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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2016-03-09</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001287808</issuerCik>
        <issuerName>Hill International, Inc.</issuerName>
        <issuerTradingSymbol>HIL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001440820</rptOwnerCik>
            <rptOwnerName>Schauerman John</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CRESCENDO PARTNERS II, L.P.</rptOwnerStreet1>
            <rptOwnerStreet2>777 THIRD AVENUE, 37TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>See Explanation of Responses</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15183</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person is a member of a Section13(d) group that owns in the aggregate more than 10% of the Issuer's outstanding shares of Common Stock as disclosed in a Schedule 13D, filed on behalf of the Reporting Person and certain other stockholders of the Issuer on March 10, 2016. As such, the Reporting Person may be deemed to beneficially own more than 10% of the Issuer's outstanding shares of Common Stock. The Reporting Person disclaims beneficial ownership of the shares of Common Stock except to the extent of his pecuniary interest therein, and this report shall not be deemed to be an admission that the Reporting Person is the beneficial owner of such shares of Common Stock for purposes of Section 16 or for any other purpose.</footnote>
    </footnotes>

    <remarks>Exhibit 24- Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>By: John P. Schauerman; By: /s/ Eric Rosenfeld, Attorney-in-Fact</signatureName>
        <signatureDate>2016-03-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
