This is a list of the most heavily populated metropolitan areas in Europe, and it includes the 2010 population estimates, which are based on a mixture of official and independent sources. Some of the metropolitan areas listed below are also cities proper, but many others are groupings of cities, towns and urban areas.

Basic definition of a ‘Metropolitan Area’ according to Wikipedia:
A metropolitan area is a large population center consisting of a large metropolis and its adjacent zone of influence, or of more than one closely adjoining neighboring central cities and their zone of influence. One or more large cities may serve as its hub or hubs, and the metropolitan area is normally named after either the largest or most important central city within it.