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

    <schemaVersion>X0708</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001085921</cik>
        <entityName>MICROMEM TECHNOLOGIES INC</entityName>
        <issuerAddress>
            <street1>121 RICHMOND ST W</street1>
            <street2>SUITE 602</street2>
            <city>TORONTO</city>
            <stateOrCountry>A6</stateOrCountry>
            <stateOrCountryDescription>ONTARIO, CANADA</stateOrCountryDescription>
            <zipCode>M5H 2K1</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>416-364-6513</issuerPhoneNumber>
        <jurisdictionOfInc>ONTARIO, CANADA</jurisdictionOfInc>
        <issuerPreviousNameList>
            <previousName>Avanti Capital Corp.</previousName>
            <previousName>Mine Lake Minerals Inc.</previousName>
            <previousName>AvantiCorp International Inc.</previousName>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Joseph</firstName>
                <lastName>Fuda</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>121 Richmond St W</street1>
                <street2>Suite 602</street2>
                <city>Toronto</city>
                <stateOrCountry>A6</stateOrCountry>
                <stateOrCountryDescription>ONTARIO, CANADA</stateOrCountryDescription>
                <zipCode>M5H 2K1</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Alex</firstName>
                <lastName>Dey</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>121 Richmond St W</street1>
                <street2>Suite 602</street2>
                <city>Toronto</city>
                <stateOrCountry>A6</stateOrCountry>
                <stateOrCountryDescription>ONTARIO, CANADA</stateOrCountryDescription>
                <zipCode>M5H 2K1</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Oliver</firstName>
                <lastName>Nepomuceno</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>121 Richmond St W</street1>
                <street2>Suite 602</street2>
                <city>Toronto</city>
                <stateOrCountry>A6</stateOrCountry>
                <stateOrCountryDescription>ONTARIO, CANADA</stateOrCountryDescription>
                <zipCode>M5H 2K1</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Dan</firstName>
                <lastName>Amadori</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>121 Richmond St W</street1>
                <street2>Suite 602</street2>
                <city>Toronto</city>
                <stateOrCountry>A6</stateOrCountry>
                <stateOrCountryDescription>ONTARIO, CANADA</stateOrCountryDescription>
                <zipCode>M5H 2K1</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other Technology</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>No Revenues</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06b</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2026-06-18</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isOptionToAcquireType>true</isOptionToAcquireType>
            <isSecurityToBeAcquiredType>true</isSecurityToBeAcquiredType>
            <isOtherType>true</isOtherType>
            <descriptionOfOtherType>Units, each comprised of one common share and one common share purchase warrant with an exercise price of C$0.05 and a term of 2 years</descriptionOfOtherType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>53078</totalOfferingAmount>
            <totalAmountSold>17693</totalAmountSold>
            <totalRemaining>35385</totalRemaining>
            <clarificationOfResponse>Dollar amounts have been converted from Canadian dollars using the 0.7077 Bank of Canada daily exchange rate on 6-18-26. Total Remaining to be Sold is the aggregate exercise price of warrants sold in the United States.</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>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
            <clarificationOfResponse>A portion of the net proceeds may be used for general working capital purposes, including for payments to officers and directors in the ordinary course, but proceeds are not earmarked for such payments</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>MICROMEM TECHNOLOGIES INC</issuerName>
                <signatureName>/s/ Joseph Fuda</signatureName>
                <nameOfSigner>Joseph Fuda</nameOfSigner>
                <signatureTitle>President and Chief Executive Officer</signatureTitle>
                <signatureDate>2026-06-23</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
