The 2020 Illinois State Redbirds football team represented Illinois State University as a member of the Missouri Valley Football Conference (MVFC) during the 2020–21 NCAA Division I FCS football season. Led by 12th-year head coach Brock Spack, the Redbirds compiled an overall record of 1–3 with an identical in conference play, tying for seventh place in the MVFC. Illinois State played home games at Hancock Stadium in Normal, Illinois.