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

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001475053</cik>
        <entityName>Semper Fidelis Oil &amp; Gas, LLC</entityName>
        <issuerAddress>
            <street1>6850 TPC DRIVE</street1>
            <street2>SUITE 114</street2>
            <city>MCKINNEY</city>
            <stateOrCountry>TX</stateOrCountry>
            <zipCode>75070</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>972 665-5059</issuerPhoneNumber>
        <jurisdictionOfInc>TEXAS</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Liability Company</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2008</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Nicholas</firstName>
                <lastName>Yukich</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>6850 T.P.C. Drive, Suite 114</street1>
                <city>McKinney</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>75070</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Walter</firstName>
                <lastName>Crabb</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>6850 T.P.C. Drive, Suite 114</street1>
                <city>McKinney</city>
                <stateOrCountry>TX</stateOrCountry>
                <zipCode>75070</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director of Production &amp; Field Operations</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Oil and Gas</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>$1,000,001 - $5,000,000</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2010-03-11</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>Working interests in the McSpadden Multiple Offset Driling/Re-Completion Program</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>18750</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Titus Financial, Inc.</recipientName>
                <recipientCRDNumber>None</recipientCRDNumber>
                <associatedBDName>Titus Financial, Inc.</associatedBDName>
                <associatedBDCRDNumber>27271</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>6850 T.P.C. Drive, Suite 114</street1>
                    <city>McKinney</city>
                    <stateOrCountry>TX</stateOrCountry>
                    <zipCode>75070</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>AL</state>
                    <state>AZ</state>
                    <state>AR</state>
                    <state>CA</state>
                    <state>CO</state>
                    <state>CT</state>
                    <state>FL</state>
                    <state>GA</state>
                    <state>ID</state>
                    <state>IA</state>
                    <state>MD</state>
                    <state>MA</state>
                    <state>MI</state>
                    <state>MN</state>
                    <state>MS</state>
                    <state>MT</state>
                    <state>NE</state>
                    <state>NV</state>
                    <state>NJ</state>
                    <state>NY</state>
                    <state>NC</state>
                    <state>OH</state>
                    <state>OK</state>
                    <state>OR</state>
                    <state>PA</state>
                    <state>SC</state>
                    <state>SD</state>
                    <state>TX</state>
                    <state>UT</state>
                    <state>VA</state>
                    <state>WA</state>
                    <state>WI</state>
                </statesOfSolicitationList>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>1068750</totalOfferingAmount>
            <totalAmountSold>187500</totalAmountSold>
            <totalRemaining>881250</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>3</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>128250</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>204558</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>General &amp; administrative expenses, Well Management Fee and Organization &amp; Offering expenses (minus 12% commissions &amp; Due diligence).</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Semper Fidelis Oil &amp; Gas, LLC</issuerName>
                <signatureName>Nicholas Yukich II</signatureName>
                <nameOfSigner>Nicholas Yukich III</nameOfSigner>
                <signatureTitle>President</signatureTitle>
                <signatureDate>2010-03-19</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
