The 1998–99 Illinois Fighting Illini men's basketball team represented the University of Illinois.

The Illini closed out the 1998-99 season with an amazing run at the Big Ten tournament title.

After entering the tournament as the 11th-seeded team, Illinois reeled off three straight victories over Top 25-ranked teams before losing in the championship game to second-ranked Michigan State.

Illini freshman Cory Bradford was the Big Ten's Freshman of the Year and was also selected to the All-Tournament team.

Roster