Mid-year (30 June) estimates of the usual resident population for Lower layer Super Output Areas (LSOAs) in England and Wales by broad age groups and sex.

This dataset provides Census 2021 estimates that classify usual residents in England and Wales by sex and single year of age. The estimates are as at Census Day, 21 March 2021.

The classifications for the datasets TS009 Sex by single year of age and RM200 Sex by single year of age (detailed) are the same. However, RM200 has data available at the lower geographies of:

• Lower layer Super Output Areas (LSOAs)
• Middle layer Super Output Areas (MSOAs)
• Electoral wards and divisions
• Westminster parliamentary constituencies

Estimates for single year of age between ages 90 and 100+ are less reliable than other ages. Estimation and adjustment at these ages was based on the age range 90+ rather than five-year age bands.

Read more about this quality notice.

Area type

Census 2021 statistics are published for a number of different geographies. These can be large, for example the whole of England, or small, for example an output area (OA), the lowest level of geography for which statistics are produced.

For higher levels of geography, more detailed statistics can be produced. When a lower level of geography is used, such as output areas (which have a minimum of 100 persons), the statistics produced have less detail. This is to protect the confidentiality of people and ensure that individuals or their characteristics cannot be identified.

Coverage

Census 2021 statistics are published for the whole of England and Wales. Data are also available in these geographic types:

• country - for example, Wales
• region - for example, London
• local authority - for example, Cornwall
• health area – for example, Clinical Commissioning Group
• statistical area - for example, MSOA or LSOA

Sex

This is the sex recorded by the person completing the census. The options were “Female” and “Male”.

Age

A person’s age on Census Day, 21 March 2021 in England and Wales. Infants aged under 1 year are classified as 0 years of age.

Mid-2018 Population Estimates for Lower Super Output Areas in Leicester by Age and Age bands. Data was originally published 25 October 2019.

Lower and Middle Super Output Area populations by single year of age for both current and previous boundaries. Data for previous boundaries has been apportioned by the Greater London Authority. Areas that have merged were calculated using proportions from previous Mid-year population estimates (pre-revision) and applying it to the current estimates.

Data downloads:

Lower Super Output Areas (LSOA)

- current LSOA boundaries (2011) (ZIPPED) 2001-2014

- previous LSOA boundaries (2001) (ZIPPED) 2001-2013 no longer updated

Middle Super Output Areas (MSOA)

- current MSOA boundaries (2011) 2002-2014

- previous MSOA boundaries (2001) 2001-2013 no longer updated

The data is presented by sex and single year of age and also in a custom-age tool. Simply enter the age group required for males and females and the tool will automatically calculate the figure.

NB Data for current boundaries includes single year of age data for 85-89, while data for previous boundaries contains single years up to 85+.

Land Area and Population Density for MSOA and LSOA (2011) is available for most recent year in a separate file.

Download from ONS or new ONS page.

This dataset provides Census 2021 estimates that classify usual residents in England and Wales by single year of age. The estimates are as at Census Day, 21 March 2021.

+Estimates for single year of age between ages 90 and 100+ are less reliable than other ages. Estimation and adjustment at these ages was based on the age range 90+ rather than five-year age bands._

Read more about this quality notice.

This update provides unrounded population and household estimates, by single year of age. The accompanying data are provided at even more detailed geographies, down to Output Areas where possible.

Area type

Census 2021 statistics are published for a number of different geographies. These can be large, for example the whole of England, or small, for example an output area (OA), the lowest level of geography for which statistics are produced.

For higher levels of geography, more detailed statistics can be produced. When a lower level of geography is used, such as output areas (which have a minimum of 100 persons), the statistics produced have less detail. This is to protect the confidentiality of people and ensure that individuals or their characteristics cannot be identified.

Coverage

Census 2021 statistics are published for the whole of England and Wales. Data are also available in these geographic types:

• country - for example, Wales
• region - for example, London
• local authority - for example, Cornwall
• health area – for example, Clinical Commissioning Group
• statistical area - for example, MSOA or LSOA

Age

A person’s age on Census Day, 21 March 2021 in England and Wales. Infants aged under 1 year are classified as 0 years of age.

