| Competition: | sanfl |
| Year: | 1956 |
| Teams: | 10 |
| Count: | 17 |
| Mpcount: | 26 |
| Matches: | 76 |
| Attendance: | 765727 |
| Highattend: | 45,514 (Grand Final, vs.) |
| Top Goal Scorer: | Rex Johns (70 Goals) |
| Magarey Medal: | Dave Boyd |
| Prevseason: | 1955 |
| Nextseason: | 1957 |
The 1956 South Australian National Football League season was the 77th season of the top-level Australian rules football competition in South Australia.