SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 11-K

                   ANNUAL REPORT PURSUANT TO SECTION 15(D) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

(Mark One)

[ X ]    ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE
         SECURITIES EXCHANGE ACT OF 1934
         (Fee Required)

         For the fiscal year ended December 31, 2002

                                       Or

[   ]    TRANSITION REPORT PURSUANT TO SECTION 15(d)OF THE SECURITIES EXCHANGE
         ACT OF 1934
         (No Fee Required)

         For the transition period from ___________ to __________



         Commission File No. 1-13726


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

                CHESAPEAKE ENERGY CORPORATION SAVINGS AND INCENTIVE
                                STOCK BONUS PLAN
                            6100 NORTH WESTERN AVENUE
                             OKLAHOMA CITY, OK 73118

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

                          CHESAPEAKE ENERGY CORPORATION
                            6100 NORTH WESTERN AVENUE
                             OKLAHOMA CITY, OK 73118




CHESAPEAKE ENERGY CORPORATION SAVINGS AND INCENTIVE STOCK BONUS PLAN
FINANCIAL STATEMENTS AND SUPPLEMENTAL SCHEDULES
DECEMBER 31, 2002 AND 2001




CHESAPEAKE ENERGY CORPORATION
SAVINGS AND INCENTIVE STOCK BONUS PLAN
CONTENTS
DECEMBER 31, 2002 AND 2001
-------------------------------------------------------------------------------


                                                                        PAGE(S)

REPORT OF INDEPENDENT AUDITORS................................................2

FINANCIAL STATEMENTS

Statements of Net Assets Available for Benefits...............................3

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

Notes to Financial Statements.................................................4

SUPPLEMENTAL SCHEDULES

Schedule of Assets (Held at End of Year)......................................8

Schedule of Reportable Transactions...........................................9





                         REPORT OF INDEPENDENT AUDITORS


To the Participants and the Members of the Oversight Committee of the
Chesapeake Energy Corporation Savings and Incentive Stock Bonus Plan


In our opinion the accompanying  statements of net assets available for benefits
and the  related  statements  of changes in net assets  available  for  benefits
present fairly, in all material respects,  the net assets available for benefits
of the Chesapeake Energy Corporation Savings and Incentive Stock Bonus Plan (the
"Plan") at December 31, 2002 and 2001,  and the changes in net assets  available
for benefits for the years then ended, in conformity with accounting  principles
generally accepted in the United States of America.  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 of these  financial  statements in accordance with auditing
standards generally accepted in the United States of America, which 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,   assessing  the  accounting  principles  used  and
significant  estimates made by management,  and evaluating the overall financial
statement  presentation.  We believe that our audits provide a reasonable  basis
for our opinion.

Our audits  were  conducted  for the  purpose of forming an opinion on the basic
financial  statements  taken as a whole.  The  supplemental  schedules of Assets
(Held at End of Year) and Reportable  Transactions are presented for the purpose
of  additional  analysis  and are not a  required  part of the  basic  financial
statements  but are  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.  These  supplemental  schedules are the
responsibility of the Plan's management.  These supplemental schedules have been
subjected  to the  auditing  procedures  applied  in  the  audits  of the  basic
financial  statements  and, in our  opinion,  are fairly  stated in all material
respects in relation to the basic financial statements taken as a whole.


PricewaterhouseCoopers LLP


June 6, 2003
Oklahoma City, Oklahoma


                                        2





CHESAPEAKE ENERGY CORPORATION
SAVINGS AND INCENTIVE STOCK BONUS PLAN
STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
DECEMBER 31, 2002 AND 2001
-------------------------------------------------------------------------------
                                                 2002              2001
                                            -------------      -------------

Assets                                      $  27,925,744      $  20,727,877
Investments
Receivables
  Employer contribution                            84,673                  -
  Participants' contributions                      85,053                  -
  Dividends                                        72,339                  -
Cash                                               85,041             20,530
                                            -------------       ------------
  Total assets                                 28,252,850         20,748,407
                                            =============       ============



