<?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.glacierbancorp.com/role/AccumulatedOtherComprehensiveIncomeDetails" xlink:href="gbci-20171231.xsd#AccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:href="gbci-20171231.xsd#AccumulatedOtherComprehensiveIncomeLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/AccumulatedOtherComprehensiveIncomeLossTables" xlink:href="gbci-20171231.xsd#AccumulatedOtherComprehensiveIncomeLossTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/AlllActivityDetails" xlink:href="gbci-20171231.xsd#AlllActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/AmortizedCostGrossUnrealizedGainsAndLossesAndFairValueOfInvestmentSecuritiesDetails" xlink:href="gbci-20171231.xsd#AmortizedCostGrossUnrealizedGainsAndLossesAndFairValueOfInvestmentSecuritiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/Borrowings" xlink:href="gbci-20171231.xsd#Borrowings" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/BorrowingsDetailsTextual" xlink:href="gbci-20171231.xsd#BorrowingsDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/BorrowingsSummaryOfRepurchaseAgreementsDetails" xlink:href="gbci-20171231.xsd#BorrowingsSummaryOfRepurchaseAgreementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/BorrowingsTables" xlink:href="gbci-20171231.xsd#BorrowingsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/CarryingAmountAndFairValueOfFinancialInstrumentsDetails" xlink:href="gbci-20171231.xsd#CarryingAmountAndFairValueOfFinancialInstrumentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ChangesInCarryingValueOfGoodwillDetails" xlink:href="gbci-20171231.xsd#ChangesInCarryingValueOfGoodwillDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/CondensedStatementsOfCashFlowsDetails" xlink:href="gbci-20171231.xsd#CondensedStatementsOfCashFlowsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/CondensedStatementsOfFinancialConditionDetails" xlink:href="gbci-20171231.xsd#CondensedStatementsOfFinancialConditionDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/CondensedStatementsOfOperationsAndComprehensiveIncomeDetails" xlink:href="gbci-20171231.xsd#CondensedStatementsOfOperationsAndComprehensiveIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ConsiderationTransferredIdentifiableNetAssetsAcquiredAndGoodwillRecognizedDetails" xlink:href="gbci-20171231.xsd#ConsiderationTransferredIdentifiableNetAssetsAcquiredAndGoodwillRecognizedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="gbci-20171231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfChangesInStockholdersEquity" xlink:href="gbci-20171231.xsd#ConsolidatedStatementsOfChangesInStockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfFinancialCondition" xlink:href="gbci-20171231.xsd#ConsolidatedStatementsOfFinancialCondition" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfFinancialConditionParenthetical" xlink:href="gbci-20171231.xsd#ConsolidatedStatementsOfFinancialConditionParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfOperations" xlink:href="gbci-20171231.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfStockholdersEquityParenthetical" xlink:href="gbci-20171231.xsd#ConsolidatedStatementsOfStockholdersEquityParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ContingenciesAndCommitments" xlink:href="gbci-20171231.xsd#ContingenciesAndCommitments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ContingenciesAndCommitmentsDetails" xlink:href="gbci-20171231.xsd#ContingenciesAndCommitmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ContingenciesAndCommitmentsTables" xlink:href="gbci-20171231.xsd#ContingenciesAndCommitmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/DeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" xlink:href="gbci-20171231.xsd#DeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/Deposits" xlink:href="gbci-20171231.xsd#Deposits" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/DepositsDetailsTextual" xlink:href="gbci-20171231.xsd#DepositsDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/DepositsTables" xlink:href="gbci-20171231.xsd#DepositsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivities" xlink:href="gbci-20171231.xsd#DerivativesAndHedgingActivities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivitiesDerivativesAndHedgingActivitiesDetailsTextual" xlink:href="gbci-20171231.xsd#DerivativesAndHedgingActivitiesDerivativesAndHedgingActivitiesDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivitiesInterestRateSwapGainsOrLossesDetails" xlink:href="gbci-20171231.xsd#DerivativesAndHedgingActivitiesInterestRateSwapGainsOrLossesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivitiesOffsettingAssetsDetails" xlink:href="gbci-20171231.xsd#DerivativesAndHedgingActivitiesOffsettingAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivitiesOffsettingLiabilitiesDetails" xlink:href="gbci-20171231.xsd#DerivativesAndHedgingActivitiesOffsettingLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivitiesTables" xlink:href="gbci-20171231.xsd#DerivativesAndHedgingActivitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/DocumentAndEntityInformation" xlink:href="gbci-20171231.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/EarningsPerShare" xlink:href="gbci-20171231.xsd#EarningsPerShare" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/EarningsPerShareDetails" xlink:href="gbci-20171231.xsd#EarningsPerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/EarningsPerShareTables" xlink:href="gbci-20171231.xsd#EarningsPerShareTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/EmployeeBenefitPlans" xlink:href="gbci-20171231.xsd#EmployeeBenefitPlans" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/EmployeeBenefitPlansDetailsTextual" xlink:href="gbci-20171231.xsd#EmployeeBenefitPlansDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/FairValueMeasurementsDetailsTextual" xlink:href="gbci-20171231.xsd#FairValueMeasurementsDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/FairValueMeasurementsOnNonRecurringBasisDetails" xlink:href="gbci-20171231.xsd#FairValueMeasurementsOnNonRecurringBasisDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/FairValueMeasurementsOnRecurringBasisDetails" xlink:href="gbci-20171231.xsd#FairValueMeasurementsOnRecurringBasisDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/FairValueOfAssetsAndLiabilities" xlink:href="gbci-20171231.xsd#FairValueOfAssetsAndLiabilities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/FairValueOfAssetsAndLiabilitiesQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" xlink:href="gbci-20171231.xsd#FairValueOfAssetsAndLiabilitiesQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/FairValueOfAssetsAndLiabilitiesTables" xlink:href="gbci-20171231.xsd#FairValueOfAssetsAndLiabilitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/FederalAndStateIncomeTaxes" xlink:href="gbci-20171231.xsd#FederalAndStateIncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/FederalAndStateIncomeTaxesDetailsTextual" xlink:href="gbci-20171231.xsd#FederalAndStateIncomeTaxesDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/FederalAndStateIncomeTaxesTables" xlink:href="gbci-20171231.xsd#FederalAndStateIncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/GainOrLossOnSaleOfInvestmentsDetails" xlink:href="gbci-20171231.xsd#GainOrLossOnSaleOfInvestmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ImpairedLoansDetails" xlink:href="gbci-20171231.xsd#ImpairedLoansDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/InterestRateSwapSummaryDetails" xlink:href="gbci-20171231.xsd#InterestRateSwapSummaryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/InvestmentSecurities" xlink:href="gbci-20171231.xsd#InvestmentSecurities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/InvestmentSecuritiesDetailsTextual" xlink:href="gbci-20171231.xsd#InvestmentSecuritiesDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/InvestmentSecuritiesInvestmentSecuritiesMaturityScheduleDetails" xlink:href="gbci-20171231.xsd#InvestmentSecuritiesInvestmentSecuritiesMaturityScheduleDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/InvestmentSecuritiesTables" xlink:href="gbci-20171231.xsd#InvestmentSecuritiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/InvestmentsWithUnrealizedLossPositionDetails" xlink:href="gbci-20171231.xsd#InvestmentsWithUnrealizedLossPositionDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/LoansReceivableAgingAnalysisDetails" xlink:href="gbci-20171231.xsd#LoansReceivableAgingAnalysisDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/LoansReceivableNet" xlink:href="gbci-20171231.xsd#LoansReceivableNet" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/LoansReceivableNetAlllAndLoansReceivableSummaryDetails" xlink:href="gbci-20171231.xsd#LoansReceivableNetAlllAndLoansReceivableSummaryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/LoansReceivableNetDetailsTextual" xlink:href="gbci-20171231.xsd#LoansReceivableNetDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/LoansReceivableNetSummaryOfLoansReceivableDetails" xlink:href="gbci-20171231.xsd#LoansReceivableNetSummaryOfLoansReceivableDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/LoansReceivableNetTables" xlink:href="gbci-20171231.xsd#LoansReceivableNetTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/MergersAndAcquisitions" xlink:href="gbci-20171231.xsd#MergersAndAcquisitions" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/MergersAndAcquisitionsDetailsTextual" xlink:href="gbci-20171231.xsd#MergersAndAcquisitionsDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/MergersAndAcquisitionsTables" xlink:href="gbci-20171231.xsd#MergersAndAcquisitionsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/NatureOfOperationsAndSummaryOfSignificantAccountingPolicies" xlink:href="gbci-20171231.xsd#NatureOfOperationsAndSummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesDetailsTextual" xlink:href="gbci-20171231.xsd#NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="gbci-20171231.xsd#NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/NetCarryingValueOfCoreDepositIntangiblesDetails" xlink:href="gbci-20171231.xsd#NetCarryingValueOfCoreDepositIntangiblesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/OtherExpenses" xlink:href="gbci-20171231.xsd#OtherExpenses" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/OtherExpensesDetails" xlink:href="gbci-20171231.xsd#OtherExpensesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/OtherExpensesTables" xlink:href="gbci-20171231.xsd#OtherExpensesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/OtherIntangibleAssetsAndGoodwill" xlink:href="gbci-20171231.xsd#OtherIntangibleAssetsAndGoodwill" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/OtherIntangibleAssetsAndGoodwillOtherIntangibleAssetsAndGoodwillDetailsTextual" xlink:href="gbci-20171231.xsd#OtherIntangibleAssetsAndGoodwillOtherIntangibleAssetsAndGoodwillDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/OtherIntangibleAssetsAndGoodwillTables" xlink:href="gbci-20171231.xsd#OtherIntangibleAssetsAndGoodwillTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ParentHoldingCompanyInformationCondensed" xlink:href="gbci-20171231.xsd#ParentHoldingCompanyInformationCondensed" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ParentHoldingCompanyInformationCondensedTables" xlink:href="gbci-20171231.xsd#ParentHoldingCompanyInformationCondensedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/PremisesAndEquipment" xlink:href="gbci-20171231.xsd#PremisesAndEquipment" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/PremisesAndEquipmentDetailsTextual" xlink:href="gbci-20171231.xsd#PremisesAndEquipmentDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/PremisesAndEquipmentFutureMinimumRentalCommitmentsUnderOperatingAndCapitalLeasesDetails" xlink:href="gbci-20171231.xsd#PremisesAndEquipmentFutureMinimumRentalCommitmentsUnderOperatingAndCapitalLeasesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/PremisesAndEquipmentNetOfAccumulatedDepreciationDetails" xlink:href="gbci-20171231.xsd#PremisesAndEquipmentNetOfAccumulatedDepreciationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/PremisesAndEquipmentTables" xlink:href="gbci-20171231.xsd#PremisesAndEquipmentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ProFormaSummaryDetails" xlink:href="gbci-20171231.xsd#ProFormaSummaryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/RegulatoryCapital" xlink:href="gbci-20171231.xsd#RegulatoryCapital" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/RegulatoryCapitalDetails" xlink:href="gbci-20171231.xsd#RegulatoryCapitalDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/RegulatoryCapitalDetailsTextual" xlink:href="gbci-20171231.xsd#RegulatoryCapitalDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/RegulatoryCapitalTables" xlink:href="gbci-20171231.xsd#RegulatoryCapitalTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ScheduledMaturitiesOfFhlbAdvancesDetails" xlink:href="gbci-20171231.xsd#ScheduledMaturitiesOfFhlbAdvancesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/ScheduledMaturitiesOfTimeDepositsDetails" xlink:href="gbci-20171231.xsd#ScheduledMaturitiesOfTimeDepositsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/StatementsOfComprehensiveIncome" xlink:href="gbci-20171231.xsd#StatementsOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/StockBasedCompensationPlan" xlink:href="gbci-20171231.xsd#StockBasedCompensationPlan" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/StockBasedCompensationPlanDetailsTextual" xlink:href="gbci-20171231.xsd#StockBasedCompensationPlanDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/StockBasedCompensationPlanSummaryOfRestrictedStockAwardActivityDetails" xlink:href="gbci-20171231.xsd#StockBasedCompensationPlanSummaryOfRestrictedStockAwardActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/StockBasedCompensationPlanTables" xlink:href="gbci-20171231.xsd#StockBasedCompensationPlanTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/SubordinatedDebentures" xlink:href="gbci-20171231.xsd#SubordinatedDebentures" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/SubordinatedDebenturesDetails" xlink:href="gbci-20171231.xsd#SubordinatedDebenturesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/SubordinatedDebenturesDetailsTextual" xlink:href="gbci-20171231.xsd#SubordinatedDebenturesDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/SubordinatedDebenturesTables" xlink:href="gbci-20171231.xsd#SubordinatedDebenturesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/SubsequentEvents" xlink:href="gbci-20171231.xsd#SubsequentEvents" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/SubsequentEventsDetailsTextual" xlink:href="gbci-20171231.xsd#SubsequentEventsDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/SummaryOfEffectiveTaxRateDetails" xlink:href="gbci-20171231.xsd#SummaryOfEffectiveTaxRateDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/SummaryOfIncomeTaxExpenseDetails" xlink:href="gbci-20171231.xsd#SummaryOfIncomeTaxExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/TroubledDebtRestructuringsDetails" xlink:href="gbci-20171231.xsd#TroubledDebtRestructuringsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/UnauditedQuarterlyFinancialDataCondensed" xlink:href="gbci-20171231.xsd#UnauditedQuarterlyFinancialDataCondensed" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/UnauditedQuarterlyFinancialDataCondensedDetails" xlink:href="gbci-20171231.xsd#UnauditedQuarterlyFinancialDataCondensedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/UnauditedQuarterlyFinancialDataCondensedTables" xlink:href="gbci-20171231.xsd#UnauditedQuarterlyFinancialDataCondensedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/VariableInterestEntities" xlink:href="gbci-20171231.xsd#VariableInterestEntities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/VariableInterestEntitiesAmortizationExpenseAndTaxCreditsAndOtherTaxBenefitsDetails" xlink:href="gbci-20171231.xsd#VariableInterestEntitiesAmortizationExpenseAndTaxCreditsAndOtherTaxBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/VariableInterestEntitiesDetailsTextual" xlink:href="gbci-20171231.xsd#VariableInterestEntitiesDetailsTextual" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/VariableInterestEntitiesTables" xlink:href="gbci-20171231.xsd#VariableInterestEntitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/VariableInterestEntitiesVieCarryingAmountsIncludedInFinancialStatementsDetails" xlink:href="gbci-20171231.xsd#VariableInterestEntitiesVieCarryingAmountsIncludedInFinancialStatementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.glacierbancorp.com/role/YearsSubjectToExaminationDetails" xlink:href="gbci-20171231.xsd#YearsSubjectToExaminationDetails" xlink:type="simple" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/AccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_80870f71-876e-eaaa-f0a4-8338d8e9798b" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_80870f71-876e-eaaa-f0a4-8338d8e9798b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_c1323577-e536-9051-1401-d064e7621fd6" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_c1323577-e536-9051-1401-d064e7621fd6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_061de37f-a226-2a79-ad31-92c9dc51a118" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_061de37f-a226-2a79-ad31-92c9dc51a118" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/AccumulatedOtherComprehensiveIncomeLossTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/AlllActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/AmortizedCostGrossUnrealizedGainsAndLossesAndFairValueOfInvestmentSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:href="gbci-20171231.xsd#gbci_SecuritiesGrossUnrealizedGainAccumulatedinInvestments" xlink:label="loc_gbci_SecuritiesGrossUnrealizedGainAccumulatedinInvestments_5bc58ef5-4764-551e-1d78-7593f45f433e" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_1932fd43-f07d-5e04-493b-eca2ebb13c97" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_SecuritiesGrossUnrealizedGainAccumulatedinInvestments_5bc58ef5-4764-551e-1d78-7593f45f433e" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_1932fd43-f07d-5e04-493b-eca2ebb13c97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_034611ea-64e8-e6ac-6b57-530c530d2463" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_SecuritiesGrossUnrealizedGainAccumulatedinInvestments_5bc58ef5-4764-551e-1d78-7593f45f433e" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain_034611ea-64e8-e6ac-6b57-530c530d2463" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_DebtSecuritiesFairValue" xlink:label="loc_gbci_DebtSecuritiesFairValue_b6c495b5-fa88-2614-9c03-7593f4415e76" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_2c867d9b-5594-18ef-c82a-679b606d1bd3" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_DebtSecuritiesFairValue_b6c495b5-fa88-2614-9c03-7593f4415e76" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_2c867d9b-5594-18ef-c82a-679b606d1bd3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesFairValue_317678d5-aa75-7221-6f7e-512a1e9594ce" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_DebtSecuritiesFairValue_b6c495b5-fa88-2614-9c03-7593f4415e76" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesFairValue_317678d5-aa75-7221-6f7e-512a1e9594ce" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_SecuritiesGrossUnrealizedLossAccumulatedinInvestments1" xlink:label="loc_gbci_SecuritiesGrossUnrealizedLossAccumulatedinInvestments1_29E8159D79FE8BDBFA56B9CE13CD3F9F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_e96beffd-8ab7-62f8-402b-cfa1adccd68f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_SecuritiesGrossUnrealizedLossAccumulatedinInvestments1_29E8159D79FE8BDBFA56B9CE13CD3F9F" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_e96beffd-8ab7-62f8-402b-cfa1adccd68f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_04cbaa59-5eb0-e143-0a21-a553da1ab158" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_SecuritiesGrossUnrealizedLossAccumulatedinInvestments1_29E8159D79FE8BDBFA56B9CE13CD3F9F" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss_04cbaa59-5eb0-e143-0a21-a553da1ab158" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_DebtSecuritiesAmortizedCostBasis" xlink:label="loc_gbci_DebtSecuritiesAmortizedCostBasis_fa05d60f-dadb-bb29-596d-7593f448b2e4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_fc961581-2899-aa00-cc82-b67bd4267bb3" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_DebtSecuritiesAmortizedCostBasis_fa05d60f-dadb-bb29-596d-7593f448b2e4" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_fc961581-2899-aa00-cc82-b67bd4267bb3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_3bb8bc81-af51-9945-0a22-cc4527e07a17" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_DebtSecuritiesAmortizedCostBasis_fa05d60f-dadb-bb29-596d-7593f448b2e4" xlink:to="loc_us-gaap_HeldToMaturitySecurities_3bb8bc81-af51-9945-0a22-cc4527e07a17" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/Borrowings" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/BorrowingsDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/BorrowingsSummaryOfRepurchaseAgreementsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/BorrowingsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/CarryingAmountAndFairValueOfFinancialInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:href="gbci-20171231.xsd#gbci_FinancialAssetsFairValueDisclosure" xlink:label="loc_gbci_FinancialAssetsFairValueDisclosure_4a02a622-7120-58bf-bfed-7593f4549a9e" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_91fe4b11-d4f7-61c5-b8e1-4b77ba5422d2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_FinancialAssetsFairValueDisclosure_4a02a622-7120-58bf-bfed-7593f4549a9e" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_91fe4b11-d4f7-61c5-b8e1-4b77ba5422d2" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_AvailableforSaleInvestmentsFairValueDisclosure" xlink:label="loc_gbci_AvailableforSaleInvestmentsFairValueDisclosure_bd435f8c-9a57-d8f5-ce94-7593f4772aba" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_FinancialAssetsFairValueDisclosure_4a02a622-7120-58bf-bfed-7593f4549a9e" xlink:to="loc_gbci_AvailableforSaleInvestmentsFairValueDisclosure_bd435f8c-9a57-d8f5-ce94-7593f4772aba" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_HeldtoMaturityInvestmentsFairValueDisclosure" xlink:label="loc_gbci_HeldtoMaturityInvestmentsFairValueDisclosure_752985e0-cb91-2fe0-2683-7593f4a048bd" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_FinancialAssetsFairValueDisclosure_4a02a622-7120-58bf-bfed-7593f4549a9e" xlink:to="loc_gbci_HeldtoMaturityInvestmentsFairValueDisclosure_752985e0-cb91-2fe0-2683-7593f4a048bd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LoansHeldForSaleFairValueDisclosure" xlink:label="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_0c115d4e-ee44-dac0-73b8-3a5fae2d4e44" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_FinancialAssetsFairValueDisclosure_4a02a622-7120-58bf-bfed-7593f4549a9e" xlink:to="loc_us-gaap_LoansHeldForSaleFairValueDisclosure_0c115d4e-ee44-dac0-73b8-3a5fae2d4e44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LoansReceivableFairValueDisclosure" xlink:label="loc_us-gaap_LoansReceivableFairValueDisclosure_f19d0149-ff07-e1d1-572f-796374b31c39" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_FinancialAssetsFairValueDisclosure_4a02a622-7120-58bf-bfed-7593f4549a9e" xlink:to="loc_us-gaap_LoansReceivableFairValueDisclosure_f19d0149-ff07-e1d1-572f-796374b31c39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsReceivableFairValueDisclosure" xlink:label="loc_us-gaap_AccountsReceivableFairValueDisclosure_a39ecb28-0f80-7a1c-9c93-6fc5c76acb58" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_FinancialAssetsFairValueDisclosure_4a02a622-7120-58bf-bfed-7593f4549a9e" xlink:to="loc_us-gaap_AccountsReceivableFairValueDisclosure_a39ecb28-0f80-7a1c-9c93-6fc5c76acb58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostMethodInvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_CostMethodInvestmentsFairValueDisclosure_baa27c58-0cdc-b8c1-4098-d5e4159b4c34" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_FinancialAssetsFairValueDisclosure_4a02a622-7120-58bf-bfed-7593f4549a9e" xlink:to="loc_us-gaap_CostMethodInvestmentsFairValueDisclosure_baa27c58-0cdc-b8c1-4098-d5e4159b4c34" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FinancialLiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_1e5a0fee-1931-042a-f71d-6e84918672ec" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepositsFairValueDisclosure" xlink:label="loc_us-gaap_DepositsFairValueDisclosure_46e6aeaf-7802-356c-5c72-135d96cc74f7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_1e5a0fee-1931-042a-f71d-6e84918672ec" xlink:to="loc_us-gaap_DepositsFairValueDisclosure_46e6aeaf-7802-356c-5c72-135d96cc74f7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure" xlink:label="loc_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_3be144e9-febc-889f-bcf3-9a1c057cf22e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_1e5a0fee-1931-042a-f71d-6e84918672ec" xlink:to="loc_us-gaap_FederalHomeLoanBankBorrowingsFairValueDisclosure_3be144e9-febc-889f-bcf3-9a1c057cf22e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalFundsPurchasedAndSecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure" xlink:label="loc_us-gaap_FederalFundsPurchasedAndSecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure_60cf7809-e2b8-21db-eac2-a6d7450d7892" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_1e5a0fee-1931-042a-f71d-6e84918672ec" xlink:to="loc_us-gaap_FederalFundsPurchasedAndSecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure_60cf7809-e2b8-21db-eac2-a6d7450d7892" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_094683a2-6387-4aa1-c953-97a2079e632a" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_1e5a0fee-1931-042a-f71d-6e84918672ec" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations_094683a2-6387-4aa1-c953-97a2079e632a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesFairValueDisclosure_417dc7b0-a5c9-08ce-3756-11a1c0b2cf66" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_1e5a0fee-1931-042a-f71d-6e84918672ec" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesFairValueDisclosure_417dc7b0-a5c9-08ce-3756-11a1c0b2cf66" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeLiabilities" xlink:label="loc_us-gaap_DerivativeLiabilities_a3ccd28b-d904-f2d6-d218-02006f748e50" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_1e5a0fee-1931-042a-f71d-6e84918672ec" xlink:to="loc_us-gaap_DerivativeLiabilities_a3ccd28b-d904-f2d6-d218-02006f748e50" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ChangesInCarryingValueOfGoodwillDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/CondensedStatementsOfCashFlowsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/CondensedStatementsOfFinancialConditionDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/CondensedStatementsOfOperationsAndComprehensiveIncomeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:type="locator" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_IncomeBeforeEquityInUndistributedEarningsOfSubsidiaries" xlink:label="loc_gbci_IncomeBeforeEquityInUndistributedEarningsOfSubsidiaries_151b3f45-cc69-b58e-63c7-75982256b7f5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:to="loc_gbci_IncomeBeforeEquityInUndistributedEarningsOfSubsidiaries_151b3f45-cc69-b58e-63c7-75982256b7f5" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_EarningsBeforeIncomeTaxBenefitAndEquityInUndistributedEarningsOfSubsidiaries" xlink:label="loc_gbci_EarningsBeforeIncomeTaxBenefitAndEquityInUndistributedEarningsOfSubsidiaries_75c72974-7e0d-c012-cfdf-759824783ff2" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_IncomeBeforeEquityInUndistributedEarningsOfSubsidiaries_151b3f45-cc69-b58e-63c7-75982256b7f5" xlink:to="loc_gbci_EarningsBeforeIncomeTaxBenefitAndEquityInUndistributedEarningsOfSubsidiaries_75c72974-7e0d-c012-cfdf-759824783ff2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_33f76b65-31cf-be04-0849-25af345446d5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_EarningsBeforeIncomeTaxBenefitAndEquityInUndistributedEarningsOfSubsidiaries_75c72974-7e0d-c012-cfdf-759824783ff2" xlink:to="loc_us-gaap_Revenues_33f76b65-31cf-be04-0849-25af345446d5