The Milan metropolitan area, also known as Grande Milano, is the largest metropolitan area in Italy and the 54th largest in the world. It is the largest transnational metropolitan area in the EU. The metropolitan area described in this article is strictly statistical and, contrary to the administrative Metropolitan City of Milan, a provincial-level municipality, does not imply any kind of administrative unity or function.

A transborder agglomeration is an urban agglomeration or conurbation that extends into multiple sovereign states and/or dependent territories. It includes city-states that agglomerate with their neighbouring countries.