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

    <schemaVersion>X0203</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2009-01-01</periodOfReport>

    <dateOfOriginalSubmission>2009-01-09</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000008328</issuerCik>
        <issuerName>ATLAS MINING CO</issuerName>
        <issuerTradingSymbol>ALMI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001453391</rptOwnerCik>
            <rptOwnerName>Zeitoun Andre</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>110 GREENE STREET, SUITE 1101</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10012</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>35500</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held in IRA of Spouse Jodi Zeitoun</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option Right to Purchase</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>.70</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2019-01-01</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>6583277</value>
                    <footnoteId id="F2"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Material Advisors LLC</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">500 shares were omitted from the reporting person's original Form 3 due to a clerical error by Atlas's Corporate counsel. The correct number of shares owned by reporting person's spouse's IRA is 35,500 shares as reported above.</footnote>
        <footnote id="F2">The original Form 3 reported an excessive number of shares subject to the option due to an error in calculation of Company's outstanding shares which was identified and corrected by reporting person following his appointment as an officer of the Company. The correct number of shares subject to the option is 6,583,277 as reported above.  The Stock Option vests in 36 installments, the first two on February 23, 2009 and the remaining 34 on a monthly basis thereafter. Except for the amendments in this amended Form 3 the original Form 3 of reporting person remains in effect.</footnote>
        <footnote id="F3">The Stock Option is owned by Material Advisors LLC in which reporting person is a manager and member.  This and the orignal filing will not be deemed an admission that reporting person is a beneficial owner of the Stock Option or the Common Stock into which the option is convertible and because voting and investment decisions of Material Advisors require and are made by three or more individuals the ownership of the Stock Option and all of the Common Stock into which the Stock Option is convertible is expressly disclaimed.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Andre Zeitoun</signatureName>
        <signatureDate>2009-04-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
