| Saint-Chamassy | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Chamassy (Dordogne).svg |
| Arrondissement: | Sarlat-la-Canéda |
| Canton: | Vallée de l'Homme |
| Insee: | 24388 |
| Postal Code: | 24260 |
| Mayor: | Roland Delmas[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Vallée de l'Homme |
| Coordinates: | 44.8736°N 0.9283°W |
| Elevation M: | 175 |
| Elevation Min M: | 45 |
| Elevation Max M: | 220 |
| Area Km2: | 15.6 |
Saint-Chamassy (in French pronounced as /sɛ̃ ʃamasi/; Occitan (post 1500);: Sench Amaci) is a commune in the Dordogne department in Nouvelle-Aquitaine in southwestern France.