EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

BOK Financial 401(k) Plan

Tulsa, Oklahoma

We consent to the incorporation by reference in Registration Statements identified below on Form S-8 of BOK Financial 401(k) Plan of our report dated June 22, 2017, relating to our audit of the financial statements and supplemental schedule of the BOK Financial 401(k) Plan, which appears in this Annual Report on Form 11-K of the BOK Financial 401(k) Plan for the year ended December 31, 2016.

• Registration Statement (Form S-8, No. 33-44121) pertaining to the Reoffer Prospectus of the Bank of Oklahoma Master Thrift Plan and Trust Agreement.

• Registration Statement (Form S-8, No. 33-79836) pertaining to the Reoffer Prospectus of the BOK Financial Corporation Directors' Stock Compensation Plan.

• Registration Statement (Form S-8, No. 333-32649) pertaining to the Reoffer Prospectus of the BOK Financial Corporation 1997 Stock Option Plan.

• Registration Statement (Form S-8, No. 333-93957) pertaining to the Reoffer Prospectus of the BOK Financial Corporation 2000 Stock Option Plan.

• Registration Statement (Form S-8, No. 333-40280) pertaining to the Reoffer Prospectus of the BOK Financial Corporation Master Thrift Plan for Hourly Employees.

• Registration Statement (Form S-8, No. 333-62578) pertaining to the Reoffer Prospectus of the BOK Financial Corporation 2001 Stock Option Plan.

• Registration Statement (Form S-8, No. 333-106530) pertaining to the Reoffer Prospectus of the BOK Financial Corporation 2003 Executive Incentive Plan.

• Registration Statement (Form S-8, No. 333-106531) pertaining to the Reoffer Prospectus of the BOK Financial Corporation 2003 Stock Option Plan.

• Registration Statement (Form S-8, No. 333-135224) pertaining to the Reoffer Prospectus of the BOK Financial Corporation 2003 Stock Option Plan.

• Registration Statement (Form S-8, No. 333-158846) pertaining to Reoffer Prospectus of the BOK Financial Corporation 2009 Omnibus Incentive Plan.

• Registration Statement (Form S-8, No. 333-212120) pertaining to Reoffer Prospectus of the BOK Financial Corporation 2016 Subordinated Note Issuance.

/s/ HoganTaylor LLP

June 22, 2017

Tulsa, Oklahoma