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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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 SJP0iUjKgMx7RX6IqJ5+Fg==

<SEC-DOCUMENT>0000008670-03-000335.txt : 20031001
<SEC-HEADER>0000008670-03-000335.hdr.sgml : 20031001
<ACCEPTANCE-DATETIME>20031001164128
ACCESSION NUMBER:		0000008670-03-000335
CONFORMED SUBMISSION TYPE:	4/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030811
FILED AS OF DATE:		20031001

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			STOECKERT GEORGE I
		CENTRAL INDEX KEY:			0001225498

	FILING VALUES:
		FORM TYPE:		4/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05397
		FILM NUMBER:		03921170

	BUSINESS ADDRESS:	
		STREET 1:		ONE ADP BLVD
		CITY:			ROSELAND
		STATE:			NJ
		ZIP:			07068
		BUSINESS PHONE:		9139745000

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
</SEC-HEADER>
<DOCUMENT>
<TYPE>4/A
<SEQUENCE>1
<FILENAME>sto170.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4/A</documentType>
	<periodOfReport>2003-08-11</periodOfReport>
	<dateOfOriginalSubmission>2003-08-12</dateOfOriginalSubmission>
	<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000008670</issuerCik>
        <issuerName>AUTOMATIC DATA PROCESSING INC</issuerName>
        <issuerTradingSymbol>ADP</issuerTradingSymbol>
	</issuer>
	<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001225498</rptOwnerCik>
            <rptOwnerName>STOECKERT GEORGE I</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE ADP BOULEVARD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ROSELAND</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07068</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
			<isDirector>0</isDirector>
			<isOfficer>1</isOfficer>
			<isTenPercentOwner>0</isTenPercentOwner>
			<isOther>0</isOther>
			<officerTitle>Corporate Vice President</officerTitle>
		</reportingOwnerRelationship>
	</reportingOwner>
	<derivativeTable>
		<derivativeTransaction>
			<securityTitle>
				<value>Stock Option (Right to Buy)</value>
				<footnoteId id="F1"/>
			</securityTitle>
			<conversionOrExercisePrice>
				<value>37.81</value>
			</conversionOrExercisePrice>
			<transactionDate>
				<value>2003-08-11</value>
			</transactionDate>
			<deemedExecutionDate>
			</deemedExecutionDate>
			<transactionCoding>
				<transactionFormType>4</transactionFormType>
				<transactionCode>A</transactionCode>
				<equitySwapInvolved>0</equitySwapInvolved>
			</transactionCoding>
			<transactionAmounts>
				<transactionShares>
					<value>20000</value>
				</transactionShares>
				<transactionPricePerShare>
					<value>0</value>
				</transactionPricePerShare>
				<transactionAcquiredDisposedCode>
					<value>A</value>
				</transactionAcquiredDisposedCode>
			</transactionAmounts>
			<exerciseDate>
				<value>2004-08-11</value>
				<footnoteId id="F2"/>
			</exerciseDate>
			<expirationDate>
				<value>2013-08-10</value>
			</expirationDate>
			<underlyingSecurity>
				<underlyingSecurityTitle>
					<value>Common Stock</value>
				</underlyingSecurityTitle>
				<underlyingSecurityShares>
					<value>20000.00</value>
				</underlyingSecurityShares>
			</underlyingSecurity>
			<postTransactionAmounts>
				<sharesOwnedFollowingTransaction>
					<value>20000.00</value>
				</sharesOwnedFollowingTransaction>
			</postTransactionAmounts>
			<ownershipNature>
				<directOrIndirectOwnership>
					<value>D</value>
				</directOrIndirectOwnership>
				<natureOfOwnership>
					<value/>
				</natureOfOwnership>
			</ownershipNature>
		</derivativeTransaction>
	</derivativeTable>
	<footnotes>
		<footnote id="F1">Effective October 1, 2003, for stock options granted after January 1, 1999, optionees who retire who are at least 55 years old and who have been employed by the Company for at least 10 years will, subject to the following sentence, have up to 36 months to exercise their vested options, and optionees who retire who are at least 55 years old and who have been employed by the Company for at least 5 years but less than 10 years will, subject to the following sentence, have up to 12 months to exercise their vested options. The options' normal expiration dates will not, in any event, be modified or otherwise changed.</footnote>
		<footnote id="F2">Will vest equally over 5 years</footnote>
	</footnotes>
	<remarks>
	</remarks>
	<ownerSignature>
		<signatureName>By: James B. Benson (POA on file)</signatureName>
		<signatureDate>2003-10-01</signatureDate>
	</ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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