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  <xs:element id="tcbk_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" abstract="false" name="CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="tcbk_VRBSubordinatedSixPercentMember" abstract="true" name="VRBSubordinatedSixPercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_UnrealizedGainLossOnSecuritiesAvailableForSale" abstract="false" name="UnrealizedGainLossOnSecuritiesAvailableForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_OffBalanceSheetCreditLossWriteoff" abstract="false" name="OffBalanceSheetCreditLossWriteoff" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_PerformanceShareUnitsVesting" abstract="false" name="PerformanceShareUnitsVesting" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_DepositAccountOverdraftPrivilegeMember" abstract="true" name="DepositAccountOverdraftPrivilegeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_CollateralDependentLoansMember" abstract="true" name="CollateralDependentLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tcbk_AmortizedCostBasisOfCollateralDependentLoansTableTextBlock" abstract="false" name="AmortizedCostBasisOfCollateralDependentLoansTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_ForeclosedAssetsMember" abstract="true" name="ForeclosedAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_MultifamilyCollateralMember" abstract="true" name="MultifamilyCollateralMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_PaymentForLoanAndLeaseOriginationsAndPrincipalCollections" abstract="false" name="PaymentForLoanAndLeaseOriginationsAndPrincipalCollections" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_NumberOfCountiesBankOperates" abstract="false" name="NumberOfCountiesBankOperates" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tcbk_CollateralPledgedAndUnsecuredMember" abstract="true" name="CollateralPledgedAndUnsecuredMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_FivePointSevenZeroFixedRatedCollateralizedBorrowingsMember" abstract="true" name="FivePointSevenZeroFixedRatedCollateralizedBorrowingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tcbk_PercentageOfAggregateDepreciationInUnrealizedLosses" abstract="false" name="PercentageOfAggregateDepreciationInUnrealizedLosses" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="tcbk_AccumulatedJointBeneficiaryAgreementLiabilityMember" abstract="true" name="AccumulatedJointBeneficiaryAgreementLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_PaymentCombinationExtensionAmount" abstract="false" name="PaymentCombinationExtensionAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityNet" abstract="false" name="RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_ScheduleOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock" abstract="false" name="ScheduleOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_LoansHeldForSaleMember" abstract="true" name="LoansHeldForSaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_IncentiveCompensationExpense" abstract="false" name="IncentiveCompensationExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_LossesFromFairValueAdjustmentsAssetsAndLiabilities" abstract="false" name="LossesFromFairValueAdjustmentsAssetsAndLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsReclassificationNetOfTax" abstract="false" name="OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsReclassificationNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_LaborAndRelatedExpenseExcludingMergerRelatedCosts" abstract="false" name="LaborAndRelatedExpenseExcludingMergerRelatedCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_ScheduleOfNonAccrualLoansTableTextBlock" abstract="false" name="ScheduleOfNonAccrualLoansTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_CourierService" abstract="false" name="CourierService" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_CreditLossRollForward" abstract="true" name="CreditLossRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_SecuritiesPledgedAsCollateral" abstract="false" name="SecuritiesPledgedAsCollateral" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_BusinessDescriptionAndBasisOfPresentationPolicyTextBlock" abstract="false" name="BusinessDescriptionAndBasisOfPresentationPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_ScheduleOfOtherNoninterestIncomeAndExpenseTable" abstract="true" name="ScheduleOfOtherNoninterestIncomeAndExpenseTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_ComponentsOfOtherNoninterestIncomeTableTextBlock" abstract="false" name="ComponentsOfOtherNoninterestIncomeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_JuniorSubordinatedDebtTextBlock" abstract="false" name="JuniorSubordinatedDebtTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_ScheduleOfOtherNoninterestIncomeAndExpenseLineItems" abstract="true" name="ScheduleOfOtherNoninterestIncomeAndExpenseLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfOptionsTenderedByEmployeesAndDirectors" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfOptionsTenderedByEmployeesAndDirectors" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tcbk_VRBSubordinatedFivePercentMember" abstract="true" name="VRBSubordinatedFivePercentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_AssetManagementAndCommissionIncome" abstract="false" name="AssetManagementAndCommissionIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_FinancingReceivableNonccrualNoAllowanceIncludingGuaranteedLoans" abstract="false" name="FinancingReceivableNonccrualNoAllowanceIncludingGuaranteedLoans" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_CREOwnerOccupiedMember" abstract="true" name="CREOwnerOccupiedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_PreferredSecuritiesRedeemableInterestRate" abstract="false" name="PreferredSecuritiesRedeemableInterestRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="tcbk_LesseeOperatingLeaseNumberOfRenewalTermOptions" abstract="false" name="LesseeOperatingLeaseNumberOfRenewalTermOptions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tcbk_InvestmentSecuritiesLineItems" abstract="true" name="InvestmentSecuritiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_CreditLossAllowanceForCreditLossWriteoff" abstract="false" name="CreditLossAllowanceForCreditLossWriteoff" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_PaymentDelayTermExtensionMember" abstract="true" name="PaymentDelayTermExtensionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tcbk_AAAAAAMember" abstract="true" name="AAAAAAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_CurrentlyNotExercisableMember" abstract="true" name="CurrentlyNotExercisableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_RegulatoryAssessmentsAndInsurance" abstract="false" name="RegulatoryAssessmentsAndInsurance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_AgricultureProductionPortfolioSegmentMember" abstract="true" name="AgricultureProductionPortfolioSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCreditedFromDividends" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCreditedFromDividends" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tcbk_MortgageServicingRightsMember" abstract="true" name="MortgageServicingRightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_ScheduleOfWeightedAverageLeaseTermAndDiscountRateRelatedToOperatingLeaseTableTextBlock" abstract="false" name="ScheduleOfWeightedAverageLeaseTermAndDiscountRateRelatedToOperatingLeaseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_TwoThousandTwentyOneStockRepurchasePlanMember" abstract="true" name="TwoThousandTwentyOneStockRepurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_LifeOfMortgageBackedSecurities" abstract="false" name="LifeOfMortgageBackedSecurities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="tcbk_RestrictedStockUnitsReleasedShares" abstract="false" name="RestrictedStockUnitsReleasedShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tcbk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrExpiredInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrExpiredInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tcbk_NonAgencyCollateralizedMortgageObligationsMember" abstract="true" name="NonAgencyCollateralizedMortgageObligationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_ServiceConditionRestrictedStockUnitsMember" abstract="true" name="ServiceConditionRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_RestrictedStockUnitsMarketConditionMember" abstract="true" name="RestrictedStockUnitsMarketConditionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_OtherNoninterestExpenseExcludingMergerRelatedCosts" abstract="false" name="OtherNoninterestExpenseExcludingMergerRelatedCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_OperatingInterestIncomeOther" abstract="false" name="OperatingInterestIncomeOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_ExcessMortgageServicingRightsMember" abstract="true" name="ExcessMortgageServicingRightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_OperationalLosses" abstract="false" name="OperationalLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_NumberOfSubsidiaryBusinessTrust" abstract="false" name="NumberOfSubsidiaryBusinessTrust" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tcbk_SFRFirstDeedMember" abstract="true" name="SFRFirstDeedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_CreditLossExpenseReversal" abstract="false" name="CreditLossExpenseReversal" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_SummaryOfBanksCommitmentsAndContingentLiabilitiesTableTextBlock" abstract="false" name="SummaryOfBanksCommitmentsAndContingentLiabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_CashAtFederalReserveAndOtherBanks" abstract="false" name="CashAtFederalReserveAndOtherBanks" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_SaleOfCustomerChecks" abstract="false" name="SaleOfCustomerChecks" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_SignificantAccountingPoliciesTable" abstract="true" name="SignificantAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_DebtSecuritiesHeldToMaturityUnrealizedAccumulatedLoss" abstract="false" name="DebtSecuritiesHeldToMaturityUnrealizedAccumulatedLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_BaseSalariesNetOfDeferredLoanOriginationCosts" abstract="false" name="BaseSalariesNetOfDeferredLoanOriginationCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_CRENonOwnerOccupiedMember" abstract="true" name="CRENonOwnerOccupiedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_OverdraftPrivilegeCommitmentsMember" abstract="true" name="OverdraftPrivilegeCommitmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_LoanChargedOffCarryingValue" abstract="false" name="LoanChargedOffCarryingValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_GainLossOnForeclosedAssetsExcludingTransferOfLoans1" abstract="false" name="GainLossOnForeclosedAssetsExcludingTransferOfLoans1" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_GeographicalDescriptionsPolicyTextBlock" abstract="false" name="GeographicalDescriptionsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_NorthValleyTrustFourMember" abstract="true" name="NorthValleyTrustFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_NorthValleyTrustThreeMember" abstract="true" name="NorthValleyTrustThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_CreditLossAllowanceForCreditLossRecovery" abstract="false" name="CreditLossAllowanceForCreditLossRecovery" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_FarmlandMember" abstract="true" name="FarmlandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_FivePointSixNineFixedRatedCollateralizedBorrowingsMember" abstract="true" name="FivePointSixNineFixedRatedCollateralizedBorrowingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tcbk_CombinationTermExtensionRateChangeMember" abstract="true" name="CombinationTermExtensionRateChangeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tcbk_EstimatedFairValuesOfFinancialInstrumentsThatAreReportedAtAmortizedCostInConsolidatedBalanceSheetsTableTextBlock" abstract="false" name="EstimatedFairValuesOfFinancialInstrumentsThatAreReportedAtAmortizedCostInConsolidatedBalanceSheetsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_SignificantAccountingPoliciesLineItems" abstract="true" name="SignificantAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_AccountsReceivableAndInventoryMember" abstract="true" name="AccountsReceivableAndInventoryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_FinancingReceivableNonaccrualIncludingGuaranteedLoans" abstract="false" name="FinancingReceivableNonaccrualIncludingGuaranteedLoans" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_CommercialAndIndustrialPortfolioSegmentOneMember" abstract="true" name="CommercialAndIndustrialPortfolioSegmentOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tcbk_ObligationsIncurredLeasedAssets" abstract="false" name="ObligationsIncurredLeasedAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_OtherTimeCertificatesDeposits" abstract="false" name="OtherTimeCertificatesDeposits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_ConstructionPortfolioSegmentMember" abstract="true" name="ConstructionPortfolioSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_NorthValleyTrustTwoMember" abstract="true" name="NorthValleyTrustTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_OfficeMember" abstract="true" name="OfficeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_NonaccrualStatusLoansContractualPastDue" abstract="false" name="NonaccrualStatusLoansContractualPastDue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="tcbk_LoansReceivableImpairedInterestLostOnNonaccrualLoans" abstract="false" name="LoansReceivableImpairedInterestLostOnNonaccrualLoans" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_QuantitativeInformationFairValueMeasurementsForFinancialInstrumentsMeasuredAtFairValueOnNonrecurringBasisLevelThreeTableTextBlock" abstract="false" name="QuantitativeInformationFairValueMeasurementsForFinancialInstrumentsMeasuredAtFairValueOnNonrecurringBasisLevelThreeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_CreditLossAllowanceForCreditLoss" abstract="false" name="CreditLossAllowanceForCreditLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_SFRSecondDeedMember" abstract="true" name="SFRSecondDeedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_ProvisionForBenefitFromLossesOnForeclosedAssets" abstract="false" name="ProvisionForBenefitFromLossesOnForeclosedAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_InvestmentSecuritiesTable" abstract="true" name="InvestmentSecuritiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_TriCoCapitalTrustIMember" abstract="true" name="TriCoCapitalTrustIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_OtherLoansMember" abstract="true" name="OtherLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_CommercialAndIndustrialPortfolioSegmentMember" abstract="true" name="CommercialAndIndustrialPortfolioSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_CurrentlyExercisableMember" abstract="true" name="CurrentlyExercisableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_AllowanceForLoanAndLeaseLossesAbstract" abstract="true" name="AllowanceForLoanAndLeaseLossesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_SummaryOfOtherBorrowingsTableTextBlock" abstract="false" name="SummaryOfOtherBorrowingsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_OffBalanceSheetAbstract" abstract="true" name="OffBalanceSheetAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_ProvisionForBenefitFromProvisionsForLoanLosses" abstract="false" name="ProvisionForBenefitFromProvisionsForLoanLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_NorthValleyBancorpMember" abstract="true" name="NorthValleyBancorpMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="tcbk_ComponentsOfNonInterestExpenseTableTextBlock" abstract="false" name="ComponentsOfNonInterestExpenseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_SummaryOfActivityInAllowanceForLoanLossesAndLoansNetOfUnearnedFeesTableTextBlock" abstract="false" name="SummaryOfActivityInAllowanceForLoanLossesAndLoansNetOfUnearnedFeesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="tcbk_FourPointSevenFiveFixedRatedCollateralizedBorrowingsMember" abstract="true" name="FourPointSevenFiveFixedRatedCollateralizedBorrowingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="tcbk_MarketableEquitySecuritiesMember" abstract="true" name="MarketableEquitySecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
