| Competition: | sanfl |
| Year: | 1998 |
| Teams: | 9 |
| Count: | 35 |
| Mpcount: | 9 |
| Matches: | 96 |
| Highattend: | 44,838 (Grand Final, vs.) |
| Top Goal Scorer: | Adam Richardson (100 Goals) |
| Magarey Medal: | Andrew Osborn (16 votes) |
| Prevseason: | 1997 |
| Nextseason: | 1999 |
The 1998 South Australian National Football League season was the 119th season of the top-level Australian rules football competition in South Australia.