Outer London is the name for the group of London Boroughs that form a ring around Inner London.

These were areas that were not part of the County of London and became formally part of Greater London in 1965. An exception is North Woolwich, which was in the County of London but was transferred to Newham in 1965.

The outer London boroughs were defined by the London Government Act 1963.

The Office for National Statistics and the Census define Outer London differently, excluding Haringey and Newham (which are defined as Inner London), and including Greenwich. This is reflected in the Nomenclature of Territorial Units for Statistics (NUTS) classification. Under this classification, Outer London consists of Barking and Dagenham, Barnet, Bexley, Brent, Bromley, Croydon, Ealing, Enfield, Greenwich, Harrow, Havering, Hillingdon, Hounslow, Kingston upon Thames, Merton, Redbridge, Richmond upon Thames, Sutton, and Waltham Forest.

Please note: Figures here are for the Office for National Statistics defined Outer London (in its 2001 limits), whose land area is 1,254 km² (484 sq. miles). Figures before 1971 have been reconstructed by the Office for National Statistics based on past censuses in order to fit the 2001 limits. Figures from 1981 onward are midyear estimates, with those for 2002 to 2009 having been revised during 2010. These mid-year estimates are more accurate than the censuses themselves, which are known to underestimate the population of London.

London ⁱ/ˈlʌndən/ is the capital city of England and the United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its founding by the Romans, who named it Londinium. London's ancient core, the City of London, largely retains its square-mile mediaeval boundaries. Since at least the 19th century, the name London has also referred to the metropolis developed around this core. The bulk of this conurbation forms the London region and the Greater London administrative area, governed by the elected Mayor of London and the London Assembly.

London is a leading global city, with strengths in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism and transport all contributing to its prominence. It is the world's leading financial centre alongside New York City and has the fifth-largest city GDP in the world (and the largest in Europe). London has been described as a world cultural capital. It was the world's most visited city during 2011 and London Heathrow is the world's busiest airport by number of international passengers. London's 43 universities form the largest concentration of higher education in Europe. In 2012 London will become the first city to host the modern Summer Olympic Games three times.

Alexander Boris de Pfeffel Johnson (born 19 June 1964) is an American-born British Conservative Party politician and journalist, who has been the elected Mayor of London since 2008. He was previously the Member of Parliament for Henley and editor of The Spectator magazine.

Johnson was educated at Primrose Hill Primary School, the European School of Brussels, Ashdown House School, Eton College, and Balliol College, Oxford, where he read Literae Humaniores. He began his career in journalism with The Times, and later moved on to The Daily Telegraph where he became assistant editor. He was appointed editor of The Spectator in 1999. In the 2001 general election he was elected to the House of Commons and became one of the most conspicuous politicians in the country. He has also written several books.

Under Michael Howard, Johnson briefly served on the Conservative front bench as the Shadow Minister for the Arts from April 2004 until November 2004. When David Cameron was elected leader of the Conservative Party in 2005, Johnson was re-appointed to the front bench as Shadow Minister for Higher Education and resigned as editor of The Spectator.