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

    <schemaVersion>X0203</schemaVersion>

    <documentType>3/A</documentType>

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

    <dateOfOriginalSubmission>2009-01-05</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001096788</issuerCik>
        <issuerName>KNOLOGY INC</issuerName>
        <issuerTradingSymbol>KNOL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001451926</rptOwnerCik>
            <rptOwnerName>Farallon FCP, Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FARALLON CAPITAL MANAGEMENT, L.L.C.</rptOwnerStreet1>
            <rptOwnerStreet2>ONE MARITIME PLAZA, SUITE 2100</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Member of Group Owning 10%</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001451925</rptOwnerCik>
            <rptOwnerName>Farallon FCIP, Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FARALLON CAPITAL MANGEMENT, L.L.C.</rptOwnerStreet1>
            <rptOwnerStreet2>ONE MARITIME PLAZA, SUITE 2100</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Member of Group Owning 10%</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001452356</rptOwnerCik>
            <rptOwnerName>Farallon FCOI II, Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FARALLON CAPITAL MANAGEMENT, L.L.C.</rptOwnerStreet1>
            <rptOwnerStreet2>ONE MARITIME PLAZA, SUITE 2100</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Member of Group Owning 10%</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001453077</rptOwnerCik>
            <rptOwnerName>Hirsch Daniel J.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FARALLON CAPITAL MANAGEMENT, L.L.C.</rptOwnerStreet1>
            <rptOwnerStreet2>ONE MARITIME PLAZA, SUITE 2100</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Member of Group Owning 10%</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001453076</rptOwnerCik>
            <rptOwnerName>Voon Richard H.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FARALLON CAPITAL MANAGEMENT, L.L.C.</rptOwnerStreet1>
            <rptOwnerStreet2>ONE MARITIME PLAZA, SUITE 2100</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94111</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Member of Group Owning 10%</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>207590</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F6"/>
                    <footnoteId id="F11"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>170754</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F3"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F6"/>
                    <footnoteId id="F11"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>281214</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F4"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F6"/>
                    <footnoteId id="F11"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4310817</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F7"/>
                    <footnoteId id="F8"/>
                    <footnoteId id="F10"/>
                    <footnoteId id="F11"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, par value $0.01 per share</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4310817</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F7"/>
                    <footnoteId id="F9"/>
                    <footnoteId id="F10"/>
                    <footnoteId id="F11"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The entities and individuals identified in the footnotes of this Form 3 and certain affiliated entities and individuals that are filing two Form 4s on the same date as the filing of this Form 3 with respect to the securities described in this Form 3 (the &quot;Farallon Form 4s&quot;) may be deemed members of a group holding equity securities of the Issuer. The filing of this Form 3 and any statements included herein shall not be deemed to be an admission that such entities and individuals are members of such group.</footnote>
        <footnote id="F2">The amount of securities shown in this row is owned directly by Farallon FCP, Ltd. (the &quot;FCP Trust&quot;).</footnote>
        <footnote id="F3">The amount of securities shown in this row is owned directly by Farallon FCIP, Ltd. (the &quot;FCIP Trust&quot;).</footnote>
        <footnote id="F4">The amount of securities shown in this row is owned directly by Farallon FCOI II, Ltd. (the &quot;FCOI II Trust&quot; and, together with the FCP Trust and the FCIP Trust, the &quot;Farallon Trusts&quot;).</footnote>
        <footnote id="F5">For information regarding the total number of securities of the Issuer beneficially owned by certain affiliated entities and individuals of the Farallon Trusts, see footnotes (7) through (9) of this Form 3 and the Farallon Form 4s.</footnote>
        <footnote id="F6">Farallon Partners, L.L.C. (&quot;FPLLC&quot;), one of the reporting persons in the Farallon Form 4s, is a trustee of each of the Farallon Trusts. FPLLC has no direct or indirect pecuniary interest in the securities held by the Farallon Trusts.</footnote>
        <footnote id="F7">The amount of securities shown in this row is owned directly by Farallon Capital Partners, L.P., Farallon Capital Institutional Partners, L.P., Farallon Capital Institutional Partners II, L.P., Farallon Capital Institutional Partners III, L.P., Tinicum Partners, L.P. and Farallon Capital Offshore Investors II, L.P. (collectively, the &quot;Partnerships&quot;) and by certain discretionary accounts (the &quot;Managed Accounts&quot;) managed by Farallon Capital Management, L.L.C. (&quot;FCMLLC&quot;). As the general partner to each of the Partnerships, FPLLC may be deemed to be the beneficial owner of the Issuer's securities held by each of the Partnerships. FCMLLC, as the registered investment advisor to the Managed Accounts, may be deemed to be the beneficial owner of the Issuer's securities held by the Managed Accounts. The Partnerships, FPLLC and FCMLLC are reporting persons in the Farallon Form 4s.</footnote>
        <footnote id="F8">Effective as of January 1, 2009, Daniel J. Hirsch (&quot;Hirsch&quot;) became a managing member of FPLLC and FCMLLC, and, as a result, may be deemed to be the beneficial owner of the Issuer's securities held by the Partnerships and the Managed Accounts.</footnote>
        <footnote id="F9">Effective as of January 1, 2009, Richard H. Voon (&quot;Voon&quot;) became a managing member of FPLLC and FCMLLC, and, as a result, may be deemed to be the beneficial owner of the Issuer's securities held by the Partnerships and the Managed Accounts.</footnote>
        <footnote id="F10">Hirsch, Voon and certain other related entities and/or individuals identified in this Form 3 and the Farallon Form 4s disclaim any beneficial ownership of any of the Issuer's securities reported or referred to herein for the purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the &quot;'34 Act&quot;), or otherwise, except to the extent of their pecuniary interest, if any. FPLLC disclaims any beneficial ownership of any of the Issuer's securities reported or referred to herein for the purposes of Section 16 of the '34 Act or otherwise, except as to securities representing FPLLC's pro rata interest in, and interest in the profits of, the Partnerships.</footnote>
        <footnote id="F11">This Form 3 amends and restates in its entirety the Form 3 filed by the reporting persons on January 5, 2009.  This Form 3 is being filed solely to incorporate the power of attorney executed by Hirsch and Voon which is attached herewith as Exhibit 24.1.</footnote>
    </footnotes>

    <remarks>Exhibit List: Exhibit 24.1: Power of Attorney - Daniel J. Hirsch; Exhibit 24.1: Power of Attorney - Richard H. Voon</remarks>

    <ownerSignature>
        <signatureName>/s/ Monica R. Landry as attorney-in-fact and/or authorized signer for each of the reporting persons listed in footnotes (2) through (4) and footnotes (8) and (9).</signatureName>
        <signatureDate>2009-01-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>.</signatureName>
        <signatureDate>2009-01-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>.</signatureName>
        <signatureDate>2009-01-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>.</signatureName>
        <signatureDate>2009-01-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>.</signatureName>
        <signatureDate>2009-01-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
