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

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0000855931</cik>
        <entityName>POTASH CORP OF SASKATCHEWAN INC</entityName>
        <issuerAddress>
            <street1>Suite 500, 122 - 1st Avenue South</street1>
            <city>Saskatoon</city>
            <stateOrCountry>A9</stateOrCountry>
            <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
            <zipCode>S7K 7G3</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>306-933-8500</issuerPhoneNumber>
        <jurisdictionOfInc>CANADA (FEDERAL LEVEL)</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>J.</middleName>
                <lastName>Doyle</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Wayne</firstName>
                <middleName>R.</middleName>
                <lastName>Brownlee</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
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            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>G.</firstName>
                <middleName>David</middleName>
                <lastName>Delaney</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <middleName>A.</middleName>
                <lastName>Jaspar</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
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                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
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            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Joseph</firstName>
                <middleName>A.</middleName>
                <lastName>Podwika</lastName>
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                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Stephen</firstName>
                <middleName>F.</middleName>
                <lastName>Dowdle</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
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            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Garth</firstName>
                <middleName>W.</middleName>
                <lastName>Moore</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Daphne</firstName>
                <middleName>J.</middleName>
                <lastName>Arnason</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Lee</firstName>
                <middleName>M.</middleName>
                <lastName>Knafelc</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
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                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
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            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
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            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Denis</firstName>
                <middleName>A.</middleName>
                <lastName>Sirois</lastName>
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                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Denita</firstName>
                <middleName>C.</middleName>
                <lastName>Stann</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Brent</firstName>
                <lastName>Heimann</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Darryl</firstName>
                <lastName>Stann</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mark</firstName>
                <lastName>Fracchia</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
                <stateOrCountry>A9</stateOrCountry>
                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
                <zipCode>S7K 7G3</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Christopher</firstName>
                <middleName>M.</middleName>
                <lastName>Burley</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
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                <zipCode>S7K 7G3</zipCode>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Keith</firstName>
                <middleName>G.</middleName>
                <lastName>Martell</lastName>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
                <city>Saskatoon</city>
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                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
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            <relatedPersonAddress>
                <street1>Suite 500, 122 - 1st Avenue South</street1>
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                <stateOrCountryDescription>SASKATCHEWAN, CANADA</stateOrCountryDescription>
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                <zipCode>S7K 7G3</zipCode>
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            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
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                <firstName>C.</firstName>
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                <lastName>Hoffman</lastName>
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                <firstName>Dallas</firstName>
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                <lastName>Howe</lastName>
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        <relatedPersonInfo>
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                <firstName>E.</firstName>
                <middleName>Robert</middleName>
                <lastName>Stromberg</lastName>
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                <street1>Suite 500, 122 - 1st Avenue South</street1>
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            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Alice</firstName>
                <middleName>D.</middleName>
                <lastName>Laberge</lastName>
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            <relationshipClarification></relationshipClarification>
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        <relatedPersonInfo>
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                <firstName>Elena</firstName>
                <lastName>Viyella de Paliza</lastName>
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                <zipCode>S7K 7G3</zipCode>
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    <offeringData>
        <industryGroup>
            <industryGroupType>Agriculture</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Over $100,000,000</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2011-04-04</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isDebtType>true</isDebtType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>250000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Merrill Lynch, Pierce, Fenner &amp; Smith Incorporated</recipientName>
                <recipientCRDNumber>7691</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>One Bryant Park</street1>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                    <zipCode>10036</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>CA</state>
                    <description>CALIFORNIA</description>
                    <state>CT</state>
                    <description>CONNECTICUT</description>
                    <state>NY</state>
                    <description>NEW YORK</description>
                    <state>UT</state>
                    <description>UTAH</description>
                </statesOfSolicitationList>
            </recipient>
            <recipient>
                <recipientName>Morgan Stanley &amp; Co. Incorporated</recipientName>
                <recipientCRDNumber>8209</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>1585 Broadway, 4th Floor</street1>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                    <zipCode>10036</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>CA</state>
                    <description>CALIFORNIA</description>
                    <state>CT</state>
                    <description>CONNECTICUT</description>
                    <state>DE</state>
                    <description>DELAWARE</description>
                    <state>NJ</state>
                    <description>NEW JERSEY</description>
                </statesOfSolicitationList>
            </recipient>
            <recipient>
                <recipientName>RBC Capital Markets, LLC</recipientName>
                <recipientCRDNumber>31194</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>Three World Financial Center</street1>
                    <street2>200 Vesey Street, 8th Floor</street2>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                    <zipCode>10281</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>CT</state>
                    <description>CONNECTICUT</description>
                    <state>DE</state>
                    <description>DELAWARE</description>
                </statesOfSolicitationList>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>1500000000</totalOfferingAmount>
            <totalAmountSold>190000000</totalAmountSold>
            <totalRemaining>1310000000</totalRemaining>
            <clarificationOfResponse>This is a continuous commercial paper program offering with the maximum amount of short-term notes to be outstanding at any given time of $1,500,000,000.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>10</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>6447</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>POTASH CORP OF SASKATCHEWAN INC</issuerName>
                <signatureName>/s/ Joseph Podwika</signatureName>
                <nameOfSigner>Joseph Podwika</nameOfSigner>
                <signatureTitle>Senior Vice President, General Counsel and Secretary</signatureTitle>
                <signatureDate>2011-05-26</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
