:type="arc" />
    <link:label id="lab_bokf_OtherTradingSecuritiesMember_DEB40F7D4347B40B1053C5654ACB2EBE_terseLabel_en-US" xlink:label="lab_bokf_OtherTradingSecuritiesMember_DEB40F7D4347B40B1053C5654ACB2EBE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other trading securities</link:label>
    <link:label id="lab_bokf_OtherTradingSecuritiesMember_DEB40F7D4347B40B1053C5654ACB2EBE_label_en-US" xlink:label="lab_bokf_OtherTradingSecuritiesMember_DEB40F7D4347B40B1053C5654ACB2EBE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Trading Securities [Member]</link:label>
    <link:label id="lab_bokf_OtherTradingSecuritiesMember_DEB40F7D4347B40B1053C5654ACB2EBE_documentation_en-US" xlink:label="lab_bokf_OtherTradingSecuritiesMember_DEB40F7D4347B40B1053C5654ACB2EBE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Other debt or equity trading securities</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_OtherTradingSecuritiesMember" xlink:label="loc_bokf_OtherTradingSecuritiesMember_DEB40F7D4347B40B1053C5654ACB2EBE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_OtherTradingSecuritiesMember_DEB40F7D4347B40B1053C5654ACB2EBE" xlink:to="lab_bokf_OtherTradingSecuritiesMember_DEB40F7D4347B40B1053C5654ACB2EBE" xlink:type="arc" />
    <link:label id="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_93CE0C34413BC112771DC5654ACB20C9_terseLabel_en-US" xlink:label="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_93CE0C34413BC112771DC5654ACB20C9" 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_93CE0C34413BC112771DC5654ACB20C9_label_en-US" xlink:label="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_93CE0C34413BC112771DC5654ACB20C9" 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_93CE0C34413BC112771DC5654ACB20C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_93CE0C34413BC112771DC5654ACB20C9" xlink:to="lab_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_93CE0C34413BC112771DC5654ACB20C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_176DABCB630F0E560C46C5654ACBBE60_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_176DABCB630F0E560C46C5654ACBBE60" 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_176DABCB630F0E560C46C5654ACBBE60_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_176DABCB630F0E560C46C5654ACBBE60" 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_176DABCB630F0E560C46C5654ACBBE60" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_176DABCB630F0E560C46C5654ACBBE60" xlink:to="lab_us-gaap_CashAndCashEquivalentsFairValueDisclosure_176DABCB630F0E560C46C5654ACBBE60" xlink:type="arc" />
    <link:label id="lab_bokf_Interestbearingcashandcashequivalents_1BEB249763727BC42A54C5654ACBEA44_terseLabel_en-US" xlink:label="lab_bokf_Interestbearingcashandcashequivalents_1BEB249763727BC42A54C5654ACBEA44" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest-bearing cash and cash equivalents</link:label>
    <link:label id="lab_bokf_Interestbearingcashandcashequivalents_1BEB249763727BC42A54C5654ACBEA44_label_en-US" xlink:label="lab_bokf_Interestbearingcashandcashequivalents_1BEB249763727BC42A54C5654ACBEA44" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest-bearing cash and cash equivalents</link:label>
    <link:label id="lab_bokf_Interestbearingcashandcashequivalents_1BEB249763727BC42A54C5654ACBEA44_documentation_en-US" xlink:label="lab_bokf_Interestbearingcashandcashequivalents_1BEB249763727BC42A54C5654ACBEA44" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents money market or interest-bearing cash accounts held in other financial institutions (including the Federal Reserve); federal funds sold to other depository institutions, securities brokers or securities dealers and securities purchased under agreements to resell.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Interestbearingcashandcashequivalents" xlink:label="loc_bokf_Interestbearingcashandcashequivalents_1BEB249763727BC42A54C5654ACBEA44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Interestbearingcashandcashequivalents_1BEB249763727BC42A54C5654ACBEA44" xlink:to="lab_bokf_Interestbearingcashandcashequivalents_1BEB249763727BC42A54C5654ACBEA44" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_9EB686C91B7C15753AE1C5654ACBAD8D_terseLabel_en-US" xlink:label="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_9EB686C91B7C15753AE1C5654ACBAD8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans, net of allowance</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_9EB686C91B7C15753AE1C5654ACBAD8D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_9EB686C91B7C15753AE1C5654ACBAD8D" xlink:to="lab_us-gaap_LoansAndLeasesReceivableNetReportedAmount_9EB686C91B7C15753AE1C5654ACBAD8D" xlink:type="arc" />
    <link:label id="lab_bokf_DepositsNoStatedMaturityFairValueDisclosure_F21B472DB3768FD6CB86C5654ACB9ACC_verboseLabel_en-US" xlink:label="lab_bokf_DepositsNoStatedMaturityFairValueDisclosure_F21B472DB3768FD6CB86C5654ACB9ACC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Deposits with no stated maturity</link:label>
    <link:label id="lab_bokf_DepositsNoStatedMaturityFairValueDisclosure_F21B472DB3768FD6CB86C5654ACB9ACC_label_en-US" xlink:label="lab_bokf_DepositsNoStatedMaturityFairValueDisclosure_F21B472DB3768FD6CB86C5654ACB9ACC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deposits No Stated Maturity Fair Value Disclosure</link:label>
    <link:label id="lab_bokf_DepositsNoStatedMaturityFairValueDisclosure_F21B472DB3768FD6CB86C5654ACB9ACC_documentation_en-US" xlink:label="lab_bokf_DepositsNoStatedMaturityFairValueDisclosure_F21B472DB3768FD6CB86C5654ACB9ACC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. May be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. May be used in both the balance sheet and disclosure in the same submission. Represents time deposits with no stated maturity as presented on the statement of financial position.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_DepositsNoStatedMaturityFairValueDisclosure" xlink:label="loc_bokf_DepositsNoStatedMaturityFairValueDisclosure_F21B472DB3768FD6CB86C5654ACB9ACC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_DepositsNoStatedMaturityFairValueDisclosure_F21B472DB3768FD6CB86C5654ACB9ACC" xlink:to="lab_bokf_DepositsNoStatedMaturityFairValueDisclosure_F21B472DB3768FD6CB86C5654ACB9ACC" xlink:type="arc" />
    <link:label id="lab_us-gaap_TimeDeposits_71C786CADB822F812C90C5654ACBF300_terseLabel_en-US" xlink:label="lab_us-gaap_TimeDeposits_71C786CADB822F812C90C5654ACBF300" xlink:role="http://www.xbrl.org/2003/role/terseLabel" 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_71C786CADB822F812C90C5654ACBF300" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TimeDeposits_71C786CADB822F812C90C5654ACBF300" xlink:to="lab_us-gaap_TimeDeposits_71C786CADB822F812C90C5654ACBF300" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_153C4EDC0AD59540A4FBC5654ACB18FB_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_153C4EDC0AD59540A4FBC5654ACB18FB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other borrowed funds</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_153C4EDC0AD59540A4FBC5654ACB18FB_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_153C4EDC0AD59540A4FBC5654ACB18FB" 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_153C4EDC0AD59540A4FBC5654ACB18FB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilitiesFairValueDisclosure_153C4EDC0AD59540A4FBC5654ACB18FB" xlink:to="lab_us-gaap_OtherLiabilitiesFairValueDisclosure_153C4EDC0AD59540A4FBC5654ACB18FB" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_EB6BDC3DBA3D0414B329D47EA884D912_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_EB6BDC3DBA3D0414B329D47EA884D912" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Reportable Segments [Text Block]</link:label>
    <link:label id="lab_us-gaap_SegmentReportingDisclosureTextBlock_EB6BDC3DBA3D0414B329D47EA884D912_label_en-US" xlink:label="lab_us-gaap_SegmentReportingDisclosureTextBlock_EB6BDC3DBA3D0414B329D47EA884D912" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting 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_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_EB6BDC3DBA3D0414B329D47EA884D912" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingDisclosureTextBlock_EB6BDC3DBA3D0414B329D47EA884D912" xlink:to="lab_us-gaap_SegmentReportingDisclosureTextBlock_EB6BDC3DBA3D0414B329D47EA884D912" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingencyAbstract_F86F01C550603F34082BD47EA845CD37_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyAbstract_F86F01C550603F34082BD47EA845CD37" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss Contingency [Abstract]</link:label>
    <link:label id="lab_us-gaap_LossContingencyAbstract_F86F01C550603F34082BD47EA845CD37_label_en-US" xlink:label="lab_us-gaap_LossContingencyAbstract_F86F01C550603F34082BD47EA845CD37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyAbstract" xlink:label="loc_us-gaap_LossContingencyAbstract_F86F01C550603F34082BD47EA845CD37" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyAbstract_F86F01C550603F34082BD47EA845CD37" xlink:to="lab_us-gaap_LossContingencyAbstract_F86F01C550603F34082BD47EA845CD37" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingenciesTable_B17871CEADAE1443F9E4D47EA845CFF7_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesTable_B17871CEADAE1443F9E4D47EA845CFF7" 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_B17871CEADAE1443F9E4D47EA845CFF7_label_en-US" xlink:label="lab_us-gaap_LossContingenciesTable_B17871CEADAE1443F9E4D47EA845CFF7" 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_B17871CEADAE1443F9E4D47EA845CFF7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingenciesTable_B17871CEADAE1443F9E4D47EA845CFF7" xlink:to="lab_us-gaap_LossContingenciesTable_B17871CEADAE1443F9E4D47EA845CFF7" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_CBB4F3DDE4C4ADC27EC7D47EA845AFF1_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_CBB4F3DDE4C4ADC27EC7D47EA845AFF1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss Contingencies by Nature of Contingency [Axis]</link:label>
