Écouen is located in France (Val d'Oise, Île-de-France) and time zone Europe/Paris.
Places nearby are Ézanville, Villiers-le-Bel and Sarcelles.
Marne La Vallée is 29 km away, London is 339 km away and Nantes is 372 km away as the crow flies.
Distances from Écouen to the most important cities in France and the world.
49.0206200°
2.3830900°
French "grande école" (ENS Paris)
https://en.wikipedia.org/wiki/École_normale_supérieure_(Paris)