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A labelled map of the Greater London Built-up Area
Greater London Built-up Area with administrative borders

The Greater London Built-up Area, or Greater London Urban Area, is a conurbation in south-east England that constitutes the continuous urban area of London, and includes surrounding adjacent urban towns as defined by the Office for National Statistics.[1] It is the largest urban area in the United Kingdom with a population of 9,787,426 in 2011.[1]



Satellite view of the inner parts of the Greater London Built-up Area.

The Greater London Built-up or Urban Area had a population of 9,787,426 and occupied an area of 1,737.9 square kilometres (671.0 sq mi) at the time of the 2011 census.[1]

It includes most of the London region – omitting most of its woodland, small, buffered districts, the Lee Valley Park, and the two largest sewage treatment works serving London by the River Thames. Outside the region's administrative boundary, it includes contiguous suburban settlements and a few densely populated outliers connected to it by ribbon development. Its outer boundary is constrained by the Metropolitan Green Belt and it is therefore much smaller than the wider metropolitan area of London.[citation needed]

As a selective grouping of relatively low- to mid-density (and some high-density) output areas, each consisting of roughly 120 households,[2] it can be compared to the London region, which covers 1,572 square kilometres (607 sq mi) and contained 8,173,194 residents at the time of the 2011 census.

The built-up area of the Greater London region continues beyond the region's administrative boundary in some places, while stopping short of it in others. For this reason, the density of the Greater London Built-Up Area is 8.3% higher than that of Greater London, the figure for which includes these outlying rural areas (notably in Hillingdon, Enfield, Havering and Bromley). All of both areas is drained ultimately by the River Thames. The area uses around 4 gigawatts of electricity power.[3]

2011 Census subdivisionsEdit

At the time of the 2011 Census, the Office for National Statistics defined the Greater London Urban Area as being made up of the following components:.[1]

London regionEdit

The London region consists of 33 districts: the City of London, the 12 Inner London boroughs (including the City of Westminster), and the 20 Outer London boroughs.



Omitted areasEdit

The following areas were considered Built-up areas in the 2011 census but lay outside the Greater London Built-up Area although they lay inside Greater London. All of these areas had populations of less than a thousand except New Addington and Harefield which had populations of 22,280 and 6,573 respectively.[1]

2001 Census subdivisionsEdit

At the time of the 2001 Census, the Office for National Statistics defined the Greater London Urban Area as being made up of the following components:

London regionEdit

Within the region there were 33 components corresponding to the City of London and the London boroughs. However, the boundaries are not identical and outlying areas such as Biggin Hill in Bromley are omitted.[7]

Outside Greater LondonEdit

See alsoEdit

References and NotesEdit

  1. ^ a b c d e "2011 Census – Built-up areas". ONS. Retrieved 28 January 2014.
  2. ^ Guidance and Methodology Office for National Statistics. Retrieved 31 October 2013
  3. ^ "Electricity now flows across continents, courtesy of direct current". The Economist. 14 January 2017. Archived from the original on 21 January 2017. Retrieved 21 January 2017. 4,000MW. That is almost enough electricity to power Greater London
  4. ^ Includes the town of Dartford
  5. ^ Surrey
  6. ^ a b Included under Walton-on-Thames subdivision
  7. ^ "List of Urban Area Names and Codes in England and Wales". Office for National Statistics. Retrieved 14 June 2013.

Coordinates: 51°30′26″N 0°07′40″W / 51.5073°N 0.1277°W / 51.5073; -0.1277