Rosny-sous-Bois Population and Area (Seine-Saint-Denis)
Largest city in France 2026: up-to-date figures for Rosny-sous-Bois (Seine-Saint-Denis)
Rosny-sous-Bois: Population and Area
With 47,368 inhabitants (INSEE total population in force on January 1, 2026), Rosny-sous-Bois is the 148th most populous town in France in 2026 and the 15th most populous in the Seine-Saint-Denis department, out of 39 communes. It covers 5.91 km² (27,528th largest area in France, 15th largest in the department), with a population density of 8,015 inhabitants per km², or 73 times the national average (110 inhabitants/km²), which ranks it 67th in France for density.
Rosny-sous-Bois is located in the Seine-Saint-Denis department (93), in the Île-de-France region, where it ranks 50th by population out of 1,266 communes. The most populous town in the Seine-Saint-Denis department is Saint-Denis (149,936 inhabitants); the department is home to 1,710,659 people over 236 km².
See the full ranking of communes in the Seine-Saint-Denis department and the regional ranking: largest city in Île-de-France.
Towns of similar size in the Seine-Saint-Denis department: Sevran (pop. 52,682), Bondy (pop. 50,762), Livry-Gargan (pop. 47,453), La Courneuve (pop. 47,285), Noisy-le-Sec (pop. 45,634), Bagnolet (pop. 43,234).
Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 93064. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.