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

    <schemaVersion>X0708</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001894821</cik>
        <entityName>Landmark Real Estate Partners IX Offshore, L.P.</entityName>
        <issuerAddress>
            <street1>10 MILL POND LANE</street1>
            <city>SIMSBURY</city>
            <stateOrCountry>CT</stateOrCountry>
            <stateOrCountryDescription>CONNECTICUT</stateOrCountryDescription>
            <zipCode>06070</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>860-651-9760</issuerPhoneNumber>
        <jurisdictionOfInc>CAYMAN ISLANDS</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2021</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Matthew</firstName>
                <lastName>Jill</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Ares Management LLC</street1>
                <street2>245 Park Avenue, 44th Floor</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10167</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Francisco</firstName>
                <middleName>L.</middleName>
                <lastName>Borges</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Landmark Partners</street1>
                <street2>10 Mill Pond Lane</street2>
                <city>Simsbury</city>
                <stateOrCountry>CT</stateOrCountry>
                <stateOrCountryDescription>CONNECTICUT</stateOrCountryDescription>
                <zipCode>06070</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michelle</firstName>
                <lastName>Creed</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Landmark Partners</street1>
                <street2>10 Mill Pond Lane</street2>
                <city>Simsbury</city>
                <stateOrCountry>CT</stateOrCountry>
                <stateOrCountryDescription>CONNECTICUT</stateOrCountryDescription>
                <zipCode>06070</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Timothy</firstName>
                <middleName>L.</middleName>
                <lastName>Haviland</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Landmark Partners</street1>
                <street2>10 Mill Pond Lane</street2>
                <city>Simsbury</city>
                <stateOrCountry>CT</stateOrCountry>
                <stateOrCountryDescription>CONNECTICUT</stateOrCountryDescription>
                <zipCode>06070</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Chad</firstName>
                <middleName>S.</middleName>
                <lastName>Alfeld</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Landmark Partners</street1>
                <street2>10 Mill Pond Lane</street2>
                <city>Simsbury</city>
                <stateOrCountry>CT</stateOrCountry>
                <stateOrCountryDescription>CONNECTICUT</stateOrCountryDescription>
                <zipCode>06070</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Paul</firstName>
                <middleName>R.</middleName>
                <lastName>Mehlman</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Landmark Partners</street1>
                <street2>10 Mill Pond Lane</street2>
                <city>Simsbury</city>
                <stateOrCountry>CT</stateOrCountry>
                <stateOrCountryDescription>CONNECTICUT</stateOrCountryDescription>
                <zipCode>06070</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Tina</firstName>
                <lastName>St. Pierre</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Landmark Partners</street1>
                <street2>10 Mill Pond Lane</street2>
                <city>Simsbury</city>
                <stateOrCountry>CT</stateOrCountry>
                <stateOrCountryDescription>CONNECTICUT</stateOrCountryDescription>
                <zipCode>06070</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>J.</middleName>
                <lastName>Sunday</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Landmark Partners</street1>
                <street2>215 Franklin Street, 18th Floor</street2>
                <city>Boston</city>
                <stateOrCountry>MA</stateOrCountry>
                <stateOrCountryDescription>MASSACHUSETTS</stateOrCountryDescription>
                <zipCode>02110</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Private Equity Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06b</item>
            <item>3C</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <yetToOccur>true</yetToOccur>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Ares Investor Services LLC</recipientName>
                <recipientCRDNumber>166219</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>800 Corporate Pointe Drive 3rd Fl</street1>
                    <city>Culver City</city>
                    <stateOrCountry>CA</stateOrCountry>
                    <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                    <zipCode>90230</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>DE</state>
                    <description>DELAWARE</description>
                    <state>HI</state>
                    <description>HAWAII</description>
                    <state>TX</state>
                    <description>TEXAS</description>
                    <state>MA</state>
                    <description>MASSACHUSETTS</description>
                    <state>MD</state>
                    <description>MARYLAND</description>
                    <state>IA</state>
                    <description>IOWA</description>
                    <state>ME</state>
                    <description>MAINE</description>
                    <state>ID</state>
                    <description>IDAHO</description>
                    <state>MI</state>
                    <description>MICHIGAN</description>
                    <state>UT</state>
                    <description>UTAH</description>
                    <state>MN</state>
                    <description>MINNESOTA</description>
                    <state>MO</state>
                    <description>MISSOURI</description>
                    <state>IL</state>
                    <description>ILLINOIS</description>
                    <state>IN</state>
                    <description>INDIANA</description>
                    <state>MS</state>
                    <description>MISSISSIPPI</description>
                    <state>MT</state>
                    <description>MONTANA</description>
                    <state>AK</state>
