-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 EGGby4omhvo4XKPyejyKrg==

<SEC-DOCUMENT>0001277277-05-000581.txt : 20050623
<SEC-HEADER>0001277277-05-000581.hdr.sgml : 20050623
<ACCEPTANCE-DATETIME>20050623172255
ACCESSION NUMBER:		0001277277-05-000581
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050621
FILED AS OF DATE:		20050623
DATE AS OF CHANGE:		20050623

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WASHINGTON MUTUAL INC
		CENTRAL INDEX KEY:			0000933136
		STANDARD INDUSTRIAL CLASSIFICATION:	SAVINGS INSTITUTION, FEDERALLY CHARTERED [6035]
		IRS NUMBER:				911653725
		STATE OF INCORPORATION:			WA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1201 THIRD AVE
		STREET 2:		STE 1500
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98101
		BUSINESS PHONE:		2064612000

	MAIL ADDRESS:	
		STREET 1:		1201 THIRD AVE
		STREET 2:		SUITE 1500
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98101

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FARRELL ANNE V
		CENTRAL INDEX KEY:			0001077983

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14667
		FILM NUMBER:		05913228

	BUSINESS ADDRESS:	
		STREET 1:		425 PIKE ST
		STREET 2:		SUITE 510
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98101
		BUSINESS PHONE:		2066227673

	MAIL ADDRESS:	
		STREET 1:		1000 SECOND AVE
		STREET 2:		SUITE 3700
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98101
</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>2005-06-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000933136</issuerCik>
        <issuerName>WASHINGTON MUTUAL INC</issuerName>
        <issuerTradingSymbol>WM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001077983</rptOwnerCik>
            <rptOwnerName>FARRELL ANNE V</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1201 THIRD AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 4800</rptOwnerStreet2>
            <rptOwnerCity>SEATTLE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98104</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Phantom Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0</value>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-06-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>212.64</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>41.15</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>212.64</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2256.54</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Phantom stock shares acquired under the Washington Mutual, Inc. Deferred Compensation Plan for Directors and Certain Highly Compensated Employees (DCP) through quarterly deferral of retainer.</footnote>
        <footnote id="F2">Converts to common stock on a one-for-one basis.</footnote>
        <footnote id="F3">Phantom stock distributed upon payment commencement date selected by reporting person.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Sophie Hager Hume, Attorney-in-Fact for Anne V. Farrell</signatureName>
        <signatureDate>2005-06-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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