| Montalet-le-Bois | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Montalet-le-Bois (Yvelines).svg |
| Arrondissement: | Mantes-la-Jolie |
| Canton: | Limay |
| Insee: | 78416 |
| Postal Code: | 78440 |
| Mayor: | Maël Wotin[1] |
| Term: | 2021 - 2026 |
| Intercommunality: | CU Grand Paris Seine et Oise |
| Coordinates: | 49.0472°N 1.8267°W |
| Elevation M: | 128 |
| Elevation Min M: | 66 |
| Elevation Max M: | 180 |
| Area Km2: | 3.01 |
Montalet-le-Bois (in French pronounced as /mɔ̃talɛ lə bwa/) is a commune in the Yvelines department in the Île-de-France region in north-central France.