<SUBMISSION>
<ACCESSION-NUMBER>0001179110-09-003920
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20090227
<FILING-DATE>20090303
<DATE-OF-FILING-DATE-CHANGE>20090303
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>LEWIS GARY L
<CIK>0001235741
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-14469
<FILM-NUMBER>09651304
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>115 W WASHINGTON ST
<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>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-02-27</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001235741</rptOwnerCik>
            <rptOwnerName>LEWIS GARY L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>225 W. WASHINGTON STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>INDIANAPOLIS</rptOwnerCity>
            <rptOwnerState>IN</rptOwnerState>
            <rptOwnerZipCode>46204</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President Leasing/SR EVP</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-02-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5795</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>59695</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Award of restricted stock under a stock incentive program established pursuant to the Simon Property Group, L.P. 1998 Stock Incentive Plan. The restricted stock included within such award is subject to forfeiture unless recipient satisfies vesting requirements.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Gary L. Lewis, and his attorney-in-fact, Shelly Doran</signatureName>
        <signatureDate>2009-03-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
