| 1940 SANFL season | |
|---|---|
| Teams | 8 |
| Premiers | Sturt 5th premiership |
| Minor premiers | Port Adelaide 20th minor premiership |
| Magarey Medallist | Mel Brock Glenelg |
| Ken Farmer Medallist | Ken Farmer North Adelaide (125 Goals) |
| Matches played | 72 |
| Highest | 28,500 (Grand Final, Sturt vs. South Adelaide) |
The 1940 South Australian National Football League season was the 61st season of the top-level Australian rules football competition in South Australia.