Montgeron Population and Area (Essonne)
Largest city in France 2026: up-to-date figures for Montgeron (Essonne)
Montgeron: Population and Area
With 24,316 inhabitants (INSEE total population in force on January 1, 2026), Montgeron is the 378th most populous town in France in 2026 and the 18th most populous in the Essonne department, out of 194 communes. It covers 11 km² (16,994th largest area in France, 54th largest in the department), with a population density of 2,167 inhabitants per km², or 20 times the national average (110 inhabitants/km²), which ranks it 417th in France for density.
Montgeron is located in the Essonne department (91), in the Île-de-France region, where it ranks 138th by population out of 1,266 communes. The most populous town in the Essonne department is Évry-Courcouronnes (67,272 inhabitants); the department is home to 1,351,891 people over 1,804 km².
See the full ranking of communes in the Essonne department and the regional ranking: largest city in Île-de-France.
Towns of similar size in the Essonne department: Grigny (pop. 26,888), Brunoy (pop. 26,090), Les Ulis (pop. 25,986), Gif-sur-Yvette (pop. 23,077), Longjumeau (pop. 22,131), Saint-Michel-sur-Orge (pop. 21,901).
Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 91421. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.