Boulogne-sur-Mer Population and Area (Pas-de-Calais)

Boulogne-sur-Mer: Population and Area

With 40,924 inhabitants (INSEE total population in force on January 1, 2026), Boulogne-sur-Mer is the 198^th most populous town in France in 2026 and the 3^rd most populous in the Pas-de-Calais department, out of 887 communes. It covers 8.42 km² (21,998^th largest area in France, 283^rd largest in the department), with a population density of 4,860 inhabitants per km², or 44 times the national average (110 inhabitants/km²), which ranks it 148^th in France for density.

Boulogne-sur-Mer is located in the Pas-de-Calais department (62), in the Hauts-de-France region (formerly Nord-Pas-de-Calais), where it ranks 16^th by population out of 3,782 communes. The most populous town in the Pas-de-Calais department is Calais (68,246 inhabitants); the department is home to 1,479,365 people over 6,671 km².

See the full ranking of communes in the Pas-de-Calais department and the regional ranking: largest city in Hauts-de-France.

Towns of similar size in the Pas-de-Calais department: Calais (pop. 68,246), Arras (pop. 43,765), Lens (pop. 33,122), Liévin (pop. 30,398), Hénin-Beaumont (pop. 26,029).

Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 62160. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.