    <link:label id="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_CBB4F3DDE4C4ADC27EC7D47EA845AFF1_label_en-US" xlink:label="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_CBB4F3DDE4C4ADC27EC7D47EA845AFF1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency Nature [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_CBB4F3DDE4C4ADC27EC7D47EA845AFF1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_CBB4F3DDE4C4ADC27EC7D47EA845AFF1" xlink:to="lab_us-gaap_LossContingenciesByNatureOfContingencyAxis_CBB4F3DDE4C4ADC27EC7D47EA845AFF1" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingencyNatureDomain_3ECBFC8EAC3BD1EA5F5AD47EA8458A79_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyNatureDomain_3ECBFC8EAC3BD1EA5F5AD47EA8458A79" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss Contingency, Nature [Domain]</link:label>
    <link:label id="lab_us-gaap_LossContingencyNatureDomain_3ECBFC8EAC3BD1EA5F5AD47EA8458A79_label_en-US" xlink:label="lab_us-gaap_LossContingencyNatureDomain_3ECBFC8EAC3BD1EA5F5AD47EA8458A79" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency, Nature [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="loc_us-gaap_LossContingencyNatureDomain_3ECBFC8EAC3BD1EA5F5AD47EA8458A79" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyNatureDomain_3ECBFC8EAC3BD1EA5F5AD47EA8458A79" xlink:to="lab_us-gaap_LossContingencyNatureDomain_3ECBFC8EAC3BD1EA5F5AD47EA8458A79" xlink:type="arc" />
    <link:label id="lab_bokf_VisaMembershipMember_934A8EDAB32867E308ACD47EA845548F_terseLabel_en-US" xlink:label="lab_bokf_VisaMembershipMember_934A8EDAB32867E308ACD47EA845548F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Visa Membership [Member]</link:label>
    <link:label id="lab_bokf_VisaMembershipMember_934A8EDAB32867E308ACD47EA845548F_label_en-US" xlink:label="lab_bokf_VisaMembershipMember_934A8EDAB32867E308ACD47EA845548F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Visa Membership [Member]</link:label>
    <link:label id="lab_bokf_VisaMembershipMember_934A8EDAB32867E308ACD47EA845548F_documentation_en-US" xlink:label="lab_bokf_VisaMembershipMember_934A8EDAB32867E308ACD47EA845548F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Banks membership in the Visa network and it proportionate share of covered liabilities and benefits.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_VisaMembershipMember" xlink:label="loc_bokf_VisaMembershipMember_934A8EDAB32867E308ACD47EA845548F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_VisaMembershipMember_934A8EDAB32867E308ACD47EA845548F" xlink:to="lab_bokf_VisaMembershipMember_934A8EDAB32867E308ACD47EA845548F" xlink:type="arc" />
    <link:label id="lab_us-gaap_LitigationStatusAxis_363F08EB316A58FF00EBD47EA845422B_terseLabel_en-US" xlink:label="lab_us-gaap_LitigationStatusAxis_363F08EB316A58FF00EBD47EA845422B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Litigation Status [Axis]</link:label>
    <link:label id="lab_us-gaap_LitigationStatusAxis_363F08EB316A58FF00EBD47EA845422B_label_en-US" xlink:label="lab_us-gaap_LitigationStatusAxis_363F08EB316A58FF00EBD47EA845422B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Litigation Status [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LitigationStatusAxis" xlink:label="loc_us-gaap_LitigationStatusAxis_363F08EB316A58FF00EBD47EA845422B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LitigationStatusAxis_363F08EB316A58FF00EBD47EA845422B" xlink:to="lab_us-gaap_LitigationStatusAxis_363F08EB316A58FF00EBD47EA845422B" xlink:type="arc" />
    <link:label id="lab_us-gaap_LitigationStatusDomain_8E2752B75111470F4347D47EA8452900_terseLabel_en-US" xlink:label="lab_us-gaap_LitigationStatusDomain_8E2752B75111470F4347D47EA8452900" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Litigation Status [Domain]</link:label>
    <link:label id="lab_us-gaap_LitigationStatusDomain_8E2752B75111470F4347D47EA8452900_label_en-US" xlink:label="lab_us-gaap_LitigationStatusDomain_8E2752B75111470F4347D47EA8452900" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Litigation Status [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LitigationStatusDomain" xlink:label="loc_us-gaap_LitigationStatusDomain_8E2752B75111470F4347D47EA8452900" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LitigationStatusDomain_8E2752B75111470F4347D47EA8452900" xlink:to="lab_us-gaap_LitigationStatusDomain_8E2752B75111470F4347D47EA8452900" xlink:type="arc" />
    <link:label id="lab_us-gaap_JudicialRulingMember_9A5EB530F3FF8EF0D34AD47EA845F65F_terseLabel_en-US" xlink:label="lab_us-gaap_JudicialRulingMember_9A5EB530F3FF8EF0D34AD47EA845F65F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Judicial Ruling [Member]</link:label>
    <link:label id="lab_us-gaap_JudicialRulingMember_9A5EB530F3FF8EF0D34AD47EA845F65F_label_en-US" xlink:label="lab_us-gaap_JudicialRulingMember_9A5EB530F3FF8EF0D34AD47EA845F65F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Judicial Ruling [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_JudicialRulingMember" xlink:label="loc_us-gaap_JudicialRulingMember_9A5EB530F3FF8EF0D34AD47EA845F65F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_JudicialRulingMember_9A5EB530F3FF8EF0D34AD47EA845F65F" xlink:to="lab_us-gaap_JudicialRulingMember_9A5EB530F3FF8EF0D34AD47EA845F65F" xlink:type="arc" />
    <link:label id="lab_us-gaap_PendingLitigationMember_9B38BD4E5433BFC7ACA4D47EA8450F79_terseLabel_en-US" xlink:label="lab_us-gaap_PendingLitigationMember_9B38BD4E5433BFC7ACA4D47EA8450F79" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pending Litigation [Member]</link:label>
    <link:label id="lab_us-gaap_PendingLitigationMember_9B38BD4E5433BFC7ACA4D47EA8450F79_label_en-US" xlink:label="lab_us-gaap_PendingLitigationMember_9B38BD4E5433BFC7ACA4D47EA8450F79" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Pending Litigation [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PendingLitigationMember" xlink:label="loc_us-gaap_PendingLitigationMember_9B38BD4E5433BFC7ACA4D47EA8450F79" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PendingLitigationMember_9B38BD4E5433BFC7ACA4D47EA8450F79" xlink:to="lab_us-gaap_PendingLitigationMember_9B38BD4E5433BFC7ACA4D47EA8450F79" xlink:type="arc" />
    <link:label id="lab_srt_LitigationCaseAxis_5668D451F248B9132A20D47EA8450AEA_terseLabel_en-US" xlink:label="lab_srt_LitigationCaseAxis_5668D451F248B9132A20D47EA8450AEA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Litigation Case [Axis]</link:label>
    <link:label id="lab_srt_LitigationCaseAxis_5668D451F248B9132A20D47EA8450AEA_label_en-US" xlink:label="lab_srt_LitigationCaseAxis_5668D451F248B9132A20D47EA8450AEA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Litigation Case [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_LitigationCaseAxis" xlink:label="loc_srt_LitigationCaseAxis_5668D451F248B9132A20D47EA8450AEA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_LitigationCaseAxis_5668D451F248B9132A20D47EA8450AEA" xlink:to="lab_srt_LitigationCaseAxis_5668D451F248B9132A20D47EA8450AEA" xlink:type="arc" />
    <link:label id="lab_srt_LitigationCaseTypeDomain_61ADFC55EE318A38CE33D47EA8453455_terseLabel_en-US" xlink:label="lab_srt_LitigationCaseTypeDomain_61ADFC55EE318A38CE33D47EA8453455" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Litigation Case [Domain]</link:label>
    <link:label id="lab_srt_LitigationCaseTypeDomain_61ADFC55EE318A38CE33D47EA8453455_label_en-US" xlink:label="lab_srt_LitigationCaseTypeDomain_61ADFC55EE318A38CE33D47EA8453455" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Litigation Case [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_LitigationCaseTypeDomain" xlink:label="loc_srt_LitigationCaseTypeDomain_61ADFC55EE318A38CE33D47EA8453455" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_LitigationCaseTypeDomain_61ADFC55EE318A38CE33D47EA8453455" xlink:to="lab_srt_LitigationCaseTypeDomain_61ADFC55EE318A38CE33D47EA8453455" xlink:type="arc" />
    <link:label id="lab_bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember_3EBFA02150CA26246171D47EA8456FA9_terseLabel_en-US" xlink:label="lab_bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember_3EBFA02150CA26246171D47EA8456FA9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Misuse of Revenues Pledged to Municipal Bonds [Member]</link:label>
    <link:label id="lab_bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember_3EBFA02150CA26246171D47EA8456FA9_label_en-US" xlink:label="lab_bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember_3EBFA02150CA26246171D47EA8456FA9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Misuse of Revenues Pledged to Municipal Bonds [Member]</link:label>
