<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-08-29</periodOfReport>
    <issuer>
        <issuerCik>0000909990</issuerCik>
        <issuerName>WILD OATS MARKETS INC</issuerName>
        <issuerTradingSymbol>OATS</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001189599</rptOwnerCik>
            <rptOwnerName>SHIELDS JOHN A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2749 LANDON ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SHAKER HEIGHTS</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>44122</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Option to Buy </value><footnoteId id="F1"/></securityTitle><conversionOrExercisePrice><value>10.098</value></conversionOrExercisePrice><transactionDate><value>2003-08-29</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>2806</value></transactionShares><transactionPricePerShare><value>10.098</value><footnoteId id="F2"/></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2003-08-29</value></exerciseDate><expirationDate><value>2013-08-29</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>2806</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>2806</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Option is the right to buy Common Stock.</footnote><footnote id="F2">The Filer elects to accept options to purchase the Company's Common Stock in lieu of cash payment for participation in Board meetings.  Options in lieu of cash payments are granted at 85% of the current market value on the day of the grant.</footnote></footnotes><remarks/><ownerSignature><signatureName>Freya R. Brier, as attorney-in-fact for John A. Shields</signatureName><signatureDate>2003-08-29</signatureDate></ownerSignature></ownershipDocument>

