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    <schemaVersion>X0708</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001170010</cik>
        <entityName>CARMAX INC</entityName>
        <issuerAddress>
            <street1>12800 TUCKAHOE CREEK PARKWAY</street1>
            <city>RICHMOND</city>
            <stateOrCountry>VA</stateOrCountry>
            <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
            <zipCode>23238</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(804) 747-0422</issuerPhoneNumber>
        <jurisdictionOfInc>VIRGINIA</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Eric</firstName>
                <middleName>M.</middleName>
                <lastName>Margolin</lastName>
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            <relatedPersonAddress>
                <street1>12800 Tuckahoe Creek Parkway</street1>
                <city>Richmond</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>23238</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Vice President, General Counsel and Corporate Secretary</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Peter</firstName>
                <middleName>J.</middleName>
                <lastName>Bensen</lastName>
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                <street1>12800 Tuckahoe Creek Parkway</street1>
                <city>Richmond</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>23238</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
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            <relatedPersonName>
                <firstName>Ronald</firstName>
                <middleName>E.</middleName>
                <lastName>Blaylock</lastName>
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                <street1>12800 Tuckahoe Creek Parkway</street1>
                <city>Richmond</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>23238</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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            <relationshipClarification></relationshipClarification>
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            <relatedPersonName>
                <firstName>Sona</firstName>
                <lastName>Chawla</lastName>
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                <street1>12800 Tuckahoe Creek Parkway</street1>
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                <zipCode>23238</zipCode>
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                <firstName>Thomas</firstName>
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                <lastName>Folliard</lastName>
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                <street1>12800 Tuckahoe Creek Parkway</street1>
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                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
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            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mark</firstName>
                <middleName>F.</middleName>
                <lastName>O'Neil</lastName>
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                <street1>12800 Tuckahoe Creek Parkway</street1>
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        <relatedPersonInfo>
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                <firstName>Pietro</firstName>
                <lastName>Satriano</lastName>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Marcella</firstName>
                <lastName>Shinder</lastName>
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                <street1>12800 Tuckahoe Creek Parkway</street1>
                <city>Richmond</city>
                <stateOrCountry>VA</stateOrCountry>
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                <zipCode>23238</zipCode>
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            <relatedPersonName>
                <firstName>Mitchell</firstName>
                <middleName>D.</middleName>
                <lastName>Steenrod</lastName>
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                <street1>12800 Tuckahoe Creek Parkway</street1>
                <city>Richmond</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>23238</zipCode>
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                <firstName>Shira</firstName>
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                <city>Richmond</city>
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                <zipCode>23238</zipCode>
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            <relatedPersonName>
                <firstName>Robert</firstName>
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                <city>Richmond</city>
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                <zipCode>23238</zipCode>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>David</firstName>
                <lastName>McCreight</lastName>
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                <street1>12800 Tuckahoe Creek Parkway</street1>
                <city>Richmond</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>23238</zipCode>
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                <relationship>Director</relationship>
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            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Charles</firstName>
                <middleName>Joseph</middleName>
                <lastName>Wilson</lastName>
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            <relatedPersonAddress>
                <street1>12800 Tuckahoe Creek Parkway</street1>
                <city>Richmond</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>23238</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Senior Vice President, Store Strategy and Logistics</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>D.</middleName>
                <lastName>Nash</lastName>
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            <relatedPersonAddress>
                <street1>12800 Tuckahoe Creek Parkway</street1>
                <city>Richmond</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>23238</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>President and Chief Executive Officer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Edwin</firstName>
                <middleName>J.</middleName>
                <lastName>Hill</lastName>
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                <street1>12800 Tuckahoe Creek Parkway</street1>
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                <zipCode>23238</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Vice President and Chief Operating Officer</relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <lastName>Lyski</lastName>
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                <zipCode>23238</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
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            <relationshipClarification>Executive Vice President, Chief Marketing Officer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Shamim</firstName>
                <lastName>Mohammad</lastName>
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                <zipCode>23238</zipCode>
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            <relationshipClarification>Executive Vice President, Chief Information and Technology Officer</relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Diane</firstName>
                <middleName>L.</middleName>
                <lastName>Cafritz</lastName>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Jon</firstName>
                <middleName>G.</middleName>
                <lastName>Daniels</lastName>
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                <zipCode>23238</zipCode>
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            <relatedPersonRelationshipList>
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        <relatedPersonInfo>
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                <firstName>Enrique</firstName>
                <lastName>Mayor-Mora</lastName>
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                <firstName>Darren</firstName>
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            <relationshipClarification>Senior Vice President, Store Operations</relationshipClarification>
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    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Over $100,000,000</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06c</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2021-06-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>true</isBusinessCombinationTransaction>
            <clarificationOfResponse>Restricted stock to be issued as partial consideration in the acquisition of a private company.</clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>98187292</totalOfferingAmount>
            <totalAmountSold>98187292</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>21</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
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                <dollarAmount>0</dollarAmount>
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            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>CARMAX INC</issuerName>
                <signatureName>/s/ Eric M. Margolin</signatureName>
                <nameOfSigner>Eric M. Margolin</nameOfSigner>
                <signatureTitle>EVP, General Counsel and Corporate Secretary</signatureTitle>
                <signatureDate>2021-06-08</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>