| La Bosse-de-Bretagne | |
| Native Name: | (Gallo) |
| Commune Status: | Commune |
| Coordinates: | 47.87°N -1.5975°W |
| Insee: | 35030 |
| Postal Code: | 35320 |
| Arrondissement: | Redon |
| Canton: | Bain-de-Bretagne |
| Mayor: | Jean-Charles Hamon[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Bretagne Porte de Loire |
| Elevation Min M: | 22 |
| Elevation Max M: | 106 |
| Area Km2: | 10.21 |
La Bosse-de-Bretagne (pronounced as /fr/; ; Gallo: La Bocz) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.
The river Semnon forms most of the commune's southern border.
Inhabitants of La Bosse-de-Bretagne are called Bosséens in French.