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

    <schemaVersion>X0706</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001421601</cik>
        <entityName>WESTMOUNTAIN INDEX ADVISOR INC</entityName>
        <issuerAddress>
            <street1>2186 S. HOLLY ST.</street1>
            <street2>SUITE 104</street2>
            <city>DENVER</city>
            <stateOrCountry>CO</stateOrCountry>
            <stateOrCountryDescription>COLORADO</stateOrCountryDescription>
            <zipCode>80222</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(303) 800-0678</issuerPhoneNumber>
        <jurisdictionOfInc>COLORADO</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2007</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>GREGORY</firstName>
                <middleName>L</middleName>
                <lastName>SCHIFRIN</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1336 W ELMIRA RD</street1>
                <city>SANDPOINT</city>
                <stateOrCountry>ID</stateOrCountry>
                <stateOrCountryDescription>IDAHO</stateOrCountryDescription>
                <zipCode>83864</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>JAMES</firstName>
                <middleName>G</middleName>
                <lastName>BAUGHMAN</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>C/O WESTMOUNTAIN INDEX ADVISOR, INC.</street1>
                <street2>2186 S. HOLLY ST., SUITE 104</street2>
                <city>DENVER</city>
                <stateOrCountry>CO</stateOrCountry>
                <stateOrCountryDescription>COLORADO</stateOrCountryDescription>
                <zipCode>80222</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>MARK</firstName>
                <middleName>E</middleName>
                <lastName>SCOTT</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>C/O WESTMOUNTAIN INDEX ADVISOR, INC.</street1>
                <street2>2186 S. HOLLY ST., SUITE 104</street2>
                <city>DENVER</city>
                <stateOrCountry>CO</stateOrCountry>
                <stateOrCountryDescription>COLORADO</stateOrCountryDescription>
                <zipCode>80222</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kevin</firstName>
                <lastName>Cassidy</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>C/O WESTMOUNTAIN INDEX ADVISOR, INC.</street1>
                <street2>2186 S. HOLLY ST., SUITE 104</street2>
                <city>DENVER</city>
                <stateOrCountry>CO</stateOrCountry>
                <stateOrCountryDescription>COLORADO</stateOrCountryDescription>
                <zipCode>80222</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mike</firstName>
                <lastName>Lavigne</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>C/O WESTMOUNTAIN INDEX ADVISOR, INC.</street1>
                <street2>2186 S. HOLLY ST., SUITE 104</street2>
                <city>DENVER</city>
                <stateOrCountry>CO</stateOrCountry>
                <stateOrCountryDescription>COLORADO</stateOrCountryDescription>
                <zipCode>80222</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2012-10-02</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>562500</totalOfferingAmount>
            <totalAmountSold>562500</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse>562,500 shares issued @ $1.00 totaling $562,500 as follows: F. Andres 100,000; R. Sletager 50,000; W. Andres 100,000; M. Macklin 102,500; D. &amp; D. Gullo 25,000; D. Rasmussen 25,000; A. Ruen 50,000; B. Ruen 50,000; J. Ossello 50,000; C. Kramer 10,000.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>10</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>WESTMOUNTAIN INDEX ADVISOR INC</issuerName>
                <signatureName>/s/ Mark Scott</signatureName>
                <nameOfSigner>Mark Scott</nameOfSigner>
                <signatureTitle>CFO</signatureTitle>
                <signatureDate>2012-10-31</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
