<SEC-DOCUMENT>0001193125-21-313381-index.html : 20211029
<SEC-HEADER>0001193125-21-313381.hdr.sgml : 20211029
<ACCEPTANCE-DATETIME>20211029161754
ACCESSION NUMBER:		0001193125-21-313381
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20211029
DATE AS OF CHANGE:		20211029
EFFECTIVENESS DATE:		20211029

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:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-260592
		FILM NUMBER:		211363453

	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>S-8
<SEQUENCE>1
<FILENAME>d238427ds8.htm
<DESCRIPTION>S-8
<TEXT>
Document 1 - file: d238427ds8.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>d238427dex51.htm
<DESCRIPTION>EX-5.1
<TEXT>
Document 2 - file: d238427dex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>d238427dex231.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 3 - file: d238427dex231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g238427dsp007.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g238427dsp007.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g238427dsp008.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g238427dsp008.jpg

</DOCUMENT>
</SEC-DOCUMENT>