Boulogne-Billancourt is a locality located 8.4 km east-northeast from Paris in Ile-de-France, France. The population of Boulogne-Billancourt is 121,334 people. Clamart, Issy-les-Moulineaux, Montrouge are located close to Boulogne-Billancourt. You can find Boulogne-Billancourt on any map using the following decimal coordinates: 48.8353 (latitude), 2.2414 (longitude).