<SEC-DOCUMENT>0001144204-17-006017-index.html : 20170206
<SEC-HEADER>0001144204-17-006017.hdr.sgml : 20170206
<ACCEPTANCE-DATETIME>20170203191117
ACCESSION NUMBER:		0001144204-17-006017
CONFORMED SUBMISSION TYPE:	S-3ASR
PUBLIC DOCUMENT COUNT:		8
FILED AS OF DATE:		20170206
DATE AS OF CHANGE:		20170203
EFFECTIVENESS DATE:		20170206

FILER:

	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

	FILING VALUES:
		FORM TYPE:		S-3ASR
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-215894
		FILM NUMBER:		17573674

	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>S-3ASR
<SEQUENCE>1
<FILENAME>v458190_s-3asr.htm
<DESCRIPTION>S-3ASR
<TEXT>
Document 1 - file: v458190_s-3asr.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>v458190_ex5-1.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 2 - file: v458190_ex5-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>3
<FILENAME>v458190_ex10-1.htm
<DESCRIPTION>EXHIBIT 10.1
<TEXT>
Document 3 - file: v458190_ex10-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>4
<FILENAME>v458190_ex23-1.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 4 - file: v458190_ex23-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>pg1img1_ex5-1.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: pg1img1_ex5-1.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>pg1img1_s-3asr.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: pg1img1_s-3asr.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>pg3img1_s-3asr.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: pg3img1_s-3asr.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>pg16img1_s-3asr.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: pg16img1_s-3asr.jpg

</DOCUMENT>
</SEC-DOCUMENT>