1959 Western Illinois Leathernecks football team

The 1959 Western Illinois Leathernecks football team represented Western Illinois University as a member of the Interstate Intercollegiate Athletic Conference (IIAC) during the 1959 NCAA College Division football season. They were led by third-year head coach Lou Saban and played their home games at Hanson Field. The Leathernecks finished the season with a perfect 9–0 record overall and a 6–0 record in conference play, winning the IIAC title. Despite its record, the team was unable to participate in a postseason bowl game, as the Illinois state teachers college board banned its schools from participating in postseason sporting events.