National and subnational mid-year population estimates for the UK and its constituent countries by administrative area, age and sex (including components of population change, median age and population density).

The LSOA atlas provides a summary of demographic and related data for each Lower Super Output Area in Greater London. The average population of an LSOA in London in 2010 was 1,722 compared with 8,346 for an MSOA and 13,078 for a ward. The profiles are designed to provide an overview of the population in these small areas by combining a range of data on the population, diversity, households, health, housing, crime, benefits, land use, deprivation, schools, and employment. Due to significant population change in some areas, not all 2011 LSOA boundaries are the same as previous LSOA boundaries that had been used from 2001. A lot of data is still only available using the 2001 boundaries therefore two Atlases have been created - one using the current LSOA boundaries (2011) and one using the previous boundaries (2001). If you need to find an LSOA and you know the postcode of the area, the ONS NESS search page has a tool for this. The LSOA Atlas is available as an XLS as well as being presented using InstantAtlas mapping software. This is a useful tool for displaying a large amount of data for numerous geographies, in one place (requires HTML 5). CURRENT LSOA BOUNDARIES (2011) NOTE: There is comparatively less data for the new boundaries compared with the old boundaries PREVIOUS LSOA BOUNDARIES (2001) For 2011 Census data used in the 2001 Boundaries Atlas: For simplicity, where two or more areas have been merged, the figures for these areas have been divided by the number of LSOAs that used to make that area up. Therefore, these data are not official ONS statisitcs, but presented here as indicative to display trends. NB. It is currently not possible to export the map as a picture due to a software issue with the Google Maps background. We advise you to print screen to copy an image to the clipboard. IMPORTANT: Due to the large amount of data and areas, the LSOA Atlas may take up to a minute to fully load. Once loaded, the report will work more efficiently by using the filter tool and selecting one borough at a time. Displaying every LSOA in London will slow down the data reload. Tips: - Select a new indicator from the Data box on the left. Select the theme, then indicator and then year to show the data. - To view data just for one borough, use the filter tool. - The legend settings can be altered by clicking on the pencil icon next to the LSOA tick box within the map legend. - The areas can be ranked in order by clicking at the top of the indicator column of the data table. Beware of large file size for 2001 Boundary Atlas (58MB) alternatively download Zip file (21MB). Themes included in the atlases are Census 2011 population, Mid-year Estimates by age, Population Density, Households, Household Composition, Ethnic Group, Language, Religion, Country of Birth, Tenure, Number of dwellings, Vacant Dwellings, Dwellings by Council Tax Band, Crime (numbers), Crime (rates), Economic Activity, Qualifications, House Prices, Workplace employment numbers, Claimant Count, Employment and Support Allowance, Benefits claimants, State Pension, Pension Credit, Incapacity Benefit/ SDA, Disability Living Allowance, Income Support, Financial vulnerability, Health and Disability, Land use, Air Emissions, Energy consumption, Car or Van access, Accessibility by Public Transport/walk, Road Casualties, Child Benefit, Child Poverty, Lone Parent Families, Out-of-Work families, Fuel Poverty, Free School Meals, Pupil Absence, Early Years Foundation Stage, Key Stage 1, Key Stage 2, GCSE, Level 3 (e.g A/AS level), The Indices of Deprivation 2010, Economic Deprivation Index, and The IMD 2010 Underlying Indicators. The London boroughs are: City of London, Barking and Dagenham, Barnet, Bexley, Brent, Bromley, Camden, Croydon, Ealing, Enfield, Greenwich, Hackney, Hammersmith and Fulham, Haringey, Harrow, Havering, Hillingdon, Hounslow, Islington, Kensington and Chelsea, Kingston upon Thames, Lambeth, Lewisham, Merton, Newham, Redbridge, Richmond upon Thames, Southwark, Sutton, Tower Hamlets, Waltham Forest, Wandsworth, Westminster. These profiles were created using the most up to date information available at the time of collection (Spring 2014). You may also be interested in MSOA Atlas and Ward Atlas.

