<SUBMISSION>
<ACCESSION-NUMBER>0001209191-07-012831
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20070221
<FILING-DATE>20070223
<DATE-OF-FILING-DATE-CHANGE>20070223
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>Triangle Capital CORP
<CIK>0001379785
<IRS-NUMBER>061798488
<STATE-OF-INCORPORATION>MD
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>3600 GLENWOOD AVENUE
<STREET2>SUITE 104
<CITY>RALEIGH
<STATE>NC
<ZIP>27612
<PHONE>9197194770
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>3600 GLENWOOD AVENUE
<STREET2>SUITE 104
<CITY>RALEIGH
<STATE>NC
<ZIP>27612
</MAIL-ADDRESS>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Parker David F
<CIK>0001389377
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-33130
<FILM-NUMBER>07644626
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>(919) 719-4770
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>3600 GLENWOOD AVENUE
<STREET2>SUITE 104
<CITY>RALEIGH
<STATE>NC
<ZIP>27612
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>bna05693_bna01dp.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-02-21</periodOfReport>

    <issuer>
        <issuerCik>0001379785</issuerCik>
        <issuerName>Triangle Capital CORP</issuerName>
        <issuerTradingSymbol>TCAP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001389377</rptOwnerCik>
            <rptOwnerName>Parker David F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3600 GLENWOOD AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 104</rptOwnerStreet2>
            <rptOwnerCity>RALEIGH</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>27612</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Managing Director</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-02-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>69000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>69000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-02-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7467</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7467</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By LLC</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Shares acquired in exchange for general partnership interests in Triangle Mezzanine Fund, LLLP (the &quot;Fund&quot;) as part of the formation transactions in connection with the Issuer's initial public offering. As part of the formation transactions, the Fund became a wholly owned subsidiary of the Issuer.</footnote>
        <footnote id="F2">Shares acquired in exchange for limited partnership interests in the Fund as part of the formation transactions in connection with the Issuer's initial public offering. As part of the formation transactions, the Fund became a wholly owned subsidiary of the Issuer.</footnote>
        <footnote id="F3">Shares beneficailly owned represent reporting person's pro rata ownership interest in a limited liability company.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Helen W. Brown, Attorney-in-Fact for David F. Parker</signatureName>
        <signatureDate>2007-02-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