                    <description>ALASKA</description>
                    <state>AL</state>
                    <description>ALABAMA</description>
                    <state>VA</state>
                    <description>VIRGINIA</description>
                    <state>AR</state>
                    <description>ARKANSAS</description>
                    <state>NC</state>
                    <description>NORTH CAROLINA</description>
                    <state>ND</state>
                    <description>NORTH DAKOTA</description>
                    <state>NE</state>
                    <description>NEBRASKA</description>
                    <state>RI</state>
                    <description>RHODE ISLAND</description>
                    <state>AZ</state>
                    <description>ARIZONA</description>
                    <state>NH</state>
                    <description>NEW HAMPSHIRE</description>
                    <state>NJ</state>
                    <description>NEW JERSEY</description>
                    <state>VT</state>
                    <description>VERMONT</description>
                    <state>NM</state>
                    <description>NEW MEXICO</description>
                    <state>FL</state>
                    <description>FLORIDA</description>
                    <state>NV</state>
                    <description>NEVADA</description>
                    <state>WA</state>
                    <description>WASHINGTON</description>
                    <state>NY</state>
                    <description>NEW YORK</description>
                    <state>SC</state>
                    <description>SOUTH CAROLINA</description>
                    <state>SD</state>
                    <description>SOUTH DAKOTA</description>
                    <state>WI</state>
                    <description>WISCONSIN</description>
                    <state>OH</state>
                    <description>OHIO</description>
                    <state>GA</state>
                    <description>GEORGIA</description>
                    <state>OK</state>
                    <description>OKLAHOMA</description>
                    <state>CA</state>
                    <description>CALIFORNIA</description>
                    <state>WV</state>
                    <description>WEST VIRGINIA</description>
                    <state>WY</state>
                    <description>WYOMING</description>
                    <state>OR</state>
                    <description>OREGON</description>
                    <state>KS</state>
                    <description>KANSAS</description>
                    <state>CO</state>
                    <description>COLORADO</description>
                    <state>KY</state>
                    <description>KENTUCKY</description>
                    <state>CT</state>
                    <description>CONNECTICUT</description>
                    <state>PA</state>
                    <description>PENNSYLVANIA</description>
                    <state>LA</state>
                    <description>LOUISIANA</description>
                    <state>TN</state>
                    <description>TENNESSEE</description>
                    <state>DC</state>
                    <description>DISTRICT OF COLUMBIA</description>
                </statesOfSolicitationList>
                <foreignSolicitation>false</foreignSolicitation>
            </recipient>
            <recipient>
                <recipientName>Larrain Vial, Investment Inc.</recipientName>
                <recipientCRDNumber>None</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>El Bosque Norte 0177, Piso 3</street1>
                    <city>Las Condes, Santiago</city>
                    <stateOrCountry>F3</stateOrCountry>
                    <stateOrCountryDescription>CHILE</stateOrCountryDescription>
                    <zipCode>7550100</zipCode>
                </recipientAddress>
                <statesOfSolicitationList></statesOfSolicitationList>
                <foreignSolicitation>true</foreignSolicitation>
            </recipient>
            <recipient>
                <recipientName>Monument Group (HK) Ltd.</recipientName>
                <recipientCRDNumber>None</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>8 Connaught Place</street1>
                    <street2>Suite 3003</street2>
                    <city>Central, Hong Kong</city>
                    <stateOrCountry>K3</stateOrCountry>
                    <stateOrCountryDescription>HONG KONG</stateOrCountryDescription>
                    <zipCode>00000</zipCode>
                </recipientAddress>
                <statesOfSolicitationList></statesOfSolicitationList>
                <foreignSolicitation>true</foreignSolicitation>
            </recipient>
            <recipient>
                <recipientName>Mirae Asset Daewoo Co., Ltd.</recipientName>
                <recipientCRDNumber>None</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>Center One Bldg, Eljiro 5-gil</street1>
                    <street2>Jong-gu</street2>
                    <city>Seoul</city>
                    <stateOrCountry>M5</stateOrCountry>
                    <stateOrCountryDescription>KOREA, REPUBLIC OF</stateOrCountryDescription>
                    <zipCode>04539</zipCode>
                </recipientAddress>
                <statesOfSolicitationList></statesOfSolicitationList>
                <foreignSolicitation>true</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>0</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>0</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </findersFees>
            <clarificationOfResponse>Placement agent fees to be paid based upon a fee schedule. Such fees may be offset against the management fees payable by the Issuer.</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
            <clarificationOfResponse>The general partner is entitled to carried interest. An affiliate of the general partner will receive a management fee for management services. The carried interest and management fee are disclosed in the Issuer's confidential offering materials.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Landmark Real Estate Partners IX Offshore, L.P.</issuerName>
                <signatureName>Matthew Jill</signatureName>
                <nameOfSigner>Matthew Jill</nameOfSigner>
                <signatureTitle>Authorized Signatory</signatureTitle>
                <signatureDate>2021-12-16</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
