    <SEC-DOCUMENT>0001193125-20-123020-index.html : 20200428
    <SEC-HEADER>0001193125-20-123020.hdr.sgml : 20200428
    <ACCEPTANCE-DATETIME>20200428160600
    ACCESSION NUMBER:		0001193125-20-123020
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		30
    CONFORMED PERIOD OF REPORT:	20200617
    FILED AS OF DATE:		20200428
    DATE AS OF CHANGE:		20200428
    EFFECTIVENESS DATE:		20200428

    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:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-26481
    		FILM NUMBER:		20824994

    	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>DEF 14A
    <SEQUENCE>1
    <FILENAME>d831730ddef14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: d831730ddef14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>g831730g00u46.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g831730g00u46.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g831730g00y18.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g831730g00y18.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g831730g04j05.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g831730g04j05.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g831730g10y83.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g831730g10y83.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g831730g12b79.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g831730g12b79.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g831730g12t65.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g831730g12t65.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g831730g13d07.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g831730g13d07.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g831730g16g38.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g831730g16g38.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>g831730g18z06.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g831730g18z06.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>g831730g20a45.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: g831730g20a45.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>g831730g21p99.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: g831730g21p99.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>g831730g24_35.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: g831730g24_35.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>g831730g28e39.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: g831730g28e39.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>g831730g34w58.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: g831730g34w58.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>g831730g40w62.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: g831730g40w62.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>g831730g43y15.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: g831730g43y15.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>g831730g47i26.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: g831730g47i26.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>g831730g48p23.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: g831730g48p23.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>g831730g51j66.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: g831730g51j66.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>g831730g57u32.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: g831730g57u32.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>g831730g64c66.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: g831730g64c66.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>g831730g70o45.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: g831730g70o45.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>g831730g71v30.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: g831730g71v30.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>g831730g72o43.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: g831730g72o43.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>g831730g75m70.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 26 - file: g831730g75m70.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>g831730g86h37.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 27 - file: g831730g86h37.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>g831730g86i69.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 28 - file: g831730g86i69.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>g831730g91q24.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 29 - file: g831730g91q24.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>g831730g96j45.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 30 - file: g831730g96j45.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>