The 2003 Oklahoma Sooners football team represented the University of Oklahoma in the 2003 NCAA Division I-A football season, the 109th season of Sooner football. The team was led by two-time Walter Camp Coach of the Year Award winner (winning his second one that season), Bob Stoops, in his fifth season as head coach. They played their home games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma. They were a charter member of the Big 12 Conference.