Préfecture (capital): Cergy[?]
Sous-préfectures: Argenteuil[?], Montmorency[?] and Pontoise[?].
List of Communes of the Val-d'Oise département of France
... The population density is 365.9/km² (938.3/mi²). There are 163 housing units at an average density of 143.0/km² (366.8/mi²). The racial makeup of ...