SourcesList includes metropolitan areas according only studies of ESPON, Eurostat, and OECD. For this reason some metropolitan areas, like Italian Genoa, Genoa Metropolitan Area (population is over 1.510.000 as of 2012 according ''"CityRailway" Official Report''), aren't included in this list, with data by other statistic survey institutes. Figures in the first column come from the ESPON project, "Study on Urban Functions", which defines cities according to the concept of a functional urban area (core urban area defined morphologically on the basis of population density, plus the surrounding labour pool defined on the basis of commuting). Figures in the second column come from Eurostat's Urban Audit and correspond to Larger Urban Zones (LUZ). Figures in the fourth column come from the OECD Territorial Reviews and correspond to "metropolitan regions". Further information on how the areas are defined can be found in the source documents. These figures should be seen as an interpretation, not as conclusive fact.
Polycentric metropolitan areas in the European Union
See also*List of cities in Europe by population within city limits *List of urban areas in Europe *List of European city regions *Lists of cities in Europe *List of largest cities in the European Union by population within city limits *List of urban areas in the European Union *List of European Union cities proper by population density *List of metropolitan areas by population for the world *World's largest cities
Regional and country-specific lists*Largest metropolitan areas in the Nordic countries *List of metropolitan areas in the United Kingdom *List of metropolitan areas in Belgium *List of metropolitan areas in France *List of metropolitan areas in Germany *List of metropolitan areas in Italy *List of metropolitan areas in Spain *List of metropolitan areas in Sweden *Metropolitan areas in Poland, List of metropolitan areas in Poland