Boulogne-Billancourt

Boulogne-Billancourt (French pronunciation: [bulɔɲ bijɑ̃kuʁ]; often colloquially called simply Boulogne, until 1924 Boulogne-sur-Seine, [bulɔɲ syʁ sɛn]) is a wealthy and prestigious commune in the Parisian area, located 8 km (5 mi) from its centre. It is a subprefecture of the Hauts-de-Seine department and thus the seat of the larger arrondissement of Boulogne-Billancourt. Boulogne-Billancourt includes two large islands in the Seine: Île Saint-Germain and Île Seguin. With a population of 121,334 as of 2018, it is the most populous commune in Hauts-de-Seine and most populous suburb of Paris, as well as one of the most densely populated municipalities in Europe.[citation needed]

Boulogne-Billancourt
Paris and inner ring departments
Location of Boulogne-Billancourt
Boulogne-Billancourt
Boulogne-Billancourt
Coordinates: 48°50′07″N 2°14′27″E
CountryFrance
RegionÎle-de-France
DepartmentHauts-de-Seine
ArrondissementBoulogne-Billancourt
CantonBoulogne-Billancourt-1 and 2
IntercommunalityGrand Paris
Government
  Mayor (20202026) Pierre-Christophe Baguet[1] (LR)
Area
1
6.17 km2 (2.38 sq mi)
Population
 (Jan. 2019)[2]
121,583
  Density20,000/km2 (51,000/sq mi)
Time zoneUTC+01:00 (CET)
  Summer (DST)UTC+02:00 (CEST)
INSEE/Postal code
92012 /92100
Elevation28–40 m (92–131 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

Boulogne-Billancourt is one of the wealthiest regions in the Parisian area and in France.[3] Formerly an important industrial site, it has successfully reconverted into business services and is now home to major communication companies headquartered in the Val de Seine business district.


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