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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 BhKl+chMx+59lFOE0U0JLA==

<SEC-DOCUMENT>0001188112-04-000050.txt : 20040114
<SEC-HEADER>0001188112-04-000050.hdr.sgml : 20040114
<ACCEPTANCE-DATETIME>20040114160523
ACCESSION NUMBER:		0001188112-04-000050
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040113
FILED AS OF DATE:		20040114

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			UNITIL CORP
		CENTRAL INDEX KEY:			0000755001
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
		IRS NUMBER:				020381573
		STATE OF INCORPORATION:			NH
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		6 LIBERTY LANE WEST
		CITY:			HAMPTON
		STATE:			NH
		ZIP:			03842
		BUSINESS PHONE:		6037736504

	MAIL ADDRESS:	
		STREET 1:		6 LIBERTY LANE WEST
		CITY:			HAMPTON
		STATE:			NH
		ZIP:			03842

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MORRISSEY RAYMOND J
		CENTRAL INDEX KEY:			0001240980

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08858
		FILM NUMBER:		04525068

	BUSINESS ADDRESS:	
		STREET 1:		6 LIBERTY LANE WEST
		CITY:			HAMPTON
		STATE:			NH
		ZIP:			03842
		BUSINESS PHONE:		6037720775

	MAIL ADDRESS:	
		STREET 1:		6 LIBERTY LANE WEST
		CITY:			HAMPTON
		STATE:			NH
		ZIP:			03842
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>t1510_ex.xml
<TEXT>
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<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
   <periodOfReport>2004-01-13</periodOfReport>
   <notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000755001</issuerCik>
        <issuerName>UNITIL CORP</issuerName>
        <issuerTradingSymbol>UTL</issuerTradingSymbol>
   </issuer>
   <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001240980</rptOwnerCik>
            <rptOwnerName>MORRISSEY RAYMOND J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>6 LIBERTY LANE WEST</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HAMPTON</rptOwnerCity>
            <rptOwnerState>NH</rptOwnerState>
            <rptOwnerZipCode>03842</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
         <isDirector>0</isDirector>
         <isOfficer>0</isOfficer>
         <isTenPercentOwner>0</isTenPercentOwner>
         <isOther>1</isOther>
         <otherText>Vice President, Unitil Service</otherText>
      </reportingOwnerRelationship>
   </reportingOwner>
 <nonDerivativeTable>
   <nonDerivativeTransaction>
      <securityTitle>
         <value>Common Stock, no par value</value>
      </securityTitle>
      <transactionDate>
         <value>2004-01-13</value>
      </transactionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>I</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
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      <transactionAmounts>
         <transactionShares>
           <value>1658.358</value>
         </transactionShares>
         <transactionPricePerShare>
           <value>25.638</value>
         </transactionPricePerShare>
         <transactionAcquiredDisposedCode>
           <value>D</value>
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         <natureOfOwnership>
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   </nonDerivativeTransaction>
   <nonDerivativeTransaction>
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      </securityTitle>
      <transactionDate>
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      </transactionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>J</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
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      <transactionAmounts>
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         </transactionShares>
         <transactionPricePerShare>
           <value>26.34</value>
            <footnoteId id="F3"/>
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         <transactionAcquiredDisposedCode>
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      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>3773.732</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
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         </directOrIndirectOwnership>
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      </ownershipNature>
   </nonDerivativeTransaction>
   <nonDerivativeTransaction>
      <securityTitle>
         <value>Common Stock, no par value</value>
      </securityTitle>
      <transactionDate>
         <value>2003-11-14</value>
      </transactionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
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         <equitySwapInvolved>0</equitySwapInvolved>
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         <transactionPricePerShare>
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   </nonDerivativeTransaction>
   <nonDerivativeTransaction>
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         <value>Common Stock, no par value</value>
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      <transactionDate>
         <value>2003-11-14</value>
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      <transactionCoding>
         <transactionFormType>4</transactionFormType>
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            <footnoteId id="F5"/>
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   </nonDerivativeTransaction>
   <nonDerivativeTransaction>
      <securityTitle>
         <value>Common Stock, no par value</value>
      </securityTitle>
      <transactionDate>
         <value>2003-08-15</value>
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      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>J</transactionCode>
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      <transactionAmounts>
         <transactionShares>
           <value>29.768</value>
         </transactionShares>
         <transactionPricePerShare>
           <value>25.47</value>
            <footnoteId id="F3"/>
         </transactionPricePerShare>
         <transactionAcquiredDisposedCode>
           <value>A</value>
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      </transactionAmounts>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>0</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
            <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </nonDerivativeTransaction>
   <nonDerivativeTransaction>
      <securityTitle>
         <value>Common Stock, no par value</value>
      </securityTitle>
      <transactionDate>
         <value>2003-05-15</value>
      </transactionDate>
      <transactionCoding>
         <transactionFormType>4</transactionFormType>
         <transactionCode>J</transactionCode>
         <equitySwapInvolved>0</equitySwapInvolved>
            <footnoteId id="F4"/>
      </transactionCoding>
      <transactionAmounts>
         <transactionShares>
           <value>30.687</value>
         </transactionShares>
         <transactionPricePerShare>
           <value>24.36</value>
            <footnoteId id="F3"/>
         </transactionPricePerShare>
         <transactionAcquiredDisposedCode>
           <value>A</value>
         </transactionAcquiredDisposedCode>
      </transactionAmounts>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>2764.18</value>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
            <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </nonDerivativeTransaction>
 </nonDerivativeTable>
 <derivativeTable>
   <derivativeHolding>
      <securityTitle>
         <value>Common Stock Options</value>
      </securityTitle>
      <conversionOrExercisePrice>
            <footnoteId id="F7"/>
      </conversionOrExercisePrice>
      <exerciseDate>
            <footnoteId id="F7"/>
      </exerciseDate>
      <expirationDate>
            <footnoteId id="F7"/>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>See Footnote</value>
            <footnoteId id="F7"/>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>0</value>
            <footnoteId id="F7"/>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <postTransactionAmounts>
         <sharesOwnedFollowingTransaction>
           <value>4500</value>
            <footnoteId id="F6"/>
         </sharesOwnedFollowingTransaction>
      </postTransactionAmounts>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>D</value>
         </directOrIndirectOwnership>
      </ownershipNature>
   </derivativeHolding>
 </derivativeTable>
   <footnotes>
      <footnote id="F1"> Shares were included in an intra-plan transfer under the terms and conditions of the Unitil Corporate Tax Deferred Savings and Investment Plan.</footnote>

      <footnote id="F2"> Shares are held in trust under the terms of the Unitil Corporation Tax Deferred Savings and Investment Plan.</footnote>

      <footnote id="F3"> Shares were purchased between January 1 - December 31, 2003 at a range of prices between $23.05 and $26.34 under the terms and conditions of the Unitil Corporation Tax Deferred Savings and Investment Plan.</footnote>

      <footnote id="F4"> Acquisition pursuant to reinvestment of dividends.</footnote>

      <footnote id="F5"> Acquisition pursuant to reinvestment of dividends on shares of restricted stock granted pursuant to the Unitil Corporation Restricted Stock Plan.</footnote>

      <footnote id="F6"> Options were granted under the terms and conditions of the Company's 1998 Stock Option Plan and previously reported on Form 3.</footnote>

      <footnote id="F7"> No information is provided.</footnote>
   </footnotes>
   <ownerSignature>
      <signatureName>/s/ Raymond J. Morrissey</signatureName>
      <signatureDate>2004-01-14</signatureDate>
   </ownerSignature>
</ownershipDocument>

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</SEC-DOCUMENT>
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