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

    <schemaVersion>X0708</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0002013392</cik>
        <entityName>USEDC Opportunity Zone III LP</entityName>
        <issuerAddress>
            <street1>1521 N. COOPER ST.</street1>
            <street2>STE 400</street2>
            <city>ARLINGTON</city>
            <stateOrCountry>TX</stateOrCountry>
            <stateOrCountryDescription>TEXAS</stateOrCountryDescription>
            <zipCode>76011</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>682-305-2868</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2023</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>U.S. Energy</firstName>
                <lastName>Development Corporation</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1521 N. Cooper St.</street1>
                <street2>Ste 400</street2>
                <city>Arlington</city>
                <stateOrCountry>TX</stateOrCountry>
                <stateOrCountryDescription>TEXAS</stateOrCountryDescription>
                <zipCode>76011</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Managing General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Jordan</firstName>
                <lastName>Jayson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1521 N. Cooper St.</street1>
                <street2>Ste 400</street2>
                <city>Arlington</city>
                <stateOrCountry>TX</stateOrCountry>
                <stateOrCountryDescription>TEXAS</stateOrCountryDescription>
                <zipCode>76011</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Officer and Director of Managing General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Matthew</firstName>
                <lastName>Iak</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1521 N. Cooper St.</street1>
                <street2>Ste 400</street2>
                <city>Arlington</city>
                <stateOrCountry>TX</stateOrCountry>
                <stateOrCountryDescription>TEXAS</stateOrCountryDescription>
                <zipCode>76011</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Officer and Director of Managing General Partner</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Oil and Gas</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>No Revenues</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06c</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0002013392-24-000001</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2024-11-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>Limited Partnership Interest</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>100000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Delmar Buck</recipientName>
                <recipientCRDNumber>7299100</recipientCRDNumber>
                <associatedBDName>VISTIA CAPITAL, LLC</associatedBDName>
                <associatedBDCRDNumber>311342</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>202 6th Street</street1>
                    <street2>Suite 303</street2>
                    <city>Castle Rock</city>
                    <stateOrCountry>CO</stateOrCountry>
                    <stateOrCountryDescription>COLORADO</stateOrCountryDescription>
                    <zipCode>80104</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>AL</state>
                    <description>ALABAMA</description>
                </statesOfSolicitationList>
                <foreignSolicitation>false</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>150000000</totalOfferingAmount>
            <totalAmountSold>100000</totalAmountSold>
            <totalRemaining>149900000</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>0</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>8250000</dollarAmount>
                <isEstimate>true</isEstimate>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse>Sales Commission - up to 5.5%; Dealer-Manager Fee - 1.5%; Due Diligence Fee - 0.5%; Marketing Fee - 0.5%; Payment to Managing General Partner - 0.3%.</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>USEDC Opportunity Zone III LP</issuerName>
                <signatureName>/s/ Matthew P. Iak</signatureName>
                <nameOfSigner>Matthew Iak</nameOfSigner>
                <signatureTitle>Executive Vice President of Managing Partner</signatureTitle>
                <signatureDate>2024-11-12</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
