| Year: | 2003 |
| Conference: | MAC |
| Gender: | Men's |
| Teams: | 13 |
| Arena: | Gund Arena |
| City: | Cleveland, Ohio |
| Champions: | Central Michigan |
| Titlecount: | 2nd |
| Coach: | Jay Smith |
| Coachcount: | 1st |
| Mvp: | Chris Kaman |
| Mvpteam: | Central Michigan |
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. It was a single-elimination tournament with four rounds and the three highest seeds received byes in the first round. All MAC teams were invited to participate. 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.[2] [3]