Exhibit 23
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in the Registration Statement of ONEOK, Inc., on Form S-8 (File Nos. 333-41263, 333-140629, 333-152748, 333-157548, 333-165044, 333-171308, 333-178622, 333-185633 and 333-194284) of our report dated June 16, 2017, on our audits of the financial statements and supplemental schedule of the ONEOK, Inc. 401(k) Plan as of December 31, 2016 and 2015, and for the year ended December 31, 2016, which report is included in this Annual Report on Form 11-K.
/s/ BKD LLP
Tulsa, Oklahoma
June 16, 2017