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

    <documentType>4</documentType><periodOfReport>2003-04-23</periodOfReport>
    <issuer>
        <issuerCik>0000750199</issuerCik>
        <issuerName>ENERGY PARTNERS LTD</issuerName>
        <issuerTradingSymbol>EPL</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001070028</rptOwnerCik>
            <rptOwnerName>GERSHEN ROBERT D</rptOwnerName>
        </reportingOwnerId>
<reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000933758</rptOwnerCik>
            <rptOwnerName>ENERGY INCOME FUND LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>136 DWIGHT ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LONGMEADOW</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01106</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-04-23</value><footnoteId id="F1"/></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>861863</value></transactionShares><transactionPricePerShare><value>9.50</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>3827662</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value><footnoteId id="F4"/></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-05-02</value><footnoteId id="F2"/></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>339806</value></transactionShares><transactionPricePerShare><value>9.50</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>3487856</value><footnoteId id="F3"/></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value><footnoteId id="F4"/></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes><footnote id="F1">Pursuant to a secondary offering of Energy Partners, Ltd., in which Energy Income Fund was a selling stockholder.</footnote><footnote id="F2">Pursuant to an over-allotment option granted by Energy Income Fund to the underwriters in connection with the secondary offering of Energy Partners, Ltd.</footnote><footnote id="F3"> As of October 13, 2003, Mr. Gershen was the direct beneficial owner of 10,636 shares of Energy Partners, Ltd. Common Stock. </footnote><footnote id="F4">This Form 4 is filed jointly by Robert D. Gershen and Energy Income Fund.  Mr. Gershen is a director of the issuer and deemed a 10% owner of the issuer, and Energy Income Fund is a 10% owner of the issuer.  The securities reported in Table I are owned directly by Energy Income Fund, and owned indirectly by Mr. Gershen by virtue of his position as the managing director of the general partner of Energy Income Fund.  Mr. Gershen disclaims beneficial ownership of the shares owned by Energy Income Fund except to the extent of his pecuniary interest therein.</footnote></footnotes><remarks/><ownerSignature><signatureName>Robert D. Gershen for each reporting person</signatureName><signatureDate>2003-10-13</signatureDate></ownerSignature></ownershipDocument>

