This is a list of urban areas in the European Union with over 500,000 inhabitants as of 2022.
The data comes from Demographia and the United Nations Department of Economic and Social Affairs.
[1][2] Demographia provides figures for urban areas (including conurbations),[1] while the UN DESA figures are a mix agglomerations, cities proper and metropolitan areas.
[2] For comparison, Function Urban Area (FUA) population figures by Eurostat are also provided,[3] however, these measure the wider metropolitan areas.
http://www.demographia.com/db-worldua.pdf