Athletic Club de Boulogne-Billancourt or A.C.B.B. is a French sports club based in the suburbs of Paris in the commune of Boulogne-Billancourt. The club offers a variety of sports, but is primarily known for cycling, rugby union, judo, figure skating, and swimming. In all sports combined, Boulogne-Billancourt has produced 28 Olympic medalists, 42 World champions, and 67 European champions, if you take into account the sports club predecessor, which comprised seven local sports clubs in the area. The last Olympic medalist was Larbi Benboudaoud, who captured the silver medal at the 2000 Summer Olympics in Sydney, Australia.

Boulogne-Billancourt is a wealthy and prestigious commune in the western suburbs of Paris, France, located 8.2 km (5 mi) from the centre of Paris. It is a subprefecture of the Hauts-de-Seine department and thus the seat of the larger arrondissement of Boulogne-Billancourt. It is also part of the Métropole du Grand Paris. Boulogne-Billancourt includes one island in the Seine: Île Seguin.