This dataset provides population estimates for the lower layer super output areas (LSOAs), middle layer super output areas (MSOAs), upper layer super output areas (USOAs) and local authorities in Wales. These estimates are consistent with the results of the 2011 Census and are available for the 2011 LSOA, MSOA and USOA geographic boundaries published in October 2012. Super output areas (SOAs) were introduced in 2004 to improve the reporting of small area statistics. They are built from groups of census output areas, are of a consistent size and are not subject to boundary changes between censuses. Where possible they are formed from groups of socially similar households and align with local features such as roads and railway lines. The comparability and stability of the geography is a key benefit to users of statistics which cannot be provided by other small area administrative geographies such as wards or parishes. Following the 2011 Census, some boundary changes to SOAs were required and the new set of SOA boundaries was published in October 2012, although the stability of the geography has been largely maintained. Three hierarchical levels of SOAs are available in Wales. LSOAs were designed to have a population of between 1,000 and 3,000 in 2011, and there are 1,909 of them in Wales. MSOAs were designed as aggregations of LSOAs, had a population of between 5,000 and 15,000 in 2011, and there are 410 of them in Wales. USOAs are aggregations of MSOAs and were defined in conjunction with local authorities in Wales. There are 94 of them in Wales and they are only defined in Wales. This data does not differ from that published in the separate table (POPU1015), but it is presented using a different hierarchy to allow the user to more easily select the data from a single layer of the geography (for example, selecting only the lower super output areas, without the other area types). Further information on SOAs, can be obtained from the geography section of the ONS website (see weblinks). This material is Crown Copyright and may be re-used (not including logos) free of charge in any format or medium, under the terms of the Open Government Licence.

The LSOA atlas provides a summary of demographic and related data for each Lower Super Output Area in Greater London. The average population of an LSOA in London in 2010 was 1,722 compared with 8,346 for an MSOA and 13,078 for a ward.

The profiles are designed to provide an overview of the population in these small areas by combining a range of data on the population, diversity, households, health, housing, crime, benefits, land use, deprivation, schools, and employment.

Due to significant population change in some areas, not all 2011 LSOA boundaries are the same as previous LSOA boundaries that had been used from 2001. A lot of data is still only available using the 2001 boundaries therefore two Atlases have been created - one using the current LSOA boundaries (2011) and one using the previous boundaries (2001).

If you need to find an LSOA and you know the postcode of the area, the ONS NESS search page has a tool for this.

The LSOA Atlas is available as an XLS as well as being presented using InstantAtlas mapping software. This is a useful tool for displaying a large amount of data for numerous geographies, in one place (requires HTML 5).

CURRENT LSOA BOUNDARIES (2011)

NOTE: There is comparatively less data for the new boundaries compared with the old boundaries

PREVIOUS LSOA BOUNDARIES (2001)

For 2011 Census data used in the 2001 Boundaries Atlas: For simplicity, where two or more areas have been merged, the figures for these areas have been divided by the number of LSOAs that used to make that area up. Therefore, these data are not official ONS statisitcs, but presented here as indicative to display trends.

NB. It is currently not possible to export the map as a picture due to a software issue with the Google Maps background. We advise you to print screen to copy an image to the clipboard.

IMPORTANT: Due to the large amount of data and areas, the LSOA Atlas may take up to a minute to fully load. Once loaded, the report will work more efficiently by using the filter tool and selecting one borough at a time. Displaying every LSOA in London will slow down the data reload.

Tips:

1. - Select a new indicator from the Data box on the left. Select the theme, then indicator and then year to show the data.

2. - To view data just for one borough, use the filter tool.

3. - The legend settings can be altered by clicking on the pencil icon next to the LSOA tick box within the map legend.

4. - The areas can be ranked in order by clicking at the top of the indicator column of the data table.

