The 1987–88 I-Divisioona season was the 14th season of the I-Divisioona, the second level of Finnish ice hockey. 12 teams participated in the league, and HPK Hämeenlinna won the championship. HPK Hämeenlinna, SaiPa Lappeenranta, and Kiekko-Reipas Lahti qualified for the promotion/relegation round of the SM-liiga.
| Club | GP | W | T | L | GF–GA | Pts | ||
|---|---|---|---|---|---|---|---|---|
| 1. | 44 | 36 | 2 | 6 | 302:98 | 74 | ||
| 2. | 44 | 30 | 3 | 11 | 239:166 | 63 | ||
| 3. | 44 | 27 | 4 | 13 | 212:161 | 58 | ||
| 4. | 44 | 28 | 0 | 16 | 217:173 | 56 | ||
| 5. | 44 | 25 | 0 | 19 | 218:173 | 50 | ||
| 6. | 44 | 23 | 3 | 18 | 236:224 | 49 | ||
| 7. | 44 | 20 | 6 | 18 | 193:182 | 46 | ||
| 8. | 44 | 15 | 4 | 25 | 191:230 | 34 | ||
| 9. | 44 | 16 | 0 | 28 | 191:243 | 32 | ||
| 10. | 44 | 13 | 2 | 29 | 185:276 | 28 | ||
| 11. | 44 | 13 | 1 | 30 | 175:267 | 27 | ||
| 12. | 44 | 4 | 3 | 37 | 123:289 | 11 |