| 2009–10 Ligue Magnus | |
|---|---|
| League | Ligue Magnus |
| Sport | Ice hockey |
| Duration | 26 games |
| Number of teams | 14 |
| Regular-season winner | Dragons de Rouen |
| Playoffs winner | Dragons de Rouen |
| Promoted to Division 1 | Drakkars de Caen |
| Relegated to Division 1 | Bisons de Neuilly-sur-Marne |
The 2009–10 Ligue Magnus season was the 89th regular season of the ice hockey elite league in France and the sixth season of the Ligue Magnus.