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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 aC6TCJHksoNRxxP/mmjCHQ==

<SEC-DOCUMENT>0001225208-08-014591.txt : 20080909
<SEC-HEADER>0001225208-08-014591.hdr.sgml : 20080909
<ACCEPTANCE-DATETIME>20080909131331
ACCESSION NUMBER:		0001225208-08-014591
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080814
FILED AS OF DATE:		20080909
DATE AS OF CHANGE:		20080909

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AUTOMATIC DATA PROCESSING INC
		CENTRAL INDEX KEY:			0000008670
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				221467904
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		ONE ADP BOULVARD
		CITY:			ROSELAND
		STATE:			NJ
		ZIP:			07068
		BUSINESS PHONE:		9739747849

	MAIL ADDRESS:	
		STREET 1:		ONE ADP BOULEVARD
		CITY:			ROSELAND
		STATE:			NJ
		ZIP:			07068

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MARTONE S MICHAEL
		CENTRAL INDEX KEY:			0001198857

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05397
		FILM NUMBER:		081062513

	MAIL ADDRESS:	
		STREET 1:		ONE ADP BLVD
		CITY:			ROSELAND
		STATE:			NJ
		ZIP:			07068
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>doc4a.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4/A</documentType>

    <periodOfReport>2008-08-14</periodOfReport>

    <dateOfOriginalSubmission>2008-08-15</dateOfOriginalSubmission>

    <issuer>
        <issuerCik>0000008670</issuerCik>
        <issuerName>AUTOMATIC DATA PROCESSING INC</issuerName>
        <issuerTradingSymbol>ADP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001198857</rptOwnerCik>
            <rptOwnerName>MARTONE S MICHAEL</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE ADP BOULEVARD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ROSELAND</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07068</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isOfficer>1</isOfficer>
            <officerTitle>Corporate Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-08-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>113487.3153</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Inadvertently reported the performance target award amount for the issuer's 2009 and 2010 fiscal years.  The actual amount of shares to be granted to the reporting person, if any, will depend upon whether, and to what extent, the performance targets are met.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>James B. Benson (POA on file)</signatureName>
        <signatureDate>2008-09-08</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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