EXHIBIT 24




                         AUTOMATIC DATA PROCESSING, INC.


                          Authorization and Designation
                                to Sign and File
                           Section 16 Reporting Forms


      The undersigned, STUART SACKMAN, a corporate vice president
of Automatic Data Processing, Inc., a Delaware corporation
(the "Company"), does hereby authorize and designate DOROTHY WISNIOWSKI,
MICHAEL A. BONARTI and DAVID KWON 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.

      IN WITNESS WHEREOF, the undersigned has executed this
Authorization and Designation this 9th day of July, 2021.


                                       /s/ Stuart Sackman
                                    -----------------------
                                     STUART SACKMAN


Sworn and subscribed to
before me this 9th day
of July, 2021.


/s/ Mary B. Woods
-------------------------------
Mary B. Woods
Notary Public of New Jersey
My Commission Expires Aug 29, 2021