<SEC-DOCUMENT>0001193125-17-186473-index.html : 20170530
<SEC-HEADER>0001193125-17-186473.hdr.sgml : 20170529
<ACCEPTANCE-DATETIME>20170530093004
ACCESSION NUMBER:		0001193125-17-186473
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		7
CONFORMED PERIOD OF REPORT:	20170530
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20170530
DATE AS OF CHANGE:		20170530

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FINANCIAL INSTITUTIONS INC
		CENTRAL INDEX KEY:			0000862831
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				160816610
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26481
		FILM NUMBER:		17875755

	BUSINESS ADDRESS:	
		STREET 1:		220 LIBERTY STREET
		CITY:			WARSAW
		STATE:			NY
		ZIP:			14569
		BUSINESS PHONE:		5857861100

	MAIL ADDRESS:	
		STREET 1:		220 LIBERTY STREET
		CITY:			WARSAW
		STATE:			NY
		ZIP:			14569
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>d403941d8k.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: d403941d8k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>d403941dex51.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 2 - file: d403941dex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>3
<FILENAME>d403941dex101.htm
<DESCRIPTION>EX-10.1
<TEXT>
Document 3 - file: d403941dex101.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>4
<FILENAME>d403941dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 4 - file: d403941dex991.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g403941g0527071318399.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g403941g0527071318399.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g403941g0528021929109.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g403941g0528021929109.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g403941img001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g403941img001.jpg

</DOCUMENT>
</SEC-DOCUMENT>