United States
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 11-K

(Mark One)

      |X|   ANNUAL REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE
            ACT OF 1934

                 For the fiscal year ended December 31, 2006 or

      |_|   TRANSACTION REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES AND
            EXCHANGE ACT OF 1934

                 For the transaction period from _____ to _____

                        Commission File Number 001-13695

A.    Full title of the plan and the address of the plan, if different from that
      of the issuer named below:

                           Community Bank System, Inc.
                      401(k) Employee Stock Ownership Plan
                             5790 Widewaters Parkway
                             DeWitt, New York 13214

B.    Name of Issuer of the securities held pursuant to the plan and the address
      of its principal executive office.

                           Community Bank System, Inc.
                             5790 Widewaters Parkway
                             DeWitt, New York 13214



                              REQUIRED INFORMATION

1.    Not applicable

2.    Not applicable

3.    Not applicable

4.    The Community Bank System, Inc. 401(k) Employee Stock Ownership Plan (the
      "Plan") is subject to the requirements of the Employee Retirement Income
      Security Act of 1974 ("ERISA"). Attached hereto as Appendix I is a copy of
      the most recent financial statements of the Plan prepared in accordance
      with the financial reporting requirements of ERISA.

Exhibits

(23)  Consent of Dannible & McKee, LLP.



                                   Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the trustee
(or other  persons who  administer  the employee  benefit plan) have duly caused
this annual report to be signed on its behalf by the undersigned,  hereunto duly
authorized.

                                        Community Bank System, Inc.
                                        401(k) Employee Stock Ownership Plan

                                        Community Bank, N. A., Trustee

Dated: June 28, 2007
                                        /s/ Scott Kingsley
                                        -----------------------------
                                        Scott Kingsley
                                        Executive Vice President and Chief
                                        Financial Officer



                                   Appendix I

                           COMMUNITY BANK SYSTEM, INC.
                      401(K) EMPLOYEE STOCK OWNERSHIP PLAN
                              FINANCIAL STATEMENTS
                                       AND
                              SUPPLEMENTAL SCHEDULE
                                      * * *
                           DECEMBER 31, 2006 AND 2005



Community Bank System, Inc.
401(k) Employee Stock Ownership Plan
Index
December 31, 2006 and 2005
--------------------------------------------------------------------------------



                                                                                     Page(s)
                                                                                      
Report of Independent Registered Public Accounting Firm .............................      1

Financial Statements:

   Statements of Net Assets Available for Benefits ..................................      2

   Statements of Changes in Net Assets Available for Benefits, ......................      3

   Notes to Financial Statements ....................................................    4-8

Supplemental Schedule:

   Schedule of Assets (Held at End of Year) (Schedule H, Part IV, Item (i)) .........      9


Note:  All other schedules are omitted since they are not applicable or are not
       required based on the disclosure requirements of the Employee Retirement
       Income Security Act of 1974 and applicable regulations issued by the
       Department of Labor.



             Report of Independent Registered Public Accounting Firm

                                                                   June 26, 2007

To the Participants and Administrators of Community Bank
 System, Inc. 401(k) Employee Stock Ownership Plan

      We have audited the  accompanying  statements of net assets  available for
benefits of Community Bank System,  Inc.  401(k)  Employee Stock  Ownership Plan
("the  Plan") as of December  31, 2006 and 2005 and the  related  statements  of
changes in net assets  available  for benefits  for the years then ended.  These
financial  statements  are the  responsibility  of the  Plan's  management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

      We conducted  our audits in  accordance  with the  standards of the Public
Company Accounting Oversight Board (United States). Those standards require that
we plan and perform the audit to obtain  reasonable  assurance about whether the
financial statements are free of material misstatement. The Plan is not required
to have, nor were we engaged to perform,  an audit of its internal  control over
financial reporting.  Our audits included consideration of internal control over
financial  reporting  as  a  basis  for  designing  audit  procedures  that  are
appropriate  in the  circumstances,  but not for the  purpose of  expressing  an
opinion on the  effectiveness  of the Plan's  internal  control  over  financial
reporting. Accordingly, we express no such opinion. An audit includes examining,
on a  test  basis,  evidence  supporting  the  amounts  and  disclosures  in the
financial statements. An audit also includes assessing the accounting principles
used and  significant  estimates made by  management,  as well as evaluating the
overall financial statement  presentation.  We believe that our audits provide a
reasonable basis for our opinion.

