POWER OF ATTORNEY

	I, MARTIN K. BIRMINGHAM, residing at 14 Northstone Rise, Pittsford, New York
14534 do hereby appoint KARL F. KREBS, residing at 9130 Beach Meadow Court,
Clarence Center, New York 14032; SONIA M. DUMBLETON, residing at 3922 Miller
Road, Warsaw, New York 14569 and MICHAEL D. GROVER, residing at 254 Linwood
Avenue, Warsaw, New York 14569 as my AGENTS, with the ability to act SEPARATELY,
and hereby REVOKE any and all prior Powers of Attorney executed by me with
regard to the following Grant of Authority.
	I hereby grant to my Agents, as my lawful attorneys in fact, the following
authority:
	1.  prepare, execute in the undersigned's name and on the undersigned's behalf,
and submit to the U.S. Securities and Exchange Commission (the "SEC") a Form ID,
including amendments thereto, and any other documents necessary or appropriate
to obtain codes and passwords enabling the undersigned to make electronic
filings with the SEC of reports required by Section 16(a) of the Securities
Exchange Act of 1934 or any rule or regulation of the SEC;
	2.  execute for and on behalf of the undersigned, in the undersigned's capacity
as an officer and/or director of Financial Institutions, Inc. (the "Company"),
Forms 3, 4, and 5 in accordance with Section (16a) of the Securities Exchange
Act of 1934 and the rules thereunder, and any other forms or reports the
undersigned may be required to file in connection with the undersigned's
ownership, acquisition, or disposition of securities of the Company;
	3.  do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such Form 3, 4, or 5,
or other form or 	report, and timely file such form or report with the United
States Securities and Exchange Commission and any stock exchange or similar
authority; and
	4.  take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact may approve in such
attorney-in-fact's discretion.
		The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted.  The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934.
		This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms, 3, 4, and 5 with respect to the
undersigned's holdings of and transaction in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.
In Witness Whereof I have hereunto signed my name on OCTOBER ___26____, 2009.

						/s/ Martin K. Birmingham
						MARTIN K. BIRMINGHAM
STATE OF NEW YORK	)
				  ss.:
COUNTY OF WYOMING	)

	On the ___26____ day of OCTOBER, in the year 2009, before me, the undersigned,
a Notary Public in and for said state, personally appeared ROBERT N. LATELLA,
personally known to me or proved to me on the basis of satisfactory evidence to
be the person whose name is subscribed to the within instrument and acknowledged
to me that he executed the same in his capacity, and that by his signature on
the instrument, the person or the entity upon behalf of which the person acted,
executed the instrument.
						    /s/ Sheryl L. Montgomery
							NOTARY PUBLIC

WE, KARL F. KREBS, SONIA M. DUMBLETON and MICHAEL D. GROVER have read the
foregoing Power of Attorney.  We are the persons identified as agents for the
principal named therein.  We acknowledge our legal responsibilities.

/s/ Karl F. Krebs           /s/ Sonia M. Dumbleton  /s/ Michael D. Grover
KARL F. KREBS		     SONIA M. DUMBLETON	    MICHAEL D. GROVER

STATE OF NEW YORK	)
				  ss.:
COUNTY OF WYOMING	)

	On the ___23____ day of OCTOBER, in the year 2009, before me, the undersigned,
a Notary Public in and for said state, personally appeared KARL F. KREBS,
personally known to me or proved to me on the basis of satisfactory evidence to
be the person whose name is subscribed to the within instrument and acknowledged
to me that he executed the same in his capacity, and that by his signature on
the instrument, the person or the entity upon behalf of which the person acted,
executed the instrument.
						    /s/ Sheryl L. Montgomery
							NOTARY PUBLIC

STATE OF NEW YORK	)
				  ss.:
COUNTY OF WYOMING	)

	On the __23_____ day of OCTOBER, in the year 2009, before me, the undersigned,
a Notary Public in and for said state, personally appeared SONIA M. DUMBLETON,
personally known to me or proved to me on the basis of satisfactory evidence to
be the person whose name is subscribed to the within instrument and acknowledged
to me that she executed the same in her capacity, and that by her signature on
the instrument, the person or the entity upon behalf of which the person acted,
executed the instrument.
						    /s/ Sheryl L. Montgomery
							NOTARY PUBLIC

STATE OF NEW YORK	)
				  ss.:
COUNTY OF WYOMING	)

	On the ___23____ day of OCTOBER, in the year 2009, before me, the undersigned,
a Notary Public in and for said state, personally appeared MICHAEL D. GROVER,
personally known to me or proved to me on the basis of satisfactory evidence to
be the person whose name is subscribed to the within instrument and acknowledged
to me that he executed the same in his capacity, and that by his signature on
the instrument, the person or the entity upon behalf of which the person acted,
executed the instrument.
						    /s/ Sheryl L. Montgomery
							NOTARY PUBLIC