1998 MAC men's basketball tournament

The 1998 MAC men's basketball tournament, a part of the 1997–98 NCAA Division I men's basketball season, took place at campus sites for the quarterfinal round with the semifinals and final held at SeaGate Centre in Toledo, Ohio. Its winner received the Mid-American Conference's automatic bid to the 1998 NCAA tournament. It was a single-elimination tournament with three rounds and the top eight MAC teams invited to participate. No teams received byes in the tournament. Ball State, the MAC West Division co-champion, received the number one seed in the tournament.

Seeds

 * 1) Ball State
 * 2) Western Michigan
 * 3) Akron
 * 4) Eastern Michigan
 * 5) Toledo
 * 6) Kent State
 * 7) Miami
 * 8) Marshall

Bracket
* Overtime period