FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES 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

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(Print or Type Responses)

1. Name and Address of Reporting Person *   MAHONEY JOHN 2. Date of Event Requiring Statement (Month/Day/Year) 04/13/2011 3. Issuer Name and Ticker or Trading Symbol ZIPCAR INC [ZIP] (Last) (First) (Middle) C/O ZIPCAR, INC., 25 FIRST STREET, 4TH FLOOR 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) CAMBRIDGE, MA 02141 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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 69,348 (1) I See Footnotes (2) (3)

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

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		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)	  (4)	10/20/2020	Common Stock	32,650 (5)	$ 10.98 (5)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MAHONEY JOHN C/O ZIPCAR, INC. 25 FIRST STREET, 4TH FLOOR CAMBRIDGE, MA 02141	  X	Â	Â	Â

Signatures

/s/ John J. Mahoney, Jr.		04/08/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Reflects a 1-for-2 reverse stock split of the common stock of Zipcar, Inc., which became effective on March 29, 2011, pursuant to which each share of common stock was reduced by half.
(2)	Held by the John Mahoney 2011 Qualified Annuity Trust, of which Mr. Mahoney is trustee.
(3)	Mr. Mahoney disclaims beneficial ownership of the shares held by the John Mahoney 2011 Qualified Annuity Trust, except to the extent of his pecuniary interest therein.
(4)	This option becomes exercisable in 48 equal monthly installments following October 20, 2010.
(5)	Reflects a 1-for-2 reverse stock split of the common stock of Zipcar, Inc., which became effective on March 29, 2011, pursuant to which (i) the number of shares of common stock underlying this option was reduced by half and (ii) the exercise price of this option was doubled.
  Remarks: Exhibit 24 - Power of Attorney

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