      In our opinion, the financial statements referred to above present fairly,
in all material  respects,  the net assets available for benefits of the Plan as
of December  31,  2006 and 2005,  and the  changes in net assets  available  for
benefits  for the  years  then  ended  in  conformity  with  generally  accepted
accounting principles (United States).

      Our audits  were  performed  for the  purpose of forming an opinion on the
basic financial statements taken as a whole. The supplemental Schedule of Assets
Held  for  Investment  Purposes  at End of  Year as of  December  31,  2006,  is
presented for the purpose of  additional  analysis and is not a required part of
the basic financial statements, but is supplementary information required by the
Department of Labor's Rules and Regulations  for Reporting and Disclosure  under
the Employee Retirement Income Security Act of 1974. This supplemental  schedule
is the  responsibility of the Plan's management.  The supplemental  schedule has
been  subjected  to the  auditing  procedures  applied in the audit of the basic
financial  statements  and, in our  opinion,  is fairly  stated in all  material
respects in relation to the basic financial statements taken as a whole.

                                                       /s/ Dannible & McKee, LLP

                                                           Dannible & McKee, LLP
                                                              Syracuse, New York



Community Bank System, Inc.
401(k) Employee Stock Ownership Plan
Statements of Net Assets Available for Benefits
December 31, 2006 and 2005
--------------------------------------------------------------------------------



                                                                     2006           2005
                                                                     ----           ----
                                                                          
Assets
Investments, at fair value (Notes B and C):
   Mutual funds                                                  $ 29,648,801   $ 25,795,311
   Community Bank System, Inc. common stock                        17,216,217     16,199,821
   Collective trust fund                                           14,222,419     12,065,124
   Participant loans                                                1,927,513      1,751,673
   Self-directed brokerage                                            620,068        294,358
   Money market fund                                                  360,048        288,273
                                                                 ------------   ------------
        Total investments                                          63,995,066     56,394,560

Contributions receivable - employer                                   672,285        761,438
                                                                 ------------   ------------

        Net assets available for benefits at fair value            64,667,351     57,155,998

        Adjustment from fair value to contract value for fully
         benefit-responsive investments                               374,339         30,768

                                                                 ------------   ------------
        Net assets available for benefits                        $ 65,041,690   $ 57,186,766
                                                                 ============   ============


    The accompanying notes are an integral part of the financial statements.


                                       2


Community Bank System, Inc.
401(k) Employee Stock Ownership Plan
Statements of Changes in Net Assets Available for Benefits
Years Ended December 31, 2006 and 2005
--------------------------------------------------------------------------------



                                                                               2006           2005
                                                                               ----           ----
                                                                                    
Additions
Employee contributions                                                     $  3,735,218   $  3,849,739
Employer contributions                                                        1,726,158      1,777,691
Interest income                                                                 154,210         87,924
Dividend income                                                               2,718,538      2,060,356
Net appreciation (depreciation) in the fair value of investments              2,298,048     (3,813,500)
Transfer from merged plan (Note F)                                            5,172,272             --
                                                                           ------------   ------------
   Total additions                                                           15,804,444      3,962,210
                                                                           ------------   ------------

Deductions
Benefit payments                                                              7,860,236      5,035,353
Administrative fees                                                              89,284         72,718
                                                                           ------------   ------------
   Total deductions                                                           7,949,520      5,108,071
                                                                           ------------   ------------

      Net increase (decrease) in net assets available for benefits            7,854,924     (1,145,861)

                                     Net assets available for benefits
Beginning of Year                                                            57,186,766     58,332,627
                                                                           ------------   ------------

End of Year                                                                $ 65,041,690   $ 57,186,766
                                                                           ============   ============


    The accompanying notes are an integral part of the financial statements.


