Sarcelles in the context of Arrondissement of Sarcelles

The Communauté d'agglomération Roissy Pays de France is a communauté d'agglomération in the Val-d'Oise and Seine-et-Marne départements and in the Île-de-France région of France. It was formed on 1 January 2016 by the merger of the former communauté d'agglomération Val de France, communauté d'agglomération Roissy Porte de France and 17 communes that were part of the Communauté de communes Plaines et Monts de France. Its seat is in Roissy-en-France. Its area is 340.9 km. Its population was 354,451 in 2018, of which 2,858 in Roissy-en-France and 58,811 in Sarcelles, the largest commune of the communauté d'agglomération.

In France, a banlieue (UK: /bɒnˈljuː/; French: [bɑ̃ljø] ) 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.

Beginning in the 1970s, the term banlieue has taken on a particular connotation, becoming a popular word for economically-deprived suburbs featuring low-income housing projects (HLMs) that are home to large immigrant populations. People of foreign descent reside in what are often called poverty traps. As of 2025, in France, approximately 1,500 suburbs are home to more than 5 million people.