<SEC-DOCUMENT>0001127602-19-033810.txt : 20191127
<SEC-HEADER>0001127602-19-033810.hdr.sgml : 20191127
<ACCEPTANCE-DATETIME>20191127151538
ACCESSION NUMBER:		0001127602-19-033810
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20191120
FILED AS OF DATE:		20191127
DATE AS OF CHANGE:		20191127

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MacPherson Kerrie D.
		CENTRAL INDEX KEY:			0001794595

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13695
		FILM NUMBER:		191257212

	MAIL ADDRESS:	
		STREET 1:		5790 WIDEWATERS PARKWAY
		STREET 2:		C/O COMMUNITY BANK SYSTEM INC.
		CITY:			DEWITT
		STATE:			NY
		ZIP:			13214

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COMMUNITY BANK SYSTEM, INC.
		CENTRAL INDEX KEY:			0000723188
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				161213679
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5790 WIDEWATERS PKWY
		CITY:			DEWITT
		STATE:			NY
		ZIP:			13214
		BUSINESS PHONE:		8007242262

	MAIL ADDRESS:	
		STREET 1:		5790 WIDEWATERS PARKWAY
		CITY:			DEWITT
		STATE:			NY
		ZIP:			13214

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COMMUNITY BANK NA, a subsidiary of Community Bank System Inc
		DATE OF NAME CHANGE:	20130729

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COMMUNITY BANK NA, a subsidiary of Community Bank System Inc.
		DATE OF NAME CHANGE:	20130726

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COMMUNITY BANK SYSTEM INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>form3.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2019-11-20</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000723188</issuerCik>
        <issuerName>COMMUNITY BANK SYSTEM, INC.</issuerName>
        <issuerTradingSymbol>CBU</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001794595</rptOwnerCik>
            <rptOwnerName>MacPherson Kerrie D.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5790 WIDEWATERS PARKWAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DEWITT</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>13214</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </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>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ Marguerite K. Geiss, pursuant to a Confirming Statement executed by Kerrie D. MacPherson</signatureName>
        <signatureDate>2019-11-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>doc1.txt
<DESCRIPTION>POWER OF ATTORNEY (PUBLIC): CONFIRMING STATEMENT
<TEXT>
Confirming Statement

This Confirming Statement (?Statement?) confirms that the undersigned,
Kerrie D. MacPherson, has authorized, directed and designated each of
Danielle M. Cima, George J. Getman and Marguerite K. Geiss (each a
?Designee? and together, the ?Designees?), or either of them acting
singly, to: (1) prepare, execute and file for and on behalf of the
undersigned with the U.S. Securities and Exchange Commission (the ?SEC?)
a Form ID, including amendments thereto, enabling the undersigned to
make electronic filings with the SEC of reports required by Section
16(a) of the Securities Exchange Act of 1934 and any rule or regulation
thereunder; and (2) prepare, execute and file for and on behalf of the
undersigned with the SEC and any stock exchange or similar authority,
all Forms 3, 4, and 5, including any amendments thereto, that the
undersigned is required to file as an officer and/or director of
Community Bank System, Inc. (the ?Company?) in accordance with
Section 16(a) of the Securities Exchange Act of 1934 and any rule or
regulation thereunder.

The authority of the Designees under this Statement shall continue until the
undersigned is no longer required to file Forms 3, 4, and 5 with
respect to the undersigned?s holdings of and/or transactions in securities of
the Company, unless earlier revoked by the undersigned in a signed writing
delivered to the Designees.  The undersigned acknowledges that the
Designees are not assuming, nor is the Company assuming, any of the
undersigned?s responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.  This Statement is not intended to be a power of
attorney as defined in the New York General Obligations Law, Article
5, Title 15, Section 5-1501, and in the event this Statement is determined to
be a power of attorney under such statute, this Statement shall not revoke
any power of attorney previously executed by the undersigned and shall not
be revoked by any subsequent power of attorney unless such subsequent
power of attorney expressly provides that it revokes this Statement by
referring to the date and subject hereof.


Date: November 15, 2019

    /s/   Kerrie D. MacPherson
Name:  Kerrie D. MacPherson







</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
