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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0000720671-04-000031.txt : 20041001
<SEC-HEADER>0000720671-04-000031.hdr.sgml : 20041001
<ACCEPTANCE-DATETIME>20041001160248
ACCESSION NUMBER:		0000720671-04-000031
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040930
FILED AS OF DATE:		20041001
DATE AS OF CHANGE:		20041001

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Whiteside Larry L
		CENTRAL INDEX KEY:			0001304799

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08964
		FILM NUMBER:		041058809

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		703-750-2202

	MAIL ADDRESS:	
		STREET 1:		C/O HALIFAX CORPORATION
		STREET 2:		5250 CHEROKEE AVENUE
		CITY:			ALEXANDRIA
		STATE:			VA
		ZIP:			22312

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HALIFAX CORP
		CENTRAL INDEX KEY:			0000720671
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC. [7370]
		IRS NUMBER:				540829246
		STATE OF INCORPORATION:			VA
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		5250 CHEROKEE AVE
		CITY:			ALEXANDRIA
		STATE:			VA
		ZIP:			22312
		BUSINESS PHONE:		7037502202

	MAIL ADDRESS:	
		STREET 1:		5250 CHEROKEE AVENUE
		CITY:			ALEXANDRIA
		STATE:			VA
		ZIP:			22312

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	HALIFAX ENGINEERING INC/VA
		DATE OF NAME CHANGE:	19911204
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-09-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000720671</issuerCik>
        <issuerName>HALIFAX CORP</issuerName>
        <issuerTradingSymbol>hx</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001304799</rptOwnerCik>
            <rptOwnerName>Whiteside Larry L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O HALIFAX CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>5250 CHEROKEE AVENUE</rptOwnerStreet2>
            <rptOwnerCity>ALEXANDRIA</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>22312</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Halifax Corporation Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-09-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>108597</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.1</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>108597</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Received in exchange for 18,000 shares of Alpha National Technology Services, Inc. (&quot;AlphaNational&quot;) in connection with the merger of AlphaNational with and into Halifax Corporation (&quot;Halifax&quot;) on September 30, 2004 (the &quot;Merger&quot;).  The number of Halifax Shares received was determined by multiplying Mr. Whiteside's percentage ownership interest in AlphaNational by the aggregate number of Halifax shares to be issued in connection with the Merger.  The aggregate number of Halifax shares to be issued in connection with the Merger was determined by dividing $1,200,000 by $5.10, which price represents the greater of (i) the closing price of Halifax's shares as of the closing date of the Merger and (ii) the average market price of Halifax's shares over the fifteen trading days immediately preceding the closing date.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Larry L. Whiteside</signatureName>
        <signatureDate>2004-10-01</signatureDate>
    </ownerSignature>
</ownershipDocument>

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