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  <xsd:element id="cofs_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherLiabilities" name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherLiabilities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumed" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAdvancesFromFederalHomeLoanBank" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAdvancesFromFederalHomeLoanBank" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDepositBasedIntangible" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDepositBasedIntangible" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalFundsPurchased" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalFundsPurchased" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalHomeLoanBankAndFederalReserveBankStock" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalHomeLoanBankAndFederalReserveBankStock" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInterestBearingDeposits" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInterestBearingDeposits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansToOtherFinancialInstitutions" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansToOtherFinancialInstitutions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoninterestBearingDeposits" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoninterestBearingDeposits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOriginatedLoans" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOriginatedLoans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherRealEstateOwned" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherRealEstateOwned" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTotalDeposits" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTotalDeposits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTotalLoans" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTotalLoans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTrustPreferredSecurities" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTrustPreferredSecurities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="cofs_CashDividendMember" name="CashDividendMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_CertificatesOfDepositIssuedThroughCDARS" name="CertificatesOfDepositIssuedThroughCDARS" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="cofs_ChoiceOneBankMember" name="ChoiceOneBankMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_CommercialAndIndustrialMember" name="CommercialAndIndustrialMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_CommercialRealEstateLoans" name="CommercialRealEstateLoans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="cofs_CommunityShoresBankCorpCommunityShoresMember" name="CommunityShoresBankCorpCommunityShoresMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_CommunityShoresBankCorporationMember" name="CommunityShoresBankCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_ConstructionRealEstateMember" name="ConstructionRealEstateMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_CountyBankCorpCountyMember" name="CountyBankCorpCountyMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_CountyBankCorpMember" name="CountyBankCorpMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_CreditRiskConcentrationsTableTextBlock" name="CreditRiskConcentrationsTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_CustomerServiceCharges" name="CustomerServiceCharges" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_DebtSecuritiesAvailableForSaleAndEquitySecuritiesFvniAmortizedCost" name="DebtSecuritiesAvailableForSaleAndEquitySecuritiesFvniAmortizedCost" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_DebtSecuritiesAvailableForSaleAndEquitySecuritiesFvniTotal" name="DebtSecuritiesAvailableForSaleAndEquitySecuritiesFvniTotal" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_DebtSecuritiesAvailableForSaleNumberOfPositionsSold" name="DebtSecuritiesAvailableForSaleNumberOfPositionsSold" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/>
  <xsd:element id="cofs_DebtSecuritiesAvailableForSalePricePerPosition" name="DebtSecuritiesAvailableForSalePricePerPosition" nillable="true" substitutionGroup="xbrli:item" type="xbrli:pureItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="cofs_DeferredCompensationPlanMember" name="DeferredCompensationPlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_DeferredTaxAssesWritedownsOfOtherRealEstateOwned" name="DeferredTaxAssesWritedownsOfOtherRealEstateOwned" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_DeferredTaxAssetsNetOfAllowanceAndLiability" name="DeferredTaxAssetsNetOfAllowanceAndLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_DeferredTaxAssetsPurchaseAccountingAdjustments" name="DeferredTaxAssetsPurchaseAccountingAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_DeferredTaxLiabilitiesInterestRateLockCommitments" name="DeferredTaxLiabilitiesInterestRateLockCommitments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_DeferredTaxLiabilitiesPurchaseAccountingAdjustments" name="DeferredTaxLiabilitiesPurchaseAccountingAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_DividendRestrictionsPolicyPolicyTextBlock" name="DividendRestrictionsPolicyPