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  <xsd:element id="buse_LoansAndLeasesReceivableLimitAboveWhichLoansAreProcessedThroughExpeditedUnderwritingProcess" name="LoansAndLeasesReceivableLimitAboveWhichLoansAreProcessedThroughExpeditedUnderwritingProcess" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
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  <xsd:element id="buse_BankPropertyHeldForSaleFairValueDisclosure" name="BankPropertyHeldForSaleFairValueDisclosure" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
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  <xsd:element id="buse_AmortizationOfDiscountOnFederalHomeLoanBankAdvances" name="AmortizationOfDiscountOnFederalHomeLoanBankAdvances" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
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  <xsd:element id="buse_LongTermDebtExcludingSeniorNotesSubordinatedNotesAndJuniorSubordinated" name="LongTermDebtExcludingSeniorNotesSubordinatedNotesAndJuniorSubordinated" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
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  <xsd:element id="buse_InterestRateLockCommitmentsAndForwardSalesCommitmentsMember" name="InterestRateLockCommitmentsAndForwardSalesCommitmentsMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
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  <xsd:element id="buse_AccretionOfPremiumsAndDiscountsOnTimeDeposits" name="AccretionOfPremiumsAndDiscountsOnTimeDeposits" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
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  <xsd:element id="buse_InterestRateSwapsPayFloatingReceiveFixedMember" name="InterestRateSwapsPayFloatingReceiveFixedMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element id="buse_InterestIncomeExpenseTradingLiabilities" name="InterestIncomeExpenseTradingLiabilities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
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  <xsd:element id="buse_EmployeeStockPurchasePlan2021Member" name="EmployeeStockPurchasePlan2021Member" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
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  <xsd:element id="buse_NotesPayableFhlbResidentialAndCommercialRealEstateLoansAndFhlbStockMember" name="NotesPayableFhlbResidentialAndCommercialRealEstateLoansAndFhlbStockMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
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  <xsd:element id="buse_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndOutstandingWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndOutstandingWeightedAverageGrantDateFairValue" nillable="true" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <xsd:element id="buse_ProceedsFromIssuanceOfTreasuryStockForEmployeeStockPurchaseProgram" name="ProceedsFromIssuanceOfTreasuryStockForEmployeeStockPurchaseProgram" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
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  <xsd:element id="buse_InterestRateSwapsPayFixedReceiveFloatingMember" name="InterestRateSwapsPayFixedReceiveFloatingMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
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  <xsd:element id="buse_PaymentModificationMember" name="PaymentModificationMember" nillable="true" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <xsd:element name="CumminsAmericanCorpMember" id="buse_CumminsAmericanCorpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="Covid19LoanModificationsMember" id="buse_Covid19LoanModificationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InterestOnlyDeferralsMember" id="buse_InterestOnlyDeferralsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MortgageAndPersonalLoanDeferralsMember" id="buse_MortgageAndPersonalLoanDeferralsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
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  <xsd:element name="ScheduleOfFinancingReceivableTroubledDebtRestructuringModificationsUnderCaresActTableTextBlock" id="buse_ScheduleOfFinancingReceivableTroubledDebtRestructuringModificationsUnderCaresActTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfRiskParticipantAgreement" id="buse_NumberOfRiskParticipantAgreement" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="Covid19PayrollAssistanceForSmallBusinesscovid19PayrollAssistanceForSmallBusiness" id="buse_Covid19PayrollAssistanceForSmallBusinesscovid19PayrollAssistanceForSmallBusiness" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TotalCountOfDebtSecuritiesAvailableForSaleSecurities" id="buse_TotalCountOfDebtSecuritiesAvailableForSaleSecurities" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TotalCountOfDebtSecuritiesHeldToMaturity" id="buse_TotalCountOfDebtSecuritiesHeldToMaturity" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtSecuritiesHeldToMaturityUnrealizedLossPositionNumberOfPositions" id="buse_DebtSecuritiesHeldToMaturityUnrealizedLossPositionNumberOfPositions" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TotalCountOfDebtSecurities" id="buse_TotalCountOfDebtSecurities" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtSecuritiesUnrealizedLossPositionNumberOfPositions" id="buse_DebtSecuritiesUnrealizedLossPositionNumberOfPositions" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtSecuritiesFairValue" id="buse_DebtSecuritiesFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" id="buse_DebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="HeldForMaturitySecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue" id="buse_HeldForMaturitySecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="SecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue" id="buse_SecuritiesInUnrealizedLossPositionsAsPercentageOfAggregateCarryingValue" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="PerformanceBasedPerformanceStockUnitsMember" id="buse_PerformanceBasedPerformanceStockUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InterestRateDebtSwapMember" id="buse_InterestRateDebtSwapMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InterestRateLoanSwapMember" id="buse_InterestRateLoanSwapMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SofrIndexedInterestRateMember" id="buse_SofrIndexedInterestRateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BalancesCarriedInAociAbstract" id="buse_BalancesCarriedInAociAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NatureOfOperationsAbstract" id="buse_NatureOfOperationsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="Covid19Abstract" id="buse_Covid19Abstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AcquisitionsAdditionalConsiderationPaidInFormOfSpecialDividendPayment" id="buse_AcquisitionsAdditionalConsiderationPaidInFormOfSpecialDividendPayment" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="HeldToMaturityDebtSecuritiesInUnrealizedLossPositionAbstract" id="buse_HeldToMaturityDebtSecuritiesInUnrealizedLossPositionAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AvailableForSaleDebtSecuritiesInUnrealizedLossPositionAbstract" id="buse_AvailableForSaleDebtSecuritiesInUnrealizedLossPositionAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AvailableForSaleAndHeldToMaturityDebtSecuritiesInUnrealizedLossPositionAbstract" id="buse_AvailableForSaleAndHeldToMaturityDebtSecuritiesInUnrealizedLossPositionAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TransferOfInvestmentSecuritiesAvailableForSaleToHeldToMaturity" id="buse_TransferOfInvestmentSecuritiesAvailableForSaleToHeldToMaturity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="FixedToFloatingRateNotesDue2032Member" id="buse_FixedToFloatingRateNotesDue2032Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FixedToFloatingRateNotesDue2027Member" id="buse_FixedToFloatingRateNotesDue2027Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentRedemptionAmount" id="buse_DebtInstrumentRedemptionAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PercentageOfPrincipalAmountOfNotes" id="buse_PercentageOfPrincipalAmountOfNotes" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ChangeInAccountingPrinciplePolicyPolicyTextBlock" id="buse_ChangeInAccountingPrinciplePolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DerivativeLossOnDerivative1" id="buse_DerivativeLossOnDerivative1" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssetsPercent" id="buse_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssetsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TierOneRiskBasedCapitalToRiskWeightedAssetsPercent" id="buse_TierOneRiskBasedCapitalToRiskWeightedAssetsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsPercent" id="buse_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssetsPercent" id="buse_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssetsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TierOneLeverageCapitalToAverageAssetsPercent" id="buse_TierOneLeverageCapitalToAverageAssetsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssetsPercent" id="buse_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssetsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="CapitalToRiskWeightedAssetsPercent" id="buse_CapitalToRiskWeightedAssetsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsPercent" id="buse_CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="CapitalRequiredToBeWellCapitalizedToRiskWeightedAssetsPercent" id="buse_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssetsPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
</xsd:schema>
