The 2018–19 Western Illinois Leathernecks men's basketball team represented Western Illinois University during the 2018–19 NCAA Division I men's basketball season.

The Leathernecks, led by fifth-year head coach Billy Wright, played their home games at Western Hall in Macomb, Illinois as members of the Summit League.

They beat top-seeded South Dakota State in the quarterfinals of the Summit League tournament, before losing to North Dakota State in the semifinals.

They lost in the quarterfinals of the Summit League tournament to South Dakota.

Roster Last update: October 31, 2018 Source[2]