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentIncomeDividend" xlink:label="loc_us-gaap_InvestmentIncomeDividend_713489d5-e3c9-5fb8-9bbc-2ec6a50945c9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_33f76b65-31cf-be04-0849-25af345446d5" xlink:to="loc_us-gaap_InvestmentIncomeDividend_713489d5-e3c9-5fb8-9bbc-2ec6a50945c9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherIncome" xlink:label="loc_us-gaap_OtherIncome_67402d53-bb55-2723-1295-126624c5472c" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_33f76b65-31cf-be04-0849-25af345446d5" xlink:to="loc_us-gaap_OtherIncome_67402d53-bb55-2723-1295-126624c5472c" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_IntercompanyChargesForServices" xlink:label="loc_gbci_IntercompanyChargesForServices_957ef4ab-1a7f-73ff-0a61-7598242bf3d3" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_33f76b65-31cf-be04-0849-25af345446d5" xlink:to="loc_gbci_IntercompanyChargesForServices_957ef4ab-1a7f-73ff-0a61-7598242bf3d3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfSecuritiesNet" xlink:label="loc_us-gaap_GainLossOnSaleOfSecuritiesNet_6798b2b8-2a12-21fe-9e3a-22ffb8e8a140" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_33f76b65-31cf-be04-0849-25af345446d5" xlink:to="loc_us-gaap_GainLossOnSaleOfSecuritiesNet_6798b2b8-2a12-21fe-9e3a-22ffb8e8a140" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoninterestExpense" xlink:label="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_EarningsBeforeIncomeTaxBenefitAndEquityInUndistributedEarningsOfSubsidiaries_75c72974-7e0d-c012-cfdf-759824783ff2" xlink:to="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_IncomeBeforeEquityInUndistributedEarningsOfSubsidiaries_151b3f45-cc69-b58e-63c7-75982256b7f5" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_SubsidiaryIncomeInExcessOfLessThanDividendsDistributed" xlink:label="loc_gbci_SubsidiaryIncomeInExcessOfLessThanDividendsDistributed_1670023b-8670-b491-5f4a-7598248ceead" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:to="loc_gbci_SubsidiaryIncomeInExcessOfLessThanDividendsDistributed_1670023b-8670-b491-5f4a-7598248ceead" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ConsiderationTransferredIdentifiableNetAssetsAcquiredAndGoodwillRecognizedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_e66eb458-8500-fc68-5c5a-c52959376fd5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_920f422e-1374-af55-c08e-afb11056448e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_e66eb458-8500-fc68-5c5a-c52959376fd5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_920f422e-1374-af55-c08e-afb11056448e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_5a23735a-10c2-64f7-3d5a-453792d1607d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_920f422e-1374-af55-c08e-afb11056448e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_5a23735a-10c2-64f7-3d5a-453792d1607d" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedMarketableSecurities" xlink:label="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedMarketableSecurities_fe116462-9361-6f7d-fcd8-7593f452bfa6" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_920f422e-1374-af55-c08e-afb11056448e" xlink:to="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedMarketableSecurities_fe116462-9361-6f7d-fcd8-7593f452bfa6" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLoansReceivable" xlink:label="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLoansReceivable_ea1e5599-8956-f6a0-1ead-7593f492516e" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_920f422e-1374-af55-c08e-afb11056448e" xlink:to="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedLoansReceivable_ea1e5599-8956-f6a0-1ead-7593f492516e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_72cc2501-68a2-887c-26e3-e18106a6e94e" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_920f422e-1374-af55-c08e-afb11056448e" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_72cc2501-68a2-887c-26e3-e18106a6e94e" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssets" xlink:label="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssets_94856c0e-5986-2313-2381-7593f43f25a0" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_920f422e-1374-af55-c08e-afb11056448e" xlink:to="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherAssets_94856c0e-5986-2313-2381-7593f43f25a0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_534c4147-6a9f-f763-f45b-0d025f929de9" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_e66eb458-8500-fc68-5c5a-c52959376fd5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_534c4147-6a9f-f763-f45b-0d025f929de9" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeposits" xlink:label="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeposits_58c22586-e7f5-7221-8632-7593f4bedf1c" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_534c4147-6a9f-f763-f45b-0d025f929de9" xlink:to="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeposits_58c22586-e7f5-7221-8632-7593f4bedf1c" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBorrowings" xlink:label="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBorrowings_09909975-8958-c099-e12b-7593f4734174" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_534c4147-6a9f-f763-f45b-0d025f929de9" xlink:to="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedBorrowings_09909975-8958-c099-e12b-7593f4734174" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLiabilities" xlink:label="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLiabilities_ccc411ea-4e0b-c45a-99d8-7593f43ea916" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_534c4147-6a9f-f763-f45b-0d025f929de9" xlink:to="loc_gbci_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherLiabilities_ccc411ea-4e0b-c45a-99d8-7593f43ea916" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_ca4e9616-e6c5-3909-8bbd-9acc52adbb44" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_ea8752b2-b718-0d36-9c9d-6fccc14feb02" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_ca4e9616-e6c5-3909-8bbd-9acc52adbb44" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable_ea8752b2-b718-0d36-9c9d-6fccc14feb02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_bc66fcc7-4638-7e93-2948-b833e774a337" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationConsiderationTransferred1_ca4e9616-e6c5-3909-8bbd-9acc52adbb44" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_bc66fcc7-4638-7e93-2948-b833e774a337" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_f83012ff-4665-44b7-9890-36c032a5cd11" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_f83012ff-4665-44b7-9890-36c032a5cd11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_b49c7a2f-2986-824d-e7cb-bc082ac0e888" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_b49c7a2f-2986-824d-e7cb-bc082ac0e888" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_15394837-f38b-15ac-34b9-3c880d46492b" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_15394837-f38b-15ac-34b9-3c880d46492b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_0de8de13-3824-9d0d-a270-12d0f2fbdb58" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_0de8de13-3824-9d0d-a270-12d0f2fbdb58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireHeldToMaturitySecurities" xlink:label="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_3a5a60fd-6807-00fa-b758-39b7b6e16f8a" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_PaymentsToAcquireHeldToMaturitySecurities_3a5a60fd-6807-00fa-b758-39b7b6e16f8a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1" xlink:label="loc_us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1_8ad5ecd9-a7b7-31dc-7ff1-f50d09c112f3" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_ProceedsFromLoanAndLeaseOriginationsAndPrincipalCollections1_8ad5ecd9-a7b7-31dc-7ff1-f50d09c112f3" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_PaymentsForLoansOriginatedOrAcquired" xlink:label="loc_gbci_PaymentsForLoansOriginatedOrAcquired_de503f6c-99a6-7644-c946-7593f4cef23d" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_gbci_PaymentsForLoansOriginatedOrAcquired_de503f6c-99a6-7644-c946-7593f4cef23d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForProceedsFromProductiveAssets" xlink:label="loc_us-gaap_PaymentsForProceedsFromProductiveAssets_57375985-43e7-7ca6-9fed-64b09729b579" xlink:type="locator" />
    <link:calculationArc order="8" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_PaymentsForProceedsFromProductiveAssets_57375985-43e7-7ca6-9fed-64b09729b579" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans" xlink:label="loc_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_bf51d1f1-b7b4-0372-bef2-4021936ab53d" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans_bf51d1f1-b7b4-0372-bef2-4021936ab53d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock" xlink:label="loc_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_b6bb9d4e-e81c-ca3d-da96-d93a60189548" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_ProceedsFromSaleOfFederalHomeLoanBankStock_b6bb9d4e-e81c-ca3d-da96-d93a60189548" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireFederalHomeLoanBankStock" xlink:label="loc_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_648076ed-0417-d835-41b7-f9099ded5b47" xlink:type="locator" />
    <link:calculationArc order="11" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_PaymentsToAcquireFederalHomeLoanBankStock_648076ed-0417-d835-41b7-f9099ded5b47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromLifeInsurancePolicies" xlink:label="loc_us-gaap_ProceedsFromLifeInsurancePolicies_79fe8788-4a03-b513-f62b-72928d6220f7" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_ProceedsFromLifeInsurancePolicies_79fe8788-4a03-b513-f62b-72928d6220f7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireOtherInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireOtherInvestments_197915f7-be4a-7489-7a63-0586d02cfc0f" xlink:type="locator" />
    <link:calculationArc order="13" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_us-gaap_PaymentsToAcquireOtherInvestments_197915f7-be4a-7489-7a63-0586d02cfc0f" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_NetCashReceivedPaidForAcquisitionOfBanks" xlink:label="loc_gbci_NetCashReceivedPaidForAcquisitionOfBanks_46efde3a-34a3-4053-52b8-7593f46b4cdd" xlink:type="locator" />
    <link:calculationArc order="14" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_70319186-e7bd-7189-88d2-eba26fb93350" xlink:to="loc_gbci_NetCashReceivedPaidForAcquisitionOfBanks_46efde3a-34a3-4053-52b8-7593f46b4cdd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_799beb73-6e78-0a93-6fd0-dad975c6869a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_799beb73-6e78-0a93-6fd0-dad975c6869a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_ee12cc29-63c9-040c-19f2-17921f90c9bb" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_ee12cc29-63c9-040c-19f2-17921f90c9bb" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_AccretionAmortizationofDiscountsandPremiumsBusinessCombinations" xlink:label="loc_gbci_AccretionAmortizationofDiscountsandPremiumsBusinessCombinations_7a7a5980-29d0-a2cd-9f8e-7593f45eb868" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_gbci_AccretionAmortizationofDiscountsandPremiumsBusinessCombinations_7a7a5980-29d0-a2cd-9f8e-7593f45eb868" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_88999971-796e-a544-2b43-0669ab932f8e" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_88999971-796e-a544-2b43-0669ab932f8e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale" xlink:label="loc_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_0c6f468a-14de-2a40-17e8-e30dc0cdc175" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_PaymentsForOriginationAndPurchasesOfLoansHeldForSale_0c6f468a-14de-2a40-17e8-e30dc0cdc175" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale" xlink:label="loc_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_5caba4b5-7782-7990-af1d-b2b244c684d5" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_ProceedsFromSaleOfMortgageLoansHeldForSale_5caba4b5-7782-7990-af1d-b2b244c684d5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSalesOfLoansNet" xlink:label="loc_us-gaap_GainLossOnSalesOfLoansNet_ea91341e-361d-c0f7-cf49-b928bb2b8c92" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_GainLossOnSalesOfLoansNet_ea91341e-361d-c0f7-cf49-b928bb2b8c92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfSecuritiesNet" xlink:label="loc_us-gaap_GainLossOnSaleOfSecuritiesNet_6798b2b8-2a12-21fe-9e3a-22ffb8e8a140" xlink:type="locator" />
    <link:calculationArc order="8" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_GainLossOnSaleOfSecuritiesNet_6798b2b8-2a12-21fe-9e3a-22ffb8e8a140" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue" xlink:label="loc_us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue_5502a2de-1021-7201-8aca-d64cc487c8aa" xlink:type="locator" />
    <link:calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue_5502a2de-1021-7201-8aca-d64cc487c8aa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_e3eecf87-b290-4567-8a59-5b0a8e27c85b" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_ShareBasedCompensation_e3eecf87-b290-4567-8a59-5b0a8e27c85b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationNonproduction" xlink:label="loc_us-gaap_DepreciationNonproduction_6bae891f-b508-29a2-cc15-100bb8b0ae11" xlink:type="locator" />
    <link:calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_DepreciationNonproduction_6bae891f-b508-29a2-cc15-100bb8b0ae11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainsLossesOnSalesOfOtherRealEstate" xlink:label="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_64e6ffc2-2e49-1f95-1346-70fd1dbe1fe6" xlink:type="locator" />
    <link:calculationArc order="12" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_GainsLossesOnSalesOfOtherRealEstate_64e6ffc2-2e49-1f95-1346-70fd1dbe1fe6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_ae796c5c-1c01-d654-6a3c-3b5dd2c89517" xlink:type="locator" />
    <link:calculationArc order="13" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_ae796c5c-1c01-d654-6a3c-3b5dd2c89517" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:type="locator" />