    <link:label id="lab_bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember_3EBFA02150CA26246171D47EA8456FA9_documentation_en-US" xlink:label="lab_bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember_3EBFA02150CA26246171D47EA8456FA9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Misuse of Revenues Pledged to Municipal Bonds [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember" xlink:label="loc_bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember_3EBFA02150CA26246171D47EA8456FA9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember_3EBFA02150CA26246171D47EA8456FA9" xlink:to="lab_bokf_MisuseofRevenuesPledgedtoMunicipalBondsMember_3EBFA02150CA26246171D47EA8456FA9" xlink:type="arc" />
    <link:label id="lab_bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember_DCF4EE7849697E4715ACD47EA8458BE4_terseLabel_en-US" xlink:label="lab_bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember_DCF4EE7849697E4715ACD47EA8458BE4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bank Participation in Fraudulent Sale of Securities by Principals [Member]</link:label>
    <link:label id="lab_bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember_DCF4EE7849697E4715ACD47EA8458BE4_label_en-US" xlink:label="lab_bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember_DCF4EE7849697E4715ACD47EA8458BE4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Bank Participation in Fraudulent Sale of Securities by Principals [Member]</link:label>
    <link:label id="lab_bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember_DCF4EE7849697E4715ACD47EA8458BE4_documentation_en-US" xlink:label="lab_bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember_DCF4EE7849697E4715ACD47EA8458BE4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Bank Participation in Fraudulent Sale of Securities by Principals [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember" xlink:label="loc_bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember_DCF4EE7849697E4715ACD47EA8458BE4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember_DCF4EE7849697E4715ACD47EA8458BE4" xlink:to="lab_bokf_BankParticipationinFraudulentSaleofSecuritiesbyPrincipalsMember_DCF4EE7849697E4715ACD47EA8458BE4" xlink:type="arc" />
    <link:label id="lab_bokf_PurchaseoffacilitiesfromprincipalssubjecttoSECNewJerseyproceedingsMember_1EE1F7A46B8D6F8B6631D47EA84577E8_terseLabel_en-US" xlink:label="lab_bokf_PurchaseoffacilitiesfromprincipalssubjecttoSECNewJerseyproceedingsMember_1EE1F7A46B8D6F8B6631D47EA84577E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchase of facilities from principals subject to SEC New Jersey proceedings [Member]</link:label>
    <link:label id="lab_bokf_PurchaseoffacilitiesfromprincipalssubjecttoSECNewJerseyproceedingsMember_1EE1F7A46B8D6F8B6631D47EA84577E8_label_en-US" xlink:label="lab_bokf_PurchaseoffacilitiesfromprincipalssubjecttoSECNewJerseyproceedingsMember_1EE1F7A46B8D6F8B6631D47EA84577E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Purchase of facilities from principals subject to SEC New Jersey proceedings [Member]</link:label>
    <link:label id="lab_bokf_PurchaseoffacilitiesfromprincipalssubjecttoSECNewJerseyproceedingsMember_1EE1F7A46B8D6F8B6631D47EA84577E8_documentation_en-US" xlink:label="lab_bokf_PurchaseoffacilitiesfromprincipalssubjecttoSECNewJerseyproceedingsMember_1EE1F7A46B8D6F8B6631D47EA84577E8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Purchase of facilities from principals subject to SEC New Jersey proceedings [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_PurchaseoffacilitiesfromprincipalssubjecttoSECNewJerseyproceedingsMember" xlink:label="loc_bokf_PurchaseoffacilitiesfromprincipalssubjecttoSECNewJerseyproceedingsMember_1EE1F7A46B8D6F8B6631D47EA84577E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_PurchaseoffacilitiesfromprincipalssubjecttoSECNewJerseyproceedingsMember_1EE1F7A46B8D6F8B6631D47EA84577E8" xlink:to="lab_bokf_PurchaseoffacilitiesfromprincipalssubjecttoSECNewJerseyproceedingsMember_1EE1F7A46B8D6F8B6631D47EA84577E8" xlink:type="arc" />
    <link:label id="lab_dei_LegalEntityAxis_7ADD87F0B7DA7B19CF36D47EA845529C_terseLabel_en-US" xlink:label="lab_dei_LegalEntityAxis_7ADD87F0B7DA7B19CF36D47EA845529C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Legal Entity [Axis]</link:label>
    <link:label id="lab_dei_LegalEntityAxis_7ADD87F0B7DA7B19CF36D47EA845529C_label_en-US" xlink:label="lab_dei_LegalEntityAxis_7ADD87F0B7DA7B19CF36D47EA845529C" 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_7ADD87F0B7DA7B19CF36D47EA845529C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_LegalEntityAxis_7ADD87F0B7DA7B19CF36D47EA845529C" xlink:to="lab_dei_LegalEntityAxis_7ADD87F0B7DA7B19CF36D47EA845529C" xlink:type="arc" />
    <link:label id="lab_dei_EntityDomain_6099D337C7C9A12787B0D47EA8455537_terseLabel_en-US" xlink:label="lab_dei_EntityDomain_6099D337C7C9A12787B0D47EA8455537" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Entity [Domain]</link:label>
    <link:label id="lab_dei_EntityDomain_6099D337C7C9A12787B0D47EA8455537_label_en-US" xlink:label="lab_dei_EntityDomain_6099D337C7C9A12787B0D47EA8455537" 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_6099D337C7C9A12787B0D47EA8455537" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_dei_EntityDomain_6099D337C7C9A12787B0D47EA8455537" xlink:to="lab_dei_EntityDomain_6099D337C7C9A12787B0D47EA8455537" xlink:type="arc" />
    <link:label id="lab_bokf_BokfEquityLlcMember_F6599A06D03288213983D47EA845693C_terseLabel_en-US" xlink:label="lab_bokf_BokfEquityLlcMember_F6599A06D03288213983D47EA845693C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">BOKF Equity, LLC [Member]</link:label>
    <link:label id="lab_bokf_BokfEquityLlcMember_F6599A06D03288213983D47EA845693C_label_en-US" xlink:label="lab_bokf_BokfEquityLlcMember_F6599A06D03288213983D47EA845693C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">BOKF Equity, LLC [Member]</link:label>
    <link:label id="lab_bokf_BokfEquityLlcMember_F6599A06D03288213983D47EA845693C_documentation_en-US" xlink:label="lab_bokf_BokfEquityLlcMember_F6599A06D03288213983D47EA845693C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">An indirect, wholly owned subsidiary of the entity that is the general partner of consolidated private equity funds.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_BokfEquityLlcMember" xlink:label="loc_bokf_BokfEquityLlcMember_F6599A06D03288213983D47EA845693C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_BokfEquityLlcMember_F6599A06D03288213983D47EA845693C" xlink:to="lab_bokf_BokfEquityLlcMember_F6599A06D03288213983D47EA845693C" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingenciesLineItems_EF13527FA79D141B323CD47EA84520DE_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingenciesLineItems_EF13527FA79D141B323CD47EA84520DE" 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_EF13527FA79D141B323CD47EA84520DE_label_en-US" xlink:label="lab_us-gaap_LossContingenciesLineItems_EF13527FA79D141B323CD47EA84520DE" 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_EF13527FA79D141B323CD47EA84520DE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingenciesLineItems_EF13527FA79D141B323CD47EA84520DE" xlink:to="lab_us-gaap_LossContingenciesLineItems_EF13527FA79D141B323CD47EA84520DE" xlink:type="arc" />
    <link:label id="lab_bokf_CommonStockClassBSharesOwned_37A4135266C6489EB16ED47EA845A780_verboseLabel_en-US" xlink:label="lab_bokf_CommonStockClassBSharesOwned_37A4135266C6489EB16ED47EA845A780" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Number of Visa Class B Shares Owned by Entity (in shares)</link:label>
    <link:label id="lab_bokf_CommonStockClassBSharesOwned_37A4135266C6489EB16ED47EA845A780_label_en-US" xlink:label="lab_bokf_CommonStockClassBSharesOwned_37A4135266C6489EB16ED47EA845A780" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock Class B Shares Owned</link:label>
    <link:label id="lab_bokf_CommonStockClassBSharesOwned_37A4135266C6489EB16ED47EA845A780_documentation_en-US" xlink:label="lab_bokf_CommonStockClassBSharesOwned_37A4135266C6489EB16ED47EA845A780" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of common stock class B owned by the entity</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_CommonStockClassBSharesOwned" xlink:label="loc_bokf_CommonStockClassBSharesOwned_37A4135266C6489EB16ED47EA845A780" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_CommonStockClassBSharesOwned_37A4135266C6489EB16ED47EA845A780" xlink:to="lab_bokf_CommonStockClassBSharesOwned_37A4135266C6489EB16ED47EA845A780" xlink:type="arc" />
    <link:label id="lab_bokf_NumberofVisaClassASharesVisaClassBSharesAreConvertibleTo_F6269F34F5149CB5C1BED47EA845F521_terseLabel_en-US" xlink:label="lab_bokf_NumberofVisaClassASharesVisaClassBSharesAreConvertibleTo_F6269F34F5149CB5C1BED47EA845F521" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of Visa Class A Shares Visa Class B Shares Are Convertible To (in shares)</link:label>
    <link:label id="lab_bokf_NumberofVisaClassASharesVisaClassBSharesAreConvertibleTo_F6269F34F5149CB5C1BED47EA845F521_label_en-US" xlink:label="lab_bokf_NumberofVisaClassASharesVisaClassBSharesAreConvertibleTo_F6269F34F5149CB5C1BED47EA845F521" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Visa Class A Shares Visa Class B Shares Are Convertible To</link:label>
    <link:label id="lab_bokf_NumberofVisaClassASharesVisaClassBSharesAreConvertibleTo_F6269F34F5149CB5C1BED47EA845F521_documentation_en-US" xlink:label="lab_bokf_NumberofVisaClassASharesVisaClassBSharesAreConvertibleTo_F6269F34F5149CB5C1BED47EA845F521" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the number of Visa Class A shares that Visa Class B shares held by the Company are convertible to.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NumberofVisaClassASharesVisaClassBSharesAreConvertibleTo" xlink:label="loc_bokf_NumberofVisaClassASharesVisaClassBSharesAreConvertibleTo_F6269F34F5149CB5C1BED47EA845F521" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NumberofVisaClassASharesVisaClassBSharesAreConvertibleTo_F6269F34F5149CB5C1BED47EA845F521" xlink:to="lab_bokf_NumberofVisaClassASharesVisaClassBSharesAreConvertibleTo_F6269F34F5149CB5C1BED47EA845F521" xlink:type="arc" />
