-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 FVb/rH7E952gITxRTOeiiaYrI4dMWRXYSt1d7mGL3jViUHnJr79ZafTLQK/mS2H+
 cZlmC0UTgznlev71bG9pMw==

<SEC-DOCUMENT>0001209191-11-006865.txt : 20110203
<SEC-HEADER>0001209191-11-006865.hdr.sgml : 20110203
<ACCEPTANCE-DATETIME>20110203174855
ACCESSION NUMBER:		0001209191-11-006865
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20110201
FILED AS OF DATE:		20110203
DATE AS OF CHANGE:		20110203

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hawk Don
		CENTRAL INDEX KEY:			0001399547

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33472
		FILM NUMBER:		11571766

	MAIL ADDRESS:	
		STREET 1:		C/O TECHTARGET, INC.
		STREET 2:		117 KENDRICK STREET, SUITE 800
		CITY:			NEEDHAM
		STATE:			MA
		ZIP:			02494

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TechTarget Inc
		CENTRAL INDEX KEY:			0001293282
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
		IRS NUMBER:				043483216

	BUSINESS ADDRESS:	
		STREET 1:		275 GROVE STREET
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02466
		BUSINESS PHONE:		617-431-9200

	MAIL ADDRESS:	
		STREET 1:		275 GROVE STREET
		CITY:			NEWTON
		STATE:			MA
		ZIP:			02466
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2011-02-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001293282</issuerCik>
        <issuerName>TechTarget Inc</issuerName>
        <issuerTradingSymbol>TTGT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001399547</rptOwnerCik>
            <rptOwnerName>Hawk Don</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O TECHTARGET, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>275 GROVE STREET</rptOwnerStreet2>
            <rptOwnerCity>NEWTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02466</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-02-01</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>20000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>7.25</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>162889</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The reported sale was made automatically pursuant to a trading plan entered into by the reporting person purusant to Rule 10b5-1 under the Securities Exchange Act of 1934.</footnote>
        <footnote id="F2">The reported transactions were executed at sales prices ranging from $7.16 to $7.41. The reporting person undertakes to provide, upon request by the SEC staff, TechTarget, Inc. or any security holder of TechTarget, Inc. the full information regarding the number of shares sold at each seperate price.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Rick Olin, Attorney-in-fact</signatureName>
        <signatureDate>2011-02-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----