    <link:calculationArc order="14" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_VariableInterestEntitiesInvestmentAmortization" xlink:label="loc_gbci_VariableInterestEntitiesInvestmentAmortization_9d6aff1c-0289-18be-c2c4-7593f4963a1b" xlink:type="locator" />
    <link:calculationArc order="15" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_gbci_VariableInterestEntitiesInvestmentAmortization_9d6aff1c-0289-18be-c2c4-7593f4963a1b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_1fdda9a8-1ac6-b4f1-d104-6808da93dbe1" xlink:type="locator" />
    <link:calculationArc order="16" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_1fdda9a8-1ac6-b4f1-d104-6808da93dbe1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_ac9066b4-6e40-13ed-8628-1a20304926d8" xlink:type="locator" />
    <link:calculationArc order="17" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_ac9066b4-6e40-13ed-8628-1a20304926d8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_7c9b8031-2c89-2c7f-60e7-6af976eb8a29" xlink:type="locator" />
    <link:calculationArc order="18" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_IncreaseDecreaseInInterestPayableNet_7c9b8031-2c89-2c7f-60e7-6af976eb8a29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7e3bb724-19f9-7fc7-d3fb-60f34a11e15a" xlink:type="locator" />
    <link:calculationArc order="19" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_7e3bb724-19f9-7fc7-d3fb-60f34a11e15a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:type="locator" />
    <link:calculationArc order="20" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_444b1ac7-f47a-4ce3-0caa-537f7e4ab8c3" xlink:to="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInDeposits" xlink:label="loc_us-gaap_IncreaseDecreaseInDeposits_01379495-f364-e017-eca1-552db0d80389" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_IncreaseDecreaseInDeposits_01379495-f364-e017-eca1-552db0d80389" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase" xlink:label="loc_us-gaap_ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase_3b319776-dc22-5de7-c964-b474c30d6775" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase_3b319776-dc22-5de7-c964-b474c30d6775" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_ProceedsfromPaymentsforShortTermFederalHomeLoanBankAdvances" xlink:label="loc_gbci_ProceedsfromPaymentsforShortTermFederalHomeLoanBankAdvances_a07fccbd-e1f5-3684-e3d6-7593f48d688c" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_gbci_ProceedsfromPaymentsforShortTermFederalHomeLoanBankAdvances_a07fccbd-e1f5-3684-e3d6-7593f48d688c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromFederalHomeLoanBankBorrowings" xlink:label="loc_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_37d13aa7-6807-8ee0-dc1c-525490e4445e" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_ProceedsFromFederalHomeLoanBankBorrowings_37d13aa7-6807-8ee0-dc1c-525490e4445e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings" xlink:label="loc_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_13b009f3-3eda-4479-524d-2711dfe256e7" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_RepaymentsOfFederalHomeLoanBankBorrowings_13b009f3-3eda-4479-524d-2711dfe256e7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfOtherDebt" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfOtherDebt_cd3f4d73-fd06-3005-444e-9cc13020d2b4" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfOtherDebt_cd3f4d73-fd06-3005-444e-9cc13020d2b4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_6f80ca9e-82d0-f056-a403-c4914c1ce379" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_6f80ca9e-82d0-f056-a403-c4914c1ce379" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_6d67f644-e190-e5ce-9449-e00a27ad7771" xlink:type="locator" />
    <link:calculationArc order="8" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_deb49b68-c030-7624-a39d-ea301caa5dbf" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_6d67f644-e190-e5ce-9449-e00a27ad7771" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfChangesInStockholdersEquity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfFinancialCondition" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashCashEquivalentsAndFederalFundsSold" xlink:label="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_4a5e2607-4ba0-5cff-acd9-0dbf896894d7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_4a5e2607-4ba0-5cff-acd9-0dbf896894d7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndDueFromBanks" xlink:label="loc_us-gaap_CashAndDueFromBanks_6ea59cdf-420f-0221-a162-87e84408dc3b" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_4a5e2607-4ba0-5cff-acd9-0dbf896894d7" xlink:to="loc_us-gaap_CashAndDueFromBanks_6ea59cdf-420f-0221-a162-87e84408dc3b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestBearingDepositsInBanks" xlink:label="loc_us-gaap_InterestBearingDepositsInBanks_75c23f4c-57d7-1642-0f06-8805879e7b8d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsAndFederalFundsSold_4a5e2607-4ba0-5cff-acd9-0dbf896894d7" xlink:to="loc_us-gaap_InterestBearingDepositsInBanks_75c23f4c-57d7-1642-0f06-8805879e7b8d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MarketableSecurities" xlink:label="loc_us-gaap_MarketableSecurities_0d154ccf-16d7-119e-242d-5812d663fbd1" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_MarketableSecurities_0d154ccf-16d7-119e-242d-5812d663fbd1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_d444402b-921b-e0fa-119c-908ab66850af" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_MarketableSecurities_0d154ccf-16d7-119e-242d-5812d663fbd1" xlink:to="loc_us-gaap_AvailableForSaleSecurities_d444402b-921b-e0fa-119c-908ab66850af" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecurities" xlink:label="loc_us-gaap_HeldToMaturitySecurities_3bb8bc81-af51-9945-0a22-cc4527e07a17" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_MarketableSecurities_0d154ccf-16d7-119e-242d-5812d663fbd1" xlink:to="loc_us-gaap_HeldToMaturitySecurities_3bb8bc81-af51-9945-0a22-cc4527e07a17" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup" xlink:label="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_42786bb9-6e3c-6b98-ae1f-cfea111c0df9" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_LoansReceivableHeldForSaleNetNotPartOfDisposalGroup_42786bb9-6e3c-6b98-ae1f-cfea111c0df9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetReportedAmount" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8aea15c4-5727-d9d4-717f-630ed8fbfd83" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8aea15c4-5727-d9d4-717f-630ed8fbfd83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_99b7c0b8-78d1-c66a-eb0a-fb20f225718b" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8aea15c4-5727-d9d4-717f-630ed8fbfd83" xlink:to="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_99b7c0b8-78d1-c66a-eb0a-fb20f225718b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowance" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowance_8e1c2ae9-243e-baf4-cc90-3e520d158505" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetReportedAmount_8aea15c4-5727-d9d4-717f-630ed8fbfd83" xlink:to="loc_us-gaap_LoansAndLeasesReceivableAllowance_8e1c2ae9-243e-baf4-cc90-3e520d158505" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_1944a381-5c4e-ce3c-9111-13ccd1c639db" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_1944a381-5c4e-ce3c-9111-13ccd1c639db" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherRealEstateAndForeclosedAssets" xlink:label="loc_us-gaap_OtherRealEstateAndForeclosedAssets_981e6fe7-fa32-4b68-a956-d14acea056c4" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_OtherRealEstateAndForeclosedAssets_981e6fe7-fa32-4b68-a956-d14acea056c4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestReceivable" xlink:label="loc_us-gaap_InterestReceivable_2d49e658-e313-42db-0685-6fab7f379214" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_InterestReceivable_2d49e658-e313-42db-0685-6fab7f379214" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_0c301281-b140-dfcb-9991-ae503484f9da" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_0c301281-b140-dfcb-9991-ae503484f9da" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_49187b45-82fd-7060-b114-79ff249a4331" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_49187b45-82fd-7060-b114-79ff249a4331" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_93a64cae-271a-5e6b-8c83-5adf9f941142" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_Goodwill_93a64cae-271a-5e6b-8c83-5adf9f941142" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_NonmarketableSecuritiesEquitySecurities" xlink:label="loc_gbci_NonmarketableSecuritiesEquitySecurities_2e29a1ca-77e0-3df9-55db-7593f4894db0" xlink:type="locator" />
    <link:calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_gbci_NonmarketableSecuritiesEquitySecurities_2e29a1ca-77e0-3df9-55db-7593f4894db0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssets" xlink:label="loc_us-gaap_OtherAssets_cb56b01f-b9c5-ca9e-8988-e23b27fc7a20" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_c6057b1d-6685-8249-2051-6c57f3a16a9e" xlink:to="loc_us-gaap_OtherAssets_cb56b01f-b9c5-ca9e-8988-e23b27fc7a20" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_159dcb00-b17e-17db-7098-be4159799459" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_d8bb821f-d155-9d4e-1738-736b4bf4cb19" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_159dcb00-b17e-17db-7098-be4159799459" xlink:to="loc_us-gaap_Liabilities_d8bb821f-d155-9d4e-1738-736b4bf4cb19" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoninterestBearingDepositLiabilities" xlink:label="loc_us-gaap_NoninterestBearingDepositLiabilities_bd883c76-dce0-8aaf-554a-8adc97b467c6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d8bb821f-d155-9d4e-1738-736b4bf4cb19" xlink:to="loc_us-gaap_NoninterestBearingDepositLiabilities_bd883c76-dce0-8aaf-554a-8adc97b467c6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestBearingDepositLiabilities" xlink:label="loc_us-gaap_InterestBearingDepositLiabilities_03a04562-5601-ae4a-858b-4b7609367170" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d8bb821f-d155-9d4e-1738-736b4bf4cb19" xlink:to="loc_us-gaap_InterestBearingDepositLiabilities_03a04562-5601-ae4a-858b-4b7609367170" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SecuritiesSoldUnderAgreementsToRepurchase" xlink:label="loc_us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_a946e4ce-7166-7dab-bab5-a6a17afe3ca5" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d8bb821f-d155-9d4e-1738-736b4bf4cb19" xlink:to="loc_us-gaap_SecuritiesSoldUnderAgreementsToRepurchase_a946e4ce-7166-7dab-bab5-a6a17afe3ca5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdvancesFromFederalHomeLoanBanks" xlink:label="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_7b05fc35-5f84-3c6c-c727-bb89aa8ceb66" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d8bb821f-d155-9d4e-1738-736b4bf4cb19" xlink:to="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_7b05fc35-5f84-3c6c-c727-bb89aa8ceb66" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherBorrowings" xlink:label="loc_us-gaap_OtherBorrowings_7572d1f4-b3e7-4687-c7c0-d868ebab6244" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d8bb821f-d155-9d4e-1738-736b4bf4cb19" xlink:to="loc_us-gaap_OtherBorrowings_7572d1f4-b3e7-4687-c7c0-d868ebab6244" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust" xlink:label="loc_us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust_35612f75-a1f6-36cc-3379-14826f64d5f2" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d8bb821f-d155-9d4e-1738-736b4bf4cb19" xlink:to="loc_us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust_35612f75-a1f6-36cc-3379-14826f64d5f2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent_a7087e54-2e76-1fb3-28c5-a146449cbcf0" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d8bb821f-d155-9d4e-1738-736b4bf4cb19" xlink:to="loc_us-gaap_InterestPayableCurrentAndNoncurrent_a7087e54-2e76-1fb3-28c5-a146449cbcf0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherLiabilities" xlink:label="loc_us-gaap_OtherLiabilities_81d717e1-3e46-8423-3e5f-d98aacc74856" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_d8bb821f-d155-9d4e-1738-736b4bf4cb19" xlink:to="loc_us-gaap_OtherLiabilities_81d717e1-3e46-8423-3e5f-d98aacc74856" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_159dcb00-b17e-17db-7098-be4159799459" xlink:to="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_4fb6195d-d905-dac7-e5a0-79f324993f79" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:to="loc_us-gaap_PreferredStockValue_4fb6195d-d905-dac7-e5a0-79f324993f79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockValueOutstanding" xlink:label="loc_us-gaap_CommonStockValueOutstanding_84f35893-355e-0c6f-c67d-2f363beeac9a" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:to="loc_us-gaap_CommonStockValueOutstanding_84f35893-355e-0c6f-c67d-2f363beeac9a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_41895068-9590-2880-73df-521995865843" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_41895068-9590-2880-73df-521995865843" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_065cb284-7fca-cc9b-5752-2feaf74d0011" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_065cb284-7fca-cc9b-5752-2feaf74d0011" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_04f0961a-a0bc-88cf-6658-3f950da4a458" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_4b158f76-5f04-5e4d-ead3-d80e1f9943db" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_04f0961a-a0bc-88cf-6658-3f950da4a458" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfFinancialConditionParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss" xlink:label="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_4b7a9f96-e361-95dc-567f-7c30db8e2c0d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:to="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_4b7a9f96-e361-95dc-567f-7c30db8e2c0d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_799beb73-6e78-0a93-6fd0-dad975c6869a" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_4b7a9f96-e361-95dc-567f-7c30db8e2c0d" xlink:to="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_799beb73-6e78-0a93-6fd0-dad975c6869a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_1df5100d-c7c3-27c8-1405-81abbd3827e1" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_4b7a9f96-e361-95dc-567f-7c30db8e2c0d" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_1df5100d-c7c3-27c8-1405-81abbd3827e1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestAndDividendIncomeOperating" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_4477516e-3843-f1b4-8a61-de669ff8f0e0" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_1df5100d-c7c3-27c8-1405-81abbd3827e1" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperating_4477516e-3843-f1b4-8a61-de669ff8f0e0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansConsumerRealEstate" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansConsumerRealEstate_f03fe96d-e911-80da-eae3-e13c00544989" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_4477516e-3843-f1b4-8a61-de669ff8f0e0" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansConsumerRealEstate_f03fe96d-e911-80da-eae3-e13c00544989" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansCommercial" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansCommercial_f500cc9e-a76f-12d1-a219-ce153cedc9ba" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_4477516e-3843-f1b4-8a61-de669ff8f0e0" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansCommercial_f500cc9e-a76f-12d1-a219-ce153cedc9ba" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestAndFeeIncomeLoansOtherConsumer" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansOtherConsumer_f3a44640-adb7-81d4-8e51-c077f6b52fdc" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_4477516e-3843-f1b4-8a61-de669ff8f0e0" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansOtherConsumer_f3a44640-adb7-81d4-8e51-c077f6b52fdc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestAndDividendIncomeSecurities" xlink:label="loc_us-gaap_InterestAndDividendIncomeSecurities_1829174e-cfff-643a-37e6-4fac48f6d3ea" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperating_4477516e-3843-f1b4-8a61-de669ff8f0e0" xlink:to="loc_us-gaap_InterestAndDividendIncomeSecurities_1829174e-cfff-643a-37e6-4fac48f6d3ea" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_7c9599ab-2a77-022c-c720-63fecff6a62c" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestIncomeExpenseNet_1df5100d-c7c3-27c8-1405-81abbd3827e1" xlink:to="loc_us-gaap_InterestExpense_7c9599ab-2a77-022c-c720-63fecff6a62c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpenseDeposits" xlink:label="loc_us-gaap_InterestExpenseDeposits_1b3f3aad-0663-6434-2e85-258ef2ba8cf4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_7c9599ab-2a77-022c-c720-63fecff6a62c" xlink:to="loc_us-gaap_InterestExpenseDeposits_1b3f3aad-0663-6434-2e85-258ef2ba8cf4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase" xlink:label="loc_us-gaap_InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase_1e853d50-c49c-9858-0e6a-d99db5ab1790" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_7c9599ab-2a77-022c-c720-63fecff6a62c" xlink:to="loc_us-gaap_InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase_1e853d50-c49c-9858-0e6a-d99db5ab1790" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_InterestExpenseFederalHomeLoanBankAdvance" xlink:label="loc_gbci_InterestExpenseFederalHomeLoanBankAdvance_6b60ba9d-dc9c-434d-7024-7593f4976a26" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_7c9599ab-2a77-022c-c720-63fecff6a62c" xlink:to="loc_gbci_InterestExpenseFederalHomeLoanBankAdvance_6b60ba9d-dc9c-434d-7024-7593f4976a26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpenseOther" xlink:label="loc_us-gaap_InterestExpenseOther_117e1571-92a0-84b3-4226-5d3d3e37bddf" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_7c9599ab-2a77-022c-c720-63fecff6a62c" xlink:to="loc_us-gaap_InterestExpenseOther_117e1571-92a0-84b3-4226-5d3d3e37bddf" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpenseJuniorSubordinatedDebentures" xlink:label="loc_us-gaap_InterestExpenseJuniorSubordinatedDebentures_9d5f4bc8-0310-e583-173b-7e78329b5081" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InterestExpense_7c9599ab-2a77-022c-c720-63fecff6a62c" xlink:to="loc_us-gaap_InterestExpenseJuniorSubordinatedDebentures_9d5f4bc8-0310-e583-173b-7e78329b5081" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoninterestIncome" xlink:label="loc_us-gaap_NoninterestIncome_85d8e349-2d49-3422-00b4-05065a60f6f9" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:to="loc_us-gaap_NoninterestIncome_85d8e349-2d49-3422-00b4-05065a60f6f9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FeesAndCommissionsOther" xlink:label="loc_us-gaap_FeesAndCommissionsOther_66ef45b2-a5a1-9a12-6f4a-0e048b4e6c08" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_85d8e349-2d49-3422-00b4-05065a60f6f9" xlink:to="loc_us-gaap_FeesAndCommissionsOther_66ef45b2-a5a1-9a12-6f4a-0e048b4e6c08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FeesAndCommissionsDepositorAccounts" xlink:label="loc_us-gaap_FeesAndCommissionsDepositorAccounts_a4fbc5df-70a9-e2bd-ec71-0fe6359f2eee" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_85d8e349-2d49-3422-00b4-05065a60f6f9" xlink:to="loc_us-gaap_FeesAndCommissionsDepositorAccounts_a4fbc5df-70a9-e2bd-ec71-0fe6359f2eee" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSalesOfLoansNet" xlink:label="loc_us-gaap_GainLossOnSalesOfLoansNet_ea91341e-361d-c0f7-cf49-b928bb2b8c92" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_85d8e349-2d49-3422-00b4-05065a60f6f9" xlink:to="loc_us-gaap_GainLossOnSalesOfLoansNet_ea91341e-361d-c0f7-cf49-b928bb2b8c92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfSecuritiesNet" xlink:label="loc_us-gaap_GainLossOnSaleOfSecuritiesNet_6798b2b8-2a12-21fe-9e3a-22ffb8e8a140" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_85d8e349-2d49-3422-00b4-05065a60f6f9" xlink:to="loc_us-gaap_GainLossOnSaleOfSecuritiesNet_6798b2b8-2a12-21fe-9e3a-22ffb8e8a140" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoninterestIncomeOtherOperatingIncome" xlink:label="loc_us-gaap_NoninterestIncomeOtherOperatingIncome_bbc2d8f2-839a-169c-6677-9e1bd2a87a11" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestIncome_85d8e349-2d49-3422-00b4-05065a60f6f9" xlink:to="loc_us-gaap_NoninterestIncomeOtherOperatingIncome_bbc2d8f2-839a-169c-6677-9e1bd2a87a11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoninterestExpense" xlink:label="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_0eb47183-f513-314d-ceda-ee2412d9eee8" xlink:to="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeclosedRealEstateExpense" xlink:label="loc_us-gaap_ForeclosedRealEstateExpense_79506dd2-3fe6-218c-a401-af0073b416b0" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:to="loc_us-gaap_ForeclosedRealEstateExpense_79506dd2-3fe6-218c-a401-af0073b416b0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LaborAndRelatedExpense" xlink:label="loc_us-gaap_LaborAndRelatedExpense_f279d790-3f69-6bb0-bf56-02597d072677" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:to="loc_us-gaap_LaborAndRelatedExpense_f279d790-3f69-6bb0-bf56-02597d072677" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OccupancyNet" xlink:label="loc_us-gaap_OccupancyNet_dcfa93d8-21b7-f135-13ea-2a15d58dda33" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:to="loc_us-gaap_OccupancyNet_dcfa93d8-21b7-f135-13ea-2a15d58dda33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdvertisingExpense" xlink:label="loc_us-gaap_AdvertisingExpense_fb1fb322-643b-e476-bb08-70583a2415d6" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:to="loc_us-gaap_AdvertisingExpense_fb1fb322-643b-e476-bb08-70583a2415d6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InformationTechnologyAndDataProcessing" xlink:label="loc_us-gaap_InformationTechnologyAndDataProcessing_362f9a0f-7f2d-746c-6a38-3815f0270d4b" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:to="loc_us-gaap_InformationTechnologyAndDataProcessing_362f9a0f-7f2d-746c-6a38-3815f0270d4b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_ae796c5c-1c01-d654-6a3c-3b5dd2c89517" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_ae796c5c-1c01-d654-6a3c-3b5dd2c89517" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_GeneralInsuranceandFederalDepositInsuranceCorporationPremiumExpense" xlink:label="loc_gbci_GeneralInsuranceandFederalDepositInsuranceCorporationPremiumExpense_f6333217-d174-43cc-b247-7593f468dcdf" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:to="loc_gbci_GeneralInsuranceandFederalDepositInsuranceCorporationPremiumExpense_f6333217-d174-43cc-b247-7593f468dcdf" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNoninterestExpense" xlink:label="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NoninterestExpense_b9eb1ceb-6771-3351-1281-e8b3cd4f24bc" xlink:to="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ConsolidatedStatementsOfStockholdersEquityParenthetical" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ContingenciesAndCommitments" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ContingenciesAndCommitmentsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ContingenciesAndCommitmentsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/DeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_b361a033-37cf-a2bc-6e1f-0297b90aa5a9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_40f9cbe3-f1cd-d4d3-e7be-f62e64714b00" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_b361a033-37cf-a2bc-6e1f-0297b90aa5a9" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_40f9cbe3-f1cd-d4d3-e7be-f62e64714b00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation_b83ae405-2db3-2611-a552-535d0f152906" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_40f9cbe3-f1cd-d4d3-e7be-f62e64714b00" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation_b83ae405-2db3-2611-a552-535d0f152906" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_3541201a-a025-b00d-aec1-2cb167bdef44" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_40f9cbe3-f1cd-d4d3-e7be-f62e64714b00" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_3541201a-a025-b00d-aec1-2cb167bdef44" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_DeferredTaxAssetsOtherRealEstateOwned" xlink:label="loc_gbci_DeferredTaxAssetsOtherRealEstateOwned_30ee2e03-4b80-0a15-a54f-75982418ff42" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_40f9cbe3-f1cd-d4d3-e7be-f62e64714b00" xlink:to="loc_gbci_DeferredTaxAssetsOtherRealEstateOwned_30ee2e03-4b80-0a15-a54f-75982418ff42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsDerivativeInstruments" xlink:label="loc_us-gaap_DeferredTaxAssetsDerivativeInstruments_9eb5b688-03ee-a9e0-4a88-d0be171d4af0" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_40f9cbe3-f1cd-d4d3-e7be-f62e64714b00" xlink:to="loc_us-gaap_DeferredTaxAssetsDerivativeInstruments_9eb5b688-03ee-a9e0-4a88-d0be171d4af0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_34825a29-f08a-602c-93b3-eaaa9098ff88" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_40f9cbe3-f1cd-d4d3-e7be-f62e64714b00" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses_34825a29-f08a-602c-93b3-eaaa9098ff88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_abd291fc-e1d7-7f11-bf97-282dd971e314" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_40f9cbe3-f1cd-d4d3-e7be-f62e64714b00" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits_abd291fc-e1d7-7f11-bf97-282dd971e314" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_91623f44-5f42-408a-f7b7-7a4698afab83" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_40f9cbe3-f1cd-d4d3-e7be-f62e64714b00" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_91623f44-5f42-408a-f7b7-7a4698afab83" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_DeferredTaxAssetsFairMarketValueAdjustmentsfromAcquisitions" xlink:label="loc_gbci_DeferredTaxAssetsFairMarketValueAdjustmentsfromAcquisitions_4ec06788-47a7-6ecb-9e5e-759821dc49d9" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_40f9cbe3-f1cd-d4d3-e7be-f62e64714b00" xlink:to="loc_gbci_DeferredTaxAssetsFairMarketValueAdjustmentsfromAcquisitions_4ec06788-47a7-6ecb-9e5e-759821dc49d9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_b361a033-37cf-a2bc-6e1f-0297b90aa5a9" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome_441e8df4-1776-cab6-87c9-34cb95534e24" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome_441e8df4-1776-cab6-87c9-34cb95534e24" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_d1de4f5a-e70f-c355-7179-89a9064c7b88" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_d1de4f5a-e70f-c355-7179-89a9064c7b88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_dde5eeca-2b71-60e2-a05c-fb2f2f5703af" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_dde5eeca-2b71-60e2-a05c-fb2f2f5703af" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_DeferredTaxLiabilitiesStockDividends" xlink:label="loc_gbci_DeferredTaxLiabilitiesStockDividends_756d1b2b-d4c3-7431-38e3-759823c37845" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_gbci_DeferredTaxLiabilitiesStockDividends_756d1b2b-d4c3-7431-38e3-759823c37845" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome_2f047df9-737f-9585-7180-ff1d5d382498" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome_2f047df9-737f-9585-7180-ff1d5d382498" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_42c51b10-4b2a-7210-a10c-a5d92325199a" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpenseDeferredFinancingCosts_42c51b10-4b2a-7210-a10c-a5d92325199a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_40c7d4a7-f1a1-0c55-497e-f9a3bb09604c" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_bbf9fd06-b461-3f65-8882-6e322d99a60b" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_40c7d4a7-f1a1-0c55-497e-f9a3bb09604c" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/Deposits" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/DepositsDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/DepositsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivities" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivitiesDerivativesAndHedgingActivitiesDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivitiesInterestRateSwapGainsOrLossesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivitiesOffsettingAssetsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivitiesOffsettingLiabilitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/DerivativesAndHedgingActivitiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/EarningsPerShare" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/EarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_223fd9c8-68e8-e433-7c40-f98b238e79de" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_cee10fe8-a4bb-491c-22f6-69a723d6a718" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_223fd9c8-68e8-e433-7c40-f98b238e79de" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_cee10fe8-a4bb-491c-22f6-69a723d6a718" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_86e61cf2-b7b2-e230-65f1-5a2b152f3a30" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_223fd9c8-68e8-e433-7c40-f98b238e79de" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_86e61cf2-b7b2-e230-65f1-5a2b152f3a30" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/EarningsPerShareTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/EmployeeBenefitPlans" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/EmployeeBenefitPlansDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/FairValueMeasurementsDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/FairValueMeasurementsOnNonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_b86af6cd-ef38-8a02-5297-9329a99c960d" xlink:type="locator" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_OtherRealEstateOwnedFairValueDisclosure" xlink:label="loc_gbci_OtherRealEstateOwnedFairValueDisclosure_b8062f67-67b2-f60e-75b5-7593f4a67177" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_b86af6cd-ef38-8a02-5297-9329a99c960d" xlink:to="loc_gbci_OtherRealEstateOwnedFairValueDisclosure_b8062f67-67b2-f60e-75b5-7593f4a67177" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_CollateralDependentImpairedLoansOwnedFairValueDisclosure" xlink:label="loc_gbci_CollateralDependentImpairedLoansOwnedFairValueDisclosure_31d2e2f8-05f0-e102-b549-7593f4b17cdd" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_b86af6cd-ef38-8a02-5297-9329a99c960d" xlink:to="loc_gbci_CollateralDependentImpairedLoansOwnedFairValueDisclosure_31d2e2f8-05f0-e102-b549-7593f4b17cdd" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/FairValueMeasurementsOnRecurringBasisDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/FairValueOfAssetsAndLiabilities" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/FairValueOfAssetsAndLiabilitiesQuantitativeInformationAboutLevel3FairValueMeasurementsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/FairValueOfAssetsAndLiabilitiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/FederalAndStateIncomeTaxes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/FederalAndStateIncomeTaxesDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/FederalAndStateIncomeTaxesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/GainOrLossOnSaleOfInvestmentsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ImpairedLoansDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairedFinancingReceivableRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableRecordedInvestment_15a0be6e-6399-7796-5a21-351d6bdf38c0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_be7a8a02-ce08-c29c-f736-c19574a96602" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ImpairedFinancingReceivableRecordedInvestment_15a0be6e-6399-7796-5a21-351d6bdf38c0" xlink:to="loc_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment_be7a8a02-ce08-c29c-f736-c19574a96602" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_cc47adb0-1bde-8a7e-893c-e21dfd67fbcc" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ImpairedFinancingReceivableRecordedInvestment_15a0be6e-6399-7796-5a21-351d6bdf38c0" xlink:to="loc_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment_cc47adb0-1bde-8a7e-893c-e21dfd67fbcc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance" xlink:label="loc_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_ca37a9dd-c284-285c-ef7c-6fd13d2d1f07" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance" xlink:label="loc_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance_363cf147-7020-38c5-2ad2-e05d16e99e50" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_ca37a9dd-c284-285c-ef7c-6fd13d2d1f07" xlink:to="loc_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance_363cf147-7020-38c5-2ad2-e05d16e99e50" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance" xlink:label="loc_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance_6c5d17c5-8bf9-32e4-45d8-0c81f3d83e11" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance_ca37a9dd-c284-285c-ef7c-6fd13d2d1f07" xlink:to="loc_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance_6c5d17c5-8bf9-32e4-45d8-0c81f3d83e11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_26d01b6b-31e5-49ea-86b2-b00c93649ee1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment_e0e4c04b-a7cc-02ef-23f6-318ae3c05959" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_26d01b6b-31e5-49ea-86b2-b00c93649ee1" xlink:to="loc_us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment_e0e4c04b-a7cc-02ef-23f6-318ae3c05959" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment" xlink:label="loc_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment_6634bf7e-e8ef-60fa-1b4e-d64872870daa" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment_26d01b6b-31e5-49ea-86b2-b00c93649ee1" xlink:to="loc_us-gaap_ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment_6634bf7e-e8ef-60fa-1b4e-d64872870daa" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/InterestRateSwapSummaryDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/InvestmentSecurities" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/InvestmentSecuritiesDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/InvestmentSecuritiesInvestmentSecuritiesMaturityScheduleDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_11443c48-53c0-1d18-5b01-77cc4603ea56" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_764bcdd4-873e-b243-70d2-5e6b13e98cf7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_11443c48-53c0-1d18-5b01-77cc4603ea56" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_764bcdd4-873e-b243-70d2-5e6b13e98cf7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_e43ecc2e-e30d-adce-13de-ad342aacc705" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_11443c48-53c0-1d18-5b01-77cc4603ea56" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_e43ecc2e-e30d-adce-13de-ad342aacc705" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_32a10326-5fac-2d4e-ebe4-d0b3d261f0aa" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_11443c48-53c0-1d18-5b01-77cc4603ea56" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_32a10326-5fac-2d4e-ebe4-d0b3d261f0aa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_35f8f7f2-8f7e-5afd-f112-d64048dc0db3" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_11443c48-53c0-1d18-5b01-77cc4603ea56" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue_35f8f7f2-8f7e-5afd-f112-d64048dc0db3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_97fcea9d-3403-138a-673b-d3925babdf50" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost" xlink:label="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost_b9d6b22b-0e71-a39b-5f4e-3262bf72826c" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_97fcea9d-3403-138a-673b-d3925babdf50" xlink:to="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCost_b9d6b22b-0e71-a39b-5f4e-3262bf72826c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost" xlink:label="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost_600990f0-4a1e-bd9e-f9b3-d29987e6b8e4" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_97fcea9d-3403-138a-673b-d3925babdf50" xlink:to="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost_600990f0-4a1e-bd9e-f9b3-d29987e6b8e4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost" xlink:label="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost_e00ccf46-ab2e-cfbf-7a6c-5973ecb15338" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_97fcea9d-3403-138a-673b-d3925babdf50" xlink:to="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost_e00ccf46-ab2e-cfbf-7a6c-5973ecb15338" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost" xlink:label="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost_c805e673-2424-63dc-cf6e-62bd954453a2" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_97fcea9d-3403-138a-673b-d3925babdf50" xlink:to="loc_us-gaap_HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost_c805e673-2424-63dc-cf6e-62bd954453a2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_9b06f26d-21a9-b999-19f7-0121d26f1c4e" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_11845fde-86d7-5d4f-f95f-2ff0c69033cf" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_9b06f26d-21a9-b999-19f7-0121d26f1c4e" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue_11845fde-86d7-5d4f-f95f-2ff0c69033cf" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_bb8c0b1e-fd9f-a5c4-e603-c98e3365d87d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_9b06f26d-21a9-b999-19f7-0121d26f1c4e" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue_bb8c0b1e-fd9f-a5c4-e603-c98e3365d87d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_00f917b5-f7f5-5ac4-6c9e-e7da92e61db9" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_9b06f26d-21a9-b999-19f7-0121d26f1c4e" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue_00f917b5-f7f5-5ac4-6c9e-e7da92e61db9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_fb085eea-83ea-9ce6-514c-2e80a091553a" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue_9b06f26d-21a9-b999-19f7-0121d26f1c4e" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesDebtMaturitiesRollingAfterTenYearsFairValue_fb085eea-83ea-9ce6-514c-2e80a091553a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_57cac0ff-a80b-6c05-ff4c-4119fdd53473" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_e23e956e-6d3a-7b53-c662-14b8b922e4d7" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_57cac0ff-a80b-6c05-ff4c-4119fdd53473" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis_e23e956e-6d3a-7b53-c662-14b8b922e4d7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_036a6f5c-05ce-dc1a-9b58-e6338f89f0c1" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_57cac0ff-a80b-6c05-ff4c-4119fdd53473" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis_036a6f5c-05ce-dc1a-9b58-e6338f89f0c1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_06175534-8ac5-fc96-dd10-7102d5989d46" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_57cac0ff-a80b-6c05-ff4c-4119fdd53473" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis_06175534-8ac5-fc96-dd10-7102d5989d46" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_ddab5c86-f56d-2ebd-8d33-52d44342102a" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_57cac0ff-a80b-6c05-ff4c-4119fdd53473" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis_ddab5c86-f56d-2ebd-8d33-52d44342102a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_fc961581-2899-aa00-cc82-b67bd4267bb3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_ac973b63-1234-e9dc-6850-581bee09202d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_fc961581-2899-aa00-cc82-b67bd4267bb3" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_ac973b63-1234-e9dc-6850-581bee09202d" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/InvestmentSecuritiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/InvestmentsWithUnrealizedLossPositionDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_947ee1eb-a5d1-bf7e-cbaf-6cd320658e38" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_5591543c-e106-9160-fa18-4366844ee790" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_947ee1eb-a5d1-bf7e-cbaf-6cd320658e38" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_5591543c-e106-9160-fa18-4366844ee790" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_5a6ef725-4b6e-9e35-fba2-5b883d021434" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_947ee1eb-a5d1-bf7e-cbaf-6cd320658e38" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_5a6ef725-4b6e-9e35-fba2-5b883d021434" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_2e09f20d-7547-1a18-6f83-8a0ce6a75ae4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_aaf3e830-a5d9-ffa3-4995-c9e738f331db" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_2e09f20d-7547-1a18-6f83-8a0ce6a75ae4" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_aaf3e830-a5d9-ffa3-4995-c9e738f331db" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_80d8afbb-83ba-fc94-42ba-ea8166197445" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_2e09f20d-7547-1a18-6f83-8a0ce6a75ae4" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_80d8afbb-83ba-fc94-42ba-ea8166197445" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_ae410534-ff1f-afef-7c75-bbe62f56894d" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_4b9ba026-7273-0821-7d62-bb1019365c55" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_ae410534-ff1f-afef-7c75-bbe62f56894d" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_4b9ba026-7273-0821-7d62-bb1019365c55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" xlink:label="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_da993c7c-63f5-a242-9f8a-6e9d9ff288c6" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_ae410534-ff1f-afef-7c75-bbe62f56894d" xlink:to="loc_us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_da993c7c-63f5-a242-9f8a-6e9d9ff288c6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_00e7a94b-1ec9-6499-7f0a-2050ff159115" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_a1dd3f1b-4c24-2372-1a98-24b25891a665" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_00e7a94b-1ec9-6499-7f0a-2050ff159115" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_a1dd3f1b-4c24-2372-1a98-24b25891a665" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_7b1de9af-f23a-d7bf-8a2c-7efccf28ddba" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue_00e7a94b-1ec9-6499-7f0a-2050ff159115" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_7b1de9af-f23a-d7bf-8a2c-7efccf28ddba" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/LoansReceivableAgingAnalysisDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_99b7c0b8-78d1-c66a-eb0a-fb20f225718b" xlink:type="locator" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_FinancingReceivableRecordedInvestmentPastDueAndNonAccrualLoans" xlink:label="loc_gbci_FinancingReceivableRecordedInvestmentPastDueAndNonAccrualLoans_fd3a7636-914a-3e13-17be-7593f45001ea" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_99b7c0b8-78d1-c66a-eb0a-fb20f225718b" xlink:to="loc_gbci_FinancingReceivableRecordedInvestmentPastDueAndNonAccrualLoans_fd3a7636-914a-3e13-17be-7593f45001ea" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentCurrent" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_38a9b0f0-99cf-7bf1-a2e9-09df10077c91" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_99b7c0b8-78d1-c66a-eb0a-fb20f225718b" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentCurrent_38a9b0f0-99cf-7bf1-a2e9-09df10077c91" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/LoansReceivableNet" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/LoansReceivableNetAlllAndLoansReceivableSummaryDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome" xlink:label="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_99b7c0b8-78d1-c66a-eb0a-fb20f225718b" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment" xlink:label="loc_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_2728da51-6cce-af3e-5ce7-dffdc8662526" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_99b7c0b8-78d1-c66a-eb0a-fb20f225718b" xlink:to="loc_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_2728da51-6cce-af3e-5ce7-dffdc8662526" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment" xlink:label="loc_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_85116712-b047-8f0c-ec82-a503d282893f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome_99b7c0b8-78d1-c66a-eb0a-fb20f225718b" xlink:to="loc_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_85116712-b047-8f0c-ec82-a503d282893f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LoansAndLeasesReceivableAllowance" xlink:label="loc_us-gaap_LoansAndLeasesReceivableAllowance_8e1c2ae9-243e-baf4-cc90-3e520d158505" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_2d64eba2-d0e8-c45b-dd29-fc9458833902" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowance_8e1c2ae9-243e-baf4-cc90-3e520d158505" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_2d64eba2-d0e8-c45b-dd29-fc9458833902" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_aec103a3-1896-0ed9-655b-7cb3d159483f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LoansAndLeasesReceivableAllowance_8e1c2ae9-243e-baf4-cc90-3e520d158505" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_aec103a3-1896-0ed9-655b-7cb3d159483f" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/LoansReceivableNetDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/LoansReceivableNetSummaryOfLoansReceivableDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/LoansReceivableNetTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/MergersAndAcquisitions" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/MergersAndAcquisitionsDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/MergersAndAcquisitionsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/NatureOfOperationsAndSummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/NatureOfOperationsAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/NetCarryingValueOfCoreDepositIntangiblesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_49187b45-82fd-7060-b114-79ff249a4331" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_5d62e128-f1a1-954f-82e2-1936cb67d793" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_49187b45-82fd-7060-b114-79ff249a4331" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_5d62e128-f1a1-954f-82e2-1936cb67d793" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_c3ed8a56-abe0-6418-c541-e6b647d6318a" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_49187b45-82fd-7060-b114-79ff249a4331" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_c3ed8a56-abe0-6418-c541-e6b647d6318a" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/OtherExpenses" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/OtherExpensesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNoninterestExpense" xlink:label="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:type="locator" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_DebitCardExpense" xlink:label="loc_gbci_DebitCardExpense_c3e50dde-9514-27eb-937e-7593f4aec741" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_gbci_DebitCardExpense_c3e50dde-9514-27eb-937e-7593f4aec741" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_ConsultingFees" xlink:label="loc_gbci_ConsultingFees_95a11424-da71-056b-6c69-7593f4c26505" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_gbci_ConsultingFees_95a11424-da71-056b-6c69-7593f4c26505" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_TelephoneExpenses" xlink:label="loc_gbci_TelephoneExpenses_b18bf745-d641-456e-86ec-7593f4cc1e4a" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_gbci_TelephoneExpenses_b18bf745-d641-456e-86ec-7593f4cc1e4a" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_LoanRelatedExpenses" xlink:label="loc_gbci_LoanRelatedExpenses_ee6e3e45-e6b9-939a-0a8a-7593f49bff17" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_gbci_LoanRelatedExpenses_ee6e3e45-e6b9-939a-0a8a-7593f49bff17" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_MiscellaneousEmployeeExpenses" xlink:label="loc_gbci_MiscellaneousEmployeeExpenses_39e2430e-5c03-97ef-ad73-7593f4ca0146" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_gbci_MiscellaneousEmployeeExpenses_39e2430e-5c03-97ef-ad73-7593f4ca0146" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_DepositRelatedExpenses" xlink:label="loc_gbci_DepositRelatedExpenses_9f162377-6015-4114-56df-7593f4587d85" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_gbci_DepositRelatedExpenses_9f162377-6015-4114-56df-7593f4587d85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SuppliesExpense" xlink:label="loc_us-gaap_SuppliesExpense_911857c2-0ddc-7f68-ca5d-b63882106eef" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_us-gaap_SuppliesExpense_911857c2-0ddc-7f68-ca5d-b63882106eef" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PostageExpense" xlink:label="loc_us-gaap_PostageExpense_7484de21-a667-31b7-63cc-c2b298a675e9" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_us-gaap_PostageExpense_7484de21-a667-31b7-63cc-c2b298a675e9" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_VIEWritedownsLossesandOtherExpenses" xlink:label="loc_gbci_VIEWritedownsLossesandOtherExpenses_09302ea1-c1e9-34d2-888f-7593f455c6c2" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_gbci_VIEWritedownsLossesandOtherExpenses_09302ea1-c1e9-34d2-888f-7593f455c6c2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessDevelopment" xlink:label="loc_us-gaap_BusinessDevelopment_de129dae-d349-8c1e-0076-fffc6e576bd7" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_us-gaap_BusinessDevelopment_de129dae-d349-8c1e-0076-fffc6e576bd7" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_AccountingFees" xlink:label="loc_gbci_AccountingFees_4a8feb1c-b8d8-15c1-3fc6-7593f4b3f6b2" xlink:type="locator" />
    <link:calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_gbci_AccountingFees_4a8feb1c-b8d8-15c1-3fc6-7593f4b3f6b2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LegalFees" xlink:label="loc_us-gaap_LegalFees_6ac79f30-b57f-9157-69a7-32ec69b4094f" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_us-gaap_LegalFees_6ac79f30-b57f-9157-69a7-32ec69b4094f" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_ATMExpenses" xlink:label="loc_gbci_ATMExpenses_f129ed1c-dfde-e0b6-4034-7593f47f0a84" xlink:type="locator" />
    <link:calculationArc order="13" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_gbci_ATMExpenses_f129ed1c-dfde-e0b6-4034-7593f47f0a84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherCostAndExpenseOperating" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_b0184ecc-12ea-c485-85c0-5fa141798e88" xlink:type="locator" />
    <link:calculationArc order="14" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_b0184ecc-12ea-c485-85c0-5fa141798e88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_6bb31a22-5d72-9721-76bb-72efc45096a2" xlink:type="locator" />
    <link:calculationArc order="15" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherNoninterestExpense_02adc972-ee35-2b4e-07cf-dcb0252789fc" xlink:to="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_6bb31a22-5d72-9721-76bb-72efc45096a2" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/OtherExpensesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/OtherIntangibleAssetsAndGoodwill" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/OtherIntangibleAssetsAndGoodwillOtherIntangibleAssetsAndGoodwillDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/OtherIntangibleAssetsAndGoodwillTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ParentHoldingCompanyInformationCondensed" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ParentHoldingCompanyInformationCondensedTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/PremisesAndEquipment" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/PremisesAndEquipmentDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/PremisesAndEquipmentFutureMinimumRentalCommitmentsUnderOperatingAndCapitalLeasesDetails" xlink:type="extended">
    <link:loc xlink:href="gbci-20171231.xsd#gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDue" xlink:label="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDue_446bc52c-46e8-b83d-b728-759821f0e230" xlink:type="locator" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueCurrent_f6731305-dc72-bb99-ee21-759822c500be" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDue_446bc52c-46e8-b83d-b728-759821f0e230" xlink:to="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueCurrent_f6731305-dc72-bb99-ee21-759822c500be" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInTwoYears_8444882e-7e68-b8ce-dbf5-759824991ad4" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDue_446bc52c-46e8-b83d-b728-759821f0e230" xlink:to="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInTwoYears_8444882e-7e68-b8ce-dbf5-759824991ad4" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInThreeYears_02eb1f8b-e86f-d69c-6c1f-75982277c975" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDue_446bc52c-46e8-b83d-b728-759821f0e230" xlink:to="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInThreeYears_02eb1f8b-e86f-d69c-6c1f-75982277c975" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFourYears_18e070eb-65b3-fd4c-54a2-759824c3d128" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDue_446bc52c-46e8-b83d-b728-759821f0e230" xlink:to="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFourYears_18e070eb-65b3-fd4c-54a2-759824c3d128" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFiveYears_8ddb9ecc-fb47-99e3-6a85-75982494ca43" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDue_446bc52c-46e8-b83d-b728-759821f0e230" xlink:to="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFiveYears_8ddb9ecc-fb47-99e3-6a85-75982494ca43" xlink:type="arc" />
    <link:loc xlink:href="gbci-20171231.xsd#gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueThereafter_c7506c41-7045-252d-4d24-759820673da4" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDue_446bc52c-46e8-b83d-b728-759821f0e230" xlink:to="loc_gbci_OperatingAndCapitalLeasesFutureMinimumPaymentsDueThereafter_c7506c41-7045-252d-4d24-759820673da4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments_daf826cc-ddab-c5d4-b68e-bebddaaf3fd6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_d42a3dad-23e9-d83e-cd05-0b20e0cdbc1f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments_daf826cc-ddab-c5d4-b68e-bebddaaf3fd6" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_d42a3dad-23e9-d83e-cd05-0b20e0cdbc1f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_38694d24-9bde-3c85-0262-b82030d7e61a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_d42a3dad-23e9-d83e-cd05-0b20e0cdbc1f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_38694d24-9bde-3c85-0262-b82030d7e61a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_729f77b8-2a9e-0142-52d3-9a6513fc6787" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_d42a3dad-23e9-d83e-cd05-0b20e0cdbc1f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_729f77b8-2a9e-0142-52d3-9a6513fc6787" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_585c4efd-47a1-e7a2-64da-ace6ee154ecd" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_d42a3dad-23e9-d83e-cd05-0b20e0cdbc1f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_585c4efd-47a1-e7a2-64da-ace6ee154ecd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_64c5f922-1f5f-cc1d-b281-f412a1fd922a" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_d42a3dad-23e9-d83e-cd05-0b20e0cdbc1f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_64c5f922-1f5f-cc1d-b281-f412a1fd922a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_01dc36ce-445b-7f61-af51-1e46c58f3dee" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_d42a3dad-23e9-d83e-cd05-0b20e0cdbc1f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_01dc36ce-445b-7f61-af51-1e46c58f3dee" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_246b6201-33fc-c9d3-a60d-777ab787073b" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDue_d42a3dad-23e9-d83e-cd05-0b20e0cdbc1f" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_246b6201-33fc-c9d3-a60d-777ab787073b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments" xlink:label="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_290724c0-9ba2-b62f-87b3-fb34ea77382b" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments_daf826cc-ddab-c5d4-b68e-bebddaaf3fd6" xlink:to="loc_us-gaap_CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments_290724c0-9ba2-b62f-87b3-fb34ea77382b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_e7ae0c4b-54d0-1d15-1541-1fb5329d750c" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5046b63b-148e-eb12-dd52-2a1e8f1e69c0" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_e7ae0c4b-54d0-1d15-1541-1fb5329d750c" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_5046b63b-148e-eb12-dd52-2a1e8f1e69c0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_483c5d20-89a2-da39-b56f-2ea722d97042" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_e7ae0c4b-54d0-1d15-1541-1fb5329d750c" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_483c5d20-89a2-da39-b56f-2ea722d97042" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_b5a3356e-f555-ddd5-297a-b04afe0bfd5c" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_e7ae0c4b-54d0-1d15-1541-1fb5329d750c" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_b5a3356e-f555-ddd5-297a-b04afe0bfd5c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_6818de09-a032-5221-5ee6-896e1c2d0634" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_e7ae0c4b-54d0-1d15-1541-1fb5329d750c" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_6818de09-a032-5221-5ee6-896e1c2d0634" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_56f89e4f-d247-3cf0-a749-00554ab475a6" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_e7ae0c4b-54d0-1d15-1541-1fb5329d750c" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_56f89e4f-d247-3cf0-a749-00554ab475a6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_fb0efb32-4bb1-57d0-236e-d8af81dc125f" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_e7ae0c4b-54d0-1d15-1541-1fb5329d750c" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_fb0efb32-4bb1-57d0-236e-d8af81dc125f" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/PremisesAndEquipmentNetOfAccumulatedDepreciationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/PremisesAndEquipmentTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ProFormaSummaryDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/RegulatoryCapital" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/RegulatoryCapitalDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/RegulatoryCapitalDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/RegulatoryCapitalTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ScheduledMaturitiesOfFhlbAdvancesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdvancesFromFederalHomeLoanBanks" xlink:label="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_7b05fc35-5f84-3c6c-c727-bb89aa8ceb66" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate_8196ba1d-132c-359e-99b3-4922bb13d0ce" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_7b05fc35-5f84-3c6c-c727-bb89aa8ceb66" xlink:to="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueWithinOneYearOfBalanceSheetDate_8196ba1d-132c-359e-99b3-4922bb13d0ce" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate_2020af99-e5e1-f712-6e58-548310011abb" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_7b05fc35-5f84-3c6c-c727-bb89aa8ceb66" xlink:to="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromOneToTwoYearsOfBalanceSheetDate_2020af99-e5e1-f712-6e58-548310011abb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate_47aa345b-c88f-0ffb-d2e4-4937141a0c91" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_7b05fc35-5f84-3c6c-c727-bb89aa8ceb66" xlink:to="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromTwoToThreeYearsOfBalanceSheetDate_47aa345b-c88f-0ffb-d2e4-4937141a0c91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate_62c156d7-68d9-fb73-a32f-2035dd1ca52d" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_7b05fc35-5f84-3c6c-c727-bb89aa8ceb66" xlink:to="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromThreeToFourYearsOfBalanceSheetDate_62c156d7-68d9-fb73-a32f-2035dd1ca52d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate_32a8a0ab-c4b2-a36f-f794-0db00068c6c0" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_7b05fc35-5f84-3c6c-c727-bb89aa8ceb66" xlink:to="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueFromFourToFiveYearsOfBalanceSheetDate_32a8a0ab-c4b2-a36f-f794-0db00068c6c0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate_c5f57507-b3a9-b805-6d50-ba086bb20c8e" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AdvancesFromFederalHomeLoanBanks_7b05fc35-5f84-3c6c-c727-bb89aa8ceb66" xlink:to="loc_us-gaap_FederalHomeLoanBankAdvancesMaturitiesSummaryDueAfterFiveYearsOfBalanceSheetDate_c5f57507-b3a9-b805-6d50-ba086bb20c8e" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/ScheduledMaturitiesOfTimeDepositsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TimeDeposits" xlink:label="loc_us-gaap_TimeDeposits_dfb31fa0-410a-effc-39b9-3f990161d983" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TimeDepositMaturitiesYearOne" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearOne_f3fb1895-9274-f955-acc4-2661f7e35561" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_dfb31fa0-410a-effc-39b9-3f990161d983" xlink:to="loc_us-gaap_TimeDepositMaturitiesYearOne_f3fb1895-9274-f955-acc4-2661f7e35561" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TimeDepositMaturitiesYearTwo" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearTwo_c588c7fb-9af2-b2cd-3556-1c2d30790a72" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_dfb31fa0-410a-effc-39b9-3f990161d983" xlink:to="loc_us-gaap_TimeDepositMaturitiesYearTwo_c588c7fb-9af2-b2cd-3556-1c2d30790a72" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TimeDepositMaturitiesYearThree" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearThree_c3edd35a-35e7-b63e-70a0-2e0fe1cd4e72" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_dfb31fa0-410a-effc-39b9-3f990161d983" xlink:to="loc_us-gaap_TimeDepositMaturitiesYearThree_c3edd35a-35e7-b63e-70a0-2e0fe1cd4e72" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TimeDepositMaturitiesYearFour" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearFour_4aaeaeb9-dd90-ce22-e8c8-b49863bdcb86" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_dfb31fa0-410a-effc-39b9-3f990161d983" xlink:to="loc_us-gaap_TimeDepositMaturitiesYearFour_4aaeaeb9-dd90-ce22-e8c8-b49863bdcb86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TimeDepositMaturitiesYearFive" xlink:label="loc_us-gaap_TimeDepositMaturitiesYearFive_0875a1e3-6073-6455-20a1-644fd9e9a9f2" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_dfb31fa0-410a-effc-39b9-3f990161d983" xlink:to="loc_us-gaap_TimeDepositMaturitiesYearFive_0875a1e3-6073-6455-20a1-644fd9e9a9f2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TimeDepositMaturitiesAfterYearFive" xlink:label="loc_us-gaap_TimeDepositMaturitiesAfterYearFive_899be221-c841-6ee8-62cb-a41872d7d1d8" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_TimeDeposits_dfb31fa0-410a-effc-39b9-3f990161d983" xlink:to="loc_us-gaap_TimeDepositMaturitiesAfterYearFive_899be221-c841-6ee8-62cb-a41872d7d1d8" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/StatementsOfComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_499015ce-2160-aed2-85a3-080e8c4c6cdf" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_499015ce-2160-aed2-85a3-080e8c4c6cdf" xlink:to="loc_us-gaap_NetIncomeLoss_641b1cab-a2b3-2e0e-8389-1455ff3f8581" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_499015ce-2160-aed2-85a3-080e8c4c6cdf" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_57e8ae74-d8b6-c629-9bee-2d0929cd3999" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_57e8ae74-d8b6-c629-9bee-2d0929cd3999" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_0634f537-fc07-8954-34de-cde2f21c405f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_57e8ae74-d8b6-c629-9bee-2d0929cd3999" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_0634f537-fc07-8954-34de-cde2f21c405f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_d58ac57b-2e86-36b4-7645-929f4187851d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_0634f537-fc07-8954-34de-cde2f21c405f" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_d58ac57b-2e86-36b4-7645-929f4187851d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_7fd05530-dcef-3f65-247b-6b26d31a1b75" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_0634f537-fc07-8954-34de-cde2f21c405f" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax_7fd05530-dcef-3f65-247b-6b26d31a1b75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_fce92d33-1a6b-eabb-7aec-b7f763849491" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_57e8ae74-d8b6-c629-9bee-2d0929cd3999" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax_fce92d33-1a6b-eabb-7aec-b7f763849491" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_6feed690-17e1-a928-d1c5-204f2faa570e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_2a6e77d2-a694-61f8-1c68-085fd849c780" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_6feed690-17e1-a928-d1c5-204f2faa570e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax_b8ea9417-a946-591f-f885-7e7887367db9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_6feed690-17e1-a928-d1c5-204f2faa570e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax_b8ea9417-a946-591f-f885-7e7887367db9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_02278c77-83e2-e592-cc7e-098b64f44f6f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax_b8ea9417-a946-591f-f885-7e7887367db9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_02278c77-83e2-e592-cc7e-098b64f44f6f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax_87718395-99ac-d6a3-868b-78e339bbb8c9" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax_b8ea9417-a946-591f-f885-7e7887367db9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax_87718395-99ac-d6a3-868b-78e339bbb8c9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_4f22ab7c-17d1-8713-b2ed-ce75602eceb9" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax_6feed690-17e1-a928-d1c5-204f2faa570e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_4f22ab7c-17d1-8713-b2ed-ce75602eceb9" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/StockBasedCompensationPlan" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/StockBasedCompensationPlanDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/StockBasedCompensationPlanSummaryOfRestrictedStockAwardActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/StockBasedCompensationPlanTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/SubordinatedDebentures" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/SubordinatedDebenturesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/SubordinatedDebenturesDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/SubordinatedDebenturesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/SubsequentEvents" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/SubsequentEventsDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/SummaryOfEffectiveTaxRateDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_29919d14-72a3-6197-982a-3a6269f21038" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_29919d14-72a3-6197-982a-3a6269f21038" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_c48cf597-7f94-3186-bb2a-448703ee500e" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_c48cf597-7f94-3186-bb2a-448703ee500e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_8718aa1e-c40a-73dd-11d3-b6a4475e0d37" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_8718aa1e-c40a-73dd-11d3-b6a4475e0d37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_bbdfe5da-81eb-653e-11fa-ad8ca690c79b" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome_bbdfe5da-81eb-653e-11fa-ad8ca690c79b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_bd3fb4a2-dba4-9f41-2b9f-30441850eb67" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits_bd3fb4a2-dba4-9f41-2b9f-30441850eb67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_e076fca2-751d-53ee-27b4-64a5b6f5b217" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_8712fd02-171c-5995-3f18-84e885c380b9" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_e076fca2-751d-53ee-27b4-64a5b6f5b217" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/SummaryOfIncomeTaxExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d2250640-c0ab-3b70-41b7-136d9a4aad78" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d2250640-c0ab-3b70-41b7-136d9a4aad78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_36ba223a-0466-98b6-2d31-f243492419f9" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d2250640-c0ab-3b70-41b7-136d9a4aad78" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_36ba223a-0466-98b6-2d31-f243492419f9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_10028fc1-eee3-03f5-6f20-ff5d85e3c0b2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_d2250640-c0ab-3b70-41b7-136d9a4aad78" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_10028fc1-eee3-03f5-6f20-ff5d85e3c0b2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_78b7d85e-8366-fe6d-cb1f-faac5a041b79" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_15bb8413-7c16-05ff-0f24-330007bd87a4" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_15bb8413-7c16-05ff-0f24-330007bd87a4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_40691c72-4a6d-af64-c37e-f5abe38c6165" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f75d01b7-d271-b07d-c4a7-6ae60293303d" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_40691c72-4a6d-af64-c37e-f5abe38c6165" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/TroubledDebtRestructuringsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/UnauditedQuarterlyFinancialDataCondensed" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/UnauditedQuarterlyFinancialDataCondensedDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/UnauditedQuarterlyFinancialDataCondensedTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/VariableInterestEntities" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/VariableInterestEntitiesAmortizationExpenseAndTaxCreditsAndOtherTaxBenefitsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/VariableInterestEntitiesDetailsTextual" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/VariableInterestEntitiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/VariableInterestEntitiesVieCarryingAmountsIncludedInFinancialStatementsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.glacierbancorp.com/role/YearsSubjectToExaminationDetails" xlink:type="extended" />
</link:linkbase>
