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.

The 7th arrondissement of Paris is one of the 20 arrondissements of the capital city of France. In spoken French, this arrondissement is referred to as le septième.