--------------------------------------------------------------------------------




                       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, 2000


                                       OR

   [     ]   TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
                              EXCHANGE ACT OF 1934

  For the transition period from ____________________ to _____________________

                          Commission file number 1-8246

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

                 Southwestern Energy Company 401(k) Savings Plan

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

                           Southwestern Energy Company
                         2350 N. Sam Houston Parkway E.
                                    Suite 300
                              Houston, Texas 77032




--------------------------------------------------------------------------------







                          SOUTHWESTERN ENERGY COMPANY

                               401(k) SAVINGS PLAN

              FINANCIAL STATEMENTS AS OF DECEMBER 31, 2000 AND 1999

             TOGETHER WITH REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS


























                           SOUTHWESTERN ENERGY COMPANY

                               401(k) SAVINGS PLAN

              INDEX TO FINANCIAL STATEMENTS AND SUPPORTING SCHEDULE

                           DECEMBER 31, 2000 AND 1999

                              FINANCIAL STATEMENTS

                                                                            Page

     Report of Independent Public Accountants                                 1

     Statements of Net Assets Available for Plan Benefits
       as of December 31, 2000 and 1999                                       2

     Statement of Changes in Net Assets Available for Plan Benefits
       for the year ended December 31, 2000                                   3

     Notes to Financial Statements                                            4


                    SCHEDULE SUPPORTING FINANCIAL STATEMENTS

Schedule of Assets Held for Investment Purposes, Form 5500, Schedule H,
       Item 4i -  December 31, 2000                                           8












                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

     To the Retirement Committee of
       Southwestern Energy Company:

     We have audited the  accompanying  statements  of net assets  available for
     benefits of the Southwestern  Energy Company 401(k) Savings Plan (the Plan)
     as of December 31, 2000 and 1999,  and the related  statement of changes in
     net assets  available  for benefits  for the year ended  December 31, 2000.
     These  financial  statements  and the  schedule  referred  to below are the
     responsibility of the Plan's  management.  Our responsibility is to express
     an opinion on these financial statements and schedule based on our audits.

     We conducted our audits in accordance  with  auditing  standards  generally
     accepted in the 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.  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,  2000 and  1999,  and the  changes  in its net  assets
     available for benefits for the year ended  December 31, 2000, in conformity
     with accounting principles generally accepted in the United States.

     Our audit was made 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 is  presented  for  purposes  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. 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.


     Authur Andersen LLP


     Tulsa, Oklahoma
       May 11, 2001

                                        1




                           SOUTHWESTERN ENERGY COMPANY

                               401(k) SAVINGS PLAN

              STATEMENTS OF NET ASSETS AVAILABLE FOR PLAN BENEFITS

                           DECEMBER 31, 2000 AND 1999



                                                       2000             1999
                                                   ------------     ------------
                                                              
     ASSETS:
     Investments (Notes 1 and 4):
       Mutual funds                                $ 10,614,180     $ 12,351,416
       Common collective trusts                       7,057,979        8,203,248
       Common stock                                     697,907          602,225
       Participant loans                                440,428          420,255
                                                   ------------     ------------
                                                     18,810,494       21,577,144
                                                   ------------     ------------
     Other assets:
       Contributions receivable                         102,193          136,342

     LIABILITIES:
       Payable to plan participants                        -               3,364
                                                   ------------     ------------

     NET ASSETS AVAILABLE FOR PLAN BENEFITS        $ 18,912,687     $ 21,710,122
                                                   ============     ============





                     The accompanying notes are an integral
                            part of these statements.







                                        2




                           SOUTHWESTERN ENERGY COMPANY

                               401(k) SAVINGS PLAN

         STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR PLAN BENEFITS

                      FOR THE YEAR ENDED DECEMBER 31, 2000


                                                                
     NET ASSETS AVAILABLE FOR PLAN BENEFITS,
       beginning of year                                           $ 21,710,122
                                                                   ------------

     CHANGES DURING THE YEAR (Note 1):
       Contributions:
          Employee                                                    2,184,767
          Employer                                                      694,173
       Interest and dividend income                                   1,200,353
       Net depreciation in fair value of investments                 (1,301,938)
       Withdrawals by participants                                   (2,081,496)
       Other                                                             (4,437)
                                                                   ------------

                 Net change during the year                             691,422
                                                                   ------------

       Distribution to acquiring company (Note 7)                    (3,488,857)
                                                                   ------------

     NET ASSETS AVAILABLE FOR PLAN BENEFITS,
       end of year                                                 $ 18,912,687
                                                                   ============





                          The accompanying notes are an
                        integral part of this statement.












                                        3




                           SOUTHWESTERN ENERGY COMPANY

                               401(k) SAVINGS PLAN

                          NOTES TO FINANCIAL STATEMENTS

                           DECEMBER 31, 2000 AND 1999


     1.  DESCRIPTION OF THE PLAN AND ACCOUNTING POLICIES:

     Scope of the Plan

     The Southwestern Energy Company 401(k) Savings Plan (the Plan) is a defined
     contribution plan that covers all employees of Southwestern  Energy Company
     (the Company) and its subsidiaries except for:

     (a) Employees who have not yet completed thirty (30) days of service.

