<SEC-DOCUMENT>0001228532-18-000013.txt : 20180228
<SEC-HEADER>0001228532-18-000013.hdr.sgml : 20180228
<ACCEPTANCE-DATETIME>20180228152507
ACCESSION NUMBER:		0001228532-18-000013
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180226
FILED AS OF DATE:		20180228
DATE AS OF CHANGE:		20180228

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Michael P. McMasters
		CENTRAL INDEX KEY:			0001228533

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-11590
		FILM NUMBER:		18650614

	BUSINESS ADDRESS:	
		STREET 1:		CHESAPEAKE UTILITIES CORP
		STREET 2:		909 SILVER LAKE BLVD
		CITY:			DOVER
		STATE:			DE
		ZIP:			19904
		BUSINESS PHONE:		3027346799

	MAIL ADDRESS:	
		STREET 1:		909 SILVER LAKE BOULEVARD
		CITY:			DOVER
		STATE:			DE
		ZIP:			19904

	FORMER NAME:	
		FORMER CONFORMED NAME:	MCMASTERS MICHAEL P
		DATE OF NAME CHANGE:	20030422

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CHESAPEAKE UTILITIES CORP
		CENTRAL INDEX KEY:			0000019745
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION & DISTRIBUTION [4923]
		IRS NUMBER:				510064146
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		909 SILVER LAKE BLVD
		STREET 2:		PO BOX 615
		CITY:			DOVER
		STATE:			DE
		ZIP:			19903-0615
		BUSINESS PHONE:		3027346799

	MAIL ADDRESS:	
		STREET 1:		909 SILVER LAKE BLVD
		CITY:			DOVER
		STATE:			DE
		ZIP:			19904
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-02-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000019745</issuerCik>
        <issuerName>CHESAPEAKE UTILITIES CORP</issuerName>
        <issuerTradingSymbol>CPK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001228533</rptOwnerCik>
            <rptOwnerName>Michael P. McMasters</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>909 SILVER LAKE BOULEVARD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DOVER</rptOwnerCity>
            <rptOwnerState>DE</rptOwnerState>
            <rptOwnerZipCode>19904</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President &amp; CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2018-02-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>9959</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>68.85</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>126956</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20079</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>401k Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>55</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Spouse</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">A portion of these shares will be withheld to account for the payment of the tax liability associated with the issuance of the shares.  Such tax liability has not been determined.  The tax liability, when determined, will be reflected on an amendment to this Form 4 or a subsequently filed Form 4.</footnote>
        <footnote id="F2">Includes 189 shares that were acquired for the reporting person since last filing through reinvestment of dividends under Chesapeake Utilities Corporation's Automatic Dividend Reinvestment and Direct Stock Purchase Plan.</footnote>
        <footnote id="F3">Of these shares, 44,461 represent deferred stock units that will be settled on a one-for-one basis in common stock.</footnote>
        <footnote id="F4">Includes 24 shares of common stock that the reporting person acquired under the 401k Plan from January 2018 to February 2018.  Dividends payable on 401k Plan shares were reinvested to purchase 81 additional shares of Chesapeake Utilities Corporation common stock since last filing.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Beth W. Cooper, by Power of Attorney</signatureName>
        <signatureDate>2018-02-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