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_EarningsOnDeathBenefitFromBankOwnedLifeInsurance" name="EarningsOnDeathBenefitFromBankOwnedLifeInsurance" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_EffectOfCovid19PandemicPolicyTextBlock" name="EffectOfCovid19PandemicPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_EffectiveIncomeTaxRateReconciliationAcquisitionOfBusinessAmount" name="EffectiveIncomeTaxRateReconciliationAcquisitionOfBusinessAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_EffectiveIncomeTaxRateReconciliationDisallowedInterestExpense" name="EffectiveIncomeTaxRateReconciliationDisallowedInterestExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_EquityInUndistributedNetIncomeOfSubsidiaries" name="EquityInUndistributedNetIncomeOfSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_ExercisePriceRangeFourMember" name="ExercisePriceRangeFourMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_ExercisePriceRangeOneMember" name="ExercisePriceRangeOneMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_ExercisePriceRangeThreeMember" name="ExercisePriceRangeThreeMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_ExercisePriceRangeTwoMember" name="ExercisePriceRangeTwoMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_FederalHomeLoanBankAdvancesMaturingJanuary2022Member" name="FederalHomeLoanBankAdvancesMaturingJanuary2022Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_FederalHomeLoanBankAdvancesMaturingNovember2024Member" name="FederalHomeLoanBankAdvancesMaturingNovember2024Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_FederalHomeLoanBankBorrowingsAndTermLoansFairValueDisclosure" name="FederalHomeLoanBankBorrowingsAndTermLoansFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="cofs_FinancialAsset30DaysPastDueOrMoreMember" name="FinancialAsset30DaysPastDueOrMoreMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_FinancingReceivableAcquiredWithDeterioratedCreditQuality" name="FinancingReceivableAcquiredWithDeterioratedCreditQuality" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_FinancingReceivableAmountForgiven" name="FinancingReceivableAmountForgiven" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_FinancingReceivableNumberOfPaymentDeferrals" name="FinancingReceivableNumberOfPaymentDeferrals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/>
  <xsd:element id="cofs_ImpairedLoansFairValueDisclosure" name="ImpairedLoansFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_InterestAndDividendIncomeFromSubsidiaries" name="InterestAndDividendIncomeFromSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_InterestBearingAndNoninterestBearingDepositBrokered" name="InterestBearingAndNoninterestBearingDepositBrokered" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_InterestRateCommitmentsToExtendCredit" name="InterestRateCommitmentsToExtendCredit" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_InterestRateLockCommitmentsFairValueDisclosure" name="InterestRateLockCommitmentsFairValueDisclosure" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_LoanServicingFeesNet" name="LoanServicingFeesNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_LoansAndLeasesReceivableOtherFinancialInstitution" name="LoansAndLeasesReceivableOtherFinancialInstitution" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_LoansAndLeasesReceivableRelatedPartiesAcquired" name="LoansAndLeasesReceivableRelatedPartiesAcquired" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_MortgageBankingTextBlock" name="MortgageBankingTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_MortgageLoansServicedForOthers" name="MortgageLoansServicedForOthers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_MortgageServicingRights" name="MortgageServicingRights" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_NatureOfOperationsPolicyPolicyTextBlock" name="NatureOfOperationsPolicyPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_NumberOfBranchOffices" name="NumberOfBranchOffices" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/>
  <xsd:element id="cofs_NumberOfLoanOffice" name="NumberOfLoanOffice" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="cofs_OneFormerExecutiveOfficerAndOneCurrentExecutiveOfficerOfLakestoneMember" name="OneFormerExecutiveOfficerAndOneCurrentExecutiveOfficerOfLakestoneMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_OtherRealEstateFairValue" name="OtherRealEstateFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_OtherRealEstateOwnedTableTextBlock" name="OtherRealEstateOwnedTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_PPPLoansMember" name="PPPLoansMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_PastDue30DaysOrMoreMember" name="PastDue30DaysOrMoreMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_ProceedsFromBankOwnedLifeIncomePolicy" name="ProceedsFromBankOwnedLifeIncomePolicy" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_ProceedsFromCostsCapitalizedToOtherRealEstate" name="ProceedsFromCostsCapitalizedToOtherRealEstate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_ProceedsOfDebtDownstreamed" name="ProceedsOfDebtDownstreamed" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_SBACARESActPaycheckProtectionProgramMember" name="SBACARESActPaycheckProtectionProgramMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_ScheduleOfActivityInSecondaryMarketLoansTableTextBlock" name="ScheduleOfActivityInSecondaryMarketLoansTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_ScheduleOfDepositsOutstandingTableTextBlock" name="ScheduleOfDepositsOutstandingTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_ServicingAssetAtAmortizedCostCapitalized" name="ServicingAssetAtAmortizedCostCapitalized" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="instant"/>
