<SEC-DOCUMENT>0001179110-16-030155.txt : 20161003
<SEC-HEADER>0001179110-16-030155.hdr.sgml : 20161003
<ACCEPTANCE-DATETIME>20161003144832
ACCESSION NUMBER:		0001179110-16-030155
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20160930
FILED AS OF DATE:		20161003
DATE AS OF CHANGE:		20161003

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ATLANTIC POWER CORP
		CENTRAL INDEX KEY:			0001419242
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC, GAS & SANITARY SERVICES [4900]
		IRS NUMBER:				550886410
		STATE OF INCORPORATION:			A1
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3 ALLIED DRIVE
		STREET 2:		SUITE 220
		CITY:			DEDHAM
		STATE:			MA
		ZIP:			02026
		BUSINESS PHONE:		617-977-2400

	MAIL ADDRESS:	
		STREET 1:		3 ALLIED DRIVE
		STREET 2:		SUITE 220
		CITY:			DEDHAM
		STATE:			MA
		ZIP:			02026

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DUNCAN R FOSTER
		CENTRAL INDEX KEY:			0001196663

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34691
		FILM NUMBER:		161915490

	MAIL ADDRESS:	
		STREET 1:		139 E FOURTH ST
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45202
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-09-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001419242</issuerCik>
        <issuerName>ATLANTIC POWER CORP</issuerName>
        <issuerTradingSymbol>AT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001196663</rptOwnerCik>
            <rptOwnerName>DUNCAN R FOSTER</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ATLANTIC POWER CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>3 ALLIED DRIVE, SUITE 220</rptOwnerStreet2>
            <rptOwnerCity>DEDHAM</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02026</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Deferred share units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2016-09-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>9630</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.53</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>9630</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>99325</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Deferred share units are granted under the Company's Deferred Share Unit Plan, which provides for the payment of all accrued deferred share units to the reporting person following his or her termination as a director. Each deferred share unit is equal to the economic equivalent of one common share.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>John S. Miele, attorney-in-fact</signatureName>
        <signatureDate>2016-10-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