Liabilities
Accrued liabilities                                28,794             27,319
                                            -------------      -------------
  Net assets available for benefits         $  28,224,056      $  20,721,088
                                            =============      =============




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


CHESAPEAKE ENERGY CORPORATION
SAVINGS AND INCENTIVE STOCK BONUS PLAN
STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
YEARS ENDED DECEMBER 31, 2002 AND 2001
-------------------------------------------------------------------------------

                                                 2002              2001
                                            -------------      -------------


Additions to net assets attributed to
Investment income
  Interest and dividends                    $     293,691      $     216,172
  Net appreciation (depreciation)
  in fair value of investments                  1,572,008         (6,773,115)
                                            -------------      --------------

  Total investment income (loss)                1,865,699         (6,556,943)
                                            -------------      --------------

Contributions
  Employer                                      2,876,857          1,837,636
  Participants                                  3,507,850          2,298,617
                                            -------------      --------------
  Total contributions                           6,384,707          4,136,253
                                            -------------      --------------
  Total additions                               8,250,406         (2,420,690)

Deductions from net assets attributed to
Benefits paid to participants                     693,203            392,858
Administrative expenses                            54,235             59,260
                                            -------------      --------------
  Total deductions                                747,438            452,118
                                            -------------      --------------
  Net increase (decrease)                   $   7,502,968      $  (2,872,808)

Net assets available for benefits
Beginning of the year                          20,721,088         23,593,896
                                            -------------      --------------

End of the year                             $  28,224,056      $  20,721,088
                                            =============      ==============





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

                                       3



CHESAPEAKE ENERGY CORPORATION
SAVINGS AND INCENTIVE STOCK BONUS PLAN
NOTES TO FINANCIAL STATEMENTS
DECEMBER 31, 2002 AND 2001
-------------------------------------------------------------------------------


1. DESCRIPTION OF THE PLAN

         The  following  is a brief  summary of the  various  provisions  of the
         Chesapeake  Energy  Corporation  Savings and Incentive Stock Bonus Plan
         (the  "Plan").  Participants  should refer to the Plan  agreement for a
         complete description of the Plan's provisions.

         GENERAL
         The Plan is a defined  contribution  plan that covers all  employees of
         Chesapeake  Energy  Corporation and its  subsidiaries  (the "Company"),
         except for the employees of NOMAC Drilling Corporation,  a wholly-owned
         subsidiary.

         CONTRIBUTIONS
         Each  year,  participants  may  contribute  up to 15 percent of pre-tax
         annual  compensation,  as  defined in the Plan.  Participants  may also
         contribute  amounts  representing  rollover  distributions  from  other
         qualified plans. During 2001 the Company contributed 100 percent of the
         first 10 percent of base compensation that a participant contributed to
         the Plan.  Effective  January 1, 2002 the Plan was  amended to increase
         the maximum of employer  matching  contributions  to 100 percent of the
         first  15  percent  of   participant   contributions.   Profit  sharing
         contributions  may be made at the discretion of the Company's  board of
         directors.  No discretionary profit sharing  contributions were made in
         2002 and 2001. Contributions are subject to certain limitations.

         The  Company's  matching  contribution  is used to  purchase  shares of
         Chesapeake Energy  Corporation Common Stock (the "Common Stock") on the
         open market.  Participants may also elect to direct all or a portion of
         their contributions into the Common Stock.

         PARTICIPANT ACCOUNTS
         Each   participant's   account  is  credited  with  the   participant's
         contribution  and  allocations of the Company's  contribution  and Plan
         earnings.  Allocations  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
         balance.

         VESTING
         Participants are immediately vested in their  contributions plus actual
         earnings thereon.  Vesting in the Company's matching and profit sharing
         contributions  plus  actual  earnings  thereon  is  based  on  years of
         credited  service  or  participant's  age.  A  participant  will be 100
         percent vested after six years of credited  service.  Effective July 1,
         2003,  a  participant  will be 100 percent  vested  after five years of
         credited service.  Additionally, a participant will become fully vested
         upon  attaining  age 55,  early  retirement  age under  the  plan,  and
         completing five years of service.



