Skip to content

Release: Super Output Area mid-year population estimates for England and Wales, Mid-2011 (Census Based)

Released: 11 April 2013 Next edition: 17 October 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: Super Output Area and Data Zone

  • In mid-2011 there were 34,753 lower layer Super Output Areas (LSOAs) in England and Wales with a mean population of 1,620 and 7,102 middle layer Super Output Areas (MSOAs) with a mean population of 7,800.

  • The LSOAs with the highest population densities are all in Inner London, with the most densely populated area being Kensington and Chelsea 021C.

  • The least densely populated LSOA in England and Wales is Northumberland 019C in Northumberland National Park.

  • Mid-2011 Super Output Area (SOA) population estimates are based on the results of the 2011 Census. Previous estimates based on the 2001 Census and updated annually over the ten year period were within 5% of the 2011 Census based estimate in approximately 65% of LSOAs.

  • SOA population estimates are particularly important for use in many areas of research as they provide key demographic information on small geographic areas that were designed specifically for the purpose of enabling statistical analysis.

This product is part of the set of Small Area Population Estimates (SAPE). It includes estimates of the usually resident population as at 30 June of the reference year for Lower Layer and Middle Layer Super Output Areas (SOAs) in England and Wales by age and sex. These estimates are consistent with the Census based local authority, regional and national population estimates. Estimates reflect the new SOA boundaries introduced for the publication of 2011 Census results.

This release also includes additional tables of supporting information:

  • Population Density for LSOA and MSOA

  • Rolled Forward mid-2011 population estimates for LSOA and MSOA. These estimates are based on the 2001 Census and are provided for comparison purposes only. They are not part of the official series of SOA population estimates.


Supporting Material

Quality and Methodology Information (QMI) (167.1 Kb Pdf)

Methodology note on production of super output area population estimates



Super Output Areas - Mid-2012

Super Output Areas - Mid-2011 (Census Based - by single year of age)

Super Output Areas - Mid-2002 to Mid-2010 Revised

Super Output Areas - Mid-2001

The United Kingdom Statistics Authority has designated these statistics as National Statistics, in accordance with the Statistics and Registration Service Act 2007 and signifying compliance with the Code of Practice for Official Statistics.

Designation can be broadly interpreted to mean that the statistics:

  • meet identified user needs;
  • are well explained and readily accessible;
  • are produced according to sound methods; and
  • are managed impartially and objectively in the public interest.

Once statistics have been designated as National Statistics it is a statutory requirement that the Code of Practice shall continue to be observed.

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