The 1983–84 I-Divisioona season was the tenth season of the I-Divisioona, the second level of Finnish ice hockey. 10 teams participated in the league, and Lukko Rauma won the championship. Lukko Rauma and JYP Jyväskylä qualified for the promotion/relegation round of the SM-liiga.
| Club | GP | W | T | L | GF–GA | Pts | ||
|---|---|---|---|---|---|---|---|---|
| 1. | 36 | 27 | 2 | 7 | 187:117 | 56 | ||
| 2. | 36 | 26 | 3 | 7 | 213:94 | 55 | ||
| 3. | 36 | 24 | 4 | 8 | 212:135 | 52 | ||
| 4. | 36 | 14 | 8 | 14 | 140:154 | 36 | ||
| 5. | 36 | 15 | 4 | 17 | 140:134 | 34 | ||
| 6. | 36 | 16 | 1 | 19 | 155:174 | 33 | ||
| 7. | 36 | 14 | 2 | 20 | 134:175 | 30 | ||
| 8. | 36 | 12 | 1 | 23 | 150:209 | 25 | ||
| 9. | 36 | 9 | 3 | 24 | 138:179 | 21 | ||
| 10. | 36 | 9 | 0 | 27 | 148:246 | 18 |