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 *   Brock Laurence M 2. Date of Event Requiring Statement (Month/Day/Year) 06/17/2005 3. Issuer Name and Ticker or Trading Symbol UNITIL CORP [UTL] (Last) (First) (Middle) 6 LIBERTY LANE WEST 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Controller & C.A.O. 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) HAMPTON, NH 03842 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, no par value 924.469 D   Common Stock, no par value 727 I held in trust (1) Common Stock, no par value 2,000 I held in trust (2)

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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
Common Stock, no par value	03/05/2002	03/05/2009	03/05/2005	1,500 (3)	$ 23.375	D	Â
Common Stock, no par value	01/17/2003	01/17/2010	01/17/2003	1,500 (4)	$ 32.125	D	Â
Common Stock, no par value	01/16/2004	01/16/2011	01/16/2004	1,500 (5)	$ 25.875	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Brock Laurence M 6 LIBERTY LANE WEST HAMPTON, NH 03842	Â	Â	  Controller & C.A.O.	Â

Signatures

/s/ Laurence M. Brock		06/22/2005
**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)	Shares are held in trust under the terms of the Unitil Corporation Tax Deffered Savings and Investment Plan.
(2)	Shares are held in the Brock Family Trust
(3)	Options were granted March 5, 1999 under the terms and conditions of the Company's 1998 Stock Option Plan.
(4)	Options were granted January 17, 2000 under the terms and conditions of the Company's 1998 Stock Option Plan
(5)	Options were granted January 16, 2001 under the terms and conditions of the Company's 1998 Stock Option Plan

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