The 1985–86 I-Divisioona season was the 12th season of the I-Divisioona, the second level of Finnish ice hockey. 12 teams participated in the league, and KalPa Kuopio won the championship. KalPa Kuopio, TuToHockey, KooKoo, and HPK Hämeenlinna qualified for the promotion/relegation round of the SM-liiga.
| Club | GP | W | T | L | GF–GA | Pts | ||
|---|---|---|---|---|---|---|---|---|
| 1. | 44 | 37 | 1 | 6 | 276:136 | 75 | ||
| 2. | 44 | 31 | 5 | 8 | 221:147 | 67 | ||
| 3. | 44 | 30 | 3 | 11 | 231:153 | 63 | ||
| 4. | 44 | 26 | 1 | 17 | 229:193 | 53 | ||
| 5. | 44 | 22 | 2 | 20 | 214:199 | 46 | ||
| 6. | 44 | 21 | 1 | 22 | 246:227 | 43 | ||
| 7. | 44 | 19 | 3 | 22 | 169:171 | 41 | ||
| 8. | 44 | 18 | 1 | 25 | 228:256 | 37 | ||
| 9. | 44 | 13 | 5 | 26 | 175:220 | 31 | ||
| 10. | 44 | 14 | 1 | 29 | 185:252 | 29 | ||
| 11. | 44 | 12 | 3 | 29 | 173:245 | 27 | ||
| 12. | 44 | 7 | 2 | 35 | 155:299 | 16 |