| Sailly | |
| Commune Status: | Commune |
| Arrondissement: | Mantes-la-Jolie |
| Canton: | Limay |
| Insee: | 78536 |
| Postal Code: | 78440 |
| Mayor: | Gérard Béguin[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CU Grand Paris Seine et Oise |
| Coordinates: | 49.0408°N 1.8008°W |
| Elevation M: | 120 |
| Elevation Min M: | 81 |
| Elevation Max M: | 174 |
| Area Km2: | 5.45 |
Sailly (in French pronounced as /saji/) is a commune in the Yvelines department in the Île-de-France region in north-central France.