Western Illinois Leathernecks men's basketball

The Western Illinois Leathernecks men's basketball team represents Western Illinois University of Macomb, Illinois, in National Collegiate Athletic Association (NCAA) Division I men's college basketball competition. As of the 2023–24 NCAA season, the Leathernecks compete in the Ohio Valley Conference.

Western Illinois' first men's basketball team was fielded in 1904. The Leathernecks men's basketball program made the transition from Division II to Division I beginning in the 1981–82 season. They were selected to play in the College Basketball Invitational tournament following the 2011–12 regular season, the first Division I postseason appearance in school history. The Leathernecks were selected again to play in the College Basketball Invitational tournament after the 2012–13 season. The Leathernecks have never appeared in the NCAA Division I men's basketball tournament.

Season Results
Western Illinois' records season by season since joining Division I in 1981.

Coaching history
Stats updated as of the end of the 2022–23 season

CBI results
The Leathernecks have appeared in two College Basketball Invitationals. Their combined record is 0–2.

The Basketball Classic results
The Leathernecks have appeared in The Basketball Classic one time. Their record is 0–1.

NCAA Division II Tournament results
The Leathernecks have appeared in three NCAA Division II Tournaments. Their combined record is 2–4.

NAIA tournament results
The Leathernecks have appeared in seven NAIA tournaments. Their combined record is 18–7.

Notable former players

 * Eulis Báez, Overseas
 * Ceola Clark III, Overseas
 * Joe Dykstra, drafted by the Phoenix Suns
 * Obi Emegano, Overseas
 * Brandon Gilbeck, Overseas
 * Kristjan Makke, Overseas
 * Mike Miklusak, Overseas
 * Al Miksis, National Basketball Association
 * Terell Parks, basketball player in the Israeli Basketball Premier League