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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2019-03-26</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001704299</issuerCik>
        <issuerName>TORTOISE ESSENTIAL ASSETS INCOME TERM FUND</issuerName>
        <issuerTradingSymbol>TEAF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001444607</rptOwnerCik>
            <rptOwnerName>THUMMEL ROBERT JOSEPH JR.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O TEAF</rptOwnerStreet1>
            <rptOwnerStreet2>11550 ASH STREET, SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>LEAWOOD</rptOwnerCity>
            <rptOwnerState>KS</rptOwnerState>
            <rptOwnerZipCode>66211</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>MEMBER OF INVESTMENT COMMITTEE</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>^ Director of Tortoise Capital Advisors, L.L.C., Tortoise Credit Strategies, LLC and Tortoise Advisors UK Limited and Member of Investment Committee with respect to the Fund.</remarks>

    <ownerSignature>
        <signatureName>/s/Robert J. Thummel, Jr.</signatureName>
        <signatureDate>2019-03-26</signatureDate>
    </ownerSignature>
</ownershipDocument>
