Carrières-sous-Poissy Population and Area (Yvelines)
Largest city in France 2026: up-to-date figures for Carrières-sous-Poissy (Yvelines)
Carrières-sous-Poissy Density
2,914 inhabitants/km²TOP #304
Carrières-sous-Poissy: Population and Area
With 20,950 inhabitants (INSEE total population in force on January 1, 2026), Carrières-sous-Poissy is the 463rd most populous town in France in 2026 and the 22nd most populous in the Yvelines department, out of 259 communes. It covers 7.19 km² (24,614th largest area in France, 130th largest in the department), with a population density of 2,914 inhabitants per km², or 27 times the national average (110 inhabitants/km²), which ranks it 304th in France for density.
Carrières-sous-Poissy is located in the Yvelines department (78), in the Île-de-France region, where it ranks 170th by population out of 1,266 communes. The most populous town in the Yvelines department is Versailles (85,750 inhabitants); the department is home to 1,508,510 people over 2,284 km².
See the full ranking of communes in the Yvelines department and the regional ranking: largest city in Île-de-France.
Towns of similar size in the Yvelines department: Mantes-la-Ville (pop. 22,504), Achères (pop. 22,367), Saint-Cyr-l'École (pop. 21,838), La Celle-Saint-Cloud (pop. 20,900), Maurepas (pop. 20,844), Limay (pop. 18,010).
Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 78123. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.