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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 N50VETNVZXwZjFtzw2QR12l4BsYidkwc+uEKGzQlcqn7BAojEY21DX+GRSXhi6TE
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<SEC-DOCUMENT>0001074902-03-000001.txt : 20030728
<SEC-HEADER>0001074902-03-000001.hdr.sgml : 20030728
<ACCEPTANCE-DATETIME>20030728145047
ACCESSION NUMBER:		0001074902-03-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030724
FILED AS OF DATE:		20030728

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LCNB CORP
		CENTRAL INDEX KEY:			0001074902
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				311626393
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2 NORTH BROADWAY
		CITY:			LEBANON
		STATE:			OH
		ZIP:			45036
		BUSINESS PHONE:		5139321414

	MAIL ADDRESS:	
		STREET 1:		2 NORTH BROADWAY
		CITY:			LEBANON
		STATE:			OH
		ZIP:			45036

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			STOLLE KATHLEEN PORTER
		CENTRAL INDEX KEY:			0001188133
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		STATE OF INCORPORATION:			OH
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26121
		FILM NUMBER:		03805906

	BUSINESS ADDRESS:	
		STREET 1:		5713 WILIMINGTON RD
		CITY:			OREGONIA
		STATE:			OH
		ZIP:			45054
		BUSINESS PHONE:		513 932 8211

	MAIL ADDRESS:	
		STREET 1:		5713 WILMINGTON RD
		CITY:			OREGONIA
		STATE:			OH
		ZIP:			45054
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-07-24</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001074902</issuerCik>
        <issuerName>LCNB CORP</issuerName>
        <issuerTradingSymbol>LCNB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001188133</rptOwnerCik>
            <rptOwnerName>STOLLE KATHLEEN PORTER</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5713 WILMINGTON RD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>OREGONIA</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>45054</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>LCNB Corp Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2003-07-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>63.75</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5340</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">7,600 shares of LCNB Corp Common Stock are indirectly owned through a marital trust.</footnote>
    </footnotes>


    <ownerSignature>
        <signatureName>Kathleen P. Stolle</signatureName>
        <signatureDate>2003-07-28</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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