<SUBMISSION>
<ACCESSION-NUMBER>0001567619-19-013079
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20190605
<FILING-DATE>20190607
<DATE-OF-FILING-DATE-CHANGE>20190607
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Carrasco Carlos Alfredo
<CIK>0001733844
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-32217
<FILM-NUMBER>19887093
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>48 NW
<STREET2>25TH ST.
<CITY>MIAMI
<STATE>FL
<ZIP>33127
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>Cool Holdings, Inc.
<CIK>0001274032
<ASSIGNED-SIC>5065
<IRS-NUMBER>330599368
<STATE-OF-INCORPORATION>MD
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>2001 NW 84TH AVENUE
<CITY>MIAMI
<STATE>FL
<ZIP>33122
<PHONE>8583731675
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>2001 NW 84TH AVENUE
<CITY>MIAMI
<STATE>FL
<ZIP>33122
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>InfoSonics Corp
<DATE-CHANGED>20170925
</FORMER-COMPANY>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>INFOSONICS Corp
<DATE-CHANGED>20130401
</FORMER-COMPANY>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>INFOSONICS CORP
<DATE-CHANGED>20031219
</FORMER-COMPANY>
</ISSUER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-06-05</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001274032</issuerCik>
        <issuerName>Cool Holdings, Inc.</issuerName>
        <issuerTradingSymbol>AWSM</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001733844</rptOwnerCik>
            <rptOwnerName>Carrasco Carlos Alfredo</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O COOL HOLDINGS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>2001 NW 84TH AVENUE</rptOwnerStreet2>
            <rptOwnerCity>MIAMI</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33122</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Former Chief Financial Officer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>102194</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Pursuant to the terms of the separation agreement between the reporting individual and the Issuer, the vesting schedule for the 40,000 restricted stock grants previously reported on a Form 4 filed with the Securities and Exchange Commission on May 15, 2019, has been accelerated.  The remaining, unvested restricted stock grants shall vest at 100% eight (8) calendar days following mutual acceptance of the separation agreement.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Vernon A. LoForti, as attorney-in-fact for Carlos Alfredo Carrasco</signatureName>
        <signatureDate>2019-06-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