                                       4



         PARTICIPANT NOTES RECEIVABLE
         Participants may borrow from their accounts a minimum of $1,000 up to a
         maximum  equal to the lesser of  $50,000 or 50 percent of their  vested
         account  balance.  Loan terms range from one to five years or up to ten
         years  for  the  purchase  of  a  primary  residence.   The  loans  are
         collateralized  by the  balance in the  participant's  account and bear
         interest at the Prime  Interest  Rate.  Principal  and interest is paid
         ratably  through  semi-monthly  payroll  deductions.  Interest rates on
         loans outstanding at December 31, 2002 ranged from 4.75 percent to 9.75
         percent.

         PAYMENT OF BENEFITS
         Upon termination of service due to death, retirement or separation from
         service,  a participant  may elect to receive either a lump-sum  amount
         equal to the value of the  participant's  vested interest in his or her
         account, annual installments,  or have the value rolled over to another
         qualified plan or IRA. Those participants who were Plan participants as
         of  December 31, 1999 may elect to  receive  benefits  in the form of
         annuity payments.

         AMOUNTS FORFEITED
         Forfeited  nonvested  amounts  are  first  used  to pay  administrative
         expenses  of the Plan or to restore  unvested  amounts  to  re-employed
         participants.  Any  remaining  forfeitures  are used to reduce  Company
         contributions  into the  Plan.  Forfeited  nonvested  accounts  totaled
         $155,929  and  $151,097  at December  31, 2002 and 2001,  respectively.
         During 2002  forfeited  nonvested  accounts  of  $111,429  were used to
         reduce   employer   matching   contributions   and   $48,019   to   pay
         administrative expenses of the Plan.


2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

         BASIS OF ACCOUNTING
         The  financial  statements  of the Plan are prepared  under the accrual
         method of accounting.

         USE OF ESTIMATES
         The  preparation of financial  statements in conformity  with generally
         accepted  accounting  principles  requires management to make estimates
         and  assumptions  that  affect  the  reported  amounts  of  net  assets
         available for benefits at the date of the financial  statements and the
         changes in net  assets  available  for  benefits  during the  reporting
         period. Actual results could differ from those estimates.

         INVESTMENT VALUATION AND INCOME RECOGNITION
         The Plan's investments are stated at fair value. Shares of mutual funds
         are  valued at quoted  market  prices on the last  business  day of the
         year.  Chesapeake  Energy  Corporation  common  stock is  valued at the
         closing market price on the last business day of the year, according to
         the New York Stock Exchange. Participant loans receivable are valued at
         outstanding principal balance, which approximates fair value.

         Purchases and sales of securities  are recorded on a trade-date  basis.
         Investment  income is  recorded  on the accrual  basis.  Dividends  are
         recorded on the ex-dividend date.

         The Plan presents,  in the statement of changes in net assets available
         for benefits, the net appreciation  (depreciation) in the fair value of
         investments  which  consists  of the  realized  gains or losses and the
         unrealized appreciation (depreciation) on those investments.

         PAYMENT OF BENEFITS
         Benefits are recorded when paid.

         RISKS AND UNCERTAINTIES
         Investment  securities are exposed to various  risks,  such as interest
         rate, market, and credit risk. Due to the level of risk associated with
         certain investment securities,  it is at least reasonably possible that
         changes in value of investment  securities  will occur in the near term
         and that such changes could  materially  affect  participants'  account
         balances  and the  amounts  reported  in the  statement  of net  assets
         available  for  benefits  and the  statement  of  changes in net assets
         available for benefits.


