| Sagy | |
| Commune Status: | Commune |
| Insee: | 71379 |
| Postal Code: | 71580 |
| Arrondissement: | Louhans |
| Canton: | Louhans |
| Coordinates: | 46.6019°N 5.3094°W |
| Elevation M: | 211 |
| Elevation Min M: | 182 |
| Elevation Max M: | 218 |
| Area Km2: | 34.21 |
Sagy (in French pronounced as /saʒi/) is a commune in the Saône-et-Loire department in the region of Bourgogne-Franche-Comté in eastern France.
The Vallière flows westward through the middle of the commune.