| Montboissier | |
| Commune Status: | Commune |
| Arrondissement: | Châteaudun |
| Canton: | Châteaudun |
| Insee: | 28259 |
| Postal Code: | 28800 |
| Mayor: | Bruno Lhoste[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Bonnevalais |
| Coordinates: | 48.2217°N 1.3936°W |
| Elevation M: | 137 |
| Elevation Min M: | 121 |
| Elevation Max M: | 144 |
| Area Km2: | 13.94 |
Montboissier (in French pronounced as /mɔ̃bwasje/) is a commune in the Eure-et-Loir department in northern France.