| 1931 SANFL season | |
|---|---|
| Teams | 8 |
| Premiers | North Adelaide 6th premiership |
| Minor premiers | Port Adelaide 15th minor premiership |
| Magarey Medallist | Jack Sexton West Adelaide |
| Ken Farmer Medallist | Ken Farmer North Adelaide (126 Goals) |
| Matches played | 72 |
| Highest | 34,202 (Grand Final, Norwood vs. Sturt) |
The 1931 South Australian National Football League season was the 52nd season of the top-level Australian rules football competition in South Australia.