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

    <schemaVersion>X0708</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0000763532</cik>
        <entityName>LSI INDUSTRIES INC</entityName>
        <issuerAddress>
            <street1>10000 ALLIANCE RD</street1>
            <city>CINCINNATI</city>
            <stateOrCountry>OH</stateOrCountry>
            <stateOrCountryDescription>OHIO</stateOrCountryDescription>
            <zipCode>45242</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>513-793-3200</issuerPhoneNumber>
        <jurisdictionOfInc>OHIO</jurisdictionOfInc>
        <edgarPreviousNameList>
            <previousName>LSI LIGHTING SYSTEMS INC</previousName>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>A.</middleName>
                <lastName>Clark</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10000 ALLIANCE RD</street1>
                <city>CINCINNATI</city>
                <stateOrCountry>OH</stateOrCountry>
                <stateOrCountryDescription>OHIO</stateOrCountryDescription>
                <zipCode>45242</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas</firstName>
                <middleName>A.</middleName>
                <lastName>Caneris</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10000 ALLIANCE RD</street1>
                <city>CINCINNATI</city>
                <stateOrCountry>OH</stateOrCountry>
                <stateOrCountryDescription>OHIO</stateOrCountryDescription>
                <zipCode>45242</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>E.</middleName>
                <lastName>Galeese</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10000 ALLIANCE RD</street1>
                <city>CINCINNATI</city>
                <stateOrCountry>OH</stateOrCountry>
                <stateOrCountryDescription>OHIO</stateOrCountryDescription>
                <zipCode>45242</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Wilfred</firstName>
                <middleName>T.</middleName>
                <lastName>O'Gara</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10000 ALLIANCE RD</street1>
                <city>CINCINNATI</city>
                <stateOrCountry>OH</stateOrCountry>
                <stateOrCountryDescription>OHIO</stateOrCountryDescription>
                <zipCode>45242</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Amy</firstName>
                <middleName>L.</middleName>
                <lastName>Hanson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10000 ALLIANCE RD</street1>
                <city>CINCINNATI</city>
                <stateOrCountry>OH</stateOrCountry>
                <stateOrCountryDescription>OHIO</stateOrCountryDescription>
                <zipCode>45242</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Chantel</firstName>
                <middleName>E.</middleName>
                <lastName>Lenard</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10000 ALLIANCE RD</street1>
                <city>CINCINNATI</city>
                <stateOrCountry>OH</stateOrCountry>
                <stateOrCountryDescription>OHIO</stateOrCountryDescription>
                <zipCode>45242</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <middleName>P.</middleName>
                <lastName>Beech</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10000 ALLIANCE RD</street1>
                <city>CINCINNATI</city>
                <stateOrCountry>OH</stateOrCountry>
                <stateOrCountryDescription>OHIO</stateOrCountryDescription>
                <zipCode>45242</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ronald</firstName>
                <middleName>D.</middleName>
                <lastName>Brown</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10000 ALLIANCE RD</street1>
                <city>CINCINNATI</city>
                <stateOrCountry>OH</stateOrCountry>
                <stateOrCountryDescription>OHIO</stateOrCountryDescription>
                <zipCode>45242</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ernest</firstName>
                <middleName>W.</middleName>
                <lastName>Marshall, Jr.</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>10000 ALLIANCE RD</street1>
                <city>CINCINNATI</city>
                <stateOrCountry>OH</stateOrCountry>
                <stateOrCountryDescription>OHIO</stateOrCountryDescription>
                <zipCode>45242</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Manufacturing</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Not Applicable</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06b</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2026-03-24</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>true</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>5000000</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>5000000</totalOfferingAmount>
            <totalAmountSold>5000000</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>1</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>LSI INDUSTRIES INC</issuerName>
                <signatureName>/s/ Thomas A. Caneris</signatureName>
                <nameOfSigner>Thomas A. Caneris</nameOfSigner>
                <signatureTitle>Executive Vice President</signatureTitle>
                <signatureDate>2026-03-25</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
