EXHIBIT 24




                         AUTOMATIC DATA PROCESSING, INC.


                          Authorization and Designation
                                to Sign and File
                           Section 16 Reporting Forms


      The undersigned, DON McGUIRE, 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.

      IN WITNESS WHEREOF, the undersigned has executed this
Authorization and Designation this 12th day of June, 2018.


                                       /s/ Don McGuire
                                    --------------------------
                                     DON McGUIRE