Hérouville-en-Vexin (, literally Hérouville in Vexin; before 2017: Hérouville)Décret n° 2017-1744 22 December 2017 is a commune in the Val-d'Oise department in Île-de-France in northern France.
See also Château d'Hérouville Communes of the Val-d'Oise department
References
External links Official website
Association of Mayors of the Val d'Oise