Ownership Submission
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)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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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  
Common Stock, no par value 01/17/2003 01/17/2010 01/17/2003 1,500 (4) $ 32.125 D  
Common Stock, no par value 01/16/2004 01/16/2011 01/16/2004 1,500 (5) $ 25.875 D  

Reporting Owners

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

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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