Martin R. M. Wallace (September 29, 1829 – 1902) was an American Union brevet brigadier general during the period of the American Civil War. He was a colonel in the 4th Illinois Cavalry. He received his appointment as brevet brigadier general dated to March 13, 1865. He was the brother of the more famous Brigadier General William Hervey Lamme Wallace who was mortally wounded at the Battle of Shiloh.