Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our reports dated February 28, 2020, with respect to the consolidated financial statements and internal control over financial reporting included in the Annual Report of RPC, Inc. on Form 10-K for the year ended December 31, 2019. We consent to the incorporation by reference of said reports in the Registration Statements of RPC, Inc. on Forms S-8 (File No. 333-40223, File No 333-117836 and File No. 333-195424).

/s/ GRANT THORNTON LLP

Atlanta, Georgia

February 28, 2020