Flexanville is a commune in the Yvelines department in the Île-de-France region of north-central France. River The commune shares its name with a small river that passes through it, la Flexanville. This waterway flows through eight other communes for a total distance of . The Flexanville is a tributary of the Vaucouleurs which in turn empties into the Seine. Views See also Communes of the Yvelines department References Communes of Yvelines