Boulogne-Billancourt (; often colloquially called simply Boulogne) is a commune in the western suburbs of Paris, France. It is located from the centre of Paris. Boulogne-Billancourt is a subprefecture of the Hauts-de-Seine department and the seat of the Arrondissement of Boulogne-Billancourt.

Boulogne-Billancourt (; often colloquially called simply Boulogne) is a commune in the western suburbs of Paris, France. It is located from the centre of Paris. Boulogne-Billancourt is a subprefecture of the Hauts-de-Seine department and the seat of the Arrondissement of Boulogne-Billancourt.