The Brussels metropolitan area (French: Région métropolitaine de Bruxelles; Dutch: Stedelijk gebied van Brussel) is the metropolitan area of Brussels.The metropolitan area covers three regions with an area of 3,377 km2 (1,304 sq mi).The largest cities or towns within the metropolitan area are Brussels, Leuven and Vilvoorde.In 2021 Brussels' gross metropolitan product was €163.3 billion.This puts Brussels in 8th place among cities in European Union.