A smawer aurie o 3,838 square kilometres (1,482 sq mi) is govrened bi the Montreal Metropolitan Community (MMC) (French: Communauté métropolitaine de Montréal, CMM). This level o govrenment is heidit bi a preses (currently Montreal mayor Gérald Tremblay).
The inner ring is composed o densely populatit municipalities located in close proximity tae Dountoun Montreal. It includes the entire Island o Montreal, Laval, an the Urban Agglomeration o Longueuil.
The ooter ring is composed o law-densitie municipalities locatit on the fringe o Metropolitan Montreal. Maist o these ceeties an touns are semi-rural. Specifically, the term aff-island suburbs refers tae those suburbs that are locatit on the North Shore o the Mille-Îles River, those on the South Shore that were never included in the megacity of Longueuil, and those on the Vaudreuil-Soulanges Peninsula. Commonties in that aurie are informally referred tae as the 450 an aw, efter the telephone aurie code that haes servit the region syne 1998.