    <SEC-DOCUMENT>0001140361-21-014441-index.html : 20210427
    <SEC-HEADER>0001140361-21-014441.hdr.sgml : 20210427
    <ACCEPTANCE-DATETIME>20210427122928
    ACCESSION NUMBER:		0001140361-21-014441
    CONFORMED SUBMISSION TYPE:	424B3
    PUBLIC DOCUMENT COUNT:		12
    FILED AS OF DATE:		20210427
    DATE AS OF CHANGE:		20210427

    FILER:

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

    	FILING VALUES:
    		FORM TYPE:		424B3
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-255180
    		FILM NUMBER:		21857496

    	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>424B3
    <SEQUENCE>1
    <FILENAME>nt10022733x4_424b3.htm
    <DESCRIPTION>424B3
    <TEXT>
    Document 1 - file: nt10022733x4_424b3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>header_pipersandler.jpg
    <TEXT>
    Document 2 - file: header_pipersandler.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>logo_firstnationalcorp.jpg
    <TEXT>
    Document 3 - file: logo_firstnationalcorp.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>logo_firstnationalcorpx1.jpg
    <TEXT>
    Document 4 - file: logo_firstnationalcorpx1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>logo_rffinanciallc.jpg
    <TEXT>
    Document 5 - file: logo_rffinanciallc.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>logo_thebankoffincastle.jpg
    <TEXT>
    Document 6 - file: logo_thebankoffincastle.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>logo_thebankoffincastlex1.jpg
    <TEXT>
    Document 7 - file: logo_thebankoffincastlex1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>logo_yhb.jpg
    <TEXT>
    Document 8 - file: logo_yhb.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>nt10022733x4_footer.jpg
    <TEXT>
    Document 9 - file: nt10022733x4_footer.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>sig_pipersandler2.jpg
    <TEXT>
    Document 10 - file: sig_pipersandler2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>sig_rpfinanciallc.jpg
    <TEXT>
    Document 11 - file: sig_rpfinanciallc.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>sig_yhbpc.jpg
    <TEXT>
    Document 12 - file: sig_yhbpc.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>