In France, a banlieue is a suburb of a large city, or all its suburbs taken collectively. Banlieues are divided into autonomous administrative entities and do not constitute part of the city proper. For instance, 80 percent of the inhabitants of the Paris metropolitan area live outside the city of Paris.
Example of a low-income banlieue Sarcelles
Example of a high-income banlieue Neuilly-sur-Seine
The west of Paris and its suburbs is dominated by middle- and upper-class residents, while the northeast has a large concentration of residents living in poverty.
Example of a low-income banlieue Saint-Ouen-sur-Seine
Les Ulis is a commune in the Essonne department located in the southwestern suburbs (banlieue) of Paris, France. It is 23 km (14 mi) from the centre of Paris.
Housing projects
Les Ulis as a building site, 1977.