    <link:label id="lab_us-gaap_GainLossRelatedToLitigationSettlementAbstract_F26284DD6EE32FF9DAB3D47EA8450AD1_label_en-US" xlink:label="lab_us-gaap_GainLossRelatedToLitigationSettlementAbstract_F26284DD6EE32FF9DAB3D47EA8450AD1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Litigation Settlement [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GainLossRelatedToLitigationSettlementAbstract" xlink:label="loc_us-gaap_GainLossRelatedToLitigationSettlementAbstract_F26284DD6EE32FF9DAB3D47EA8450AD1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossRelatedToLitigationSettlementAbstract_F26284DD6EE32FF9DAB3D47EA8450AD1" xlink:to="lab_us-gaap_GainLossRelatedToLitigationSettlementAbstract_F26284DD6EE32FF9DAB3D47EA8450AD1" xlink:type="arc" />
    <link:label id="lab_bokf_Outstandingprincipalaccruedinterestandotheramountsrequiredbybonddocuments_C67CF8372095412E06B0D47EA8451772_terseLabel_en-US" xlink:label="lab_bokf_Outstandingprincipalaccruedinterestandotheramountsrequiredbybonddocuments_C67CF8372095412E06B0D47EA8451772" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding principal, accrued interest and other amounts required by bond documents</link:label>
    <link:label id="lab_bokf_Outstandingprincipalaccruedinterestandotheramountsrequiredbybonddocuments_C67CF8372095412E06B0D47EA8451772_label_en-US" xlink:label="lab_bokf_Outstandingprincipalaccruedinterestandotheramountsrequiredbybonddocuments_C67CF8372095412E06B0D47EA8451772" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outstanding principal, accrued interest and other amounts required by bond documents</link:label>
    <link:label id="lab_bokf_Outstandingprincipalaccruedinterestandotheramountsrequiredbybonddocuments_C67CF8372095412E06B0D47EA8451772_documentation_en-US" xlink:label="lab_bokf_Outstandingprincipalaccruedinterestandotheramountsrequiredbybonddocuments_C67CF8372095412E06B0D47EA8451772" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Outstanding principal, accrued interest and other amounts required by bond documents</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Outstandingprincipalaccruedinterestandotheramountsrequiredbybonddocuments" xlink:label="loc_bokf_Outstandingprincipalaccruedinterestandotheramountsrequiredbybonddocuments_C67CF8372095412E06B0D47EA8451772" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Outstandingprincipalaccruedinterestandotheramountsrequiredbybonddocuments_C67CF8372095412E06B0D47EA8451772" xlink:to="lab_bokf_Outstandingprincipalaccruedinterestandotheramountsrequiredbybonddocuments_C67CF8372095412E06B0D47EA8451772" xlink:type="arc" />
    <link:label id="lab_bokf_Disgorgedfees_1BAB9C5F6B01621B6D55D47EA8451966_terseLabel_en-US" xlink:label="lab_bokf_Disgorgedfees_1BAB9C5F6B01621B6D55D47EA8451966" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disgorged fees</link:label>
    <link:label id="lab_bokf_Disgorgedfees_1BAB9C5F6B01621B6D55D47EA8451966_label_en-US" xlink:label="lab_bokf_Disgorgedfees_1BAB9C5F6B01621B6D55D47EA8451966" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Disgorged fees</link:label>
    <link:label id="lab_bokf_Disgorgedfees_1BAB9C5F6B01621B6D55D47EA8451966_documentation_en-US" xlink:label="lab_bokf_Disgorgedfees_1BAB9C5F6B01621B6D55D47EA8451966" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents fees disgorged as a result of a settlement with a regulatory agency.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Disgorgedfees" xlink:label="loc_bokf_Disgorgedfees_1BAB9C5F6B01621B6D55D47EA8451966" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Disgorgedfees_1BAB9C5F6B01621B6D55D47EA8451966" xlink:to="lab_bokf_Disgorgedfees_1BAB9C5F6B01621B6D55D47EA8451966" xlink:type="arc" />
    <link:label id="lab_us-gaap_LitigationSettlementAmountAwardedToOtherParty_076F71BDFF4099BCDE6ED47EA8456CC0_terseLabel_en-US" xlink:label="lab_us-gaap_LitigationSettlementAmountAwardedToOtherParty_076F71BDFF4099BCDE6ED47EA8456CC0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Litigation Settlement, Amount Awarded to Other Party</link:label>
    <link:label id="lab_us-gaap_LitigationSettlementAmountAwardedToOtherParty_076F71BDFF4099BCDE6ED47EA8456CC0_label_en-US" xlink:label="lab_us-gaap_LitigationSettlementAmountAwardedToOtherParty_076F71BDFF4099BCDE6ED47EA8456CC0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Litigation Settlement, Amount Awarded to Other Party</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_076F71BDFF4099BCDE6ED47EA8456CC0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_076F71BDFF4099BCDE6ED47EA8456CC0" xlink:to="lab_us-gaap_LitigationSettlementAmountAwardedToOtherParty_076F71BDFF4099BCDE6ED47EA8456CC0" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingencyNumberOfPlaintiffs_2BDE8387638C0A72A920D47EA8456841_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyNumberOfPlaintiffs_2BDE8387638C0A72A920D47EA8456841" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss Contingency, Number of Plaintiffs</link:label>
    <link:label id="lab_us-gaap_LossContingencyNumberOfPlaintiffs_2BDE8387638C0A72A920D47EA8456841_label_en-US" xlink:label="lab_us-gaap_LossContingencyNumberOfPlaintiffs_2BDE8387638C0A72A920D47EA8456841" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency, Number of Plaintiffs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyNumberOfPlaintiffs" xlink:label="loc_us-gaap_LossContingencyNumberOfPlaintiffs_2BDE8387638C0A72A920D47EA8456841" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyNumberOfPlaintiffs_2BDE8387638C0A72A920D47EA8456841" xlink:to="lab_us-gaap_LossContingencyNumberOfPlaintiffs_2BDE8387638C0A72A920D47EA8456841" xlink:type="arc" />
    <link:label id="lab_bokf_Allegedtotalofjudgmentagainstnursinghomeoperator_4AFA68A141DF95F0E4DBD47EA845B772_terseLabel_en-US" xlink:label="lab_bokf_Allegedtotalofjudgmentagainstnursinghomeoperator_4AFA68A141DF95F0E4DBD47EA845B772" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alleged total of judgment against nursing home operator</link:label>
    <link:label id="lab_bokf_Allegedtotalofjudgmentagainstnursinghomeoperator_4AFA68A141DF95F0E4DBD47EA845B772_label_en-US" xlink:label="lab_bokf_Allegedtotalofjudgmentagainstnursinghomeoperator_4AFA68A141DF95F0E4DBD47EA845B772" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alleged total of judgment against nursing home operator</link:label>
    <link:label id="lab_bokf_Allegedtotalofjudgmentagainstnursinghomeoperator_4AFA68A141DF95F0E4DBD47EA845B772_documentation_en-US" xlink:label="lab_bokf_Allegedtotalofjudgmentagainstnursinghomeoperator_4AFA68A141DF95F0E4DBD47EA845B772" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Alleged total of judgment against nursing home operator</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Allegedtotalofjudgmentagainstnursinghomeoperator" xlink:label="loc_bokf_Allegedtotalofjudgmentagainstnursinghomeoperator_4AFA68A141DF95F0E4DBD47EA845B772" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Allegedtotalofjudgmentagainstnursinghomeoperator_4AFA68A141DF95F0E4DBD47EA845B772" xlink:to="lab_bokf_Allegedtotalofjudgmentagainstnursinghomeoperator_4AFA68A141DF95F0E4DBD47EA845B772" xlink:type="arc" />
    <link:label id="lab_bokf_NumberofindividualswhopurchasedfacilitiesfromtheprincipalssubjecttoSECNewJerseyproceedings_37411EC15698469570F6D47EA845F176_terseLabel_en-US" xlink:label="lab_bokf_NumberofindividualswhopurchasedfacilitiesfromtheprincipalssubjecttoSECNewJerseyproceedings_37411EC15698469570F6D47EA845F176" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of individuals who purchased facilities from the principals subject to SEC New Jersey proceedings</link:label>
    <link:label id="lab_bokf_NumberofindividualswhopurchasedfacilitiesfromtheprincipalssubjecttoSECNewJerseyproceedings_37411EC15698469570F6D47EA845F176_label_en-US" xlink:label="lab_bokf_NumberofindividualswhopurchasedfacilitiesfromtheprincipalssubjecttoSECNewJerseyproceedings_37411EC15698469570F6D47EA845F176" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of individuals who purchased facilities from the principals subject to SEC New Jersey proceedings</link:label>
    <link:label id="lab_bokf_NumberofindividualswhopurchasedfacilitiesfromtheprincipalssubjecttoSECNewJerseyproceedings_37411EC15698469570F6D47EA845F176_documentation_en-US" xlink:label="lab_bokf_NumberofindividualswhopurchasedfacilitiesfromtheprincipalssubjecttoSECNewJerseyproceedings_37411EC15698469570F6D47EA845F176" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of individuals who purchased facilities from the principals subject to SEC New Jersey proceedings</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NumberofindividualswhopurchasedfacilitiesfromtheprincipalssubjecttoSECNewJerseyproceedings" xlink:label="loc_bokf_NumberofindividualswhopurchasedfacilitiesfromtheprincipalssubjecttoSECNewJerseyproceedings_37411EC15698469570F6D47EA845F176" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NumberofindividualswhopurchasedfacilitiesfromtheprincipalssubjecttoSECNewJerseyproceedings_37411EC15698469570F6D47EA845F176" xlink:to="lab_bokf_NumberofindividualswhopurchasedfacilitiesfromtheprincipalssubjecttoSECNewJerseyproceedings_37411EC15698469570F6D47EA845F176" xlink:type="arc" />
