title: Communauté d'agglomération Plaine Vallée
text: # Communauté d'agglomération Plaine Vallée
  
  Communauté d'agglomération Plaine Vallée is the communauté d'agglomération, an intercommunal structure, covering northwestern suburbs of Paris. It is located in the Val-d'Oise department, in the Île-de-France region, northern France. It was created in January 2016. Its seat is in Montmorency. Its area is 74.1 $km^2.$ Its population was 182,585 in 2018.
  
  ## Composition
  
  The communauté d'agglomération consists of the following 18 communes:
  
  * Andilly
  * Attainville
  * Bouffémont
  * Deuil-la-Barre
  * Domont
  * Enghien-les-Bains
  * Ézanville
  * Groslay
  * Margency
  * Moisselles
  * Montlignon
  * Montmagny
  * Montmorency
  * Piscop
  * Saint-Brice-sous-Forêt
  * Saint-Gratien
  * Saint-Prix
  * Soisy-sous-Montmorency
  