<SEC-DOCUMENT>0001567619-20-021512.txt : 20201222
<SEC-HEADER>0001567619-20-021512.hdr.sgml : 20201222
<ACCEPTANCE-DATETIME>20201222181839
ACCESSION NUMBER:		0001567619-20-021512
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20201217
FILED AS OF DATE:		20201222
DATE AS OF CHANGE:		20201222

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Zukonik Debra
		CENTRAL INDEX KEY:			0001837442

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-51331
		FILM NUMBER:		201409289

	MAIL ADDRESS:	
		STREET 1:		60 NORTH FRONTAGE ROAD
		CITY:			BURR RIDGE
		STATE:			IL
		ZIP:			60527

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BankFinancial CORP
		CENTRAL INDEX KEY:			0001303942
		STANDARD INDUSTRIAL CLASSIFICATION:	SAVINGS INSTITUTION, FEDERALLY CHARTERED [6035]
		IRS NUMBER:				000000000
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		15W060 NORTH FRONTAGE ROAD
		CITY:			BURR RIDGE
		STATE:			IL
		ZIP:			60527
		BUSINESS PHONE:		(800) 894-6900

	MAIL ADDRESS:	
		STREET 1:		15W060 NORTH FRONTAGE ROAD
		CITY:			BURR RIDGE
		STATE:			IL
		ZIP:			60527
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2020-12-17</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001303942</issuerCik>
        <issuerName>BankFinancial CORP</issuerName>
        <issuerTradingSymbol>BFIN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001837442</rptOwnerCik>
            <rptOwnerName>Zukonik Debra</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>60 NORTH FRONTAGE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BURR RIDGE</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60527</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ Edward A. Quint, pursuant to power of attorney</signatureName>
        <signatureDate>2020-12-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poa.htm
<TEXT>
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  <head>
    <title></title>
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         Copyright 1995 - 2020 Broadridge -->
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    <div style="text-align: center; font-family: 'Times New Roman',Times,serif; font-size: 1px; font-weight: bold;">POWER OF ATTORNEY</div>
    <div style="font-size: 12pt;"><br>
    </div>
    <div style="font-size: 12pt;"><br>
    </div>
    <div style="text-indent: 36pt; font-family: 'Times New Roman',Times,serif; font-size: 12pt;">I hereby appoint Edward A. Quint, Jeffrey Cass, F. Morgan Gasior, Patricia Smith Lawler or Elizabeth Doolan act as my true and
      lawful&#160; attorney-in-fact with authority to execute on my behalf any Form ID, 3, 4 or 5 or any amendment thereto required to be filed by the undersigned under Section 16 of the Securities Exchange Act of 1934, as amended, and the rules and regulations
      promulgated thereunder, with the appropriate regulatory authorities and to do all things incident and necessary to that end, until such time as I notify Messrs. Quint, Cass or Gasior or Mses. Smith Lawler or Doolan in writing that his or her
      authority to act on my behalf in this manner has been withdrawn.</div>
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    <div style="text-align: justify; text-indent: 36pt; font-family: 'Times New Roman',Times,serif; font-size: 12pt;">I have signed this power of attorney on <u>December 18</u>,
      2020.</div>
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          <td style="width: 180pt; vertical-align: top; font-family: 'Times New Roman',Times,serif; font-size: 12pt;">By</td>
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            <div style="font-family: 'Times New Roman',Times,serif;"><u>/s/ Debra Zukonik</u></div>
          </td>
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    <div style="text-align: justify; text-indent: 27pt; margin-left: 225pt; font-family: 'Times New Roman',Times,serif; font-size: 12pt;">Debra Zukonik</div>
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          <td style="width: 180pt; vertical-align: top; font-family: 'Times New Roman',Times,serif; font-size: 12pt;">In presence of</td>
          <td style="width: auto; vertical-align: top; text-align: justify; font-size: 12pt;">
            <div style="font-family: 'Times New Roman',Times,serif;"><u>/s/ Heather Murry</u></div>
          </td>
        </tr>

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    <div style="text-align: justify; text-indent: 216pt;"><font style="font-size: 12pt; font-family: 'Times New Roman',Times,serif;">at&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; </font><font style="font-size: 12pt; font-family: 'Times New Roman',Times,serif;"><u>Rockwall, Texas</u><font style="display: inline-block; text-indent: 0px; width: 12pt;" id="TRGRRTFtoHTMLTab">&#160;</font></font></div>
    <div style="text-align: justify; text-indent: 72pt; margin-left: 180pt;"><font style="font-size: 12pt; font-family: 'Times New Roman',Times,serif;">&#160;City</font><font style="font-size: 12pt;">&#160;&#160;&#160;&#160;&#160;&#160;&#160; <font style="font-family: 'Times New Roman',Times,serif;">State</font></font></div>
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</SEC-DOCUMENT>
