<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2013-05-30</periodOfReport>

    <issuer>
        <issuerCik>0000729237</issuerCik>
        <issuerName>PARKWAY PROPERTIES INC</issuerName>
        <issuerTradingSymbol>PKY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001326479</rptOwnerCik>
            <rptOwnerName>Casal Edward Manuel</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>390 NORTH ORANGE AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 2400</rptOwnerStreet2>
            <rptOwnerCity>ORLANDO</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>32801</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</value>
            </securityTitle>
            <transactionDate>
                <value>2013-05-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2858</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9449.749</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Includes an additional 209.749 shares acquired by the Reporting Person as a result of the reinvestment of dividends pursuant to the Company's Employee Stock Purchase Plan and the Company's Dividend Reinvestment Plan.  These transactions are exempt from Section 16(a) of the Securities and Exchange Act pursuant to Rule 16a-3(f)(1)(i)(B).</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jeremy Dorsett, on behalf of Edward Casal as Attorney-in-fact</signatureName>
        <signatureDate>2013-05-31</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0306
4
2013-05-30
0000729237
PARKWAY PROPERTIES INC
PKY
0001326479
Casal Edward Manuel
390 NORTH ORANGE AVENUE
SUITE 2400
ORLANDO
FL
32801
1
0
0
0
Common Stock
2013-05-30
4
A
0
2858
0
A
9449.749
D
Includes an additional 209.749 shares acquired by the Reporting Person as a result of the reinvestment of dividends pursuant to the Company's Employee Stock Purchase Plan and the Company's Dividend Reinvestment Plan.  These transactions are exempt from Section 16(a) of the Securities and Exchange Act pursuant to Rule 16a-3(f)(1)(i)(B).
/s/ Jeremy Dorsett, on behalf of Edward Casal as Attorney-in-fact
2013-05-31