  <xsd:element id="cofs_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="instant"/>
  <xsd:element id="cofs_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedWeightedAverageGrantDateFairValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsForfeitedWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_SubordinatedNotesDue2031Member" name="SubordinatedNotesDue2031Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_TermCommitmentsToExtendCredit" name="TermCommitmentsToExtendCredit" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_TermLoanMember" name="TermLoanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_The401kPlanMember" name="The401kPlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_TheStockIncentivePlanOf2012Member" name="TheStockIncentivePlanOf2012Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_TimeDeposits250000OrMore" name="TimeDeposits250000OrMore" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="cofs_TrustIncome" name="TrustIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_TrustPreferredSecuritiesMember" name="TrustPreferredSecuritiesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_UnusedLinesOfCreditAndLettersOfCreditFixedRate" name="UnusedLinesOfCreditAndLettersOfCreditFixedRate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="cofs_UnusedLinesOfCreditAndLettersOfCreditVariableRate" name="UnusedLinesOfCreditAndLettersOfCreditVariableRate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_ValleyRidgeFinancialCorpMember" name="ValleyRidgeFinancialCorpMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="cofs_WriteDownsOfOtherRealEstate" name="WriteDownsOfOtherRealEstate" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-1-summary-of-significant-accounting-policies-accumulated-other-comprehensive-income-details" name="statement-statement-note-1-summary-of-significant-accounting-policies-accumulated-other-comprehensive-income-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-1-summary-of-significant-accounting-policies-tables" name="statement-statement-note-1-summary-of-significant-accounting-policies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-11-income-taxes-deferred-tax-assets-and-liabilities-details" name="statement-statement-note-11-income-taxes-deferred-tax-assets-and-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-11-income-taxes-reconciliation-of-effective-income-tax-rate-details" name="statement-statement-note-11-income-taxes-reconciliation-of-effective-income-tax-rate-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-11-income-taxes-reconciliation-of-effective-income-tax-rate-details-parentheticals" name="statement-statement-note-11-income-taxes-reconciliation-of-effective-income-tax-rate-details-parentheticals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-11-income-taxes-tables" name="statement-statement-note-11-income-taxes-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-12-related-party-transactions-loans-to-related-parties-details" name="statement-statement-note-12-related-party-transactions-loans-to-related-parties-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-12-related-party-transactions-tables" name="statement-statement-note-12-related-party-transactions-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-14-stock-based-compensation-stock-option-activity-details" name="statement-statement-note-14-stock-based-compensation-stock-option-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-14-stock-based-compensation-stock-options-outstanding-by-exercise-price-range-details" name="statement-statement-note-14-stock-based-compensation-stock-options-outstanding-by-exercise-price-range-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-14-stock-based-compensation-summary-of-activity-for-restricted-stock-units-outstanding-details" name="statement-statement-note-14-stock-based-compensation-summary-of-activity-for-restricted-stock-units-outstanding-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-14-stock-based-compensation-tables" name="statement-statement-note-14-stock-based-compensation-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-15-earnings-per-share-computation-of-basic-earnings-per-share-and-diluted-earnings-per-share-details" name="statement-statement-note-15-earnings-per-share-computation-of-basic-earnings-per-share-and-diluted-earnings-per-share-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-15-earnings-per-share-tables" name="statement-statement-note-15-earnings-per-share-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-16-condensed-financial-statements-of-parent-company-condensed-balance-sheets-details" name="statement-statement-note-16-condensed-financial-statements-of-parent-company-condensed-balance-sheets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