     (b) Employees under the age of twenty-one (21).

     (c) Seasonal  employees  who have  one thousand  (1,000) or  less  hours of
         service for the applicable computation period.

     Participation by eligible employees in the Plan is voluntary.

     Administration

     The trust under the Plan is operated  under a trust  agreement with Scudder
     Trust Company.

     Plan Assets

     Mutual  funds,  common  collective  trusts,  and common stock are valued at
     year-end market prices.  Interest earned and dividends declared but not yet
     received  are  accrued  and  included  in  earnings  of the  Plan  for  the
     respective periods.

     Plan Expenses

     Expenses  incurred  in  connection  with the Plan are paid by the  Company.
     During  2000,  the Company  paid $21,779 in expenses on behalf of the Plan.
     Brokerage  commissions  and  transfer  taxes  incurred in  connection  with
     securities  transactions  are treated as a part of the  purchase  cost or a
     reduction of sale proceeds.

     Contributions and Funding Policy

     Participants  may  contribute  from one percent to sixteen percent of their
     compensation in  Salary  Reduction  Contributions, as defined.  The Company
     matches fifty percent of  the first six percent of employee  contributions.
     All  contributions  to the  Plan are invested  under the  direction  of the
     participant in nine separate funds.

                                        4




     Vesting

     Contributions  made by participants are fully vested.  Participants vest in
     the  Company's  contributions  to the Plan as set  forth  in the  following
     schedule:



                       Years of
                   Vesting Service                  Percent Vested
                   ---------------                  --------------
                                                       
                          1                                 0%
                          2                                50%
                          3                               100%


     Forfeitures

     Forfeited   nonvested   amounts   will  be  applied  to  restore   matching
     contributions  of any  Plan  participants  because  of a  valid  repayment.
     Remaining forfeitures will be used to reduce Plan expenses.  Any forfeiture
     amounts  which remain  following  payment of Plan  expenses will be used to
     reduce employer matching contributions. At December 31, 2000, there was $89
     in forfeitures available to be used for the purposes stated above.

     Participants' Accounts

     Each participant's account is credited with the participant's  contribution
     and an allocation of:

     (a) The Company's contribution.
     (b) The Plan's investment earnings.

     The allocation of the Plan's investment earnings is performed at the end of
     each calendar quarter.

     The Plan permits  current  participants to apply for and receive loans that
     represent  borrowings from a participant's  account.  The maximum amount of
     any loan available under the Plan is limited to the lesser of $50,000 or 50
     percent of a participant's vested account balance.

     Although withdrawals from active  participants'  accounts are restricted by
     the Plan,  various options are available to participants which are based on
     the type of contributions made, age of the participant and other factors.

     On termination  of service due to death or  disability,  a participant or a
     participant's  estate may receive the full value of his or her account in a
     lump sum. For  termination of service due to other  reasons,  a participant
     may  receive  the value of the vested  interest  in his or her account as a
     lump sum distribution.

     Participants  may  change  their   contribution   percentages,   investment
     elections,  transfer  balances between funds,  and apply for  distributions
     24-hours  a day  either  through  telephone  access on the Pilot  System or
     internet access on the Scudder InterActive Account.

     Basis of Accounting

     The Plan's  financial  statements  are  presented  on the accrual  basis of
     accounting.  The preparation of the financial statements in conformity with
     accounting  principles generally accepted in the United States requires the
     Plan's  management  to  use  estimates  and  assumptions  that  affect  the
     accompanying  financial  statements and  disclosures.  Actual results could
     differ from these estimates.

                                        5



     Plan Amendments

     Effective  during  the  year,  the Board  of Directors  approved  the  Vice
     President - Human Resources as the  Plan  Administrator for  administrative
     duties associated with the Savings Plan.

     2.  TERMINATION OF THE PLAN:

     The Plan gives the Company the right to discontinue  its  contributions  at
     any time  and to  terminate  the  Plan  subject  to the  provisions  of the
     Employee  Retirement  Income Security Act of 1974 (ERISA).  In the event of
     Plan  termination,  participants  will  become  100  percent  vested in the
     contributions made by the Company.

     3.  TAX STATUS:

     The  Internal  Revenue Service issued a determination letter dated November
     7, 1994, stating that the Plan  was designed in accordance  with applicable
     requirements of the  Internal Revenue  Code.  On January 1, 1999,  the Plan
     adopted  the  Scudder  Non-Standardized  Plan  Document  which  received  a
     favorable Internal Revenue Service determination letter on May 9, 1996. The
     Plan has been amended since receiving the  determination  letter.  However,
     the Plan  administrator  and the Plan's legal counsel believe that the Plan
     is currently  designed and being operated in compliance with the applicable
     requirements  of the Internal  Revenue  Code.  Therefore,  no provision for
     income taxes has been included in the Plan's financial statements.

