Sannois Population and Area (Val-d'Oise)
Largest city in France 2026: up-to-date figures for Sannois (Val-d'Oise)
Sannois: Population and Area
With 27,266 inhabitants (INSEE total population in force on January 1, 2026), Sannois is the 332nd most populous town in France in 2026 and the 15th most populous in the Val-d'Oise department, out of 183 communes. It covers 4.78 km² (30,122nd largest area in France, 116th largest in the department), with a population density of 5,704 inhabitants per km², or 52 times the national average (110 inhabitants/km²), which ranks it 111th in France for density.
Sannois is located in the Val-d'Oise department (95), in the Île-de-France region, where it ranks 125th by population out of 1,266 communes. The most populous town in the Val-d'Oise department is Argenteuil (106,546 inhabitants); the department is home to 1,290,942 people over 1,246 km².
See the full ranking of communes in the Val-d'Oise department and the regional ranking: largest city in Île-de-France.
Towns of similar size in the Val-d'Oise department: Gonesse (pop. 27,794), Taverny (pop. 27,756), Cormeilles-en-Parisis (pop. 27,522), Eaubonne (pop. 26,558), Saint-Ouen-l'Aumône (pop. 25,699), Deuil-la-Barre (pop. 23,287).
Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 95582. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.