The 1984 NAIA Division II football season, as part of the 1984 college football season in the United States and the 29th season of college football sponsored by the NAIA, was the 15th season of play of the NAIA's lower division for football. The season was played from August to November 1984 and culminated in the 1984 NAIA Division II Football National Championship, played at Maxwell Field on the campus of Linfield College in McMinnville, Oregon. Linfield defeated Northwestern (IA), the defending national champions, in the championship game, 33–22, to win their second NAIA national title.