<SUBMISSION>
<ACCESSION-NUMBER>0001179110-09-008024
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20090518
<FILING-DATE>20090518
<DATE-OF-FILING-DATE-CHANGE>20090518
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>HUBBARD ALLAN B
<CIK>0001192086
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>001-14469
<FILM-NUMBER>09836625
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>ANTHEM INC.
<STREET2>120 MONUMENT CIRCLE
<CITY>INDIANAPOLIS
<STATE>IN
<ZIP>46204
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>SIMON PROPERTY GROUP INC /DE/
<CIK>0001063761
<ASSIGNED-SIC>6798
<IRS-NUMBER>046268599
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>225 WEST WASHINGTON STREET
<CITY>INDIANAPOLIS
<STATE>IN
<ZIP>46204-3438
<PHONE>317-636-1600
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>225 WEST WASHINGTON STREET
<CITY>INDIANAPOLIS
<STATE>IN
<ZIP>46204-3438
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>CORPORATE PROPERTY INVESTORS INC
<DATE-CHANGED>19980610
</FORMER-COMPANY>
</ISSUER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 3 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2009-05-18</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001063761</issuerCik>
        <issuerName>SIMON PROPERTY GROUP INC /DE/</issuerName>
        <issuerTradingSymbol>SPG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001192086</rptOwnerCik>
            <rptOwnerName>HUBBARD ALLAN B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>101 WEST OHIO STREET, SUITE 1350</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>INDIANAPOLIS</rptOwnerCity>
            <rptOwnerState>IN</rptOwnerState>
            <rptOwnerZipCode>46204</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>Allan B. Hubbard, and his attorney-in-fact, Shelly Doran</signatureName>
        <signatureDate>2009-05-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
