EXHIBIT 32.1

CERTIFICATION OF PERIODIC FINANCIAL REPORTS PURSUANT TO SECTION
906 OF THE SARBANES-OXLEY ACT OF 2002

To the best of their knowledge the undersigned hereby certify that the Annual Report on Form 10-K of RPC, Inc. for the period ended December 31, 2007, fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934 (15 U.S.C. Sec. 78m) and that the information contained in the Annual Report fairly presents, in all material respects, the financial condition and results of operations of RPC, Inc.

Date: March 4, 2008

/s/ Richard A. Hubbell
______________________________

Richard A. Hubbell

President and Chief Executive Officer

(Principal Executive Officer)

Date: March 4, 2008

/s/ Ben M. Palmer
______________________________

Ben M. Palmer

Vice President, Chief Financial Officer and Treasurer

(Principal Financial and Accounting Officer)