     4.  INVESTMENTS:

     The following  investments represent five percent or more of the net assets
     available for benefits at December 31, 2000 and 1999:


                                                    Market Value at December 31,
       Description of Asset                              2000           1999
       --------------------                          -----------    -----------
                                                              
     Scudder Trust Company Growth and Income Fund    $ 5,323,676    $ 7,324,630
     Scudder Trust Company Collective Investment
       Trust Stable Value Fund                         3,441,662      4,642,777
     Scudder Trust Company Collective Investment
       Trust Stock Index Fund                          3,616,317      3,560,471
     Scudder Trust Company Pathway Series -
       Balanced Fund                                   1,780,476      2,118,333
     INVESCO Funds Group, Inc. Selected Income Fund    1,551,501      1,523,300
     Baron Asset Fund                                  1,146,322        733,199


     5.  BENEFITS PAYABLE:

     Amounts  allocated for benefits  requested by participants  before year end
     but not paid until after year end were  $66,837 and $92,514 at December 31,
     2000 and 1999, respectively.

     6.  NET APPRECIATION (DEPRECIATION) IN FAIR VALUE OF INVESTMENTS:

     Net  appreciation  (depreciation)  by investment  type for  the year  ended
     December 31, 2000 was as follows:

                                          
       Mutual funds                          $  (348,498)
       Common collective trusts               (1,229,944)
       Common stock                              276,504
                                             -----------
                                             $(1,301,938)
                                             ===========


                                       6



     7.  SALE OF SUBSIDIARY ASSETS:

     On May 31, 2000, the Missouri  assets of one of the Company's  subsidiaries
     were sold to another company.  As a result,  87 employees and their related
     Plan  accounts  were  transferred  to a  defined  contribution  plan of the
     acquiring company.











                                        7



                           SOUTHWESTERN ENERGY COMPANY

                               401(k) SAVINGS PLAN

 SCHEDULE OF ASSETS HELD FOR INVESTMENT PURPOSES-FORM 5500, SCHEDULE H, ITEM 4i

                                 EIN 71-0205415

                                DECEMBER 31, 2000


                                       DESCRIPTION OF INVESTMENT
                                       INCLUDING MATURITY DATE,
   IDENTITY OF ISSUE, BORROWER,      RATE OF INTEREST, COLLATERAL,      CURRENT
     LESSOR, OR SIMILAR PARTY           PAR, OR MATURITY VALUE           VALUE
 --------------------------------    -----------------------------    ----------
                                                                
 Entergy Corporation                 4,435.16 Common Shares           $  187,663

 Southwestern Energy Company*        50,731.50 Common Shares             510,244

 Scudder Trust Company Collective
  Investment Trust*                  Stable Value Fund                 3,441,662

 Scudder Trust Company Collective
  Investment Trust*                  Stock Index Fund                  3,616,317

 Scudder Trust Company*              Pathway Series-Balanced Fund      1,780,476

 Scudder Trust Company*              Growth and Income Fund            5,323,676

 Scudder Trust Company*              International Fund                  563,414

 Scudder Trust Company*              21st Century Growth Fund            248,791

 Baron Capital Inc.                  Asset Fund                        1,146,322

 INVESCO Funds Group, Inc.           Select Income Fund                1,551,501

 Various plan participants*          Participant loans with
                                     interest rates from 8.75%
                                     to 10.50% and various
                                     maturities                          440,428
                                                                     -----------
                                                                     $18,810,494
                                                                     ===========

 * Parties-in-interest


                                        8




                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
  the  Administrator of the Plan has duly caused this annual report to be signed
  on its behalf by the undersigned hereunto duly authorized.



                                                 SOUTHWESTERN ENERGY COMPANY
                                                     401(k) SAVINGS PLAN

  Date:  June 28, 2001                           BY:   /s/ GREG D. KERLEY
  ---------------------------                    -----------------------------
                                                        Greg D. Kerley
                                                    Executive Vice President
                                                   And Chief Financial Officer





EXHIBIT 23.1



                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation of our
report dated May 11, 2001, included in this 11-K,  into the Company's previously
filed  Registration  Statements  on Form S-8  (File Nos.  333-03787,  333-03789,
333-64961, 333-96161, and 333-42494).

Arthur Andersen LLP

Tulsa, Oklahoma
 June 27, 2001




     Southwestern Energy Company
     P.O. Box 1408
     Fayetteville, AR 72702-1408



     June 28, 2001



     Securities and Exchange Commission
     ATTN: Filing Desk, Stop 1-4
     450 Fifth Street, N.W.
     Washington, DC  20549-1004

     Gentlemen:

     Pursuant  to  regulations  of  the  Securities  and  Exchange   Commission,
     submitted  herewith for filing on behalf of Southwestern  Energy Company is
     the Annual Report on Form 11-k, dated June 28, 2001.

     This filing is being effected by direct  transmission  to the  Commission's
     EDGAR System.

     Very truly yours,

     Stan Wilson
     Controller