                                       3


Community Bank System, Inc.
401(k) Employee Stock Ownership Plan
Notes to Financial Statements
December 31, 2006 and 2005
--------------------------------------------------------------------------------

A.    Description of the Plan

      The  following  description  of the  Community  Bank System,  Inc.  401(k)
      Employee  Stock   Ownership  Plan  (the  "Plan")   provides  only  general
      information.  Participants  should refer to the Plan  agreement for a more
      complete description of the Plan's provisions.

      General

      The  Plan  is a  defined  contribution  plan  covering  substantially  all
      employees of Community Bank System, Inc. (the "Company") who are age 18 or
      older.  Employees  must have one year of  service to be  eligible  for the
      Company's  contribution.  The Plan also  qualifies  as an  employee  stock
      ownership  plan under the meaning of Section  4975(e)(7)  of the  Internal
      Revenue  Code.  The Plan is subject to the  provisions  of the  Employment
      Retirement Income Security Act of 1974 (ERISA).

      Contributions

      Participants may make voluntary  contributions of up to 90% of their total
      compensation on a pre-tax or after-tax basis up to a maximum  contribution
      of $15,000 for 2006.  Voluntary  cash  contributions  of up to 6% of total
      eligible  compensation  are  matched 50% by the Company and such match was
      $1,043,113  and $1,016,253 in 2006 and 2005,  respectively.  The amount of
      the  Company's  annual   discretionary   profit  sharing  contribution  is
      determined by the Board of Directors,  within certain maximum limitations.
      These discretionary profit sharing contributions to the Plan are allocated
      to individual  participant  accounts.  Such  discretionary  profit sharing
      contributions were $683,045 and $761,438 in 2006 and 2005, respectively.

      Participant Accounts

      Each participant's account is credited with the participant's contribution
      and allocations of the Company's contribution as well as Plan earnings and
      charged with an allocation of administrative expenses.  Allocation of Plan
      earnings and administrative  expenses are based on participant earnings or
      account  balances,  as  defined.  The  benefit to which a  participant  is
      entitled is the benefit that can be provided from the participant's vested
      account. Forfeited accounts are allocated annually to eligible participant
      accounts based on the ratio of each eligible participant's compensation to
      total eligible participant  compensation.  Forfeited accounts allocated to
      eligible  participants  amounted  to $2,896 and $27,626 for 2006 and 2005,
      respectively.

      Vesting

      Participants  are  immediately  vested  in  their  contributions  and  the
      Company's  discretionary  profit  sharing  contributions.  Vesting  in the
      Company's  matching  contribution  portion plus actual earnings thereon is
      based on years of continuous  service. A participant is 100 percent vested
      after three years of service.

      Participant Loans

      Participants  may borrow from the Plan a minimum of $1,000 up to a maximum
      equal to the  lesser of $50,000  or 50  percent  of their  vested  account
      balance.  Loans are  collateralized  by the  balance in the  participant's
      account.


                                       4


Community Bank System, Inc.
401(k) Employee Stock Ownership Plan
Notes to Financial Statements
December 31, 2006 and 2005
--------------------------------------------------------------------------------

      Payment of Benefits

      Normal retirement date for participants under the Plan is the later of age
      65 or the  completion of 5 years of service.  Upon  termination of service
      due to death,  disability  or  retirement,  the  participant  will receive
      either a lump sum amount or installment payments equal to the value of the
      participant's  vested interest in his or her account.  If some or all of a
      participant's  account  balance is allocated to the employee  stock option
      feature of the Plan,  that  portion of the Plan benefit may be paid in the
      form of Company stock.  Upon  termination  of  employment,  if the account
      balance is less than $5,000,  the  participant  will receive a single lump
      sum  amount  equal to the  value  of his or her  account,  otherwise,  the
      participant may elect to defer payment up to age 65. Hardship  withdrawals
      of up to 100% of employee  contributions are available if Internal Revenue
      Service guidelines are met.

      Plan Termination

      Although  it has not  expressed  any intent to do so, the  Company has the
      right  under  the  Plan  to  discontinue  contributions  at any  time  and
      terminate the Plan subject to the  provisions  set forth in ERISA.  In the
      event the Plan terminates,  the net assets of the Plan are to be set aside
      for   participating   employees  based  upon  balances  then  credited  to
      individual  accounts.  Participants  shall be vested 100% in the assets so
      allocated to their accounts.

