EXHIBIT 99.1


KERR-McGEE CORPORATION
Kerr-McGee Center
Oklahoma City, Oklahoma 73125


                            CERTIFICATION OF CHAIRMAN
                      REGARDING PERIODIC REPORT CONTAINING
                              FINANCIAL STATEMENTS


I, Robert M.  Wohleber,  the  Chairman of the Benefits  Committee of  Kerr-McGee
Corporation  (the  "Issuer"),  in  compliance  with 18 U.S.C.  Section  1350, as
adopted  pursuant  to  Section  906 of the  Sarbanes-Oxley  Act of 2002,  hereby
certify  in  connection  with the  Issuer's  Annual  Report on Form 11-K for the
period that ended  December 31, 2002 as filed with the  Securities  and Exchange
Commission (the "Report") that:

     o    the Report fully complies with the  requirements  of Sections 13(a) or
          15(d) of the Securities Exchange Act of 1934; and

     o    information  contained in the Report fairly presents,  in all material
          respects,  the  financial  condition  and results of operations of the
          Issuer.



/s/ Robert M. Wohleber
- ----------------------
Robert M. Wohleber
Chairman
June 27, 2003




















A signed  original of this  written  statement  required by Section 906 has been
provided  to  Kerr-McGee   Corporation   and  will  be  retained  by  Kerr-McGee
Corporation and furnished to the Securities and Exchange Commission or its staff
upon request.




                                                                    EXHIBIT 99.2


KERR-McGEE CORPORATION
Kerr-McGee Center
Oklahoma City, Oklahoma 73125


                        CERTIFICATION REGARDING PERIODIC
                     REPORT CONTAINING FINANCIAL STATEMENTS


I,  Elizabeth T.  Wilkinson,  a member of the Benefits  Committee of  Kerr-McGee
Corporation  (the  "Issuer"),  in  compliance  with 18 U.S.C.  Section  1350, as
adopted  pursuant  to  Section  906 of the  Sarbanes-Oxley  Act of 2002,  hereby
certify  in  connection  with the  Issuer's  Annual  Report on Form 11-K for the
period that ended  December 31, 2002 as filed with the  Securities  and Exchange
Commission (the "Report") that:

     o    the Report fully complies with the  requirements  of Sections 13(a) or
          15(d) of the Securities Exchange Act of 1934; and

     o    information  contained in the Report fairly presents,  in all material
          respects,  the  financial  condition  and results of operations of the
          Issuer.



/s/ Elizabeth T. Wilkinson
- --------------------------
Elizabeth T. Wilkinson
June 27, 2003




















A signed original of this written statement required by Section 906 has been
provided to Kerr-McGee Corporation and will be retained by Kerr-McGee
Corporation and furnished to the Securities and Exchange Commission or its staff
upon request.