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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 vlXFfkH/tXj/5g2GdXbM0Q==

<SEC-DOCUMENT>0000947871-09-000381.txt : 20090512
<SEC-HEADER>0000947871-09-000381.hdr.sgml : 20090512
<ACCEPTANCE-DATETIME>20090512154040
ACCESSION NUMBER:		0000947871-09-000381
CONFORMED SUBMISSION TYPE:	D
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20090512
DATE AS OF CHANGE:		20090512
EFFECTIVENESS DATE:		20090512

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Legend Natural Gas IV, LP
		CENTRAL INDEX KEY:			0001463156
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-130875
		FILM NUMBER:		09818637

	BUSINESS ADDRESS:	
		STREET 1:		410 W. GRAND PARKWAY SOUTH
		STREET 2:		SUITE 400
		CITY:			KATY
		STATE:			TX
		ZIP:			77494
		BUSINESS PHONE:		281-644-5900

	MAIL ADDRESS:	
		STREET 1:		410 W. GRAND PARKWAY SOUTH
		STREET 2:		SUITE 400
		CITY:			KATY
		STATE:			TX
		ZIP:			77494
</SEC-HEADER>
<DOCUMENT>
<TYPE>D
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0301</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001463156</cik>
        <entityName>Legend Natural Gas IV, LP</entityName>
        <issuerAddress>
            <street1>410 West Grand Parkway South</street1>
            <street2>Suite 400</street2>
            <city>Katy</city>
            <stateOrCountry>TX</stateOrCountry>
            <zipCode>77494</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>281-644-5900</issuerPhoneNumber>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <jurisdictionOfInc>DE</jurisdictionOfInc>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2009</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>A.</middleName>
                <lastName>Winne III</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>410 West Grand Parkway South</street1>
                <street2>Suite 400</street2>
                <city>Katy</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77494</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Member of the Board of Supervisors, which governs the partnership.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <middleName></middleName>
                <lastName>Becci</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>410 West Grand Parkway South</street1>
                <street2>Suite 400</street2>
                <city>Katy</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>77494</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Member of the Board of Supervisors, which governs the partnership.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>David</firstName>
                <middleName>M.</middleName>
                <lastName>Leuschen</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Riverstone Holdings LLC</street1>
                <street2>712 Fifth Avenue, 51st Floor</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Member of the Board of Supervisors, which governs the partnership.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Pierre</firstName>
                <middleName>F.</middleName>
                <lastName>Lapeyre, Jr.</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Riverstone Holdings LLC</street1>
                <street2>712 Fifth Avenue, 51st Floor</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Member of the Board of Supervisors, which governs the partnership.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Gregory</firstName>
                <middleName>A.</middleName>
                <lastName>Beard</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Riverstone Holdings LLC</street1>
                <street2>712 Fifth Avenue, 51st Floor</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Member of the Board of Supervisors, which governs the partnership.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas</firstName>
                <middleName></middleName>
                <lastName>Walker</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>LNG IV GP LLC, c/o Riverstone Holdings</street1>
                <street2>712 Fifth Avenue, 51st Floor</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10019</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Authorized Officer of LNG IV GP LLC, the General and/or Managing Partner of the Issuer</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Oil and Gas</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-04-29</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>Class A Partnership Interests
Class B Partnership Interests</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>400000000</totalOfferingAmount>
            <totalAmountSold>400000000</totalAmountSold>
            <totalRemaining>0</totalRemaining>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>8</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Legend Natural Gas IV, LP</issuerName>
                <signatureName>/s/ Michael Becci</signatureName>
                <nameOfSigner>Michael Becci</nameOfSigner>
                <signatureTitle>Vice President and Chief Financial Officer</signatureTitle>
                <signatureDate>2009-05-12</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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