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Location (in red) within Paris inner and outer suburbs
Location of Poissy
Location (in red) within Paris inner and outer suburbs
Poissy (Île-de-France (region))
Coordinates: 48°55′46″N 2°02′44″E / 48.9294°N 2.0456°E / 48.9294; 2.0456Coordinates: 48°55′46″N 2°02′44″E / 48.9294°N 2.0456°E / 48.9294; 2.0456
IntercommunalityCU Grand Paris Seine et Oise
 • Mayor (2020-2026) Karl Olive
13.28 km2 (5.13 sq mi)
 (Jan. 2018)[1]
 • Density2,900/km2 (7,500/sq mi)
Time zoneUTC+01:00 (CET)
 • Summer (DST)UTC+02:00 (CEST)
INSEE/Postal code
78498 /78300
Elevation17–171 m (56–561 ft)
(avg. 27 m or 89 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

Poissy (French: [pwasi] (About this soundlisten)) is a commune in the Yvelines department in the Île-de-France in north-central France. It is located in the western suburbs of Paris, 23.8 km (14.8 mi) from the centre of Paris. Inhabitants are called Pisciacais.

In 1561 it was the site of a fruitless Catholic-Huguenot conference, the Colloquy of Poissy. It is known for hosting the Automobiles Gregoire successively, Matford, Ford SAF, Simca, Chrysler, Talbot factories and now hosts one of France's largest Peugeot factories. The "Simca Poissy engine" was made here.


Historical population
YearPop.±% p.a.
1793 2,807—    
1800 2,437−2.00%
1806 2,500+0.43%
1821 2,643+0.37%
1831 2,850+0.76%
1836 2,880+0.21%
1841 3,925+6.39%
1846 4,261+1.66%
1851 4,300+0.18%
1856 4,951+2.86%
1861 5,101+0.60%
1866 4,973−0.51%
1872 5,047+0.25%
1876 5,063+0.08%
1881 5,600+2.04%
1886 6,403+2.72%
1891 6,432+0.09%
1896 6,981+1.65%
YearPop.±% p.a.
1901 7,406+1.19%
1906 7,959+1.45%
1911 8,709+1.82%
1921 10,135+1.53%
1926 11,298+2.20%
1931 12,386+1.86%
1936 12,502+0.19%
1946 13,375+0.68%
1954 15,046+1.48%
1962 28,548+8.34%
1968 33,613+2.76%
1975 37,497+1.57%
1982 36,389−0.43%
1990 36,745+0.12%
1999 35,841−0.28%
2007 37,109+0.44%
2012 37,597+0.26%
2017 37,388−0.11%
Source: EHESS[2] and INSEE (1968-2017)[3]


Poissy is served by Poissy station on Paris RER line A and on the Transilien Paris-Saint-Lazare suburban rail line.


Main companies

PSA Peugeot-Citroën
PSA Peugeot-Citroën



Technoparc is a Business Park created in 1990, with the intention to facilitate the economic diversification of the city. It occupies about 66 acres on the northeast of PSA Peugeot Citroën factory, bordering the neighbouring commune Achères. The Park welcomes 150 companies employing a total of 2,000 employees. It also hosts The Charles-de-Gaulle High School and The Training Centre for the Employees in Pharmacy (ACPPAV) gathering 1,500 high school students and students. Two business incubator, a heliport, the Chamber of Commerce of Yvelines-Val d'Oise, two hotels, a sports centre and a municipal technical centre are also located there.


Dimanche à Poissy by Meissonier, 1851
Dimanche à Poissy by Meissonier, 1851



Cultural facilities

Poissy in film


Collège Jean Jaurès
Collège Jean Jaurès

Poissy has ten public preschools, ten public elementary schools, two junior high schools, two senior high schools, a combined junior-senior high school, along with a private preschool and elementary school.[6]

Public secondary schools:

Private elementary schools:


International relations

Main article: List of twin towns and sister cities in France

Boulevard de Pirmasens in Poissy
Boulevard de Pirmasens in Poissy

Poissy is twinned with:



Stadium Léo-Lagrange
Stadium Léo-Lagrange

See also


  1. ^ "Populations légales 2018". The National Institute of Statistics and Economic Studies. 28 December 2020.
  2. ^ Des villages de Cassini aux communes d'aujourd'hui: Commune data sheet Poissy, EHESS. (in French)
  3. ^ Population en historique depuis 1968, INSEE
  4. ^ Noyau de Poissy website (in French)
  5. ^ "French Blood (2015) - IMDb".
  6. ^ "Les établissements scolaires ." Poissy. Retrieved on September 2, 2016.