The 1990–91 SM-liiga season was the 16th season of the SM-liiga, the top level of ice hockey in Finland. 12 teams participated in the league, and TPS Turku won the championship.
| Rank | Club | GP | W | T | L | GF | GA | Diff | P | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 44 | 27 | 5 | 12 | 168 | 109 | +59 | 59 | ||
| 2. | 44 | 24 | 4 | 16 | 174 | 170 | +4 | 52 | ||
| 3. | 44 | 22 | 4 | 18 | 177 | 136 | +41 | 48 | ||
| 4. | 44 | 21 | 5 | 18 | 173 | 181 | -8 | 47 | ||
| 5. | 44 | 22 | 1 | 21 | 169 | 163 | +6 | 45 | ||
| 6. | 44 | 21 | 3 | 20 | 187 | 188 | -1 | 45 | ||
| 7. | 44 | 21 | 2 | 21 | 169 | 170 | -1 | 44 | ||
| 8. | 44 | 20 | 3 | 21 | 182 | 191 | -9 | 40 | ||
| 9. | 44 | 17 | 6 | 21 | 150 | 162 | -12 | 40 | ||
| 10. | 44 | 16 | 6 | 22 | 158 | 185 | -27 | 38 | ||
| 11. | 44 | 16 | 3 | 25 | 178 | 177 | +1 | 35 | ||
| 12. | 44 | 15 | 2 | 27 | 164 | 217 | -53 | 32 |