FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * TRYNISKI MARK E   2. Issuer Name and Ticker or Trading Symbol COMMUNITY BANK SYSTEM INC [CBU] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President & CEO (Last) (First) (Middle) 1964 PENFOLD WAY 3. Date of Earliest Transaction (Month/Day/Year) 01/20/2010 (Street) BALDWINSVILLE, NY 13027 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 01/20/2010   A   4,928 A $ 0 37,325 D   Common Stock               6,474 (1) I By 401(k) Plan

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Option

$ 19.48

01/20/2010

A

17,360

(2)

01/20/2020

Common Stock

17,360

$ 0

17,360

D

Stock Option

$ 17.82

01/20/2010

A

41,949

01/20/2010

04/22/2019

Common Stock

41,949

$ 0

41,949 (3)

D

Stock Option

$ 22.94

01/20/2010

D

5,000

01/17/2010

01/17/2017

Common Stock

5,000

$ 0

28,333 (4)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
TRYNISKI MARK E 1964 PENFOLD WAY BALDWINSVILLE, NY 13027	X		President & CEO

Signatures

Donna J. Drengel, as attorney-in-fact, pursuant to a power of attorney for Mark E. Tryniski		01/22/2010
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The number of shares reported herein were acquired pursuant to Community Bank System, Inc.'s 401(K) Plan and are based on a current plan statement.
(2)	The options vest in five equal installments on January 20, 2011, 2012, 2013, 2014 and 2015.
(3)	On April 22, 2009, the reporting person was granted an option to purchase 41,949 shares of common stock at the fair market value on the date of grant subject to the achievement of predetermined performance criteria. The option vested on January 20, 2010 upon the determination that the performance criteria was satisfied.
(4)	Represents the cancellation of 5,000 shares of the January 2007 performance option based on the determination that the performance criteria was not fully satisfied. The reporting person did not receive any consideration in connection with the cancellation.

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