| Sacy | |
| Coordinates: | 47.6683°N 3.8208°W |
| Insee: | 89330 |
| Postal Code: | 89270 |
| Arrondissement: | Auxerre |
| Canton: | Joux-la-Ville |
| Commune: | Vermenton |
| Elevation Min M: | 137 |
| Elevation Max M: | 284 |
| Area Km2: | 27.70 |
| Population: | 168 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Sacy (in French pronounced as /sasi/) is a former commune in the Yonne department in Bourgogne-Franche-Comté in north-central France. On 1 January 2016, it was merged into the commune of Vermenton.[2]