This bulletin presents the 2011 mid-year population estimates for lower layer and middle layer Super Output Areas (LSOA and MSOA respectively), which are small areas within England and Wales. It also describes recent changes, the impact of these changes on local areas within England and Wales and population age distributions within these areas.
Key points
- 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.
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