The 1990 Illinois Fighting Illini football team was an American football team that represented the University of Illinois at Urbana-Champaign as a member of the Big Ten Conference during the 1990 NCAA Division I-A football season. In their third year under head coach John Mackovic, the Illini compiled an 8–4 record, finished in a four-way tie for first place in the Big Ten, and outscored opponents by a total of 293 to 216. They concluded the season in the 1991 Hall of Fame Bowl, losing to Clemson. Ranked No. 16 in the AP poll at the end of the regular season, they dropped to No. 25 in the final poll issued after the bowl games.