| Prevseason: | 2007–08 |
| Nextseason: | 2009–10 |
| Basketball League Belgium Division I | |
| Season: | 2008–09 |
| Champions: | Spirou Charleroi (8th title) |
| Runners Up: | Dexia Mons-Hainaut |
| Teams: | 9 |
| Mvp Link: | Basketball League Belgium Division I MVP |
| Mvp N: | USA |
| Ppg: | 18.3 |
| Ppg N: | USA |
| Rpg: | 9.4 |
| Rpg N: | USA |
| Apg: | 5.0 |
| Apg N: | USA |
The 2008–09 Basketball League Belgium Division I, for sponsorship reasons named 2008–09 Ethias League, was the 81st season of the Basketball League Belgium, the highest professional basketball league in Belgium. Spirou Charleroi won the 2009 national title, their second straight and eight total title.[1]