London has a relatively young population with a large annual turnover of population.
The region received 154,000 international migrants in 2009, equivalent to 2 per cent of its population. Migration to London from the rest of the UK accounted for a further 178,000 new residents. About 339,000 people left London in 2009 − 216,000 went to other parts of the UK and 123,000 to other countries. This large annual turnover resulted in a small net decrease in the region’s population of 8,000.
London’s age structure also differs from other regions, the population tending to be younger than in the country as a whole. In mid-2010, 19.6 per cent of the population were aged under 16, compared with 18.7 per cent in England, and 43.0 per cent were in the age group 20 to 44 compared with only 34.4 per cent of the England population. Only 11.5 per cent of the population were aged 65 or over compared with 16.5 per cent for England.
London is the second largest region in terms of total population (after the South East), accounting for 15 per cent of the England total. There were 7.8 million residents in mid-2010, an increase from 7.3 million in 2001, with the average annual increase working out at nearly 56,000. The 2008-based population projections suggest the population could increase by 15.8 per cent between 2010 and 2030 to 9.0 million by 2030.
In mid-2010 the average population density of London was 5,000 people per sq km, but there were considerable differences between the boroughs. The most densely populated boroughs were Kensington and Chelsea with 14,000 people per sq km, and Islington with nearly 13,100.
Source: Office for National Statistics
Population estimates and projections are for 30 June each year. The mid-2010 population estimates are those published on 30 June 2011 and the 2008-based subnational population projections are those published on 27 May 2010.
Migration data are for calendar years and were published on 25 November 2010.
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