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 5, 2003


<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 5, 2003