2023–24 Western Illinois Leathernecks men's basketball team

The 2023–24 Western Illinois Leathernecks men's basketball team represents Western Illinois University during the 2023–24 NCAA Division I men's basketball season. The Leathernecks, led by first-year head coach Chad Boudreau, play their home games at Western Hall in Macomb, Illinois as first-year members of the Ohio Valley Conference.

Previous season
The Leathernecks finished the 2022–23 season 16–14, 9–9 in Summit League play to finish in a tie for fourth place. They were defeated by St. Thomas in the quarterfinals of the Summit League tournament. This was the Leathernecks' final season as a member of the Summit League, as they moved to the Ohio Valley Conference for the 2023–24 season.

On April 7, 2023, it was announced that head coach Rob Jeter would be leaving the school to take the head coaching position at Southern Utah. After being named interim head coach immediately following Jeter's departure, Chad Boudreau was named the team's permanent head coach on April 13.

Schedule and results
!colspan=12 style=| Non-conference regular season

!colspan=12 style=| Ohio Valley Conference regular season

!colspan=9 style=| Ohio Valley tournament



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