                                       5




3.       INVESTMENTS

         The following presents  investments that represent five percent or more
         of the Plan's net assets:


                                                    2002              2001
                                                 -----------    --------------


Chesapeake Energy Corporation Common Stock       $18,663,410 *   $13,066,600 *
Fidelity Retirement Money Market Fund              2,008,864       1,444,950


*  Balances include nonparticipant-directed investments

        The Plan's investments  (including gains and losses on investment bought
        and sold, as well as held during the year) appreciated  (depreciated) in
        value as follows:

                                                     2002              2001
                                                  -----------     -------------


Mutual Funds                                      $(1,238,182)    $   (574,569)
Chesapeake Energy Corporation Common Stock          2,810,190       (6,198,546)
                                                  -----------       ----------
                                                  $ 1,572,008     $ (6,773,115)
                                                  ============    =============

4. NONPARTICIPANT-DIRECTED INVESTMENTS

         Investment in the Chesapeake Energy  Corporation  common stock includes
         balances  arising  from   nonparticipant-directed   employer   matching
         contributions,  as  well  as  participant-directed   contributions  and
         transfers  from other  investment  options.  Information  about the net
         assets  and the  significant  components  of the  changes in net assets
         relating to  investments in the Chesapeake  Energy  Corporation  common
         stock is as follows:

                                                    2002              2001
                                                -------------      -------------


         Net assets
         Cheapeake Energy Corporation
         common stock                           $  18,663,410    $  13,066,600
                                                -------------    --------------

         Changes in net assets
         Contributions                          $   3,350,369    $   2,288,132
         Net appreciation (depreciation)            2,810,190       (6,198,546)
         Benefits paid to participants               (372,741)        (218,364)
         Transfers from (to) other
         investments options, net                    (191,009)        (151,513)
                                                --------------    -------------
                                                 $  5,596,809     $ (4,280,291)
                                                --------------    -------------

5. PARTY-IN-INTEREST TRANSACTIONS

         Certain Plan  investments are shares of Chesapeake  Energy  Corporation
         common stock. These transactions  represent investments in the Company,
         and, therefore,  qualify as  party-in-interest  transactions.  Further,
         certain Plan investments are shares of mutual funds managed by Fidelity
         Investments.  Fidelity  Management  Trust  Company  is the  trustee  as
         defined  by the Plan,  and,  therefore,  transactions  in mutual  funds
         managed  by   Fidelity   Investments   qualify   as   party-in-interest
         transactions.


6. TAX STATUS

         The Plan obtained its latest determination letter on April 22, 1997, in
         which the  Internal  Revenue  Service  stated  that the  Plan,  as then
         designed,  was in compliance  with the applicable  requirements  of the
         Internal  Revenue  Code (the "IRC").  The Plan has been  amended  since
         receiving the determination letter. However, the plan administrator and
         the plan's tax counsel believe the Plan is currently designed and being
         operated in compliance  with the  applicable  requirements  of the IRC.
         Therefore,  no  provision  for income  taxes has been  included  in the
         plan's financial statements.



                                       6





7. PLAN TERMINATION

         Although the Company has not expressed any intent to do so, the Company
         reserves  the right to  change,  amend or  discontinue  the Plan at any
         time,   subject  to  the   provisions   of  ERISA.   In  the  event  of
         discontinuance of the Plan, participants will become 100 percent vested
         in their accounts.


8. CONCENTRATION OF INVESTMENTS

         As of December 31, 2002 net assets available for benefits in the amount
         of $18,663,410 and $8,422,856 were invested in Chesapeake Energy Common
         Stock and mutual funds managed by Fidelity Investments, respectively.


9. RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500

         The following is a reconciliation  of net assets available for benefits
         as of December  31, 2002 and 2001,  as  reflected  in the  accompanying
         financial statements to the Form 5500:

                                                 2002              2001
                                            -------------      -------------


         Net Assets available for
         benefits per the
         financial statements               $  28,224,056      $  20,721,088
         Add:  Accrued administrative
         expenses                                  28,794             27,319
         Less:  Accrued dividend
         income                                    72,339                  -
                                            -------------      -------------
         Net assets available
         for benefits per the Form 5500     $  28,180,511      $  20,748,407
                                            -------------      -------------

         The following is a reconciliation  of  administrative  expenses for the
         year ended December 31, 2002 and 2001, as reflected in the accompanying
         financial statements to the Form 5500:


                                                 2002              2001
                                            -------------      -------------


         Administrative expenses per the
         financial statements               $      54,235             59,260
         Add:  Previous year accrued
         administrative expenses                   27,319                  -
         Less: Current year accrued
         administrative expenses                  (28,794)           (27,319)
                                            --------------      -------------

         Administrative expenses per
         the Form 5500                      $     52,760       $     31,941
                                            =============       ============

        Administrative expenses are recorded on the Form 5500 when paid.



