Exhibit 32.1


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


                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
                      REGARDING PERIODIC REPORT CONTAINING
                              FINANCIAL STATEMENTS


I, Luke R. Corbett,  the Chief Executive Officer 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  Quarterly  Report on Form 10-Q for the period that ended September
30, 2003 as filed with the  Securities  and Exchange  Commission  (the "Report")
that:

     o the Report fully complies with the  requirements  of Section 13(a) 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/ Luke R. Corbett
- ----------------------

Luke R. Corbett
Chief Executive Officer
November 11, 2003






                                                                   Exhibit 32.2


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


                    CERTIFICATION OF CHIEF FINANCIAL OFFICER
                      REGARDING PERIODIC REPORT CONTAINING
                              FINANCIAL STATEMENTS


I, Robert M. Wohleber,  the Chief  Financial  Officer 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  Quarterly  Report on Form  10-Q for the  period  that  ended
September 30, 2003 as filed with the  Securities  and Exchange  Commission  (the
"Report") that:

     o the Report fully complies with the  requirements  of Section 13(a) 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
Chief Financial Officer
November 11, 2003