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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-10-07</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000083246</issuerCik>
        <issuerName>HSBC USA INC /MD/</issuerName>
        <issuerTradingSymbol>HUSI PR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001523521</rptOwnerCik>
            <rptOwnerName>Alderoty Stuart A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O HSBC BANK USA, N.A.</rptOwnerStreet1>
            <rptOwnerStreet2>452 FIFTH AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10018</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr Ex V.P. and General Counsel</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks>Effective October 7, 2016 no longer an officer of HSBC USA Inc.</remarks>

    <ownerSignature>
        <signatureName>/s/ Karen P. Pisarczyk, EVP and Secretary, HSBC USA Inc. and Attorney in Fact for Stuart Alderoty</signatureName>
        <signatureDate>2016-10-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
