The 2003 MAC men's basketball tournament, a part of the 2002–03 NCAA Division I men's basketball season, took place from March 10–15 at Gund Arena in Cleveland.
Its winner received the Mid-American Conference's automatic bid to the 2003 NCAA tournament.
Central Michigan, the MAC regular season winner, received the number one seed in the tournament.
Central Michigan defeated Kent State in the final.
[1] In the NCAA tournament they defeated Creighton in the first round before losing to Duke.