The 1973 South Australian National Football League season was the 94th season of the top-level Australian rules football competition in South Australia.
After a 39 year absence of any silverware, Glenelg were the dominant team of the season, recording only a single loss to North Adelaide in Round 7.
They stormed home to a narrow grand final victory against the same club after Graham Cornes kicked a famous goal late in the game.
The season was more famous for the disappearance of two children from a game between Norwood and North Adelaide.
This Australian rules football competition-related article is a stub.