Us, Val-d'Oise

Us is a commune. It is in Île-de-France in the Val-d'Oise department in north France.
Geography.
The commune is on the river Viosne, about 40 km northwest of Paris. The neighbouring communes are Ableiges, Frémécourt, Le Perchay, Santeuil, Théméricourt and Vigny.
It is in the regional nature park of Vexin.