The 1973 NAIA Division I football season was the 18th season of college football sponsored by the NAIA and the fourth season of the league's two-division structure.
This was the final season for the Oklahoma Collegiate Conference. After sixty-five season of football dating back to 1929, the OCC disbanded after the end of play, with six of its members subsequently departing to form the Oklahoma Intercollegiate Conference for the 1974 season.