Leonard Wright Colby (August 5, 1846 – November 18, 1924), who hailed from the U.S. state of Ohio, was a leader of the first Nebraska National Guard, American Indian Wars veteran, state senator of Nebraska and United States Assistant Attorney General. As a teenager, he fought in the American Civil War. During his career, he commanded both Nebraska and U.S. troops. He served as commander of the Nebraska National Guard.