Beware of large file size for 2001 Boundary Atlas (58MB) alternatively download Zip file (21MB).

Themes included in the atlases are Census 2011 population, Mid-year Estimates by age, Population Density, Households, Household Composition, Ethnic Group, Language, Religion, Country of Birth, Tenure, Number of dwellings, Vacant Dwellings, Dwellings by Council Tax Band, Crime (numbers), Crime (rates), Economic Activity, Qualifications, House Prices, Workplace employment numbers, Claimant Count, Employment and Support Allowance, Benefits claimants, State Pension, Pension Credit, Incapacity Benefit/ SDA, Disability Living Allowance, Income Support, Financial vulnerability, Health and Disability, Land use, Air Emissions, Energy consumption, Car or Van access, Accessibility by Public Transport/walk, Road Casualties, Child Benefit, Child Poverty, Lone Parent Families, Out-of-Work families, Fuel Poverty, Free School Meals, Pupil Absence, Early Years Foundation Stage, Key Stage 1, Key Stage 2, GCSE, Level 3 (e.g A/AS level), The Indices of Deprivation 2010, Economic Deprivation Index, and The IMD 2010 Underlying Indicators.

The London boroughs are: City of London, Barking and Dagenham, Barnet, Bexley, Brent, Bromley, Camden, Croydon, Ealing, Enfield, Greenwich, Hackney, Hammersmith and Fulham, Haringey, Harrow, Havering, Hillingdon, Hounslow, Islington, Kensington and Chelsea, Kingston upon Thames, Lambeth, Lewisham, Merton, Newham, Redbridge, Richmond upon Thames, Southwark, Sutton, Tower Hamlets, Waltham Forest, Wandsworth, Westminster.

These profiles were created using the most up to date information available at the time of collection (Spring 2014).

You may also be interested in MSOA Atlas and Ward Atlas.

This MSOA atlas provides a summary of demographic and related data for each Middle Super Output Area in Greater London. The average population of an MSOA in London in 2010 was 8,346, compared with 1,722 for an LSOA and 13,078 for a ward.

The profiles are designed to provide an overview of the population in these small areas by combining a range of data on the population, births, deaths, health, housing, crime, commercial property/floorspace, income, poverty, benefits, land use, environment, deprivation, schools, and employment.

If you need to find an MSOA and you know the postcode of the area, the ONS NESS search page has a tool for this.

The MSOA Atlas is available as an XLS as well as being presented using InstantAtlas mapping software. This is a useful tool for displaying a large amount of data for numerous geographies, in one place (requires HTML 5).

CURRENT MSOA BOUNDARIES (2011)

PREVIOUS MSOA BOUNDARIES (2001)

NB. It is currently not possible to export the map as a picture due to a software issue with the Google Maps background. We advise you to print screen to copy an image to the clipboard.

Tips:

1. - Select a new indicator from the Data box on the left. Select the theme, then indicator and then year to show the data.

2. - To view data just for one borough*, use the filter tool.

3. - The legend settings can be altered by clicking on the pencil icon next to the MSOA tick box within the map legend.

4. - The areas can be ranked in order by clicking at the top of the indicator column of the data table.

Themes included here are Census 2011 Population, Mid-year Estimates, Population by Broad Age, Households, Household composition, Ethnic Group, Country of Birth, Language, Religion, Tenure, Dwelling type, Land Area, Population Density, Births, General Fertility Rate, Deaths, Standardised Mortality Ratio (SMR), Population Turnover Rates (per 1000), Crime (numbers), Crime (rates), House Prices, Commercial property (number), Rateable Value (£ per m2), Floorspace; ('000s m2), Household Income, Household Poverty, County Court Judgements (2005), Qualifications, Economic Activity, Employees, Employment, Claimant Count, Pupil Absence, Early Years Foundation Stage, Key Stage 1, GCSE and Equivalent, Health, Air Emissions, Car or Van availability, Income Deprivation, Central Heating, Incidence of Cancer, Life Expectancy, and Road Casualties.

