<SEC-DOCUMENT>0001209191-17-024665.txt : 20170404
<SEC-HEADER>0001209191-17-024665.hdr.sgml : 20170404
<ACCEPTANCE-DATETIME>20170404160542
ACCESSION NUMBER:		0001209191-17-024665
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170403
FILED AS OF DATE:		20170404
DATE AS OF CHANGE:		20170404

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Triangle Capital CORP
		CENTRAL INDEX KEY:			0001379785
		IRS NUMBER:				061798488
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3700 GLENWOOD AVENUE
		STREET 2:		SUITE 530
		CITY:			RALEIGH
		STATE:			NC
		ZIP:			27612
		BUSINESS PHONE:		9197194770

	MAIL ADDRESS:	
		STREET 1:		3700 GLENWOOD AVENUE
		STREET 2:		SUITE 530
		CITY:			RALEIGH
		STATE:			NC
		ZIP:			27612

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Dunwoody W McComb
		CENTRAL INDEX KEY:			0001389490

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	814-00733
		FILM NUMBER:		17738119

	MAIL ADDRESS:	
		STREET 1:		3600 GLENWOOD AVENUE
		STREET 2:		SUITE 104
		CITY:			RALEIGH
		STATE:			NC
		ZIP:			27612
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-04-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001389490</rptOwnerCik>
            <rptOwnerName>Dunwoody W McComb</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3700 GLENWOOD AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 530</rptOwnerStreet2>
            <rptOwnerCity>RALEIGH</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>27612</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>2017-04-03</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>49286</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.8592</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>106278</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $18.78 to $19.04, inclusive. The reporting person undertakes to provide to Triangle Capital Corporation, any security holder of Triangle Capital Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Harry S. Pangas, attorney-in-fact for W. McComb Dunwoody</signatureName>
        <signatureDate>2017-04-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
