Henry Martyn Cist (February 20, 1839 – December 16, 1902) was an American soldier, lawyer, and author who was a Union Army captain and staff officer during the American Civil War. On December 11, 1866 he was nominated and on February 6, 1867 he was confirmed for appointment to the grade of brevet brigadier general of volunteers, to rank from March 13, 1865. He is most noted for his classic and oft-referenced 1882 book The Army of the Cumberland. In addition, Cist led pioneering efforts to preserve and interpret the sites of the battles of Chickamauga and Chattanooga.