| Gambaiseuil | |
| Commune Status: | Commune |
| Arrondissement: | Rambouillet |
| Canton: | Rambouillet |
| Insee: | 78264 |
| Postal Code: | 78490 |
| Mayor: | Claude Cazaneuve[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Rambouillet Territoires |
| Coordinates: | 48.7575°N 1.7331°W |
| Elevation M: | 129 |
| Elevation Min M: | 109 |
| Elevation Max M: | 184 |
| Area Km2: | 18.92 |
Gambaiseuil (in French pronounced as /ɡɑ̃bɛzœj/) is a commune in the Yvelines department in the Île-de-France region in north-central France.