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.

[1] The communauté d'agglomération consists of the following 22 communes:[2][3]