Montreuil-sur-Mer (officially Montreuil) is a sub-prefecture of the northern France, in département of Pas-de-Calais (zone 62). It is located on Canche, not far from Étaples.

Its postal code is 62170

Population (1999): 2,688 inhabitants for the city, 21,603 inhabitants for the canton and 99,288 inhabitants for the district. This one comprises 7 cantons (list).

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