Clair Armstrong Callan (March 29, 1920 – May 28, 2005) was an American Democratic Party politician. Born in Odell, Nebraska, the grandson of Irish immigrants, Callan graduated from Nebraska State Teachers College, now known as Peru State College. He served as an officer in the United States Navy during World War II on a destroyer in the Pacific Theater. He was a member of the United Methodist Church, a member of the American Legion, Veterans of Foreign Wars, the Freemasons, the Shriners, the Elks, the Odd Fellows and of the Optimist Club.