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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CM2LyeGT7QehpadMaw9gHbPkQvmA/JGMuNxLe1QV14p5u19/mTUKbKsedjDH4yLs
 hK52ZVvSPRgPoPwfAGbWhw==

<SEC-DOCUMENT>0001236304-06-000027.txt : 20060411
<SEC-HEADER>0001236304-06-000027.hdr.sgml : 20060411
<ACCEPTANCE-DATETIME>20060411140429
ACCESSION NUMBER:		0001236304-06-000027
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060410
FILED AS OF DATE:		20060411
DATE AS OF CHANGE:		20060411

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			IRICK LARRY D
		CENTRAL INDEX KEY:			0001236086

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03523
		FILM NUMBER:		06753272

	BUSINESS ADDRESS:	
		STREET 1:		C/O WWESTERN RESOURCES INC
		STREET 2:		818 SOUTH KANSAS AVENUE
		CITY:			TOPEKA
		STATE:			KS
		ZIP:			66612
		BUSINESS PHONE:		785-575-1617

	MAIL ADDRESS:	
		STREET 1:		C/O WESTAR ENERGY INC
		STREET 2:		818 SOUTH KANSAS AVENUE
		CITY:			TOPEKA
		STATE:			KS
		ZIP:			66612
</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>2006-04-10</periodOfReport>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001236086</rptOwnerCik>
            <rptOwnerName>IRICK LARRY D</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>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, Gen Counsel and Corp Sec</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, Par Value $5.00</value>
            </securityTitle>
            <transactionDate>
                <value>2006-04-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5758</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>21.125</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>53459</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, Par Value $5.00</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>977</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held in 401(k) Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, Par Value $5.00</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>935</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Spouse</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">5,758 shares were forfeited for the payment of taxes due upon the vesting and distribution of 18,000 restricted share units granted to the Reporting Person under the Issuer's Long Term Incentive and Share Award Plan. The grant of the restricted share units was previously reported in a Form 4 filed by the Reporting Person.</footnote>
        <footnote id="F2">Includes 7 shares acquired through the reinvestment of dividends.</footnote>
        <footnote id="F3">Includes 11 shares acquired through the reinvestment of dividends.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Cynthia S. Couch by power of attorney</signatureName>
        <signatureDate>2006-04-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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