| Flexanville | |
| Commune Status: | Commune |
| Arrondissement: | Rambouillet |
| Canton: | Aubergenville |
| Insee: | 78236 |
| Postal Code: | 78910 |
| Mayor: | Didier Saussay[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 48.8547°N 1.7386°W |
| Elevation M: | 121 |
| Elevation Min M: | 95 |
| Elevation Max M: | 140 |
| Area Km2: | 8.89 |
Flexanville is a commune in the Yvelines department in the Île-de-France region of north-central France.
The commune shares its name with a small river that passes through it, la Flexanville. This waterway flows through eight other communes for a total distance of . The Flexanville is a tributary of the Vaucouleurs which in turn empties into the Seine.