Charles Winnans Cox (July 7, 1882 - March 28, 1958) was a politician and timber contractor in Ontario, Canada. He was a Liberal member of the Legislative Assembly of Ontario representing the riding of Port Arthur from 1934 to 1943 and the riding of Fort William from 1948 to 1951. He was a member of Mitchell Hepburn's cabinet from 1936 to 1937. He also served as mayor of Port Arthur, Ontario from 1934 to 1948 and again in 1952.