• The London boroughs are: City of London, Barking and Dagenham, Barnet, Bexley, Brent, Bromley, Camden, Croydon, Ealing, Enfield, Greenwich, Hackney, Hammersmith and Fulham, Haringey, Harrow, Havering, Hillingdon, Hounslow, Islington, Kensington and Chelsea, Kingston upon Thames, Lambeth, Lewisham, Merton, Newham, Redbridge, Richmond upon Thames, Southwark, Sutton, Tower Hamlets, Waltham Forest, Wandsworth, Westminster.

These profiles were created using the most up to date information available at the time of collection (Spring 2014).

You may also be interested in LSOA Atlas and Ward Atlas.

Data are extracted as a quarterly snapshot in time from the GP Payments system maintained by the Health and Social Care Information Centre (HSCIC). This release is an accurate snapshot as at 1 April 2015. Since April 2014, geographical references have been taken from 2011 census information. At GP Practice level data are released in single year of age bands and 5-year age bands both of which finish at 95+, split by gender and aggregated. At Clinical Commissioning Group, NHS England Area Team and NHS England Region levels, data are released in 5-year age bands which now finish at 95+, split by gender and aggregated. For the above reports, the data for GP Practices with 100 or fewer registered patients has been suppressed due to possible identification of individuals when data are linked to other data sets. Data for GP practices at Lower Super Output Area (LSOA) level are provided by gender but not by age bands so no suppression is required. An additional machine readable version is provided in practice / LSOA /totals format. Further information on LSOA is available via the link below.

Data for this publication are extracted each month as a snapshot in time from the Primary Care Registration database within the PDS (Personal Demographics Service) system. This release is an accurate snapshot as at 1 June 2025. GP Practice; Primary Care Network (PCN); Sub Integrated Care Board Locations (SICBL); Integrated Care Board (ICB) and NHS England Commissioning Region level data are released in single year of age (SYOA) and 5-year age bands, both of which finish at 95+, split by gender. In addition, organisational mapping data is available to derive PCN; SICBL; ICB and Commissioning Region associated with a GP practice and is updated each month to give relevant organisational mapping. Quarterly publications in January, April, July and October will include Lower Layer Super Output Area (LSOA) populations.

The NTEM SynthPop project required open data, as per OGL License (v1.0).

The data register:

