<?xml version="1.0"?><ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-10-09</periodOfReport><notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000055067</issuerCik>
        <issuerName>KELLOGG CO</issuerName>
        <issuerTradingSymbol>K</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001197921</rptOwnerCik>
            <rptOwnerName>KELLOGG W K FOUNDATION TRUST</rptOwnerName>
        </reportingOwnerId>
<reportingOwnerAddress><rptOwnerStreet1>The Bank of New York</rptOwnerStreet1><rptOwnerStreet2>One Wall Street - 19th Floor</rptOwnerStreet2><rptOwnerCity>New York</rptOwnerCity><rptOwnerZipCode>10286</rptOwnerZipCode></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001197916</rptOwnerCik>
            <rptOwnerName>KELLOGG W K FOUNDATION</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>THE BANK OF NEW YORK</rptOwnerStreet1>
            <rptOwnerStreet2>ONE WALL STREET - 19TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode>10286</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-10-09</value></transactionDate><deemedExecutionDate><value>2003-10-09</value></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>18100</value></transactionShares><transactionPricePerShare><value>34.2409</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>124696840</value><footnoteId id="F2"/><footnoteId id="F1"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value><footnoteId id="F1"/></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">124,696,840 shares are directly owned by the W.K. Kellogg Foundation Trust (the "Trust") of which Jonathan T. Walton, William C. Richardson, Carlos M. Gutierrez, and The Bank of New York are Trustees and the W.K. Kellogg Foundation (the "Foundation") is the sole beneficiary.</footnote><footnote id="F2">721,920 shares are indirectly owned by the Carrie Staines Kellogg Trust # 5977 of which the Foundation is currently a beneficiary.</footnote></footnotes><ownerSignature><signatureName>Catherine Boyle, The Bank of New York as Corporate Trustee</signatureName><signatureDate>2003-10-09</signatureDate></ownerSignature></ownershipDocument>



