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Release: Parliamentary Constituency Population Estimates (experimental), Mid-2012

Released: 26 November 2013


Pete Large

Population Estimates Unit

Telephone: +44 (0)1329 444661

Categories: Population, Population Change, Population Estimates, Population Estimates by Age and Sex

Frequency of release: Annually

Language: English

Geographical coverage: England and Wales

Geographical breakdown: Parliamentary Constituency

  • The 573 Westminster Parliamentary Constituencies in England and Wales have a mean population of 98,700 in mid-2012.

  • On average Westminster Parliamentary Constituencies in Wales have smaller populations than those in England, with a mean population size of 76,900 compared to 100,400 in England.

  • Predominantly urban ‘borough’ constituencies have a mean population size of 103,400; while the more rural ‘county’ constituencies have a mean population size of 94,900.

  • The parliamentary constituency with the greatest population increase in the year to mid-2012 was Poplar and Limehouse (3.9%) while Kensington had the greatest population decrease (-2%).

  • The population age distribution varies widely across the country with the parliamentary constituencies with the youngest median ages being located in central areas of large cities.

  • Parliamentary constituency population estimates are of particular interest to parliamentary organisations, researchers and MPs.

This product is part of the set of Small Area Population Estimates (SAPE) and includes mid-2012 estimates for the 573 Westminster parliamentary constituencies in England and Wales.

Supporting Material

Population estimates methodology

Mid-2012 Ward Population Estimates

Mid-2012 Output Area


Mid-2011 Parliamentary Constituency Population Estimates (Census Based)

Mid-2002 to Mid-2010 Parliamentary Constituency Population Estimates - revised

Mid-2001 Parliamentary Constituency Population Estimates

Content from the Office for National Statistics.
© Crown Copyright applies unless otherwise stated.