| Les Alluets-le-Roi | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Les Alluets-le-Roi (Yvelines).svg |
| Arrondissement: | Saint-Germain-en-Laye |
| Canton: | Verneuil-sur-Seine |
| Insee: | 78010 |
| Postal Code: | 78580 |
| Mayor: | Véronique Houllier[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CU Grand Paris Seine et Oise |
| Coordinates: | 48.915°N 1.92°W |
| Elevation M: | 180 |
| Elevation Min M: | 150 |
| Elevation Max M: | 187 |
| Area Km2: | 7.39 |
Les Alluets-le-Roi (in French pronounced as /le.z‿alɥɛ lə ʁwa/) is a commune in the Yvelines department in northern France.