Where are the largest metropolitan regions in the EU?

In 2023, there were 5 metropolitan regions in the EU with over 5 million people.

The EU's largest metropolitan region in 2023 was Paris in France, with a population of 12.4 million people, followed by the Spanish metropolitan regions of Madrid and Barcelona with 6.9 and 5.8 million inhabitants, respectively. Berlin, with a total population of 5.5 million, and the Ruhrgebiet metropolitan region in Germany (5.1 million residents), completed the top 5.

Over the last 5 years (from 2018 to 2023), the most significant population growth was observed in Madrid (+322 000), Barcelona (+282 000), and Berlin (+222 000).

Among the top 10 largest metropolitan regions, Barcelona, Madrid, and Amsterdam experienced the highest relative growth rates, with their populations expanding by 5%. On the other hand, the Italian capital region of Rome was the only metropolitan region that experienced a noticeable population decline compared with 2018 (-129 000), while Milan's population remained relatively stable (-6 000).

https://ec.europa.eu/eurostat/web/products-eurostat-news/w/ddn-20240318-2