| Competition: | sanfl |
| Year: | 1966 |
| Teams: | 10 |
| Count: | 6 |
| Mpcount: | 5 |
| Matches: | 104 |
| Attendance: | 1017191 |
| Highattend: | 59,417 (Grand Final, vs.) |
| Top Goal Scorer: | Eric Freeman (81 Goals) |
| Magarey Medal: | Ron Kneebone |
| Prevseason: | 1965 |
| Nextseason: | 1967 |
The 1966 South Australian National Football League season was the 87th season of the top-level Australian rules football competition in South Australia.
See main article: 1966 SANFL Grand Final.