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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MCXE8xlQZCxFC7BNPyHdTYhTP+STXr+BLtIjKRwg6ctzHcNE6xGb39we2jrGWxv0
 2z6CuMVUu1UfianJ0NRufQ==

<SEC-DOCUMENT>0001389606-09-000020.txt : 20090819
<SEC-HEADER>0001389606-09-000020.hdr.sgml : 20090819
<ACCEPTANCE-DATETIME>20090819111149
ACCESSION NUMBER:		0001389606-09-000020
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20090818
FILED AS OF DATE:		20090819
DATE AS OF CHANGE:		20090819

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FRENCH CHRISTOPHER E
		CENTRAL INDEX KEY:			0001120042

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23976
		FILM NUMBER:		091023156

	MAIL ADDRESS:	
		STREET 1:		PO BOX 459
		CITY:			EDINBURG
		STATE:			VA
		ZIP:			22824

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRST NATIONAL CORP /VA/
		CENTRAL INDEX KEY:			0000719402
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				541232965
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		112 WEST KING STREET
		CITY:			STRASBURG
		STATE:			VA
		ZIP:			22657
		BUSINESS PHONE:		5404659121

	MAIL ADDRESS:	
		STREET 1:		112 WEST KING STREET
		CITY:			STRASBURG
		STATE:			VA
		ZIP:			22657
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-08-18</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000719402</issuerCik>
        <issuerName>FIRST NATIONAL CORP /VA/</issuerName>
        <issuerTradingSymbol>FXNC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001120042</rptOwnerCik>
            <rptOwnerName>FRENCH CHRISTOPHER E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PO BOX 459</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>EDINBURG</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>22824</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-08-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>250</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>15.03</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>584</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Owns an additional 5,680 direct shares and 20,305 indirect shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Cassandra M. Smith</signatureName>
        <signatureDate>2009-08-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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