The 1999 MAC men's basketball tournament, a part of the 1998–99 NCAA Division I men's basketball season, took place at SeaGate Centre in Toledo, Ohio.
It was a single-elimination tournament with three rounds and included only the top eight conference teams.
Miami, the MAC regular season winner, received the number one seed in the tournament.
Miami was selected as an at-large entry for the NCAA Tournament.
Through the 2016–17 season, it is the most recent time the MAC has had more than one team participate in the NCAA Tournament.