The 2008–09 Western Michigan Broncos men's basketball team was a National Collegiate Athletic Association Division I college basketball team representing Western Michigan University.

The team was the defending Mid-American Conference (MAC) West Division champion and was picked to finish first in the MAC West Division by members of the MAC News Media Association.

[1] WMU opened the season losing to Texas Christian in the first game of the inaugural Charleston Classic.

In February 2009, redshirt freshman Justin Hairston decided to transfer.

[2]