B.    Significant Accounting Policies

      Basis of Accounting

      The accompanying  financial statements are prepared on an accrual basis of
      accounting in accordance with accounting  principles generally accepted in
      the United States of America.

      Valuation of Investments

      Investments are stated at aggregate fair value,  except for the SEI Stable
      Asset GIC Fund,  which is stated at contract  value.  Securities  that are
      traded on a national  securities  exchange are valued at the last reported
      sales price on the last  business  day of the Plan year.  Shares of mutual
      funds  are  valued at the net  asset  value of shares  held by the Plan at
      year-end. Participant loan receivable balances are reported at cost, which
      approximates fair value.

      The Plan  presents  in the  Statement  of  Changes  in Net  Assets the net
      appreciation  (depreciation)  in the fair value of its investments,  which
      consists of realized  gains or losses as well as  unrealized  appreciation
      (depreciation) on those investments.

      Purchases and sales of securities are recorded on the trade date. Gains or
      losses on sales of securities are based on average cost.  Interest  income
      is  recorded  on  the  accrual  basis.   Dividends  are  recorded  on  the
      ex-dividend date.

      The SEI  Stable  Asset  GIC  Fund is  stated  according  to the  Financial
      Accounting  Standards Board Staff Position,  FSP AAG INV-1 and SOP 94-4-1,
      Reporting of Fully Benefit-Responsive Investment Contracts Held by Certain
      Investment  Companies  Subject to the AICPA  Investment  Company Guide and
      Defined-Contribution  Health and Welfare and Pension Plans ("FSP"),  which
      states that contract value is the relevant measurement  attribute for that
      portion of the net assets available for benefits of a defined-contribution
      plan attributable to fully benefit-responsive


                                       5


Community Bank System, Inc.
401(k) Employee Stock Ownership Plan
Notes to Financial Statements
December 31, 2006 and 2005
--------------------------------------------------------------------------------

      investment  contracts  because  contract value is the amount  participants
      would receive if they were to initiate  permitted  transactions  under the
      terms of the plan. As required by the FSP, the accompanying  Statements of
      Net  Assets  Available  for  Benefits  presents  the  fair  value  of  the
      investment   contracts   as  well   as  the   adjustment   of  the   fully
      benefit-responsive investment contracts from fair value to contract value.
      The  presentation  of the  2005  Statement  of Net  Assets  Available  for
      Benefits has been reclassified to comply with the requirements of the FSP.
      The accompanying Statement of Changes in Net Assets Available for Benefits
      is  prepared  on  a  contract  value  basis.   Contract  value  represents
      contributions  made under the contract,  plus earnings,  less  participant
      withdrawals  and  administrative  expenses.  Participants  may  ordinarily
      direct the withdrawal or transfer of all or a portion of their investments
      at contract value. There are no reserves against contract value for credit
      risk of the  contract  issuer or  otherwise.  If an event  occurs that may
      impair the ability of the contract  issuer to perform in  accordance  with
      the contract terms,  fair value may be less than contract  value.  For the
      year ended  December 31, 2006 the average yield utilized was 5.71% and the
      crediting interest rate to the fund was 4.95%.

      Payment of Benefits

      Benefits are recorded when paid.

      Administrative Expenses

      Certain administrative expenses are paid by the Company. These amounted to
      approximately $260,000 and $280,000,  including approximately $216,000 and
      $208,000 paid to Benefit Plans Administrative  Services,  Inc. ("BPA"), in
      2006 and 2005, respectively. (See Note D).

      Inactive Accounts

      Account  balances of individuals who have withdrawn from  participation in
      the  Plan  had an  accumulated  basis  of  approximately  $12,473,617  and
      $10,553,610 at December 31, 2006 and 2005, respectively.

      Use of Estimates

      The  preparation  of financial  statements in conformity  with  accounting
      principles  generally  accepted in the United  States of America  requires
      management  to make  estimates  and  assumptions  that affect the reported
      amount of assets and liabilities and disclosures of contingent  assets and
      liabilities  at the  date of the  financial  statements  and the  reported
      amounts of revenues  and  expenses  during the  reporting  period.  Actual
      results could differ from those estimates.

