The Communauté d'agglomération du Boulonnais, created in January 2000, is a communauté d'agglomération (an intercommunal structure) centered on the city of Boulogne-sur-Mer. It is located in the Pas-de-Calais department, in the Hauts-de-France region in northern France. Its area is 205.1 km2. Its population was 112,836 in 2018, of which 40,664 in Boulogne-sur-Mer proper. (from Wikipedia)