    <link:label id="lab_bokf_NumberofprincipalsinSECNewJerseyproceedings_C8F26BBFBADC440D9DC8D47EA8455A41_terseLabel_en-US" xlink:label="lab_bokf_NumberofprincipalsinSECNewJerseyproceedings_C8F26BBFBADC440D9DC8D47EA8455A41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of principals in SEC New Jersey proceedings</link:label>
    <link:label id="lab_bokf_NumberofprincipalsinSECNewJerseyproceedings_C8F26BBFBADC440D9DC8D47EA8455A41_label_en-US" xlink:label="lab_bokf_NumberofprincipalsinSECNewJerseyproceedings_C8F26BBFBADC440D9DC8D47EA8455A41" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of principals in SEC New Jersey proceedings</link:label>
    <link:label id="lab_bokf_NumberofprincipalsinSECNewJerseyproceedings_C8F26BBFBADC440D9DC8D47EA8455A41_documentation_en-US" xlink:label="lab_bokf_NumberofprincipalsinSECNewJerseyproceedings_C8F26BBFBADC440D9DC8D47EA8455A41" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of principals in SEC New Jersey proceedings</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NumberofprincipalsinSECNewJerseyproceedings" xlink:label="loc_bokf_NumberofprincipalsinSECNewJerseyproceedings_C8F26BBFBADC440D9DC8D47EA8455A41" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NumberofprincipalsinSECNewJerseyproceedings_C8F26BBFBADC440D9DC8D47EA8455A41" xlink:to="lab_bokf_NumberofprincipalsinSECNewJerseyproceedings_C8F26BBFBADC440D9DC8D47EA8455A41" xlink:type="arc" />
    <link:label id="lab_bokf_NumberOfPrivateEquityFundsOfWhichEntityIsGeneralPartner_51E1805B8DDA50919434D47EA845904F_terseLabel_en-US" xlink:label="lab_bokf_NumberOfPrivateEquityFundsOfWhichEntityIsGeneralPartner_51E1805B8DDA50919434D47EA845904F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of Private Equity Funds of which the Entity is a General Partner</link:label>
    <link:label id="lab_bokf_NumberOfPrivateEquityFundsOfWhichEntityIsGeneralPartner_51E1805B8DDA50919434D47EA845904F_label_en-US" xlink:label="lab_bokf_NumberOfPrivateEquityFundsOfWhichEntityIsGeneralPartner_51E1805B8DDA50919434D47EA845904F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Private Equity Funds of which the Entity is a General Partner</link:label>
    <link:label id="lab_bokf_NumberOfPrivateEquityFundsOfWhichEntityIsGeneralPartner_51E1805B8DDA50919434D47EA845904F_documentation_en-US" xlink:label="lab_bokf_NumberOfPrivateEquityFundsOfWhichEntityIsGeneralPartner_51E1805B8DDA50919434D47EA845904F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The number of consolidated private equity mutual funds that The Entity is a general partner of.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_NumberOfPrivateEquityFundsOfWhichEntityIsGeneralPartner" xlink:label="loc_bokf_NumberOfPrivateEquityFundsOfWhichEntityIsGeneralPartner_51E1805B8DDA50919434D47EA845904F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_NumberOfPrivateEquityFundsOfWhichEntityIsGeneralPartner_51E1805B8DDA50919434D47EA845904F" xlink:to="lab_bokf_NumberOfPrivateEquityFundsOfWhichEntityIsGeneralPartner_51E1805B8DDA50919434D47EA845904F" xlink:type="arc" />
    <link:label id="lab_bokf_ContingentObligationForAdditionalInvestmentsInPrivateEquityFunds_E5B6EC5991C8A5B4CBFBD47EA845D38F_verboseLabel_en-US" xlink:label="lab_bokf_ContingentObligationForAdditionalInvestmentsInPrivateEquityFunds_E5B6EC5991C8A5B4CBFBD47EA845D38F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Contingent Obligations For Additional Investments in Private Equity Funds</link:label>
    <link:label id="lab_bokf_ContingentObligationForAdditionalInvestmentsInPrivateEquityFunds_E5B6EC5991C8A5B4CBFBD47EA845D38F_label_en-US" xlink:label="lab_bokf_ContingentObligationForAdditionalInvestmentsInPrivateEquityFunds_E5B6EC5991C8A5B4CBFBD47EA845D38F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contingent Obligation For Additional Investments In Private Equity Funds</link:label>
    <link:label id="lab_bokf_ContingentObligationForAdditionalInvestmentsInPrivateEquityFunds_E5B6EC5991C8A5B4CBFBD47EA845D38F_documentation_en-US" xlink:label="lab_bokf_ContingentObligationForAdditionalInvestmentsInPrivateEquityFunds_E5B6EC5991C8A5B4CBFBD47EA845D38F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Contingent obligation to make additional investments if limited partners are unable to perform.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ContingentObligationForAdditionalInvestmentsInPrivateEquityFunds" xlink:label="loc_bokf_ContingentObligationForAdditionalInvestmentsInPrivateEquityFunds_E5B6EC5991C8A5B4CBFBD47EA845D38F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ContingentObligationForAdditionalInvestmentsInPrivateEquityFunds_E5B6EC5991C8A5B4CBFBD47EA845D38F" xlink:to="lab_bokf_ContingentObligationForAdditionalInvestmentsInPrivateEquityFunds_E5B6EC5991C8A5B4CBFBD47EA845D38F" xlink:type="arc" />
    <link:label id="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersTable_E1F436854B202D862F19D47EA8721AD7_terseLabel_en-US" xlink:label="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersTable_E1F436854B202D862F19D47EA8721AD7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Aging of Mortgage Loans Serviced For Others [Table]</link:label>
    <link:label id="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersTable_E1F436854B202D862F19D47EA8721AD7_label_en-US" xlink:label="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersTable_E1F436854B202D862F19D47EA8721AD7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Aging of Mortgage Loans Serviced For Others [Table]</link:label>
    <link:label id="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersTable_E1F436854B202D862F19D47EA8721AD7_documentation_en-US" xlink:label="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersTable_E1F436854B202D862F19D47EA8721AD7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersTable" xlink:label="loc_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersTable_E1F436854B202D862F19D47EA8721AD7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersTable_E1F436854B202D862F19D47EA8721AD7" xlink:to="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersTable_E1F436854B202D862F19D47EA8721AD7" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_6D4D62DB4FE0142EDF82D47EA872D616_terseLabel_en-US" xlink:label="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_6D4D62DB4FE0142EDF82D47EA872D616" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Insured or Guaranteed by Government Authorities [Axis]</link:label>
    <link:label id="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_6D4D62DB4FE0142EDF82D47EA872D616_label_en-US" xlink:label="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_6D4D62DB4FE0142EDF82D47EA872D616" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Insured or Guaranteed by Government Authorities [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_6D4D62DB4FE0142EDF82D47EA872D616" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_6D4D62DB4FE0142EDF82D47EA872D616" xlink:to="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis_6D4D62DB4FE0142EDF82D47EA872D616" xlink:type="arc" />
    <link:label id="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_4605F969CC5ECBE6D80AD47EA8722A77_terseLabel_en-US" xlink:label="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_4605F969CC5ECBE6D80AD47EA8722A77" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loans Insured or Guaranteed by Government Authorities [Domain]</link:label>
    <link:label id="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_4605F969CC5ECBE6D80AD47EA8722A77_label_en-US" xlink:label="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_4605F969CC5ECBE6D80AD47EA8722A77" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Insured or Guaranteed by Government Authorities [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain" xlink:label="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_4605F969CC5ECBE6D80AD47EA8722A77" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_4605F969CC5ECBE6D80AD47EA8722A77" xlink:to="lab_us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesDomain_4605F969CC5ECBE6D80AD47EA8722A77" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember_4DF007B093C6C2757B3CD47EA873D0D9_terseLabel_en-US" xlink:label="lab_us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember_4DF007B093C6C2757B3CD47EA873D0D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FHLMC [Member]</link:label>
    <link:label id="lab_us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember_4DF007B093C6C2757B3CD47EA873D0D9_label_en-US" xlink:label="lab_us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember_4DF007B093C6C2757B3CD47EA873D0D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal Home Loan Mortgage Corporation (FHLMC) Insured Loans [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember" xlink:label="loc_us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember_4DF007B093C6C2757B3CD47EA873D0D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember_4DF007B093C6C2757B3CD47EA873D0D9" xlink:to="lab_us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember_4DF007B093C6C2757B3CD47EA873D0D9" xlink:type="arc" />
    <link:label id="lab_us-gaap_FederalNationalMortgageAssociationFnmaInsuredLoansMember_BA996B4B159192FEABFBD47EA8736589_terseLabel_en-US" xlink:label="lab_us-gaap_FederalNationalMortgageAssociationFnmaInsuredLoansMember_BA996B4B159192FEABFBD47EA8736589" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FNMA [Member]</link:label>
