The 2005 MAC men's basketball tournament, a part of the 2004-05 NCAA Division I men's basketball season, took place from March 7–12 at Gund Arena in Cleveland.
Its winner received the Mid-American Conference's automatic bid to the 2005 NCAA tournament.
Miami, the MAC regular season winner, received the number one seed in the tournament.
Fourth-seeded Ohio beat Miami in the semi-finals and defeated second-seeded Buffalo in overtime in the final.
[3] Leon Williams of Ohio was named the tournament MVP.