Washington, D.C. 20549

(Rule 14a-101)



Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934 (Amendment No. )

Filed by the Registrant [x]
Filed by a Party other than the Registrant [_]

Check the appropriate box:
[_]  Preliminary Proxy Statement                 
[_]  Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
[_]  Definitive Proxy Statement
[x]  Definitive Additional Materials
[_] Soliciting Material Pursuant to §240.14a-12

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calculated and state how it was determined):
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[_] Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which
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*** Exercise Your Right to Vote ***
Important Notice Regarding the Availability of Proxy Materials for the
Stockholder Meeting to Be Held on November 09, 2010.

         P.O. BOX 9163
         FARMINGDALE, NY 11735

Meeting Information
  Meeting Type:      Annual Meeting
 For holders as of:   September 10, 2010
  Date:  November 09, 2010  Time:  10:00 AM EST
  Location:     Automatic Data Processing, Inc.
  Corporate Office
  One ADP Boulevard
  Roseland, New Jersey

You are receiving this communication because you hold shares in the above-named company.
This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. You may view the proxy materials online at or easily request a paper copy (see reverse side).
We encourage you to access and review all of the important information contained in the proxy materials before voting.

See the reverse side of this notice to obtain proxy materials and voting instructions.


—  Before You Vote  —
How to Access the Proxy Materials
Proxy Materials Available to VIEW or RECEIVE:
1. Combined Document Containing Notice of 2010 Annual Meeting of Stockholders, Proxy Statement and Annual Report on Form 10-K.
How to View Online:
Have the information that is printed in the box marked by the arrow è XXXX XXXX XXXX (located on the following page) and visit:
How to Request and Receive a PAPER or E-MAIL Copy:
If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for requesting a copy. Please choose one of the following methods to make your request:
                                           1) BY INTERNET: 
                                           2) BY TELEPHONE:
                                           3) BY E-MAIL*: 
* If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow  è XXXX XXXX XXXX (located on the following page) in the subject line. 
Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before October 26, 2010 to facilitate timely delivery.
—  How To Vote  —
Please Choose One of the Following Voting Methods
Vote In Person: Many stockholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.
Vote By Internet: To vote now by Internet, go to Have the information that is printed in the box marked by the arrow è XXXX XXXX XXXX available and follow the instructions. 
Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.


Voting Items
The Board of Directors recommends a
vote FOR the following:
Election of Directors
01)  Gregory D. Brenneman       
02)  Leslie A. Brun
03)  Gary C. Butler
04)  Leon G. Cooperman
05)  Eric C. Fast
06)  Linda R. Gooden
07)  R. Glenn Hubbard
08)  John P. Jones
09)  Sharon T. Rowlands
10)  Enrique T. Salem
11)  Gregory L. Summe
  The Board of Directors recommends a vote FOR the following proposals:      
Amendment of the Automatic Data Processing, Inc. Employees' Savings-Stock Purchase Plan
  3.   Appointment of Deloitte & Touche LLP    
The proxies will vote in their discretion upon any and all other matters which may properly come before the meeting or any adjournment thereof.