AUTOMATIC DATA PROCESSING INC (Form: 3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Expires: February 28, 2011 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*
Bonarti Michael A
2. Date of Event Requiring Statement (MM/DD/YYYY) 3/19/2010
3. Issuer Name and Ticker or Trading Symbol
AUTOMATIC DATA PROCESSING INC [ADP]

(Last)        (First)        (Middle)
ONE ADP BOULEVARD
4. Relationship of Reporting Person(s) to Issuer (Check all applicable)
_____ Director                            _____ 10% Owner
___ X ___ Officer (give title below)          _____ Other (specify below)
Staff Vice President /

(Street)
ROSELAND, NJ 07068

(City)              (State)              (Zip) 5. If Amendment, Date Original Filed (MM/DD/YYYY)

6. Individual or Joint/Group Filing (Check Applicable Line)
_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security
(Instr. 4) 2. Amount of Securities Beneficially Owned
(Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5) 4. Nature of Indirect Beneficial Ownership
(Instr. 5)

Common Stock 7277 D

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)

1. Title of Derivate Security
(Instr. 4) 2. Date Exercisable and Expiration Date
(MM/DD/YYYY) 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5) 6. Nature of Indirect Beneficial Ownership
(Instr. 5)

Date Exercisable Expiration Date Title Amount or Number of Shares

Stock Option (Right to Buy) 7/22/2003 7/21/2012 Common Stock 4444 $29.3805 D

Stock Option (Right to Buy) 5/13/2004 5/12/2013 Common Stock 6585 $31.2802 D

Stock Option (Right to Buy) 11/11/2004 11/10/2013 Common Stock 3319 $35.7404 D

Stock Option (Right to Buy) 2/10/2010 2/9/2019 Common Stock 2800 $37.58 D

Stock Option (Right to Buy) 1/27/2006 1/26/2015 Common Stock 4390 $39.3987 D

Stock Option (Right to Buy) 9/21/2002 9/20/2011 Common Stock 925 $39.6356 D

Stock Option (Right to Buy) 1/31/2009 1/30/2018 Common Stock 5600 $40.28 D

Stock Option (Right to Buy) 1/27/2007 1/26/2016 Common Stock 4664 $40.6971 D

Stock Option (Right to Buy) 2/9/2011 2/8/2020 Common Stock 5000 $40.7 D

Stock Option (Right to Buy) 5/11/2005 5/10/2014 Common Stock 6639 $42.3007 D

Stock Option (Right to Buy) 1/26/2008 1/25/2017 Common Stock 3073 $42.9431 D

Stock Option (Right to Buy) 5/6/2003 5/5/2012 Common Stock 5761 $45.8406 D

Stock Option (Right to Buy) 5/10/2001 5/9/2010 Common Stock 4938 $46.3554 D

Stock Option (Right to Buy) 5/15/2002 5/14/2011 Common Stock 5487 $48.1185 D

Explanation of Responses:

Reporting Owners

Reporting Owner Name / Address Relationships

Director 10% Owner Officer Other

Bonarti Michael A
ONE ADP BOULEVARD
ROSELAND, NJ 07068

Staff Vice President

Signatures

/s/ Michael A. Bonarti 3/23/2010

^** Signature of Reporting Person Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	7277	D

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Stock Option (Right to Buy)	7/22/2003	7/21/2012	Common Stock	4444	$29.3805	D
Stock Option (Right to Buy)	5/13/2004	5/12/2013	Common Stock	6585	$31.2802	D
Stock Option (Right to Buy)	11/11/2004	11/10/2013	Common Stock	3319	$35.7404	D
Stock Option (Right to Buy)	2/10/2010	2/9/2019	Common Stock	2800	$37.58	D
Stock Option (Right to Buy)	1/27/2006	1/26/2015	Common Stock	4390	$39.3987	D
Stock Option (Right to Buy)	9/21/2002	9/20/2011	Common Stock	925	$39.6356	D
Stock Option (Right to Buy)	1/31/2009	1/30/2018	Common Stock	5600	$40.28	D
Stock Option (Right to Buy)	1/27/2007	1/26/2016	Common Stock	4664	$40.6971	D
Stock Option (Right to Buy)	2/9/2011	2/8/2020	Common Stock	5000	$40.7	D
Stock Option (Right to Buy)	5/11/2005	5/10/2014	Common Stock	6639	$42.3007	D
Stock Option (Right to Buy)	1/26/2008	1/25/2017	Common Stock	3073	$42.9431	D
Stock Option (Right to Buy)	5/6/2003	5/5/2012	Common Stock	5761	$45.8406	D
Stock Option (Right to Buy)	5/10/2001	5/9/2010	Common Stock	4938	$46.3554	D
Stock Option (Right to Buy)	5/15/2002	5/14/2011	Common Stock	5487	$48.1185	D

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Bonarti Michael A ONE ADP BOULEVARD ROSELAND, NJ 07068			Staff Vice President

Signatures
/s/ Michael A. Bonarti		3/23/2010
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.