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        <link:definition>090300 - Disclosure - Revenues (Details)</link:definition>
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        <link:definition>090500 - Disclosure - Impairment of Long-lived Assets (Details)</link:definition>
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      <link:roleType roleURI="http://kirbycorp.com/role/InventoriesDetails" id="InventoriesDetails">
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        <link:definition>090600 - Disclosure - Inventories (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://kirbycorp.com/role/LongtermDebtScheduleOfLongtermDebtDetails" id="LongtermDebtScheduleOfLongtermDebtDetails">
        <!--Parent Role: Long-Term Debt-->
        <link:definition>090800 - Disclosure - Long-Term Debt, Schedule of Long-Term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://kirbycorp.com/role/LongtermDebtScheduleOfAggregatePaymentsDueOnLongtermDebtDetails" id="LongtermDebtScheduleOfAggregatePaymentsDueOnLongtermDebtDetails">
        <!--Parent Role: Long-Term Debt-->
        <link:definition>090802 - Disclosure - Long-Term Debt, Schedule of Aggregate Payments Due on The Long-Term Debt (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://kirbycorp.com/role/LongtermDebtDetails" id="LongtermDebtDetails">
        <!--Parent Role: Long-Term Debt-->
        <link:definition>090804 - Disclosure - Long-Term Debt (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://kirbycorp.com/role/TaxesOnIncomeEarningsBeforeTaxesDetails" id="TaxesOnIncomeEarningsBeforeTaxesDetails">
        <!--Parent Role: Taxes on Income-->
        <link:definition>090900 - Disclosure - Taxes on Income, Earnings Before Taxes (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <!--Parent Role: Taxes on Income-->
        <link:definition>090902 - Disclosure - Taxes on Income, Schedule of Effective Income Tax Rate Reconciliation (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <link:definition>090904 - Disclosure - Taxes on Income, Schedule of Deferred Tax Assets and Liabilities (Details)</link:definition>
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        <link:definition>090906 - Disclosure - Taxes on Income, Reconciliation of Liability for Unrecognized Tax Benefits (Details)</link:definition>
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        <link:definition>091000 - Disclosure - Stock Award Plans, Compensation Cost (Details)</link:definition>
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      <link:roleType roleURI="http://kirbycorp.com/role/StockAwardPlansEmployeePlanStockOptionActivityDetails" id="StockAwardPlansEmployeePlanStockOptionActivityDetails">
        <!--Parent Role: Stock Award Plans-->
        <link:definition>091002 - Disclosure - Stock Award Plans, Employee Plan Stock Option Activity (Details)</link:definition>
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        <!--Parent Role: Stock Award Plans-->
        <link:definition>091004 - Disclosure - Stock Award Plans, Employee Plan Outstanding and Exercisable Options (Details)</link:definition>
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      <link:roleType roleURI="http://kirbycorp.com/role/StockAwardPlansEmployeePlanRestrictedStockAwardActivityDetails" id="StockAwardPlansEmployeePlanRestrictedStockAwardActivityDetails">
        <!--Parent Role: Stock Award Plans-->
        <link:definition>091006 - Disclosure - Stock Award Plans, Employee Plan Restricted Stock Award Activity (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://kirbycorp.com/role/StockAwardPlansEmployeePlanRsuActivityDetails" id="StockAwardPlansEmployeePlanRsuActivityDetails">
        <!--Parent Role: Stock Award Plans-->
        <link:definition>091008 - Disclosure - Stock Award Plans, Employee Plan RSU Activity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://kirbycorp.com/role/StockAwardPlansDirectorPlanStockOptionActivityDetails" id="StockAwardPlansDirectorPlanStockOptionActivityDetails">
        <!--Parent Role: Stock Award Plans-->
        <link:definition>091010 - Disclosure - Stock Award Plans, Director Plan Stock Option Activity (Details)</link:definition>
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      <link:roleType roleURI="http://kirbycorp.com/role/StockAwardPlansDirectorPlanOutstandingAndExercisableOptionsDetails" id="StockAwardPlansDirectorPlanOutstandingAndExercisableOptionsDetails">
        <!--Parent Role: Stock Award Plans-->
        <link:definition>091012 - Disclosure - Stock Award Plans, Director Plan Outstanding and Exercisable Options (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://kirbycorp.com/role/StockAwardPlansDirectorPlanRestrictedStockAwardActivityDetails" id="StockAwardPlansDirectorPlanRestrictedStockAwardActivityDetails">
        <!--Parent Role: Stock Award Plans-->
        <link:definition>091014 - Disclosure - Stock Award Plans, Director Plan Restricted Stock Award Activity (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://kirbycorp.com/role/StockAwardPlansAllPlansOptionsAndRestrictedStockAwardActivityDetails" id="StockAwardPlansAllPlansOptionsAndRestrictedStockAwardActivityDetails">
        <!--Parent Role: Stock Award Plans-->
        <link:definition>091016 - Disclosure - Stock Award Plans, All Plans Options and Restricted Stock Award Activity (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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      <link:roleType roleURI="http://kirbycorp.com/role/RetirementPlansInformationAboutPlanAssetsAndAssetAllocationDetails" id="RetirementPlansInformationAboutPlanAssetsAndAssetAllocationDetails">
        <!--Parent Role: Retirement Plans-->
        <link:definition>091100 - Disclosure - Retirement Plans, Information About Plan Assets and Asset Allocation (Details)</link:definition>
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        <link:usedOn>link:calculationLink</link:usedOn>
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        <!--Parent Role: Retirement Plans-->
        <link:definition>091102 - Disclosure - Retirement Plans, Schedule of Change in Benefit Obligation (Details)</link:definition>
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        <!--Parent Role: Retirement Plans-->
        <link:definition>091104 - Disclosure - Retirement Plans, Weighted-Average Assumption Used to Determine Benefit Obligation (Details)</link:definition>
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        <!--Parent Role: Retirement Plans-->
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        <!--Parent Role: Retirement Plans-->
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        <!--Parent Role: Retirement Plans-->
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        <!--Parent Role: Retirement Plans-->
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        <!--Parent Role: Retirement Plans-->
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        <!--Parent Role: Retirement Plans-->
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        <!--Parent Role: Retirement Plans-->
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        <!--Parent Role: Retirement Plans-->
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  <xs:element name="SavageInlandMarineLLCMember" id="kex_SavageInlandMarineLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
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  <xs:element name="EmployeePensionPlanGrandfatheredParticipantsParticipantServicePeriodWhoIsFiftyYearsOld" id="kex_EmployeePensionPlanGrandfatheredParticipantsParticipantServicePeriodWhoIsFiftyYearsOld" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
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  <xs:element name="SeafarersPensionTrustMember" id="kex_SeafarersPensionTrustMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="CentralPensionFundOfTheInternationalUnionOfOperatingMember" id="kex_CentralPensionFundOfTheInternationalUnionOfOperatingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
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  <xs:element name="OperatingLeasesWeightedAverageDiscountRateAndRemainingLeaseTermTableTextBlock" id="kex_OperatingLeasesWeightedAverageDiscountRateAndRemainingLeaseTermTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
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  <xs:element name="TargaResourcesCorporationMember" id="kex_TargaResourcesCorporationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
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</xs:schema>
</XBRL>
