<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-01-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001361025</issuerCik>
        <issuerName>DCP Holding CO</issuerName>
        <issuerTradingSymbol>None</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001197858</rptOwnerCik>
            <rptOwnerName>COOK JACK M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PROVIDENT FINANCIAL GROUP, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>MS 860A, ONE EAST FOURTH STREET</rptOwnerStreet2>
            <rptOwnerCity>CINCINNATI</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>45202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Share Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2008-01-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>27</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class B Redeemable Common Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>27</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>57</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Each Restricted Share Unit represents the economic equivalent of
one Class B Redeemable Common Share.</footnote>
        <footnote id="F2">The Restricted Share Units have been granted to the Reporting
Person pursuant to the Issuer's 2006 Dental Care Plus Management
Incentive Plan. The Restricted Share Units are subject to forfeiture if
the Reporting Person does not attend 75% of the regularly scheduled
meetings of the Board of Directors in 2008. The Reporting Person
has elected to defer the receipt of the Restricted Share Units under
the Issuer's Deferred Compensation Plan and therefore pursuant to
the Deferred Compensation Plan, provided the Restricted Share
Units have not been forfeited, the Restricted Share Units will be
settled in cash upon the Reporting Person's termination of
membership on the Issuer's Board of Directors.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/Thomas W. Kahle, Esq., Attorney-in-Fact for Jack M. Cook</signatureName>
        <signatureDate>2008-03-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
