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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 Rjs2WapqcZlXOAoI9Z0Yo9VbOtgEIWNOuaaIICsWp74riK3dFWkq9HMSE0re4TKI
 y6TXvNCSGWlvoGe3vd0N7A==

<SEC-DOCUMENT>0001068875-05-000013.txt : 20050510
<SEC-HEADER>0001068875-05-000013.hdr.sgml : 20050510
<ACCEPTANCE-DATETIME>20050510161610
ACCESSION NUMBER:		0001068875-05-000013
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050509
FILED AS OF DATE:		20050510
DATE AS OF CHANGE:		20050510

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			INFOSPACE INC
		CENTRAL INDEX KEY:			0001068875
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				911718107
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		601 108TH AVE NE
		STREET 2:		SUITE 1200
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98004
		BUSINESS PHONE:		4258821602

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INFOSPACE COM INC
		DATE OF NAME CHANGE:	19980824

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TRONSRUE GEORGE M III
		CENTRAL INDEX KEY:			0001021004

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25131
		FILM NUMBER:		05816891

	BUSINESS ADDRESS:	
		STREET 1:		601 108TH AVENUE NE STE 1200
		CITY:			BELLEVUE
		STATE:			WA
		ZIP:			98004
		BUSINESS PHONE:		4252018100

	MAIL ADDRESS:	
		STREET 1:		AMERICAN COMMUNICATIONS SERVICES INC
		STREET 2:		301 NATIONAL BUSINESS PKWY
		CITY:			ANNAPOLIS
		STATE:			MD
		ZIP:			20701
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>tro203.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-05-09</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001068875</issuerCik>
        <issuerName>INFOSPACE INC</issuerName>
        <issuerTradingSymbol>INSP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001021004</rptOwnerCik>
            <rptOwnerName>TRONSRUE GEORGE M III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>601 108TH AVENUE NE, SUITE 1200</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BELLEVUE</rptOwnerCity>
            <rptOwnerState>WA</rptOwnerState>
            <rptOwnerZipCode>98004</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Non-Employee Director Grant 5/9/05 (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>30.6500</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-05-09</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2006-05-09</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2012-05-09</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Received as a non-employee Director Grant of non-qualified stock options.  Options become fully vested and exerciable 1 year from grant date assuming continued service on the Board for such period.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>By: Alejandro C. Torres, Attorney-in-Fact</signatureName>
        <signatureDate>2005-05-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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