United States securities and exchange commission logo

                     September 12, 2022

       James A. J. Nickolas
       Senior Vice President and Chief Financial Officer
       Martin Marietta Materials Inc.
       2710 Wycliff Road
       Raleigh, North Carolina

                                                        Re: Martin Marietta
Materials Inc.
                                                            Form 10-K for the
Fiscal Year Ended December 31, 2021
                                                            Filed February 22,
                                                            File No. 001-12744

       Dear Mr. Nickolas:

              We have completed our review of your filing. We remind you that
the company and its
       management are responsible for the accuracy and adequacy of their
disclosures, notwithstanding
       any review, comments, action or absence of action by the staff.


                     Division of Corporation Finance

                     Office of Energy & Transportation