The 2025 Illinois Fighting Illini football team represented the University of Illinois Urbana-Champaign as a member of the Big Ten Conference during the 2025 NCAA Division I FBS football season. Led by fifth-year head coach Bret Bielema, the Fighting Illini played home games at Gies Memorial Stadium (renamed from "Memorial Stadium" shortly after the start of the 2025 season) in Champaign, Illinois.
The Illinois Fighting Illini recorded the highest average home attendance among football teams in the state of Illinois, with 58,350 spectators per game. The Chicago Bears recorded a slightly lower average with 58,282.