UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) June 6, 2005

BANCFIRST CORPORATION

(Exact name of registrant as specified in its charter)

OKLAHOMA	0-14384	73-1221379
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

101 North Broadway, Oklahoma City, Oklahoma	73102
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code (405) 270-1086

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 4.01 Changes in Registrant’s Certifying Accountants

At a meeting held on May 26, 2005, the audit committee of the Board of Directors of BancFirst Corporation (the “Company”) dismissed the firm of Ernst & Young LLP (E&Y) as auditors of the Company effective May 31, 2005 for the year ending December 31, 2005.

E&Y’s reports on the Company’s consolidated financial statements for the years ended December 31, 2004 and 2003 did not contain any adverse opinion or a disclaimer of opinion, nor were such reports qualified or modified as to uncertainty, audit scope or accounting principles.

During the years ended December 31, 2004 and 2003 and through the subsequent interim period, there have been no disagreements with E&Y regarding any matters of accounting principles or practices, financial statement disclosure, or auditing scope and procedures which, if not resolved to the satisfaction of E&Y, would have caused E&Y to make reference to the matter in their report. The Company has requested E&Y to furnish it a letter addressed to the Commission stating whether it agrees with the above statements. A copy of that letter dated June 6, 2005 is filed as Exhibit 16.1 to this Form 8-K.

ITEM 9.01	FINANCIAL STATEMENTS AND EXHIBITS
(c)	Exhibits
Exhibit No.	Description
16.1	Letter from Ernst & Young LLP

SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

		BANCFIRST CORPORATION
			(Registrant)
Date:	June 6, 2005	/s/    Joe T. Shockley, Jr.
			(Signature)
		Joe T. Shockley, Jr. Executive Vice President Chief Financial Officer