Clarence Edward "Mac" McKnight Jr. (9 September 1929 – 29 July 2022) was a lieutenant general in the United States Army whose assignments included Director of the Command, Control and Communications Systems Organization of the Joint Chiefs of Staff; deputy commandant and commandant of the Signal Training Centre and commanding general of Fort Gordon. He graduated from the United States Military Academy in 1952 with a B.S. degree in engineering. He later earned an M.S.E. degree in electrical engineering from the University of Michigan in 1961.