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<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2011-05-06</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000923284</issuerCik>
        <issuerName>INLAND REAL ESTATE CORP</issuerName>
        <issuerTradingSymbol>IRC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001119191</rptOwnerCik>
            <rptOwnerName>GOODWIN DANIEL L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2901 BUTTERFIELD RD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>OAK BROOK</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60523</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-05-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>20000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.0995</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11327918</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-05-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>20000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.0995</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11347918</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Purchased by Eagle Financial</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-05-06</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.0995</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>11357918</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Purchased by Inland Diversified</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Includes shares of IRC that are owned by Inland American Real Estate Trust, Inc. (&quot;American&quot;), Inland Western Retail Real Estate Trust, Inc. (&quot;Western&quot;) and Inland Diversified Real Estate Trust, Inc. (&quot;Diversified&quot;) in accounts managed by Inland Investment Advisors, Inc. (&quot;IIAI&quot;). Mr. Goodwin directly and indirectly beneficially owns shares of American, Western and Diversified and disclaims beneficial ownership of shares owned by American, Western and Diversified except to the extent of his respective ownership of those entities.</footnote>
        <footnote id="F2">Includes 1,419,090 shares of common stock owned by Mr. Goodwin and/or his spouse. Also includes common stock owned directly by the following entities: 843,820 by American; 315,820 by Western; 70,000 by Diversified; 9,091 by The Inland Group, Inc. (&quot;TIGI&quot;); 192,540 by IMIC Stock Holding Company (&quot;IMIC&quot;);7,212,118 by Inland Investment Stock Holding Company (&quot;IISHC&quot;); 137,110 by Partnership Ownership Corporation (&quot;POC&quot;); and 1,158,329 by Eagle Financial Corp.  The latter four entities and Inland Real Estate Investment Corp (&quot;IREIC&quot;) are wholly owned subsidiaries of TIGI.  IIAI, IISHC and POC are wholly owned subsidiaries of IREIC.  Mr Goodwin is the controlling shareholder of TIGI and he disclaims beneficial ownership of shares owned by TIGI and its subsidiaries except to the extent of his respective ownership of those entities.</footnote>
        <footnote id="F3">Total includes the purchase of additional shares of common stock acquired through Dividend Reinvestment by the following: 6,685 shares at $9.36 on 3/17/2011 and 7,148 shares at $9.24 on 4/18/2011 by Mr. Goodwin; 5,377 shares at $9.36 on 3/17/2011 and 5,817 shares at $9.24 on 4/18/2011 by Eagle Financial; and 938 shares at $9.26 on 3/17/2011 by IMIC.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/Daniel L. Goodwin</signatureName>
        <signatureDate>2011-05-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
