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

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2011-04-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001286225</issuerCik>
        <issuerName>REALPAGE INC</issuerName>
        <issuerTradingSymbol>RP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001211905</rptOwnerCik>
            <rptOwnerName>BERKELEY RICHARD M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CAMDEN PARTNERS STRATEGIC MGR LLC,</rptOwnerStreet1>
            <rptOwnerStreet2>500 E. PRATT STREET, SUITE 1200</rptOwnerStreet2>
            <rptOwnerCity>BALTIMORE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001283497</rptOwnerCik>
            <rptOwnerName>CAMDEN PARTNERS STRATEGIC FUND III LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CAMDEN PARTNERS STRATEGIC MGR LLC</rptOwnerStreet1>
            <rptOwnerStreet2>500 E. PRATT STREET, SUITE 1200</rptOwnerStreet2>
            <rptOwnerCity>BALTIMORE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001283498</rptOwnerCik>
            <rptOwnerName>CAMDEN PARTNERS STRATEGIC FUND III-A LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CAMDEN PARTNERS STRATEGIC MGR LLC</rptOwnerStreet1>
            <rptOwnerStreet2>500 E. PRATT STREET, SUITE 1200</rptOwnerStreet2>
            <rptOwnerCity>BALTIMORE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001317017</rptOwnerCik>
            <rptOwnerName>Camden Partners Strategic III, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CAMDEN PARTNERS STRATEGIC MGR LLC</rptOwnerStreet1>
            <rptOwnerStreet2>500 E. PRATT STREET, SUITE 1200</rptOwnerStreet2>
            <rptOwnerCity>BALTIMORE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001365552</rptOwnerCik>
            <rptOwnerName>Camden Partners Strategic Manager, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CAMDEN PARTNERS STRATEGIC MGR LLC</rptOwnerStreet1>
            <rptOwnerStreet2>500 E. PRATT STREET, SUITE 1200</rptOwnerStreet2>
            <rptOwnerCity>BALTIMORE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001211899</rptOwnerCik>
            <rptOwnerName>HUGHES DONALD W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CAMDEN PARTNERS STRATEGIC MGR LLC</rptOwnerStreet1>
            <rptOwnerStreet2>500 E. PRATT STREET, SUITE 1200</rptOwnerStreet2>
            <rptOwnerCity>BALTIMORE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001211913</rptOwnerCik>
            <rptOwnerName>JOHNSTON RICHARD M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CAMDEN PARTNERS STRATEGIC MGR LLC</rptOwnerStreet1>
            <rptOwnerStreet2>500 E. PRATT STREET, SUITE 1200</rptOwnerStreet2>
            <rptOwnerCity>BALTIMORE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21202</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001025664</rptOwnerCik>
            <rptOwnerName>WARNOCK DAVID L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CAMDEN PARTNERS STRATEGIC MGR LLC</rptOwnerStreet1>
            <rptOwnerStreet2>500 E. PRATT STREET, SUITE 1200</rptOwnerStreet2>
            <rptOwnerCity>BALTIMORE</rptOwnerCity>
            <rptOwnerState>MD</rptOwnerState>
            <rptOwnerZipCode>21202</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>2011-04-01</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3507</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3507</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1809908</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>75254</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>42500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>42500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Restricted Stock awarded to Richard M. Berkeley on April 1, 2011. 6.25% of the shares shall vest each quarter, beginning on the first day of the calendar quarter immediately following the vesting commencement date, for sixteen (16) consecutive calendar quarters.</footnote>
        <footnote id="F2">Reported securities are directly held by Fund III.  CPSM, CPS III and the Managing Members may be deemed indirect beneficial owners of the securities held directly by Fund III as a result of their relationships described in the Remarks. CPSM, CPS III and each of the Managing Members disclaims beneficial ownership of the securities held directly by Fund III, except to the extent of its or his pecuniary interest therein. Each of Fund III and Fund III-A disclaims beneficial onwership of the securities held by the other.</footnote>
        <footnote id="F3">Reported securities are directly held by Fund III-A. CPSM, CPS III and the Managing Members may be deemed indirect beneficial owners of the securities held directly by Fund III-A as a result of their relationships described in the Remarks. CPSM, CPS III and each of the Managing Members disclaims beneficial ownership of the securities held directly by Fund III-A, except to the extent of its or his pecuniary interest therein. Each of Fund III and Fund III-A disclaims beneficial onwership of the securities held by the other.</footnote>
        <footnote id="F4">These securities are held in trust for the benefit of the children of Richard M. Berkeley's brother. Richard M. Berkeley is a trustee of the trust. Richard M. Berkeley disclaims beneficial ownership of the reported securities and the inclusion of these securities in this report shall not be deemed an admission that Richard M. Berkeley is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.</footnote>
        <footnote id="F5">These securities are held in trust for the benefit of the family of Richard M. Berkeley's brother. Richard M. Berkeley is a trustee of the trust.  Richard M. Berkeley disclaims beneficial ownership of the reported securities  and the inclusion of these securities in this report shall not be deemed an admission that Richard M. Berkeley is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.</footnote>
    </footnotes>

    <remarks>Richard M. Berkeley is a director of the Issuer.  This Form 4 is being filed jointly by Camden Partners Strategic Manager, LLC (&quot;CPSM&quot;),
Camden Partners Strategic III, LLC (&quot;CPS III&quot;), Camden Partners Strategic Fund III, L.P. (&quot;Fund III&quot;),
Camden Partners Strategic Fund III-A, L.P. (&quot;Fund III-A&quot;) and Messrs. David L. Warnock, Donald W. Hughes, Richard M.
Johnston and Richard M. Berkeley (collectively, the &quot;Managing Members&quot; and together with CPSM, CPS III, Fund III and Fund
III-A, the &quot;Reporting Persons&quot;).  The Managing Members are the managing members of CPSM, which is the Managing Member of
CPS III.  CPS III is the general partner of Fund III and Fund III-A.</remarks>

    <ownerSignature>
        <signatureName>/s/ Donald W. Hughes, Attorney-in-Fact for Richard M. Berkeley</signatureName>
        <signatureDate>2011-04-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ By Camden Partners Strategic III, LLC, By Camden Partners Strategic Manager, LLC, By Donald W. Hughes, Managing Member</signatureName>
        <signatureDate>2011-04-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ By Camden Partners Strategic III, LLC, By Camden Partners Strategic Manager, LLC, By Donald W. Hughes, Managing Member</signatureName>
        <signatureDate>2011-04-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ By Camden Partners Strategic Manager, LLC, By Donald W. Hughes, Managing Member</signatureName>
        <signatureDate>2011-04-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ By Donald W. Hughes, Managing Member</signatureName>
        <signatureDate>2011-04-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Donald W. Hughes</signatureName>
        <signatureDate>2011-04-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Donald W. Hughes, Attorney-in-Fact for Richard M. Johnston</signatureName>
        <signatureDate>2011-04-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Donald W. Hughes, Attorney-in-Fact for David L. Warnock</signatureName>
        <signatureDate>2011-04-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
