European Population

There are many ways to rank cities by population:

-Strictly by the population within the city limits
-Include the urban area, but no "satellite cites"
-Include the entire metropolitan area: cities, farmland and smaller towns, defined in Europe as the LUZ (large urban zone).

Bucharest, for example, has the sixth largest population in the EU within its city limits. Expand the definition to urban area, and it drops to number 20. Expand it out to the entire LUZ and it drops to 23 on the list.

Those rankings are for the current EU, but if Turkey is admitted, all of those would go up by 3, since Istanbul, Ankara and Izmir are larger by all definitions. In fact, Istanbul would be number one for city limit population at 11.1 million. London would still hold the top LUZ rank with 11.9 million.