London is the capital and most crowded city of England and the United Kingdom. Remaining on the River Thames in the south east of the island of Great Britain, London has been a noteworthy settlement for two centuries. It was established by the Romans, who named it Londinium. London's antiquated centre, the City of London, to a great extent holds its 1.12-square-mile (2.9 km2) medieval limits. Since in any event the nineteenth century, "London" has likewise alluded to the city around this centre, truly split between Middlesex, Essex, Surrey, Kent and Hertfordshire, which today to a great extent makes up Greater London, a locale administered by the Mayor of London and the London Assembly.

London is the capital and most crowded city of England and the United Kingdom. Remaining on the River Thames in the south east of the island of Great Britain, London has been a noteworthy settlement for two centuries. It was established by the Romans, who named it Londinium. London's antiquated centre, the City of London, to a great extent holds its 1.12-square-mile (2.9 km2) medieval limits. Since in any event the nineteenth century, "London" has likewise alluded to the city around this centre, truly split between Middlesex, Essex, Surrey, Kent and Hertfordshire, which today to a great extent makes up Greater London, a locale administered by the Mayor of London and the London Assembly.

London has a differing scope of individuals and societies, and in excess of 300 dialects are talked in the locale. Its evaluated mid-2016 city populace (comparing to Greater London) was 8,787,892, the biggest of any city in the European Union and representing 13.4% of the UK populace. London's urban zone is the second most crowded in the EU, after Paris, with 9,787,426 tenants at the 2011 evaluation. The city's metropolitan zone is the most crowded in the EU with 14,040,163 occupants in 2016, while the Greater London Authority expresses the number of inhabitants in the city-district (covering a vast piece of the south east) as 22.7 million. London was the world's most crowded city from around 1831 to 1925.