<SEC-DOCUMENT>0001564590-18-027501-index.html : 20181106
<SEC-HEADER>0001564590-18-027501.hdr.sgml : 20181106
<ACCEPTANCE-DATETIME>20181106170034
ACCESSION NUMBER:		0001564590-18-027501
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20181106
ITEM INFORMATION:		Regulation FD Disclosure
FILED AS OF DATE:		20181106
DATE AS OF CHANGE:		20181106

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:		181163808

	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>fisi-8k_20181106.htm
<DESCRIPTION>8-K (NOV 2018 INVESTOR PRESENTATION)
<TEXT>
Document 1 - file: fisi-8k_20181106.htm

</DOCUMENT>
</SEC-DOCUMENT>