The 1988–89 1. Slovenská národná hokejová liga season was the 20th season of the 1. Slovenská národná hokejová liga, the second level of ice hockey in Czechoslovakia alongside the 1. Česká národní hokejová liga. 12 teams participated in the league, and Partizán Liptovský Mikuláš won the championship. ZŤS Martin and ZVL Skalica were relegated.
| Club | GP | W | T | L | Goals | Pts | ||
|---|---|---|---|---|---|---|---|---|
| 1. | Partizán Liptovský Mikuláš | 44 | 29 | 8 | 7 | 186:124 | 66 | |
| 2. | Plastika Nitra | 44 | 30 | 3 | 11 | 208:144 | 63 | |
| 3. | Spartak ZŤS Dubnica nad Váhom | 44 | 29 | 4 | 11 | 189:115 | 62 | |
| 4. | VTJ Topoľčany | 44 | 22 | 9 | 13 | 177:141 | 53 | |
| 5. | PS Poprad | 44 | 19 | 9 | 16 | 189:162 | 47 | |
| 6. | VTJ Michalovce | 44 | 19 | 9 | 16 | 160:142 | 47 | |
| 7. | ZPA Prešov | 44 | 20 | 3 | 21 | 169:185 | 43 | |
| 8. | Iskra Smrečina Banská Bystrica | 44 | 16 | 7 | 21 | 145:167 | 39 | |
| 9. | ZTK Zvolen | 44 | 12 | 11 | 21 | 154:152 | 35 | |
| 10. | Slávia Ekonóm Bratislava | 44 | 14 | 6 | 24 | 174:232 | 34 | |
| 11. | ZŤS Martin | 44 | 13 | 6 | 25 | 152:191 | 32 | |
| 12. | ZVL Skalica | 44 | 2 | 3 | 39 | 97:245 | 7 |