    <link:label id="lab_us-gaap_FederalNationalMortgageAssociationFnmaInsuredLoansMember_BA996B4B159192FEABFBD47EA8736589_label_en-US" xlink:label="lab_us-gaap_FederalNationalMortgageAssociationFnmaInsuredLoansMember_BA996B4B159192FEABFBD47EA8736589" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Federal National Mortgage Association (FNMA) Insured Loans [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FederalNationalMortgageAssociationFnmaInsuredLoansMember" xlink:label="loc_us-gaap_FederalNationalMortgageAssociationFnmaInsuredLoansMember_BA996B4B159192FEABFBD47EA8736589" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FederalNationalMortgageAssociationFnmaInsuredLoansMember_BA996B4B159192FEABFBD47EA8736589" xlink:to="lab_us-gaap_FederalNationalMortgageAssociationFnmaInsuredLoansMember_BA996B4B159192FEABFBD47EA8736589" xlink:type="arc" />
    <link:label id="lab_us-gaap_GovernmentNationalMortgageAssociationGnmaInsuredLoansMember_5568FD2A1CDD64140676D47EA873F939_terseLabel_en-US" xlink:label="lab_us-gaap_GovernmentNationalMortgageAssociationGnmaInsuredLoansMember_5568FD2A1CDD64140676D47EA873F939" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">GNMA [Member]</link:label>
    <link:label id="lab_us-gaap_GovernmentNationalMortgageAssociationGnmaInsuredLoansMember_5568FD2A1CDD64140676D47EA873F939_label_en-US" xlink:label="lab_us-gaap_GovernmentNationalMortgageAssociationGnmaInsuredLoansMember_5568FD2A1CDD64140676D47EA873F939" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Government National Mortgage Association (GNMA) Insured Loans [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_GovernmentNationalMortgageAssociationGnmaInsuredLoansMember" xlink:label="loc_us-gaap_GovernmentNationalMortgageAssociationGnmaInsuredLoansMember_5568FD2A1CDD64140676D47EA873F939" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GovernmentNationalMortgageAssociationGnmaInsuredLoansMember_5568FD2A1CDD64140676D47EA873F939" xlink:to="lab_us-gaap_GovernmentNationalMortgageAssociationGnmaInsuredLoansMember_5568FD2A1CDD64140676D47EA873F939" xlink:type="arc" />
    <link:label id="lab_bokf_OtherInvestorLoansMember_DA4760891AC195499BD4D47EA87355E8_terseLabel_en-US" xlink:label="lab_bokf_OtherInvestorLoansMember_DA4760891AC195499BD4D47EA87355E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other [Member]</link:label>
    <link:label id="lab_bokf_OtherInvestorLoansMember_DA4760891AC195499BD4D47EA87355E8_label_en-US" xlink:label="lab_bokf_OtherInvestorLoansMember_DA4760891AC195499BD4D47EA87355E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Investor Loans [Member]</link:label>
    <link:label id="lab_bokf_OtherInvestorLoansMember_DA4760891AC195499BD4D47EA87355E8_documentation_en-US" xlink:label="lab_bokf_OtherInvestorLoansMember_DA4760891AC195499BD4D47EA87355E8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans provided by a type of investor not previously identified.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_OtherInvestorLoansMember" xlink:label="loc_bokf_OtherInvestorLoansMember_DA4760891AC195499BD4D47EA87355E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_OtherInvestorLoansMember_DA4760891AC195499BD4D47EA87355E8" xlink:to="lab_bokf_OtherInvestorLoansMember_DA4760891AC195499BD4D47EA87355E8" xlink:type="arc" />
    <link:label id="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersLineItems_5CDF540DF164E13FEFD8D47EA873D7C1_terseLabel_en-US" xlink:label="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersLineItems_5CDF540DF164E13FEFD8D47EA873D7C1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Aging of Mortgage Loans Serviced For Others [Line Items]</link:label>
    <link:label id="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersLineItems_5CDF540DF164E13FEFD8D47EA873D7C1_label_en-US" xlink:label="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersLineItems_5CDF540DF164E13FEFD8D47EA873D7C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Aging of Mortgage Loans Serviced For Others [Line Items]</link:label>
    <link:label id="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersLineItems_5CDF540DF164E13FEFD8D47EA873D7C1_documentation_en-US" xlink:label="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersLineItems_5CDF540DF164E13FEFD8D47EA873D7C1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">-- None. No documentation exists for this element. --</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersLineItems" xlink:label="loc_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersLineItems_5CDF540DF164E13FEFD8D47EA873D7C1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersLineItems_5CDF540DF164E13FEFD8D47EA873D7C1" xlink:to="lab_bokf_ScheduleOfAgingOfMortgageLoansServicedForOthersLineItems_5CDF540DF164E13FEFD8D47EA873D7C1" xlink:type="arc" />
    <link:label id="lab_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_B36C40D645995E61C1D0D47EA874B535_terseLabel_en-US" xlink:label="lab_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_B36C40D645995E61C1D0D47EA874B535" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Financing Receivable, Recorded Investment, Aging [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_B36C40D645995E61C1D0D47EA874B535" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_B36C40D645995E61C1D0D47EA874B535" xlink:to="lab_us-gaap_FinancingReceivableRecordedInvestmentAgingAbstract_B36C40D645995E61C1D0D47EA874B535" xlink:type="arc" />
    <link:label id="lab_bokf_LoansServicedForOthersCurrent_33DDD1BCE2010D0F6B00D47EA8745A98_terseLabel_en-US" xlink:label="lab_bokf_LoansServicedForOthersCurrent_33DDD1BCE2010D0F6B00D47EA8745A98" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current</link:label>
    <link:label id="lab_bokf_LoansServicedForOthersCurrent_33DDD1BCE2010D0F6B00D47EA8745A98_label_en-US" xlink:label="lab_bokf_LoansServicedForOthersCurrent_33DDD1BCE2010D0F6B00D47EA8745A98" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Serviced For Others current</link:label>
    <link:label id="lab_bokf_LoansServicedForOthersCurrent_33DDD1BCE2010D0F6B00D47EA8745A98_documentation_en-US" xlink:label="lab_bokf_LoansServicedForOthersCurrent_33DDD1BCE2010D0F6B00D47EA8745A98" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The current portion dollar amount of principal for mortgage loans being serviced for others.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_LoansServicedForOthersCurrent" xlink:label="loc_bokf_LoansServicedForOthersCurrent_33DDD1BCE2010D0F6B00D47EA8745A98" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_LoansServicedForOthersCurrent_33DDD1BCE2010D0F6B00D47EA8745A98" xlink:to="lab_bokf_LoansServicedForOthersCurrent_33DDD1BCE2010D0F6B00D47EA8745A98" xlink:type="arc" />
    <link:label id="lab_bokf_LoansServicedForOthers30To59DaysPastDue_DDAC72769D61DE8FCFA5D47EA8746EBC_terseLabel_en-US" xlink:label="lab_bokf_LoansServicedForOthers30To59DaysPastDue_DDAC72769D61DE8FCFA5D47EA8746EBC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">30 to 59 Days Past Due</link:label>
    <link:label id="lab_bokf_LoansServicedForOthers30To59DaysPastDue_DDAC72769D61DE8FCFA5D47EA8746EBC_label_en-US" xlink:label="lab_bokf_LoansServicedForOthers30To59DaysPastDue_DDAC72769D61DE8FCFA5D47EA8746EBC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Serviced For Others30 To59 Days Past Due</link:label>
    <link:label id="lab_bokf_LoansServicedForOthers30To59DaysPastDue_DDAC72769D61DE8FCFA5D47EA8746EBC_documentation_en-US" xlink:label="lab_bokf_LoansServicedForOthers30To59DaysPastDue_DDAC72769D61DE8FCFA5D47EA8746EBC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Serviced for Others that are less than 60 days past due but more than 29 days past due.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_LoansServicedForOthers30To59DaysPastDue" xlink:label="loc_bokf_LoansServicedForOthers30To59DaysPastDue_DDAC72769D61DE8FCFA5D47EA8746EBC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_LoansServicedForOthers30To59DaysPastDue_DDAC72769D61DE8FCFA5D47EA8746EBC" xlink:to="lab_bokf_LoansServicedForOthers30To59DaysPastDue_DDAC72769D61DE8FCFA5D47EA8746EBC" xlink:type="arc" />
    <link:label id="lab_bokf_LoansServicedForOthers60To89DaysPastDue_B5048F286D73624800C8D47EA874ABBB_terseLabel_en-US" xlink:label="lab_bokf_LoansServicedForOthers60To89DaysPastDue_B5048F286D73624800C8D47EA874ABBB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">60 to 89 Days Past Due</link:label>
    <link:label id="lab_bokf_LoansServicedForOthers60To89DaysPastDue_B5048F286D73624800C8D47EA874ABBB_label_en-US" xlink:label="lab_bokf_LoansServicedForOthers60To89DaysPastDue_B5048F286D73624800C8D47EA874ABBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Serviced For Others60 To89 Days Past Due</link:label>
    <link:label id="lab_bokf_LoansServicedForOthers60To89DaysPastDue_B5048F286D73624800C8D47EA874ABBB_documentation_en-US" xlink:label="lab_bokf_LoansServicedForOthers60To89DaysPastDue_B5048F286D73624800C8D47EA874ABBB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Serviced for Others that are less than 90 days past due but more than 59 days past due.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_LoansServicedForOthers60To89DaysPastDue" xlink:label="loc_bokf_LoansServicedForOthers60To89DaysPastDue_B5048F286D73624800C8D47EA874ABBB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_LoansServicedForOthers60To89DaysPastDue_B5048F286D73624800C8D47EA874ABBB" xlink:to="lab_bokf_LoansServicedForOthers60To89DaysPastDue_B5048F286D73624800C8D47EA874ABBB" xlink:type="arc" />
