-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 CYcCRV9jhfithrFKrdI5kLzn7Pef703ctMneLmXbZySqOCaUSacXI0XxOjNMzEga
 93BM3DvQ+bdLJrg7S8eOHQ==

<SEC-DOCUMENT>0001192640-04-000012.txt : 20040526
<SEC-HEADER>0001192640-04-000012.hdr.sgml : 20040526
<ACCEPTANCE-DATETIME>20040526142315
ACCESSION NUMBER:		0001192640-04-000012
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040521
FILED AS OF DATE:		20040526

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MCMULLEN MARK J
		CENTRAL INDEX KEY:			0001192640

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31343
		FILM NUMBER:		04832068

	BUSINESS ADDRESS:	
		STREET 1:		1201 HANSEN RD
		CITY:			GREEN BAY
		STATE:			WI
		ZIP:			54304

	MAIL ADDRESS:	
		STREET 1:		409 PHEASANT RUN
		CITY:			KAUKAUNA
		STATE:			WI
		ZIP:			54130

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ASSOCIATED BANC-CORP
		CENTRAL INDEX KEY:			0000007789
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				391098068
		STATE OF INCORPORATION:			WI
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1200 HANSEN ROAD
		CITY:			GREEN BAY
		STATE:			WI
		ZIP:			54304
		BUSINESS PHONE:		9204917015

	MAIL ADDRESS:	
		STREET 1:		1200 HANSEN ROAD
		CITY:			GREEN BAY
		STATE:			WI
		ZIP:			54304

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ASSOCIATED BANK SERVICES INC
		DATE OF NAME CHANGE:	19770626
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgardoc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-05-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000007789</issuerCik>
        <issuerName>ASSOCIATED BANC-CORP</issuerName>
        <issuerTradingSymbol>ASBC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001192640</rptOwnerCik>
            <rptOwnerName>MCMULLEN MARK J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>525 W CHICKADEE LN</rptOwnerStreet1>
            <rptOwnerStreet2>-</rptOwnerStreet2>
            <rptOwnerCity>GREEN BAY</rptOwnerCity>
            <rptOwnerState>WI</rptOwnerState>
            <rptOwnerZipCode>54313</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive Vice President &amp;</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock $.01 Par Value</value>
            </securityTitle>
            <transactionDate>
                <value>2004-05-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>148.555</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>28.166</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>100543.356</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock $.01 Par Value</value>
            </securityTitle>
            <transactionDate>
                <value>2004-05-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>283.38</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15677.04</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>401(k) Plan</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Total includes adjustment in shares for exempt purchases in issuer's Dividend Reinvestment Plan since insider's last reporting.</footnote>
        <footnote id="F2">Based on an account valuation as of May 25, 2004, reflecting the settlement of inter-plan transfers into the stock fund which occurred on May 21, 2004.</footnote>
        <footnote id="F3">The closing price of Associated Banc-Corp stock on 5/21/04 was $28.24 per share.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Linda Van Camp  For: Mark J. McMullen</signatureName>
        <signatureDate>2004-05-26</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----