Boulogne-Billancourt Population and Area (Hauts-de-Seine)

Boulogne-Billancourt: Population and Area

With 120,206 inhabitants (INSEE total population in force on January 1, 2026), Boulogne-Billancourt is the 34^th most populous town in France in 2026 and the most populous in the Hauts-de-Seine department, out of 36 communes. It covers 6.17 km² (26,935^th largest area in France, 10^th largest in the department), with a population density of 19,482 inhabitants per km², or 178 times the national average (110 inhabitants/km²), which ranks it 10^th in France for density.

Boulogne-Billancourt is located in the Hauts-de-Seine department (92), in the Île-de-France region, where it ranks 3^rd by population out of 1,266 communes. It is the most populous town in the Hauts-de-Seine department, which is home to 1,670,575 people over 176 km².

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

Towns of similar size in the Hauts-de-Seine department: Nanterre (pop. 98,383), Asnières-sur-Seine (pop. 94,562), Colombes (pop. 91,663).

Sources: INSEE, official population figures in force on January 1, 2026 (total population); areas: IGN / Observatoire des territoires; INSEE code 92012. Rankings are calculated across the 34,858 communes of metropolitan and overseas France in our database.

Welcome to the page dedicated to Boulogne-Billancourt, a dynamic and attractive town in the Hauts-de-Seine department, in the Île-de-France region. With a population of over 120,000, Boulogne-Billancourt is the most populous town in the department.

Boulogne-Billancourt is a green town with 41 parks and gardens. The Berges de Seine, a park laid out along the banks of the Seine, offer a peaceful setting for walking, exercising or enjoying a drink on a terrace.

The town is also rich in cultural and historical heritage. The Musée des Années 30 is an art and design museum devoted to Art Deco and the 1930s. The Théâtre de l'Ouest Parisien offers a varied program of plays, concerts and children's shows. The Pathé Boulogne cinema is a modern multiplex with several screens.

Boulogne-Billancourt is also an economically dynamic town with many companies and industries.

The town is also known for its large number of schools, from preschool to university. Parents can choose from a wide variety of elementary and secondary schools, while students can pursue higher education at the nearby Université Paris-Nanterre.

Boulogne-Billancourt is a dynamic town offering plenty of activities and amenities to suit every taste. If you are looking for a pleasant place to live, work or study, Boulogne-Billancourt is an excellent choice.