Communauté d'agglomération des Deux Baies en Montreuillois

The Communauté d'agglomération des Deux Baies en Montreuillois is a communauté d'agglomération, an intercommunal structure, in the Pas-de-Calais department, in the Hauts-de-France region, northern France. It was created in January 2017 by the merger of the former communautés de communes Montreuillois, Opale Sud and Mer et Terres d'Opale. Its population was 68,673 in 2014. Its seat is in Montreuil.

The communauté d'agglomération consists of the following 46 communes: