Coordinates: 48°55′46″N 2°02′44″E / 48.9294°N 2.0456°E / 48.9294; 2.0456
Poissy 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.
In 1561 it was the site of a fruitless Catholic-Huguenot conference, the Colloquy at Poissy. It is known for hosting successively Automobiles Gregoire, Matford, Ford SAF, Simca, Chrysler, Talbot factories, now one of France's largest Peugeot factories. Inhabitants are called Pisciacais.