-----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,
 HAreeKrilY7rUhO6MKX2cNtDfl6+VAQWYLEY39RfT8df3UjrwRxNs4UIxEvinGXA
 AZ6kFJhjzRf7ak5INddRyQ==

<SEC-DOCUMENT>0001236304-04-000047.txt : 20041021
<SEC-HEADER>0001236304-04-000047.hdr.sgml : 20041021
<ACCEPTANCE-DATETIME>20041021165811
ACCESSION NUMBER:		0001236304-04-000047
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20041020
FILED AS OF DATE:		20041021
DATE AS OF CHANGE:		20041021

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Lawrence Sandra AJ
		CENTRAL INDEX KEY:			0001306386

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03523
		FILM NUMBER:		041090100

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		785-575-1625

	MAIL ADDRESS:	
		STREET 1:		818 S KANSAS AVENUE
		CITY:			TOPEKA
		STATE:			KS
		ZIP:			66612

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WESTAR ENERGY INC /KS
		CENTRAL INDEX KEY:			0000054507
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
		IRS NUMBER:				480290150
		STATE OF INCORPORATION:			KS
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		818 KANSAS AVE
		CITY:			TOPEKA
		STATE:			KS
		ZIP:			66612
		BUSINESS PHONE:		7855756300

	MAIL ADDRESS:	
		STREET 1:		P.O. BOX 889
		CITY:			TOPEKA
		STATE:			KS
		ZIP:			66601

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WESTERN RESOURCES INC /KS
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KANSAS POWER & LIGHT CO
		DATE OF NAME CHANGE:	19920507
</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>2004-10-20</periodOfReport>

    <issuer>
        <issuerCik>0000054507</issuerCik>
        <issuerName>WESTAR ENERGY INC /KS</issuerName>
        <issuerTradingSymbol>WR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001306386</rptOwnerCik>
            <rptOwnerName>Lawrence Sandra AJ</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>818 S. KANSAS AVE.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>TOPEKA</rptOwnerCity>
            <rptOwnerState>KS</rptOwnerState>
            <rptOwnerZipCode>66612</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, Par Value $5.00</value>
            </securityTitle>
            <transactionDate>
                <value>2004-10-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>183</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>183</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, Par Value $5.00</value>
            </securityTitle>
            <transactionDate>
                <value>2004-10-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>187</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>370</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Stock award received as a partial retainer fee.</footnote>
        <footnote id="F2">Restricted share units received as a partial retainer fee.  The units vest ratably by one-third on each anniversary date of the grant date for three years.</footnote>
        <footnote id="F3">Includes 187 restricted share units that are subject to forfeiture.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Cynthia S. Couch by power of attorney</signatureName>
        <signatureDate>2004-10-21</signatureDate>
    </ownerSignature>
</ownershipDocument>

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