                                       7





CHESAPEAKE ENERGY CORPORATION
SAVINGS AND INCENTIVE STOCK BONUS PLAN
SCHEDULE H, Line 4i - Schedule of Assets (Held at End of Year)
DECEMBER 31, 2002
-------------------------------------------------------------------------------

                                        Description of
                                     Investment Including
                                        Maturity Date
Identity of Issue, Borrower,         Collateral Par, or
 Lessor, or Similar Party               Maturity Value       Cost      Value


*Chesapeake Energy Corporation        Common Stock     $ 9,639,691  $18,663,410
*Fidelity Equity Inc.                 Mutual Funds          **          464,155
*Fidelity Growth Co.                  Mutual Funds          **          594,248
*Fidelity OTC Portfolio               Mutual Funds          **          287,575
*Fidelity Low Priced Stock Fund       Mutual Funds          **        1,124,063
*Fidelity Aggressive Growth           Mutual Funds          **          524,494
*Fidelity Diversified                 Mutual Funds          **
  International Fund                  Mutual Funds          **          807,177
*Fidelity Freedom Income              Mutual Funds          **           55,011
*Fidelity Freedom 2000                Mutual Funds          **           75,647
*Fidelity Freedom 2010                Mutual Funds          **          532,643
*Fidelity Freedom 2020                Mutual Funds          **          434,014
*Fidelity Freedom 2030                Mutual Funds          **          245,924
*Fidelity Freedom 2040                Mutual Funds          **            6,307
*Fidelity Retirement Money Market     Mutual Funds          **        2,008,864
*Spartan US Equity Index              Mutual Funds          **        1,262,734
 Brokeragelink participant-           Common Stock          **          145,852
   directed brokerage accounts
 Alger Small Cap Institutional        Mutual Funds          **           61,948
 Templeton Foreign A                  Mutual Funds          **           70,833
 Participant Loans                 Interest Rates Ranging   **
                                     From 4.75% to 9.75%                560,845
                                                                     ----------
                                                                    $27,925,744
                                                                    ===========

 *  Identifies parties-in-interest

** Identifies  particpant-directed  investment options for which presentation of
cost in the Schedule of Assets (Held at End of Year) is not required.


                                       8



CHESAPEAKE ENERGY CORPORATION
SAVINGS AND INCENTIVE STOCK BONUS PLAN
SCHEDULE H, Line 4j - Schedule of Reportable Transactions
DECEMBER 31, 2002
-------------------------------------------------------------------------------

Description        Number of     Number of     Total       Total
 of Assets         Purchases       Sales     Purchase      Selling     Net Gain
                                               Price       Price         (Loss)


Chesapeake Energy
 Corporation
 Stock Purchases       27             -      $ 3,002,355   $     -    $      -
                                             -----------   -------    --------


                                       9





                                   SIGNATURES

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

                                         CHESAPEAKE ENERGY CORPORATION
                                         SAVINGS AND INCENTIVE STOCK BONUS PLAN

                                         /s/ Mary Whitson
                                         ----------------------------------
                                         Mary Whitson, Plan Administrator

Date:  June 30, 2003


                                       10




                                  EXHIBIT INDEX


Exhibit                                  Description
-------                                  -----------

23     Consent of PricewaterhouseCoopers LLP

99.1 - Marcus C. Rowland, Executive Vice President and Chief Financial Officer,
       Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to
       Section 906 of the Sarbanes-Oxley Act of 2002.

99.2   Martha A, Burger, Senior Vice President and Treasurer,
       Certification Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to
       Section 906 of the Sarbanes-Oxley Act of 2002.


                                       11