Consent of Independent Registered Public Accounting Firm

EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements and related prospectuses:

(1)	Kerr-McGee Performance Share Plan Kerr-McGee Corporation Executive Deferred Compensation Plan	Form S-8	File No. 333-66436

(2)	Oryx Energy Company 1997 Long Term Incentive Plan Oryx Energy Company Executive Variable Incentive Plan Oryx Energy Company Equity and Deferred Compensation Plan for Non-Employee Directors	Form S-8	File No. 333-66438

(3)	Kerr-McGee Corporation Savings Investment Plan Kerr-McGee Corporation Employee Stock Ownership Plan HS Resources, Inc. Employee Investment 401(k) and Profit Sharing Plan	Form S-8	File No. 333-66440

(4)	Kerr-McGee Corporation Long Term Incentive Program Kerr-McGee Corporation 1998 Long Term Incentive Plan Kerr-McGee Corporation 2000 Long Term Incentive Plan	Form S-8	File No. 333-66442

(5)	Kerr-McGee Corporation 2002 Long Term Incentive Plan	Form S-8	File No. 333-89558

(6)	Oryx Energy Company 1997 Long Term Incentive Plan Oryx Energy Company Executive Variable Incentive Plan Oryx Energy Company Equity and Deferred Compensation Plan for Non-Employee Directors	Form S-8	File No. 333-41008

(7)	Kerr-McGee Corporation 2000 Long Term Incentive Plan	Form S-8	File No. 333-41006

(8)	Kerr-McGee Corporation Executive Deferred Compensation Plan	Form S-8	File No. 333-41000

(9)	Kerr-McGee Corporation 1998 Long Term Incentive Plan	Form S-8	File No. 333-39222

(10)	Kerr-McGee Corporation Performance Share Plan	Form S-8	File No. 333-92865

(11)	Kerr-McGee Corporation Long Term Incentive Program	Form S-8	File No. 333-05999

(12)	Kerr-McGee Corporation Long Term Incentive Program	Form S-8	File No. 33-50949

(13)	Kerr-McGee Corporation Long Term Incentive Program	Form S-8	File No. 33-24274

(14)	Kerr-McGee Corporation	Form S-8	File No. 333-116950

(15)	Kerr-McGee Corporation	Form S-3	File No. 333-81720

(16)	Kerr-McGee Corporation Kerr-McGee Operating Corporation HS Resources, Inc.	Form S-3	File No. 333-68136

(17)	Kerr-McGee Corporation	Form S-3	File No. 333-115935

of our reports dated March 11, 2005, with respect to the consolidated financial statements and schedule of Kerr-McGee Corporation, Kerr-McGee Corporation management’s assessment of the effectiveness of internal control over financial reporting, and the effectiveness of internal control over financial reporting of Kerr-McGee Corporation included in this Annual Report (Form 10-K) for the year ended December 31, 2004.

/s/ ERNST & YOUNG LLP

Oklahoma City, Oklahoma

March 11, 2005