      Risks and Uncertainties

      The plan  provides  for  various  investment  options in mutual  funds and
      Company stock. Investment securities are exposed to various risks, such as
      interest rate, market and credit. Due to the level of risk associated with
      certain  investment  securities  and the level of  uncertainty  related to
      changes in the value of investment  securities,  it is at least reasonably
      possible  that  changes in risk in the near term would  materially  affect
      participants'  account balances and the amounts reported in the Statements
      of Net Assets  Available for Benefits and the Statements of Changes in Net
      Assets Available for Benefits.


                                       6


Community Bank System, Inc.
401(k) Employee Stock Ownership Plan
Notes to Financial Statements
December 31, 2006 and 2005
--------------------------------------------------------------------------------

C.    Investments

      Investments  are  held  within  various  common  funds  maintained  by the
      Community Bank, N.A. Trust Department.  Participants, at their discretion,
      may allocate contributions and account balances between various investment
      options  offered  by the Plan.  A brief  description  of these  investment
      options, as provided by the plan administrator, follows:

      Community Bank System,  Inc.  Employee Stock  Ownership Fund - these Funds
      invest in the common stock of the Plan sponsor, which is traded on the New
      York Stock Exchange under the symbol "CBU".

      SEI Stable Asset GIC Fund - a collective trust fund that holds primarily a
      diversified  portfolio  of stable  value  contracts  issued  by  insurance
      companies and banks.  Investments in the SEI Stable Asset GIC Fund are not
      marketable securities and are reported at contract value.

      American Funds  Washington  Mutual  Investors Fund Class A - a mutual fund
      that invests in common stocks and securities  convertible into such common
      stocks.

      Federated  Total Return Bond Fund - a mutual fund seeking to provide total
      return by investing  primarily in a  diversified  portfolio of  investment
      grade fixed income securities.

      Managers  Special  Equity  Fund - a mutual  fund  that  invests  in equity
      securities of small- and medium-sized U.S. companies.

      American  Funds  EuroPacific  Growth  Fund  Class A - a mutual  fund  that
      invests in stocks of issuers located in Europe and the Pacific Basin.

      Dreyfus  S&P 500 Index Fund - a mutual fund that  invests in equities  and
      seeks to match the performance of the S&P 500 Composite Stock Price Index.

      Federated  Mid-Cap  Index Fund - a mutual fund  primarily  that invests in
      stocks of U.S. companies.

      T. Rowe Price Blue Chip Growth Fund - a mutual fund primarily that invests
      in stocks of U.S. companies.

      TD Waterhouse IDA Account - participants select the individual  investment
      securities, including equity securities, mutual funds and bonds.

      The fair value of individual investments which represent 5% or more of net
      assets  available for benefits  ($3,252,084  for 2006 and  $2,859,338  for
      2005) at either December 31, 2006 or 2005 are as follows:


                                       7


Community Bank System, Inc.
401(k) Employee Stock Ownership Plan
Notes to Financial Statements
December 31, 2006 and 2005
--------------------------------------------------------------------------------



                                                                         2006            2005
                                                                         ----            ----
                                                                               
      Community Bank System, Inc. common stock                       $ 17,216,217    $ 16,199,821
      SEI Stable Asset GIC Fund                                        14,222,419      12,065,124
      American Funds Washington Mutual Investors Fund Class A           8,438,585       8,024,306
      American Funds EuroPacific Growth Fund Class A                    4,633,176       3,638,884
      Manager Special Equity Fund                                       3,803,606       3,430,912
      Federated Total Return Bond Fund                                  3,685,093       3,204,861
      T. Rowe Price Blue Chip Growth Fund                               3,525,900       3,055,382


      The Plan's investments appreciated (depreciated) in value as follows:



                                                                         2006            2005
                                                                         ----            ----
                                                                               
      Community Bank System, Inc. common stock                       $    392,660    $ (4,335,817)
      Mutual funds                                                      1,905,388         522,317
          Total net appreciation (depreciation) in fair value of
           investments
                                                                     ------------    ------------
                                                                     $  2,298,048    $ (3,813,500)
                                                                     ============    ============


D.    Transactions with Parties-in-Interest

      The assets of the Plan are  administered by BPA, a subsidiary of Community
      Bank System, Inc. The Company paid BPA approximately $216,000 and $208,000
      for  record  keeping,  trustee  and  other  services  in  2006  and  2005,
      respectively.

