The organisation named Communauté de Communes du Haut Pays du Montreuillois is a group of municipalities in the department of the Pas-de-Calais, in Hauts-de-France. The total population of this intermunicipal organisation is 16538 inhabitants, spread across a surface area of 420.75 km². The population density is 37 inhabitants/km². The altitude varies between 26 metres and 202 metres. The Communauté de Communes du Haut Pays du Montreuillois public intermunicipal cooperation establishment comprises the 49 municipalities listed below.