| Competition: | sanfl |
| Year: | 1973 |
| Teams: | 10 |
| Count: | 2 |
| Mpcount: | 2 |
| Matches: | 111 |
| Attendance: | 1131287 |
| Highattend: | 56,525 (Grand Final, vs.) |
| Top Goal Scorer: | Ken Whelan (107 Goals) |
| Magarey Medal: | Barrie Robran |
| Prevseason: | 1972 |
| Nextseason: | 1974 |
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.
See main article: 1973 SANFL Grand Final.