The 1973 NAIA Division II football season was the 18th season of
college football sponsored by the
NAIA and the fourth season of play of the NAIA's lower division for football.
The
Northwestern Red Raiders defeated the
Glenville State Pioneers in the championship game, 10–3, to win their first NAIA national title. As of 2015, this is the earliest NAIA championship won by a team that remains at the NAIA level.