The Illinois Fighting Illini men's basketball team is an NCAA Division I college basketball team competing in the Big Ten Conference.

Home games are played at the State Farm Center, located on the University of Illinois Urbana-Champaign's campus in Champaign.

Illinois has one pre-tournament national championship and one non-NCAA  tournament national championship in 1915 and 1943, awarded by the Premo-Porretta Power Poll

Illinois has appeared in the NCAA Division I Men's Basketball Tournament 31 times, and has competed in 5 Final Fours, 9 Elite Eights, and has won 17 Big Ten regular season championships.

The team is currently coached by Brad Underwood, who was hired on March 18, 2017.

Through the end of the 2017–18 season, Illinois ranks 12th all-time in winning percentage and 15th all-time in wins among all NCAA Division I men's college basketball programs.