Poissy

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Poissy
Commune
Coat of arms
Location (in red) within Paris inner and outer suburbs
Location of Poissy
Poissy Show map of France Poissy Show map of Île-de-France (region)
Coordinates: 48°55′46″N 2°02′44″E / 48.9294°N 2.0456°E / 48.9294; 2.0456
Country	France
Region	Île-de-France
Department	Yvelines
Arrondissement	Saint-Germain-en-Laye
Canton	Poissy
Intercommunality	CU Grand Paris Seine et Oise
Government
• Mayor (2022–2026)	Sandrine Berno Dos Santos[1]
Area 1	13.28 km2 (5.13 sq mi)
Population  (2021)[2]	40,016
• Density	3,000/km2 (7,800/sq mi)
Demonym(s)	Pisciacais (masculine) Pisciacaise (feminine)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	78498 /78300
Elevation	17–171 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] ^ⓘ) is a commune in the Yvelines department in the Île-de-France region 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 French.

Poissy is one of the oldest royal cities of Île-de-France, birthplace of Louis IX of France and Philip III of France, before being supplanted from the 15th century by Saint-Germain-en-Laye. In 1561, it was the site of a fruitless Catholic–Huguenot conference, the Colloquy of Poissy.

The area 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 there.

Poissy is the 165th most populated city in Metropolitan France.