| Hérouville-en-Vexin | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Hérouville (Val-d'Oise).svg |
| Coordinates: | 49.1019°N 2.1336°W |
| Arrondissement: | Pontoise |
| Canton: | Saint-Ouen-l'Aumône |
| Intercommunality: | Sausseron Impressionistes |
| Mayor: | Eric Baert[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 81 |
| Elevation Max M: | 120 |
| Area Km2: | 8.42 |
| Insee: | 95308 |
| Postal Code: | 95300 |
Hérouville-en-Vexin (in French pronounced as /eʁuvil ɑ̃ vɛksɛ̃/, literally Hérouville in Vexin; before 2017: Hérouville)[2] is a commune in the Val-d'Oise department in Île-de-France in northern France.