      The Plan held  748,531 and  718,396  shares of the Plan  sponsor's  common
      stock at  December  31,  2006 and  2005,  respectively.  The cost of these
      shares  at  December  31,  2006 and 2005 is  $10,790,133  and  $9,696,141,
      respectively,  and  their  fair  value at  December  31,  2006 and 2005 is
      $17,216,217 and $16,199,821, respectively.

      Dividends received on the investment in Community Bank System, Inc. common
      stock  amounted to $554,819 and $577,893 for the years ended  December 31,
      2006 and 2005,  respectively.  The Plan sold 198,641 and 212,964 shares of
      Community   Bank  System,   Inc.   common  stock  during  2006  and  2005,
      respectively,  and purchased  235,325 and 191,567 shares of Community Bank
      System, Inc. common stock during 2006 and 2005, respectively.

E.    Income Tax Status

      The Plan  obtained its most recent  determination  letter in July 2003, in
      which the Internal Revenue Service stated that the plan, as then designed,
      was in compliance  with Section  401(a) of the Internal  Revenue Code. The
      Plan has been amended since receiving the determination  letter,  however,
      the Plan  administrator  believes that the Plan is currently  designed and
      being  operated in  compliance  with the  applicable  requirements  of the
      Internal Revenue Code.

F.    Plan Merger

      On August 11, 2006, the Company acquired ES&L Bancorp,  the parent company
      of Elmira  Savings  and Loan and merged the Elmira  Savings  and Loan ESOP
      Plan into the Plan.  Accordingly,  total plan  assets of  $5,172,272  were
      transferred to the Plan.


                                       8


Community Bank System, Inc.
401(k) Employee Stock Ownership Plan
Schedule of Assets (Held at End of Year)
(Schedule H, Part IV, Item (i))
December 31, 2005
--------------------------------------------------------------------------------



(a)     (b) Identify of issue, borrower, lessor or      (c) Description of investment including      (e) Current
                       similar party                         maturity date, rate of interest,            value
                                                            collateral, par or maturity value
                                                                                                
      Mutual Funds

      American Funds Washington Mutual Investors Fund
      Class A                                                 Mutual fund - 242,071 shares            $ 8,438,585
      American Funds EuroPacific Growth Fund Class A          Mutual fund - 99,510 shares               4,633,176
      Managers Special Equity Fund                            Mutual fund - 45,849 shares               3,803,606
      Federated Total Return Bond Fund                        Mutual fund - 349,629 shares              3,685,093
      T. Rowe Price Blue Chip Growth Fund                     Mutual fund - 98,682 shares               3,525,900
      Dreyfus S&P 500 Index Fund                              Mutual fund - 72,430 shares               2,897,196
      Federated Mid-Cap Index Fund                            Mutual fund - 116,183 shares              2,665,245
                                                                                                      -----------
                                                                                                       29,648,801

      Common stock of plan sponsor
  *   Community Bank System, Inc.                             Common stock - 748,531 shares            17,216,217

      Collective Trust Fund
                                                              Collective trust fund - 14,596,758
 **   SEI Stable Asset GIC Fund                               shares                                   14,596,758

      Loan Fund
      Participant loans                                       Loan, 5.0% - 10.5%                        1,927,513

      Self Directed brokerage
      TD Waterhouse IDA Account                               Self-directed brokerage                     620,068

      Money Market Fund
      ReservePlus Money Market                                Money market fund  - 360,048 shares         360,048
                                                                                                      -----------
           Total investments                                                                          $64,369,405
                                                                                                      ===========


*   - Denotes party-in-interest

**  - Investment  stated at Contract  Value.  The fair value of the investment
      was $14,222,419.


                                       9