 2004–05 Illinois Fighting Illini men's basketball team

The 2004–05 Illinois Fighting Illini men's basketball team, the 100th season of men's basketball at the University of Illinois at Urbana–Champaign, enjoyed one of the most successful seasons in recent college history.After starting the regular season with a record of 29–0 and winning the Big Ten Conference regular season title outright at 15–1, the Illini were Big Ten Tournament champions.