<SEC-DOCUMENT>0001225208-21-009147.txt : 20210609
<SEC-HEADER>0001225208-21-009147.hdr.sgml : 20210609
<ACCEPTANCE-DATETIME>20210609173737
ACCESSION NUMBER:		0001225208-21-009147
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20210603
FILED AS OF DATE:		20210609
DATE AS OF CHANGE:		20210609

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			D'Ambrosio Christopher
		CENTRAL INDEX KEY:			0001866614

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05397
		FILM NUMBER:		211006117

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

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:		9739745000

	MAIL ADDRESS:	
		STREET 1:		ONE ADP BOULEVARD
		CITY:			ROSELAND
		STATE:			NJ
		ZIP:			07068
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc3.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2021-06-03</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001866614</rptOwnerCik>
            <rptOwnerName>D'Ambrosio Christopher</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>Corp. VP</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1646.0000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>90.6300</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2017-09-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2026-08-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>429.0000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>107.3500</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2018-09-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2027-08-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1257.0000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>138.5300</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2021-09-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2030-08-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1735.0000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>146.7500</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2019-09-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2028-08-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>902.0000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>169.8400</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2020-09-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2029-08-31</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1491.0000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes></footnotes>

    <remarks>poa-dambrosio.txt</remarks>

    <ownerSignature>
        <signatureName>Michael A. Bonarti (POA on file)</signatureName>
        <signatureDate>2021-06-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poa-dambrosio.txt
<TEXT>

                                                                   EXHIBIT 24




                         AUTOMATIC DATA PROCESSING, INC.


                          Authorization and Designation
                                to Sign and File
                           Section 16 Reporting Forms


      The undersigned, Christopher D'Ambrosio, a corporate vice president
of Automatic Data Processing, Inc., a Delaware corporation
the "Company"), does hereby authorize and designate
MICHAEL A. BONARTI to sign and file on my behalf any and all
Forms 3, 4 and 5 relating to equity securities of the Company
pursuant to the requirements of Section 16 of the Securities
Exchange Act of 1934 ("Section 16"). This authorization,
unless earlier revoked by the undersigned in writing, shall be
valid until the undersigned's reporting obligations under
Section 16 with respect to equity securities of the Company
shall cease.



                                       /s/ Christopher D'Ambrosio
                                    -----------------------------
                                     CHRISTOPHER D'AMBROSIO

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