| Osmoy | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Osmoy (Yvelines).svg |
| Arrondissement: | Mantes-la-Jolie |
| Canton: | Bonnières-sur-Seine |
| Insee: | 78475 |
| Postal Code: | 78910 |
| Mayor: | Jérôme Durand[1] |
| Term: | 2022 - 2026 |
| Intercommunality: | Pays houdanais |
| Coordinates: | 48.8639°N 1.7169°W |
| Elevation M: | 108 |
| Elevation Min M: | 93 |
| Elevation Max M: | 128 |
| Area Km2: | 2.59 |
Osmoy is a commune in the Yvelines department in the Île-de-France region in north-central France.