Saint-Cyr-l'École Population and Area (Yvelines)
Largest city in France 2026: up-to-date figures for Saint-Cyr-l'École (Yvelines)
Saint-Cyr-l'École Population
21,838 inhabitantsTOP #437
Saint-Cyr-l'École: Population and Area
With 21,838 inhabitants (INSEE total population in force on January 1, 2026), Saint-Cyr-l'École is the 437th most populous town in France in 2026 and the 21st most populous in the Yvelines department, out of 259 communes. It covers 5.01 km² (29,612th largest area in France, 181st largest in the department), with a population density of 4,359 inhabitants per km², or 40 times the national average (110 inhabitants/km²), which ranks it 173rd in France for density.
Saint-Cyr-l'École is located in the Yvelines department (78), in the Île-de-France region, where it ranks 161st 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: Vélizy-Villacoublay (pop. 23,206), Mantes-la-Ville (pop. 22,504), Achères (pop. 22,367), Carrières-sous-Poissy (pop. 20,950), La Celle-Saint-Cloud (pop. 20,900), Maurepas (pop. 20,844).
Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 78545. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.