    <link:label id="lab_bokf_LoansServicedForOtherstEqualToGreaterThan90DaysPastDue_2CC2AC078BB415414116D47EA8745982_terseLabel_en-US" xlink:label="lab_bokf_LoansServicedForOtherstEqualToGreaterThan90DaysPastDue_2CC2AC078BB415414116D47EA8745982" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">90 Days or More Past Due</link:label>
    <link:label id="lab_bokf_LoansServicedForOtherstEqualToGreaterThan90DaysPastDue_2CC2AC078BB415414116D47EA8745982_label_en-US" xlink:label="lab_bokf_LoansServicedForOtherstEqualToGreaterThan90DaysPastDue_2CC2AC078BB415414116D47EA8745982" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Serviced For Otherst Equal To Greater Than90 Days Past Due</link:label>
    <link:label id="lab_bokf_LoansServicedForOtherstEqualToGreaterThan90DaysPastDue_2CC2AC078BB415414116D47EA8745982_documentation_en-US" xlink:label="lab_bokf_LoansServicedForOtherstEqualToGreaterThan90DaysPastDue_2CC2AC078BB415414116D47EA8745982" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loans Serviced for Others that are equal to or greater than 90 days past due.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_LoansServicedForOtherstEqualToGreaterThan90DaysPastDue" xlink:label="loc_bokf_LoansServicedForOtherstEqualToGreaterThan90DaysPastDue_2CC2AC078BB415414116D47EA8745982" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_LoansServicedForOtherstEqualToGreaterThan90DaysPastDue_2CC2AC078BB415414116D47EA8745982" xlink:to="lab_bokf_LoansServicedForOtherstEqualToGreaterThan90DaysPastDue_2CC2AC078BB415414116D47EA8745982" xlink:type="arc" />
    <link:label id="lab_bokf_LoansServicedForOthers_B329358501C56FCCEC28D47EA87494B3_totalLabel_en-US" xlink:label="lab_bokf_LoansServicedForOthers_B329358501C56FCCEC28D47EA87494B3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_bokf_LoansServicedForOthers_B329358501C56FCCEC28D47EA87494B3_label_en-US" xlink:label="lab_bokf_LoansServicedForOthers_B329358501C56FCCEC28D47EA87494B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Serviced For Others</link:label>
    <link:label id="lab_bokf_LoansServicedForOthers_B329358501C56FCCEC28D47EA87494B3_documentation_en-US" xlink:label="lab_bokf_LoansServicedForOthers_B329358501C56FCCEC28D47EA87494B3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The dollar amount of principal for mortgage loans being serviced for others.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_LoansServicedForOthers" xlink:label="loc_bokf_LoansServicedForOthers_B329358501C56FCCEC28D47EA87494B3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_LoansServicedForOthers_B329358501C56FCCEC28D47EA87494B3" xlink:to="lab_bokf_LoansServicedForOthers_B329358501C56FCCEC28D47EA87494B3" xlink:type="arc" />
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_387E03514FE4924DC0C0D47EA69B01E8_terseLabel_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_387E03514FE4924DC0C0D47EA69B01E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Disaggregation of Fees and Commissions Revenue [Table Text Block]</link:label>
    <link:label id="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_387E03514FE4924DC0C0D47EA69B01E8_label_en-US" xlink:label="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_387E03514FE4924DC0C0D47EA69B01E8" 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_387E03514FE4924DC0C0D47EA69B01E8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_387E03514FE4924DC0C0D47EA69B01E8" xlink:to="lab_us-gaap_DisaggregationOfRevenueTableTextBlock_387E03514FE4924DC0C0D47EA69B01E8" xlink:type="arc" />
    <link:label id="lab_bokf_FairValueMeasurementsMeasuredOnRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_AF25F7E9501963C2B024C5C6FD2FB57C_label_en-US" xlink:label="lab_bokf_FairValueMeasurementsMeasuredOnRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_AF25F7E9501963C2B024C5C6FD2FB57C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair Value Measurements, Measured On Recurring Basis, Significant Unobservable Inputs, Quantitative Information [Abstract]</link:label>
    <link:label id="lab_bokf_FairValueMeasurementsMeasuredOnRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_AF25F7E9501963C2B024C5C6FD2FB57C_documentation_en-US" xlink:label="lab_bokf_FairValueMeasurementsMeasuredOnRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_AF25F7E9501963C2B024C5C6FD2FB57C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair Value Measurements, Measured On Recurring Basis, Significant Unobservable Inputs, Quantitative Information [Abstract]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_FairValueMeasurementsMeasuredOnRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract" xlink:label="loc_bokf_FairValueMeasurementsMeasuredOnRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_AF25F7E9501963C2B024C5C6FD2FB57C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_FairValueMeasurementsMeasuredOnRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_AF25F7E9501963C2B024C5C6FD2FB57C" xlink:to="lab_bokf_FairValueMeasurementsMeasuredOnRecurringBasisSignificantUnobservableInputsQuantitativeInformationAbstract_AF25F7E9501963C2B024C5C6FD2FB57C" xlink:type="arc" />
    <link:label id="lab_bokf_InterestRateSpreadMember_BF91A9E76EDF0D865BDEC5C6FD311049_terseLabel_en-US" xlink:label="lab_bokf_InterestRateSpreadMember_BF91A9E76EDF0D865BDEC5C6FD311049" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Spread [Member]</link:label>
    <link:label id="lab_bokf_InterestRateSpreadMember_BF91A9E76EDF0D865BDEC5C6FD311049_label_en-US" xlink:label="lab_bokf_InterestRateSpreadMember_BF91A9E76EDF0D865BDEC5C6FD311049" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Spread [Member]</link:label>
    <link:label id="lab_bokf_InterestRateSpreadMember_BF91A9E76EDF0D865BDEC5C6FD311049_documentation_en-US" xlink:label="lab_bokf_InterestRateSpreadMember_BF91A9E76EDF0D865BDEC5C6FD311049" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Spread [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InterestRateSpreadMember" xlink:label="loc_bokf_InterestRateSpreadMember_BF91A9E76EDF0D865BDEC5C6FD311049" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InterestRateSpreadMember_BF91A9E76EDF0D865BDEC5C6FD311049" xlink:to="lab_bokf_InterestRateSpreadMember_BF91A9E76EDF0D865BDEC5C6FD311049" xlink:type="arc" />
    <link:label id="lab_us-gaap_MeasurementInputDiscountForLackOfMarketabilityMember_F4DD0F4EC554828DE204C63988D78848_terseLabel_en-US" xlink:label="lab_us-gaap_MeasurementInputDiscountForLackOfMarketabilityMember_F4DD0F4EC554828DE204C63988D78848" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liquidity discount [Member]</link:label>
    <link:label id="lab_us-gaap_MeasurementInputDiscountForLackOfMarketabilityMember_F4DD0F4EC554828DE204C63988D78848_label_en-US" xlink:label="lab_us-gaap_MeasurementInputDiscountForLackOfMarketabilityMember_F4DD0F4EC554828DE204C63988D78848" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Measurement Input, Discount for Lack of Marketability [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MeasurementInputDiscountForLackOfMarketabilityMember" xlink:label="loc_us-gaap_MeasurementInputDiscountForLackOfMarketabilityMember_F4DD0F4EC554828DE204C63988D78848" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MeasurementInputDiscountForLackOfMarketabilityMember_F4DD0F4EC554828DE204C63988D78848" xlink:to="lab_us-gaap_MeasurementInputDiscountForLackOfMarketabilityMember_F4DD0F4EC554828DE204C63988D78848" xlink:type="arc" />
    <link:label id="lab_bokf_QuotedpricesofloanssoldinsecuritizationtransactionswithaliquiditydiscountappliedMember_463C93C323C4ECBED1E9C5C6FD327A23_terseLabel_en-US" xlink:label="lab_bokf_QuotedpricesofloanssoldinsecuritizationtransactionswithaliquiditydiscountappliedMember_463C93C323C4ECBED1E9C5C6FD327A23" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Quoted prices of loans sold in securitization transactions, with a liquidity discount applied [Member]</link:label>
    <link:label id="lab_bokf_QuotedpricesofloanssoldinsecuritizationtransactionswithaliquiditydiscountappliedMember_463C93C323C4ECBED1E9C5C6FD327A23_label_en-US" xlink:label="lab_bokf_QuotedpricesofloanssoldinsecuritizationtransactionswithaliquiditydiscountappliedMember_463C93C323C4ECBED1E9C5C6FD327A23" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Quoted prices of loans sold in securitization transactions, with a liquidity discount applied [Member]</link:label>
    <link:label id="lab_bokf_QuotedpricesofloanssoldinsecuritizationtransactionswithaliquiditydiscountappliedMember_463C93C323C4ECBED1E9C5C6FD327A23_documentation_en-US" xlink:label="lab_bokf_QuotedpricesofloanssoldinsecuritizationtransactionswithaliquiditydiscountappliedMember_463C93C323C4ECBED1E9C5C6FD327A23" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Quoted prices of loans sold in securitization transactions, with a liquidity discount applied [Member]</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_QuotedpricesofloanssoldinsecuritizationtransactionswithaliquiditydiscountappliedMember" xlink:label="loc_bokf_QuotedpricesofloanssoldinsecuritizationtransactionswithaliquiditydiscountappliedMember_463C93C323C4ECBED1E9C5C6FD327A23" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_QuotedpricesofloanssoldinsecuritizationtransactionswithaliquiditydiscountappliedMember_463C93C323C4ECBED1E9C5C6FD327A23" xlink:to="lab_bokf_QuotedpricesofloanssoldinsecuritizationtransactionswithaliquiditydiscountappliedMember_463C93C323C4ECBED1E9C5C6FD327A23" xlink:type="arc" />
