Communauté d'agglomération Plaine Vallée is the ''

communauté d'agglomération An agglomeration community (, ) is a consortium of communes in France, communes (municipality, municipalities) in France, created as a government structure by the Jean-Pierre Chevènement, Chevènement Law of 1999. It is one of four forms of co ...

'', an intercommunal structure, covering northwestern suburbs of

Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...

. It is located in the

Val-d'Oise Val-d'Oise (, "Vale of the Oise") is a department in the Île-de-France region, Northern France. It was created in 1968 following the split of the Seine-et-Oise department. In 2019, Val-d'Oise had a population of 1,249,674.< ...

department, in the

Île-de-France The Île-de-France (; ; ) is the most populous of the eighteen regions of France, with an official estimated population of 12,271,794 residents on 1 January 2023. Centered on the capital Paris, it is located in the north-central part of the cou ...

region In geography, regions, otherwise referred to as areas, zones, lands or territories, are portions of the Earth's surface that are broadly divided by physical characteristics (physical geography), human impact characteristics (human geography), and ...

, northern

France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...

. Established in November 2015, effective from January 2016, its seat is in Montmorency.CA Plaine Vallée (N° SIREN : 200056380)
BANATIC, accessed 4 November 2024. Its area is 74.1 km,² and its population was 184,945 in 2021.Comparateur de territoire
INSEE, accessed 4 November 2024.

Composition

The communauté d'agglomération consists of the following 18 communes: # Andilly #

Attainville Attainville () is a commune in the Val-d'Oise department in Île-de-France in northern France. Population See also *Communes of the Val-d'Oise department The following is a list of the 183 Communes of France, communes of the Val-d'Oise De ...

# Bouffémont #

Deuil-la-Barre Deuil-la-Barre () is a commune in the northern suburbs of Paris, France. It is in the Department of Val-d'Oise and the arrondissement of Sarcelles. It is from the centre of Paris. Despite this proximity to the metropolis, Deuil has retained m ...

# Domont #

Enghien-les-Bains Enghien-les-Bains () is a Communes of France, commune in the Departements of France, department of Val-d'Oise, France. It is located in the northern suburbs of Paris, from the Kilometre Zero, centre of Paris. Enghien-les-Bains is famous as a s ...

# Ézanville # Groslay # Margency # Moisselles #

Montlignon Montlignon () is a commune in the Val-d'Oise department in Île-de-France in northern France. Population See also *Communes of the Val-d'Oise department The following is a list of the 183 Communes of France, communes of the Val-d'Oise Depa ...

# Montmagny # Montmorency # Piscop #

Saint-Brice-sous-Forêt Saint-Brice-sous-Forêt () is a Communes of France, commune in the Val-d'Oise Departments of France, department in Île-de-France in northern France. Sarcelles–Saint-Brice station has rail connections to Persan, Luzarches and Paris. Population ...

# Saint-Gratien # Saint-Prix #

Soisy-sous-Montmorency Soisy-sous-Montmorency (, 'Soisy under Montmorency') is a commune in the Val-d'Oise department located north of Paris, France. History On 7 August 1850, a part of the territory of Soisy-sous-Montmorency was detached and merged with a part of ...

References

Plaine Vallee Plaine Vallee {{ValOise-geo-stub