-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 GHfZf/KxYqSiATBEVgDJRwbGgs1Q39tEY2ccPvM2jtFVkeVflaThCJcFFndB8bTg
 Tt4dlc40dZ3dQftfJmmA7w==

<SEC-DOCUMENT>0001227063-07-000001.txt : 20070118
<SEC-HEADER>0001227063-07-000001.hdr.sgml : 20070118
<ACCEPTANCE-DATETIME>20070118150208
ACCESSION NUMBER:		0001227063-07-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070116
FILED AS OF DATE:		20070118
DATE AS OF CHANGE:		20070118

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AK STEEL HOLDING CORP
		CENTRAL INDEX KEY:			0000918160
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL WORKS, BLAST FURNACES  ROLLING MILLS (COKE OVENS) [3312]
		IRS NUMBER:				311401455
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		703 CURTIS ST
		CITY:			MIDDLETOWN
		STATE:			OH
		ZIP:			45043
		BUSINESS PHONE:		5134255000

	MAIL ADDRESS:	
		STREET 1:		703 CURTIS ST
		CITY:			MIDDLETOWN
		STATE:			OH
		ZIP:			45043

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WAINSCOTT JAMES L
		CENTRAL INDEX KEY:			0001227063

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13696
		FILM NUMBER:		07537621

	MAIL ADDRESS:	
		STREET 1:		C/O AK STEEL HOLDING CORP
		STREET 2:		703 CURTIS ST
		CITY:			MIDDLETOWN
		STATE:			OH
		ZIP:			45043
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-01-16</periodOfReport>

    <issuer>
        <issuerCik>0000918160</issuerCik>
        <issuerName>AK STEEL HOLDING CORP</issuerName>
        <issuerTradingSymbol>AKS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001227063</rptOwnerCik>
            <rptOwnerName>WAINSCOTT JAMES L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O AK STEEL HOLDING CORP</rptOwnerStreet1>
            <rptOwnerStreet2>703 CURTIS ST.</rptOwnerStreet2>
            <rptOwnerCity>MIDDLETOWN</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>45043</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairman, President &amp; CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-01-16</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5696</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>17.035</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>324077</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-01-17</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2226</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>17.035</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>321851</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Roger Newport Attorney in fact for James L. Wainscott</signatureName>
        <signatureDate>2007-01-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----