23.1

            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the Registration Statement (Form
S-8 No. 0-19341) pertaining to the 2009 Omnibus Incentive Plan of BOK Financial
Corporation of our reports dated February 26, 2009, with respect to the
consolidated financial statements of BOK Financial Corporation included in its
Annual Report (Form 10-K) for the year ended December 31, 2008, and the
effectiveness of internal control over financial reporting of BOK Financial
Corporation filed with the Securities and Exchange Commission.

                                              /s/ ERNST & YOUNG LLP


Tulsa, Oklahoma
April 27, 2009