Demographics of the United Kingdom

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The population of the United Kingdom was estimated at 69.5 million in 2025. It is the 21st most populated country in the world and has a population density of 287 people per square kilometre (740 people/mi2), with England having significantly greater density than Wales, Scotland, and Northern Ireland. Almost a third of the population lives in south east England, which is predominantly urban and suburban, with 9,122,909 people in the capital city, London, whose population density was 5,804 inhabitants per square kilometre (15,030/sq mi) in 2025. The population of the UK has undergone demographic transition— from a typically pre-industrial population, with high birth and mortality rates and slow population growth, through a stage of falling mortality and faster rates of population growth, to a stage of low birth and mortality rates with, again, lower rates of growth. This growth through 'natural change' has been accompanied in the past three decades by growth through net immigration into...

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