<SEC-DOCUMENT>0001225208-25-009128.txt : 20251113
<SEC-HEADER>0001225208-25-009128.hdr.sgml : 20251113
<ACCEPTANCE-DATETIME>20251113161124
ACCESSION NUMBER:		0001225208-25-009128
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20251112
FILED AS OF DATE:		20251113
DATE AS OF CHANGE:		20251113

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lynch Karen S
		CENTRAL INDEX KEY:			0001333760
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05397
		FILM NUMBER:		251478564

	MAIL ADDRESS:	
		STREET 1:		151 FARMINGTON AVENUE
		STREET 2:		RW61
		CITY:			HARTFORD
		STATE:			CT
		ZIP:			06156

	FORMER NAME:	
		FORMER CONFORMED NAME:	Rohan Karen
		DATE OF NAME CHANGE:	20050721

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AUTOMATIC DATA PROCESSING INC
		CENTRAL INDEX KEY:			0000008670
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		ORGANIZATION NAME:           	06 Technology
		EIN:				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>2025-11-12</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001333760</rptOwnerCik>
            <rptOwnerName>Lynch Karen S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE ADP BOULEVARD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ROSELAND</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07068</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>82.0000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

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

    <ownerSignature>
        <signatureName>David Kwon (POA on File)</signatureName>
        <signatureDate>2025-11-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poa-klynch.txt
<TEXT>

                                                                   EXHIBIT 24




                         AUTOMATIC DATA PROCESSING, INC.


                          Authorization and Designation
                                to Sign and File
                           Section 16 Reporting Forms


     The undersigned, KAREN S. LYNCH, a director of Automatic Data
Processing, Inc., a Delaware corporation (the Company), does hereby
authorize and designate DOROTHY WISNIOWSKI and MARY B. WOODS to
(i) obtain Electronic Data Gathering and Retrieval (EDGAR) filing
codes, (ii) enroll the undersigned in EDGAR Next, (iii) prepare,
execute and submit to the U.S. Securities and Exchange Commission
a Form ID, amendments thereto and such other documents and
information as may be necessary or appropriate to obtain EDGAR codes,
and (iv) serve as EDGAR account administrators.  The undersigned does
further hereby authorize and designate DAVID KWON, DOROTHY WISNIOWSKI
and MICHAEL A. BONARTI to sign and file on my behalf any and all
Forms 3, 4, 5 and 144 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/ Karen S. Lynch
                                    ---------------------------
                                     KAREN S. LYNCH


Date signed:  October 24, 2025
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
