The 1984 Northern Illinois Huskies football team represented Northern Illinois University as a member of the Mid-American Conference (MAC) during the 1984 NCAA Division I-A football season. Led by Lee Corso in his first and only season as head coach, the Huskies compiled an overall record of 4–6–1 with a mark of 3–5–1 in conference play, placing fifth in the MAC. Northern Illinois played home games at Huskie Stadium in DeKalb, Illinois.