Exhibit 31.1
                                                                    ------------

                                  CERTIFICATION

I, Luke R. Corbett, certify that:

     1.   I have  reviewed  this  quarterly  report on Form  10-Q of  Kerr-McGee
          Corporation (the "company");

     2.   Based on my  knowledge,  this  quarterly  report  does not contain any
          untrue  statement of a material  fact or omit to state a material fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this quarterly report;

     3.   Based on my knowledge,  the financial statements,  and other financial
          information  included in this quarterly report,  fairly present in all
          material respects the financial  condition,  results of operations and
          cash flows of the  company as of, and for,  the periods  presented  in
          this quarterly report;

     4.   The  company's  other  certifying  officer and I are  responsible  for
          establishing  and maintaining  disclosure  controls and procedures (as
          defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the company
          and we have:

          i.   designed such disclosure controls and procedures,  or caused such
               disclosure  controls  and  procedures  to be  designed  under our
               supervision,  to ensure that material information relating to the
               company, including its consolidated  subsidiaries,  is made known
               to us by others within those  entities,  particularly  during the
               period in which this quarterly report is being prepared;

          ii.  evaluated the effectiveness of the company's  disclosure controls
               and  procedures  and  presented  in  this  quarterly  report  our
               conclusions  about the  effectiveness of the disclosure  controls
               and  procedures,  as of the  end of the  period  covered  by this
               quarterly report based on our evaluation; and

          iii. disclosed in this  quarterly  report any change in the  company's
               internal control over financial reporting (as defined in Exchange
               Act Rules  13a-15(f)  and  15d-15(f))  that  occurred  during the
               company's   most  recent  fiscal   quarter  that  has  materially
               affected,  or is  reasonably  likely to  materially  affect,  the
               company's internal control over financial reporting; and

     5.   The company's other certifying officer and I have disclosed,  based on
          our  most  recent   evaluation  of  internal  control  over  financial
          reporting,  to the company's  auditors and the audit  committee of the
          company's board of directors:

          i.   all  significant  deficiencies  and  material  weaknesses  in the
               design or operation of internal control over financial  reporting
               which are  reasonably  likely to adversely  affect the  company's
               ability  to  record,  process,  summarize  and  report  financial
               information; and

          ii.  any fraud,  whether or not material,  that involves management or
               other  employees  who have a  significant  role in the  company's
               internal control over financial reporting.


/s/ Luke R. Corbett
--------------------------------

Luke R. Corbett
Chief Executive Officer
August 6, 2004


<PAGE>


                                                                    Exhibit 31.2
                                                                    ------------

                                  CERTIFICATION

I, Robert M. Wohleber, certify that:

     1.   I have  reviewed  this  quarterly  report on Form  10-Q of  Kerr-McGee
          Corporation (the "company");

     2.   Based on my  knowledge,  this  quarterly  report  does not contain any
          untrue  statement of a material  fact or omit to state a material fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this quarterly report;

     3.   Based on my knowledge,  the financial statements,  and other financial
          information  included in this quarterly report,  fairly present in all
          material respects the financial  condition,  results of operations and
          cash flows of the  company as of, and for,  the periods  presented  in
          this quarterly report;

     4.   The  company's  other  certifying  officer and I are  responsible  for
          establishing  and maintaining  disclosure  controls and procedures (as
          defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the company
          and we have:

          i.   designed such disclosure controls and procedures,  or caused such
               disclosure  controls  and  procedures  to be  designed  under our
               supervision,  to ensure that material information relating to the
               company, including its consolidated  subsidiaries,  is made known
               to us by others within those  entities,  particularly  during the
               period in which this quarterly report is being prepared;

          ii.  evaluated the effectiveness of the company's  disclosure controls
               and  procedures  and  presented  in  this  quarterly  report  our
               conclusions  about the  effectiveness of the disclosure  controls
               and  procedures,  as of the  end of the  period  covered  by this
               quarterly report based on our evaluation; and

          iii. disclosed in this  quarterly  report any change in the  company's
               internal control over financial reporting (as defined in Exchange
               Act Rules  13a-15(f)  and  15d-15(f))  that  occurred  during the
               company's   most  recent  fiscal   quarter  that  has  materially
               affected,  or is  reasonably  likely to  materially  affect,  the
               company's internal control over financial reporting; and

     5.   The company's other certifying officer and I have disclosed,  based on
          our  most  recent   evaluation  of  internal  control  over  financial
          reporting,  to the company's  auditors and the audit  committee of the
          company's board of directors:

          i.   all  significant  deficiencies  and  material  weaknesses  in the
               design or operation of internal control over financial  reporting
               which are  reasonably  likely to adversely  affect the  company's
               ability  to  record,  process,  summarize  and  report  financial
               information; and

          ii.  any fraud,  whether or not material,  that involves management or
               other  employees  who have a  significant  role in the  company's
               internal control over financial reporting.


/s/ Robert M. Wohleber
--------------------------------

Robert M. Wohleber
Chief Financial Officer
August 6, 2004