-16-condensed-financial-statements-of-parent-company-condensed-statements-of-cash-flows-details" name="statement-statement-note-16-condensed-financial-statements-of-parent-company-condensed-statements-of-cash-flows-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-16-condensed-financial-statements-of-parent-company-condensed-statements-of-income-details" name="statement-statement-note-16-condensed-financial-statements-of-parent-company-condensed-statements-of-income-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-16-condensed-financial-statements-of-parent-company-tables" name="statement-statement-note-16-condensed-financial-statements-of-parent-company-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-17-financial-instruments-financial-instruments-details" name="statement-statement-note-17-financial-instruments-financial-instruments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-17-financial-instruments-tables" name="statement-statement-note-17-financial-instruments-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-18-fair-value-measurements-assets-measured-at-fair-value-on-a-nonrecurring-basis-details" name="statement-statement-note-18-fair-value-measurements-assets-measured-at-fair-value-on-a-nonrecurring-basis-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-18-fair-value-measurements-assets-measured-at-fair-value-on-a-recurring-basis-details" name="statement-statement-note-18-fair-value-measurements-assets-measured-at-fair-value-on-a-recurring-basis-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-18-fair-value-measurements-changes-in-level-3-assets-measured-at-fair-value-on-a-recurring-basis-details" name="statement-statement-note-18-fair-value-measurements-changes-in-level-3-assets-measured-at-fair-value-on-a-recurring-basis-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-18-fair-value-measurements-tables" name="statement-statement-note-18-fair-value-measurements-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-19-offbalance-sheet-activities-offbalance-sheet-risk-details" name="statement-statement-note-19-offbalance-sheet-activities-offbalance-sheet-risk-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-19-offbalance-sheet-activities-tables" name="statement-statement-note-19-offbalance-sheet-activities-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-2-securities-carrying-amount-of-securities-pledged-as-collateral-details" name="statement-statement-note-2-securities-carrying-amount-of-securities-pledged-as-collateral-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-2-securities-contractual-maturities-details" name="statement-statement-note-2-securities-contractual-maturities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-2-securities-fair-value-of-equity-securities-and-related-gross-unrealized-gains-losses-recognized-in-interest-income-details" name="statement-statement-note-2-securities-fair-value-of-equity-securities-and-related-gross-unrealized-gains-losses-recognized-in-interest-income-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-2-securities-fair-value-of-securities-available-for-sale-and-the-related-unrealized-gains-and-losses-recognized-in-accumulated-comprehensive-income-details" name="statement-statement-note-2-securities-fair-value-of-securities-available-for-sale-and-the-related-unrealized-gains-and-losses-recognized-in-accumulated-comprehensive-income-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-2-securities-sales-of-securities-details" name="statement-statement-note-2-securities-sales-of-securities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-2-securities-securities-with-unrealized-losses-aggregated-by-investment-category-and-time-with-unrealized-loss-position-details" name="statement-statement-note-2-securities-securities-with-unrealized-losses-aggregated-by-investment-category-and-time-with-unrealized-loss-position-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-2-securities-tables" name="statement-statement-note-2-securities-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-2-securities-unrealized-gains-and-losses-on-equity-securities-details" name="statement-statement-note-2-securities-unrealized-gains-and-losses-on-equity-securities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-20-regulatory-capital-regulatory-capital-details" name="statement-statement-note-20-regulatory-capital-regulatory-capital-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-20-regulatory-capital-tables" name="statement-statement-note-20-regulatory-capital-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-21-business-combination-allocation-of-purchase-price-details" name="statement-statement-note-21-business-combination-allocation-of-purchase-price-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-21-business-combinations-tables" name="statement-statement-note-21-business-combinations-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-3-loans-and-allowance-for-loan-losses-acquired-portfolio-and-the-acquisition-fair-value-adjustments-details" name="statement-statement-note-3-loans-and-allowance-for-loan-losses-acquired-portfolio-and-the-acquisition-fair-value-adjustments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-3-loans-and-allowance-for-loan-losses-aging-analysis-of-loans-by-loan-category-details" name="statement-statement-note-3-loans-and-allowance-for-loan-losses-aging-analysis-of-loans-by-loan-category-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-3-loans-and-allowance-for-loan-losses-allowance-for-loan-losses-and-balance-in-the-loan-portfolio-details" name="statement-statement-note-3-loans-and-allowance-for-loan-losses-allowance-for-loan-losses-and-balance-in-the-loan-portfolio-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-3-loans-and-allowance-for-loan-losses-credit-risk-profile-details" name="statement-statement-note-3-loans-and-allowance-for-loan-losses-credit-risk-profile-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-3-loans-and-allowance-for-loan-losses-impaired-loans-by-loan-category-details" name="statement-statement-note-3-loans-and-allowance-for-loan-losses-impaired-loans-by-loan-category-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-3-loans-and-allowance-for-loan-losses-loan-portfolio-details" name="statement-statement-note-3-loans-and-allowance-for-loan-losses-loan-portfolio-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-3-loans-and-allowance-for-loan-losses-nonaccrual-loan-by-loan-category-details" name="statement-statement-note-3-loans-and-allowance-for-loan-losses-nonaccrual-loan-by-loan-category-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-3-loans-and-allowance-for-loan-losses-tables" name="statement-statement-note-3-loans-and-allowance-for-loan-losses-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-3-loans-and-allowance-for-loan-losses-troubled-debt-restructurings-details" name="statement-statement-note-3-loans-and-allowance-for-loan-losses-troubled-debt-restructurings-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-4-mortgage-banking-loan-servicing-rights-details" name="statement-statement-note-4-mortgage-banking-loan-servicing-rights-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-4-mortgage-banking-secondary-market-loans-details" name="statement-statement-note-4-mortgage-banking-secondary-market-loans-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-4-mortgage-banking-tables" name="statement-statement-note-4-mortgage-banking-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-5-premises-and-equipment-rent-commitments-details" name="statement-statement-note-5-premises-and-equipment-rent-commitments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-5-premises-and-equipment-schedule-of-premises-and-equipment-details" name="statement-statement-note-5-premises-and-equipment-schedule-of-premises-and-equipment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-5-premises-and-equipment-tables" name="statement-statement-note-5-premises-and-equipment-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-6-goodwill-and-acquired-intangible-assets-tables" name="statement-statement-note-6-goodwill-and-acquired-intangible-assets-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-6-goodwill-and-intangible-assets-acquired-intangibles-details" name="statement-statement-note-6-goodwill-and-intangible-assets-acquired-intangibles-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-6-goodwill-and-intangible-assets-estimated-amortization-expense-details" name="statement-statement-note-6-goodwill-and-intangible-assets-estimated-amortization-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-6-goodwill-and-intangible-assets-goodwill-details" name="statement-statement-note-6-goodwill-and-intangible-assets-goodwill-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-7-other-real-estate-owned-activity-within-other-real-estate-owned-details" name="statement-statement-note-7-other-real-estate-owned-activity-within-other-real-estate-owned-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-7-other-real-estate-owned-tables" name="statement-statement-note-7-other-real-estate-owned-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-8-deposits-deposit-balances-details" name="statement-statement-note-8-deposits-deposit-balances-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-8-deposits-maturities-of-certificate-of-deposit-details" name="statement-statement-note-8-deposits-maturities-of-certificate-of-deposit-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-8-deposits-tables" name="statement-statement-note-8-deposits-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-9-borrowings-federal-home-loan-bank-advances-details" name="statement-statement-note-9-borrowings-federal-home-loan-bank-advances-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-9-borrowings-federal-home-loan-bank-advances-details-parentheticals" name="statement-statement-note-9-borrowings-federal-home-loan-bank-advances-details-parentheticals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-9-borrowings-tables" name="statement-statement-note-9-borrowings-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-9-borrowings-term-loan-details" name="statement-statement-note-9-borrowings-term-loan-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-note-9-borrowings-term-loan-details-parentheticals" name="statement-statement-note-9-borrowings-term-loan-details-parentheticals" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="cofs_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
