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    <periodOfReport>2015-12-31</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000069488</issuerCik>
        <issuerName>MYERS INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>MYE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001219577</rptOwnerCik>
            <rptOwnerName>ORR JOHN C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1293 SOUTH MAIN STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>AKRON</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>44301</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Former Officer and Director</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Spousal Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
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    <derivativeTable>
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                <underlyingSecurityTitle>
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                <value></value>
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    <footnotes>
        <footnote id="F1">On March 1, 2013, the Company granted 46,300 Restricted Stock Units, with one-third of the Restricted Stock Units to vest on each of March 1, 2014, 2015, and 2016. Mr. Orr retired effective December 31, 2015, causing the accelation of the vesting and the payment for the Restricted Stock Units in the form of Common Stock of the remaining 15,433 Restricted Stock Units.</footnote>
        <footnote id="F2">Represents a disposition of shares to the Company. Such disposition is exempt under Section 16(b) under Rule 16b-3(e).</footnote>
        <footnote id="F3">On March 7, 2014, the Company granted 33,700 Restricted Stock Units, with one-third of the Restricted Stock Units to vest on each of March 7, 2015, 2016, and 2017. Mr. Orr retired effective December 31, 2015, causing the accelation of the vesting, and the payment for the Restricted Stock Units in the form of Common Stock, of 11,234 of the Restricted Stock Units. The remaining 11,233 Restricted Stock Units vested, however payment in the form of Common Stock for those shares will be delayed for six months pursuant to the operation of Internal Revenue Code Section 409A.</footnote>
        <footnote id="F4">Of the 22,467 Restricted Stock Units from the March 7, 2014 grant that vested, payment in the form of Common Stock for 11,233 of those Restricted Stock Units will be delayed for six months pursuant to the operation of Internal Revenue Code Section 409A.</footnote>
        <footnote id="F5">On March 5, 2015, the Company granted 32,200 Restricted Stock Units, with one-third of the Restricted Stock Units to vest on each of March 5, 2016, 2017, and 2018. Mr. Orr retired effective December 31, 2015, causing the accelation of the vesting, and the payment for the Restricted Stock Units in the form of Common Stock, of 10,733 of the Restricted Stock Units. The remaining 21,467 Restricted Stock Units vested, however payment in the form of Common Stock for those Restricted Stock Units will be delayed for six months pursuant to the operation of Internal Revenue Code Section 409A.</footnote>
        <footnote id="F6">Of the 32,200 Restricted Stock Units from the March 5, 2015 grant that vested, payment in the form of Common Stock for 21,467 of those Restricted Stock Units will be delayed for six (6) months pursuant to the operation of Internal Revenue Code Section 409A.</footnote>
        <footnote id="F7">A Restricted Stock Unit is the grant of the right to receive an amount equal to the fair market value of a share on the date that payment is made with respect to the Restricted Stock Unit. Subject to the instances of acceleration detailed above, the Restricted Stock Units vest in three equal installments on each of the first three anniversaries of the date of the grant.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Megan L. Mehalko pursuant to POA dated 10/25/06 and filed 4/25/08</signatureName>
        <signatureDate>2016-01-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
