William Craig Cooper (December 18, 1832 – August 29, 1902) was a U.S. Representative from Ohio. Born in Mount Vernon, Ohio, Cooper attended the public schools and Mount Vernon Academy.He studied law.He was admitted to the bar in 1852 and commenced practice in Mount Vernon, Ohio.He served as prosecuting attorney of Knox County 1859-1863.He served as mayor of Mount Vernon 1862-1864. During the American Civil War, Cooper was colonel of the 142nd Ohio Infantry, a 100 days regiment.He served as a member of the State house of representatives 1872-1874.He served as judge advocate general of Ohio 1879-1884.He served as member and president of the board of education of Mount Vernon.