Harold Melvin Hyman (born July 24, 1924) is an historian of the American Civil War and the Reconstruction Era at Rice University. He is emeritus William P. Hobby professor at Rice. Hyman has a bachelor's degree from the University of California, Los Angeles (1948) and an M.A. (1950) and Ph.D. (1952) from Columbia University. During World War II Hyman served in the Marines as a gunner in the South Pacific.