    <link:label id="lab_bokf_LiquidityDiscountonMortgageLoansQualifyingforSaletoUSGovtAgencies_55D5045321ACB01B8343C5C6FD36CFC5_terseLabel_en-US" xlink:label="lab_bokf_LiquidityDiscountonMortgageLoansQualifyingforSaletoUSGovtAgencies_55D5045321ACB01B8343C5C6FD36CFC5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liquidity Discount on Mortgage Loans Qualifying for Sale to US Govt Agencies</link:label>
    <link:label id="lab_bokf_LiquidityDiscountonMortgageLoansQualifyingforSaletoUSGovtAgencies_55D5045321ACB01B8343C5C6FD36CFC5_label_en-US" xlink:label="lab_bokf_LiquidityDiscountonMortgageLoansQualifyingforSaletoUSGovtAgencies_55D5045321ACB01B8343C5C6FD36CFC5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liquidity Discount on Mortgage Loans Qualifying for Sale to US Govt Agencies</link:label>
    <link:label id="lab_bokf_LiquidityDiscountonMortgageLoansQualifyingforSaletoUSGovtAgencies_55D5045321ACB01B8343C5C6FD36CFC5_documentation_en-US" xlink:label="lab_bokf_LiquidityDiscountonMortgageLoansQualifyingforSaletoUSGovtAgencies_55D5045321ACB01B8343C5C6FD36CFC5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents a liquidity discount applied to the market value of mortgage loans qualifying for sale to U.S. government agencies when a mortgage loan is ineligible for sale to U.S. government agencies.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_LiquidityDiscountonMortgageLoansQualifyingforSaletoUSGovtAgencies" xlink:label="loc_bokf_LiquidityDiscountonMortgageLoansQualifyingforSaletoUSGovtAgencies_55D5045321ACB01B8343C5C6FD36CFC5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_LiquidityDiscountonMortgageLoansQualifyingforSaletoUSGovtAgencies_55D5045321ACB01B8343C5C6FD36CFC5" xlink:to="lab_bokf_LiquidityDiscountonMortgageLoansQualifyingforSaletoUSGovtAgencies_55D5045321ACB01B8343C5C6FD36CFC5" xlink:type="arc" />
    <link:label id="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMinimum_5FFDBED5526A624DD846C5C6FD36CE1E_terseLabel_en-US" xlink:label="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMinimum_5FFDBED5526A624DD846C5C6FD36CE1E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Grade Tax Exempt Securities Yield Spread Over Comparable Securities Minimum</link:label>
    <link:label id="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMinimum_5FFDBED5526A624DD846C5C6FD36CE1E_label_en-US" xlink:label="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMinimum_5FFDBED5526A624DD846C5C6FD36CE1E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Grade Tax Exempt Securities Yield Spread Over Comparable Securities Minimum</link:label>
    <link:label id="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMinimum_5FFDBED5526A624DD846C5C6FD36CE1E_documentation_en-US" xlink:label="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMinimum_5FFDBED5526A624DD846C5C6FD36CE1E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The minimum yield spread of tax-exempt investment grade securities over comparable tax-exempt securities expressed as basis points.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMinimum" xlink:label="loc_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMinimum_5FFDBED5526A624DD846C5C6FD36CE1E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMinimum_5FFDBED5526A624DD846C5C6FD36CE1E" xlink:to="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMinimum_5FFDBED5526A624DD846C5C6FD36CE1E" xlink:type="arc" />
    <link:label id="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMaximum_AA323AC030A75D6C09B8C5C6FD366A75_terseLabel_en-US" xlink:label="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMaximum_AA323AC030A75D6C09B8C5C6FD366A75" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investment Grade Tax Exempt Securities Yield Spread Over Comparable Securities Maximum</link:label>
    <link:label id="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMaximum_AA323AC030A75D6C09B8C5C6FD366A75_label_en-US" xlink:label="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMaximum_AA323AC030A75D6C09B8C5C6FD366A75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investment Grade Tax Exempt Securities Yield Spread Over Comparable Securities Maximum</link:label>
    <link:label id="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMaximum_AA323AC030A75D6C09B8C5C6FD366A75_documentation_en-US" xlink:label="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMaximum_AA323AC030A75D6C09B8C5C6FD366A75" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The maximum yield spread of tax-exempt investment grade securities over comparable tax-exempt securities.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMaximum" xlink:label="loc_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMaximum_AA323AC030A75D6C09B8C5C6FD366A75" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMaximum_AA323AC030A75D6C09B8C5C6FD366A75" xlink:to="lab_bokf_InvestmentGradeTaxExemptSecuritiesYieldSpreadOverComparableSecuritiesMaximum_AA323AC030A75D6C09B8C5C6FD366A75" xlink:type="arc" />
    <link:label id="lab_bokf_AverageYieldsOnComparableShortTermTaxableSecuritiesMaximum_757A76DB0E8EC5E88386C5C6FD36E44D_terseLabel_en-US" xlink:label="lab_bokf_AverageYieldsOnComparableShortTermTaxableSecuritiesMaximum_757A76DB0E8EC5E88386C5C6FD36E44D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Average Yields On Comparable Short-term Taxable Securities Maximum</link:label>
    <link:label id="lab_bokf_AverageYieldsOnComparableShortTermTaxableSecuritiesMaximum_757A76DB0E8EC5E88386C5C6FD36E44D_label_en-US" xlink:label="lab_bokf_AverageYieldsOnComparableShortTermTaxableSecuritiesMaximum_757A76DB0E8EC5E88386C5C6FD36E44D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Average Yields On Comparable Short-term Taxable Securities Maximum</link:label>
    <link:label id="lab_bokf_AverageYieldsOnComparableShortTermTaxableSecuritiesMaximum_757A76DB0E8EC5E88386C5C6FD36E44D_documentation_en-US" xlink:label="lab_bokf_AverageYieldsOnComparableShortTermTaxableSecuritiesMaximum_757A76DB0E8EC5E88386C5C6FD36E44D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The average rate of yield for comparable short-term investment grade taxable security.</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_AverageYieldsOnComparableShortTermTaxableSecuritiesMaximum" xlink:label="loc_bokf_AverageYieldsOnComparableShortTermTaxableSecuritiesMaximum_757A76DB0E8EC5E88386C5C6FD36E44D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_AverageYieldsOnComparableShortTermTaxableSecuritiesMaximum_757A76DB0E8EC5E88386C5C6FD36E44D" xlink:to="lab_bokf_AverageYieldsOnComparableShortTermTaxableSecuritiesMaximum_757A76DB0E8EC5E88386C5C6FD36E44D" xlink:type="arc" />
    <link:label id="lab_bokf_Rangeoffairvalueasapercentageofpartvalue_93832A4052C65DA32B2DC5C6FD3705AD_terseLabel_en-US" xlink:label="lab_bokf_Rangeoffairvalueasapercentageofpartvalue_93832A4052C65DA32B2DC5C6FD3705AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Range of fair value as a percentage of par value</link:label>
    <link:label id="lab_bokf_Rangeoffairvalueasapercentageofpartvalue_93832A4052C65DA32B2DC5C6FD3705AD_label_en-US" xlink:label="lab_bokf_Rangeoffairvalueasapercentageofpartvalue_93832A4052C65DA32B2DC5C6FD3705AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Range of fair value as a percentage of part value</link:label>
    <link:label id="lab_bokf_Rangeoffairvalueasapercentageofpartvalue_93832A4052C65DA32B2DC5C6FD3705AD_documentation_en-US" xlink:label="lab_bokf_Rangeoffairvalueasapercentageofpartvalue_93832A4052C65DA32B2DC5C6FD3705AD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Range of fair value as a percentage of part value</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_Rangeoffairvalueasapercentageofpartvalue" xlink:label="loc_bokf_Rangeoffairvalueasapercentageofpartvalue_93832A4052C65DA32B2DC5C6FD3705AD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_Rangeoffairvalueasapercentageofpartvalue_93832A4052C65DA32B2DC5C6FD3705AD" xlink:to="lab_bokf_Rangeoffairvalueasapercentageofpartvalue_93832A4052C65DA32B2DC5C6FD3705AD" xlink:type="arc" />
    <link:label id="lab_bokf_RangeofInterestRatesusedtoValueSecurities_3EBFA2509B8659EA5847C5C6FD377FC4_terseLabel_en-US" xlink:label="lab_bokf_RangeofInterestRatesusedtoValueSecurities_3EBFA2509B8659EA5847C5C6FD377FC4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Range of Interest Rates used to Value Securities</link:label>
    <link:label id="lab_bokf_RangeofInterestRatesusedtoValueSecurities_3EBFA2509B8659EA5847C5C6FD377FC4_label_en-US" xlink:label="lab_bokf_RangeofInterestRatesusedtoValueSecurities_3EBFA2509B8659EA5847C5C6FD377FC4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Range of Interest Rates used to Value Securities</link:label>
    <link:label id="lab_bokf_RangeofInterestRatesusedtoValueSecurities_3EBFA2509B8659EA5847C5C6FD377FC4_documentation_en-US" xlink:label="lab_bokf_RangeofInterestRatesusedtoValueSecurities_3EBFA2509B8659EA5847C5C6FD377FC4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Range of Interest Rates used to Value Securities</link:label>
    <link:loc xlink:href="bokf-20180630.xsd#bokf_RangeofInterestRatesusedtoValueSecurities" xlink:label="loc_bokf_RangeofInterestRatesusedtoValueSecurities_3EBFA2509B8659EA5847C5C6FD377FC4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bokf_RangeofInterestRatesusedtoValueSecurities_3EBFA2509B8659EA5847C5C6FD377FC4" xlink:to="lab_bokf_RangeofInterestRatesusedtoValueSecurities_3EBFA2509B8659EA5847C5C6FD377FC4" xlink:type="arc" />
  </link:labelLink>
</link:linkbase>
