JCDecaux Group is a multinational corporation based in Neuilly-sur-Seine, near Paris, France, known for its bus-stop advertising systems, billboards, public bicycle rental systems, and street furniture. It is the largest outdoor advertising corporation in the world.

Neuilly-sur-Seine, also known simply as Neuilly, is an urban commune in the Hauts-de-Seine department just west of Paris in France. Immediately adjacent to the city, north of the Bois de Boulogne, the area is composed of mostly select residential neighbourhoods, as well as many corporate headquarters and a handful of foreign embassies. One of the most affluent areas of France, it is the wealthiest and most expensive suburb of Paris.