| Frémainville | |
| Commune Status: | Commune |
| Coordinates: | 49.0664°N 1.8675°W |
| Arrondissement: | Pontoise |
| Canton: | Vauréal |
| Mayor: | Marcel Elisée Allegre[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 79 |
| Elevation Max M: | 197 |
| Area Km2: | 5.61 |
| Insee: | 95253 |
| Postal Code: | 95450 |
Frémainville (in French pronounced as /fʁemɛ̃vil/) is a commune in the Val-d'Oise department in Île-de-France in northern France.