Mark Reeves Bacon (February 29, 1852 – August 20, 1941) was a lawyer and politician from the U.S. state of Michigan.

Bacon was born in Phillipstown, Illinois, and attended the public schools there.

He studied law, was admitted to the bar on July 4, 1876, and commenced practice in Fairfield, Illinois.

Bacon presented credentials as a Republican Member-elect from Michigan's 2nd congressional district to the United States House of Representatives for the Sixty-fifth Congress.

He served from March 4 until December 13, 1917, when he was succeeded by Democrat Samuel W. Beakes, who successfully contested the election.