data_register:
geography_msoa_ew:
description: MSOA boundaries, 2021.
geography: MSOA
region: England and Wales
last accessed: 10/06/2024
link: https://geoportal.statistics.gov.uk/datasets/ons::middle-layer-super-output-areas-december-2021-boundaries-ew-bsc-v2/about
notes: (BSC) Super generalised (200m) - clipped to the coastline (Mean High Water mark).
path: "MSOA_2021_EW_BSC_V2.gpkg"
source: Open Geography Portal
year: 2021
geography_iz_sc:
description: Proposed IZ boundaries, 2022.
geography: IZ
region: Scotland
last accessed: 19/08/2024
link: https://scotgov.maps.arcgis.com/home/item.html?id=90bf46cbf2254e80820a98d815c8fbcf
notes: Proposed Intermediate Zones 2022 Boundaries - for consultation
path: "Proposed_IZ_2022_Boundaries.zip"
source: "Scotland Census"
year: 2022
geography_oa_ew:
description: OA boundaries, 2021.
geography: OA
region: England and Wales
last accessed: 24/06/2024
link: https://geoportal.statistics.gov.uk/datasets/ons::output-areas-december-2021-boundaries-ew-bgc-v2/about
notes: (BGC) Generalised (20m) - clipped to the coastline (Mean High Water mark).
path: "boundaries/Output_Areas_2021_EW_BGC_V2.gpkg"
source: Open Geography Portal
year: 2021
geography_lad_2018_gb:
description: LAD boundaries, 2018.
geography: LAD
region: England, Wales and Scotland
last accessed: 19/11/2024
link: https://geoportal.statistics.gov.uk/datasets/ons::local-authority-districts-december-2018-boundaries-gb-bfc-2/about
notes: This file contains the digital vector boundaries for Local Authority Districts in Great Britain, as at December 2018.
path: "boundaries/LAD_Dec_2018_Boundaries_GB_BFC_2022_544341751432792127.gpkg"
source: Open Geography Portal
year: 2018
geography_msoa_population_weighted_centroids_ew:
description: Population-weighted centroids for MSOA boundaries.
geography: MSOA
region: England & Wales
last accessed: 31/05/2024
link: https://geoportal.statistics.gov.uk
notes: "This file contains the digital population weighted centroids for Middle layer Super Output Areas for England and Wales as at 31 December 2021. The centroids were created using Full Resolution, Extent of the Realm boundaries. Contains both Ordnance Survey and ONS Intellectual Property Rights."
path: "boundaries/Middle_Super_Output_Areas_DEC_2021_EW_PWC.gpkg"
source: Office for National Statistics
year: 2021
geography_msoa_2011_2021_ew_lookup_best_fit:
description: Lookup table between 2011 and 2021 MSOA boundaries and 2022 Local Authority Districts (best fit).
geography: MSOA
region: England & Wales
last accessed: 31/05/2024
link: https://geoportal.statistics.gov.uk
notes: "A best fit lookup file between Middle layer Super Output Areas (MSOA) as at December 2011 and MSOAs as at December 2021 in England and Wales. The lookup contains all the 2011 MSOAs (7,201) and these are point-in-polygon to the 2021 MSOA full extent boundaries (which contains 7,182 records, so 82 MSOAs are missing from the 2021 MSOAs)."
path: "boundaries/MSOA_(2011)_to_MSOA_(2021)_to_Local_Authority_District_(2022)_Best_Fit_Lookup_for_EW_(V2).csv"
source: Office for National Statistics
year: 2021
geography_msoa_2011_2021_ew_lookup_exact_fit:
description: Lookup table between 2011 and 2021 MSOA boundaries and 2022 Local Authority Districts (exact fit).
geography: MSOA
region: England & Wales
last accessed: 31/05/2024
link: https://geoportal.statistics.gov.uk
notes: >
This is an exact fit lookup file between Middle layer Super Output Areas as at December 2011 and Middle layer Super Output Areas as at December 2021 and Local Authority Districts as at December 2022 in England and Wales. This product has been provided with a change indicator field, that define the lookup between 2011 and 2021 MSOA. This field indicates which output areas / super output areas have changed between 2011 and 2021. This version 2 has had some changes to the change indicator field where splits have gone to complexes in under 10 MSOAs. There are four designated categories to describe the changes, and these are as follows:
U - No Change from 2011 to 2021. This means that direct comparisons can be made between these 2011 and 2021 MSOA.
S - Split. This means that the 2011 MSOA has been split into two or more 2021 MSOA. There will be one record for each of the 2021 MSOA that the 2011 MSOA has been split into. This means direct comparisons can be made between estimates for the single 2011 MSOA and the estimates from the aggregated 2021 MSOA.
M - Merged. 2011 MSOA have been merged with another one or more 2011 MSOA to form a single 2021 MSOA. This means direct comparisons can be made between the aggregated 2011 MSOAs’ estimates and the single 2021 MSOA’s estimates.
X - The relationship between 2011 and 2021 MSOA is irregular and fragmented. This has occurred where 2011 MSOA have been redesigned because of local authority district boundary changes, or to improve their social homogeneity. These can’t be easily mapped to equivalent 2021 MSOA like the regular splits (S) and merges (M), and therefore like for like comparisons of estimates for 2011 MSOA and 2021 MSOA are not possible.'
path: "boundaries/MSOA_(2011)_to_MSOA_(2021)_to_Local_Authority_District_(2022)_Lookup_for_England_and_Wales.gpkg"
source: Office for National Statistics
year: 2021
lookup_msoa_2021_region_ew:
description: Lookup between 2021 Middle Layer Super Output Areas (MSOA), built up areas (BUA), local authority districts (LAD) and regions (RGN) (best fit).
geography: MSOA
region: England & Wales
last accessed: 24/06/2024
link: https://geoportal.statistics.gov.uk/datasets/ons::msoa-2021-to-bua-to-lad-to-region-december-2022-best-fit-lookup-in-ew-v2/about
notes: "A best fit lookup file between Middle layer Super Output Areas (MSOA) as at December 2011 and MSOAs as at December 2021 in England and Wales. The lookup contains all the 2011 MSOAs (7,201) and these are point-in-polygon to the 2021 MSOA full extent boundaries (which contains 7,182 records, so 82 MSOAs are missing from the 2021 MSOAs)."
path: "boundaries/MSOA_(2021)_to_Built-up_Area_to_Local_Authority_District_to_Region_(December_2022)_Lookup_in_England_and_Wales_v2.csv"
source: Office for National Statistics
year: 2021
lookup_oa_2011_oa_2021_ew:
description: Lookup between 2011 Output Areas (OA11) and 2021 Output Areas (OA21).
geography: OA
region: England & Wales
last accessed: 28/08/2024
link: https://geoportal.statistics.gov.uk/datasets/ons::oa-2011-to-oa-2021-to-local-authority-district-2022-exact-fit-lookup-in-ew-v2/about
notes: "This is an exact-fit lookup file between Output Areas as at December 2011 and Output Areas as at December 2021 and Local Authority Districts as at December 2022 in England and Wales."
path: "boundaries/OA11_OA21_LAD22_EW_LU_Exact_fit_V2_7175137222568651779.csv"
source: Office for National Statistics
year: 2021
lookup_oa_2021_msoa_2021_ew:
description: Lookup between Output Areas (OA 2021) and Middle Layer Super Output Areas (MSOA 2021).
geography: OA, MSOA
region: England & Wales
last accessed: 28/08/2024
link: https://geoportal.statistics.gov.uk/datasets/ons::output-area-2021-to-lsoa-to-msoa-to-lad-december-2021-exact-fit-lookup-in-ew-v3/about
notes: "A lookup between Output Areas (OA), Lower layer Super Output Areas (LSOA), Middle layer Super Output Areas (LSOA) and Local Authority Districts (LAD) as at 31 December 2021 in England and Wales."
path: "boundaries/Output_Area_to_Lower_layer_Super_Output_Area_to_Middle_layer_Super_Output_Area_to_Local_Authority_District_(December_2021)_Lookup_in_England_and_Wales_v3.csv"
source: Office for National Statistics
year: 2021
census_households_oa_2021_ew:
description: TS041-oa - Number of Households (output areas).
geography: OA
region: England & Wales
last accessed: 07/08/2024
link: https://www.nomisweb.co.uk/output/census/2021/census2021-ts041.zip
notes: Number of Households (oa).
path: "census_2021/census2021-ts041-oa.csv"
source: Office for National Statistics
year: 2021
ruc_oa_ew:
description: Rural / Urban classification at Output Area (OA) level.
geography: OA
region: England & Wales
last accessed: 07/08/2024
link: https://geoportal.statistics.gov.uk/datasets/53360acabd1e4567bc4b8d35081b36ff/about
notes: "This file provides a rural-urban view of 2011 Output Areas (OA) in England and Wales."
path: "ruc/RUC11_OA11_EW.csv"
source: Office for National Statistics
year: 2021
geography_ntem:
description: NTEM zoning system.
geography: NTEM
region: GB
path: "..."
year: 2021
template_populationsim:
description: Template PopulationSim set up.
geography: MSOA
region: GB
path: "template_populationsim"
source: PopulationSim repo & Arup
year: 2021
nts_persons:
description: Individuals table from the National Travel Survey for the period 2002-2022.
geography: Region
region: England, Wales & Scotland
path: "nts/individual_eul_2002-2022.tab"
nts_households:
description: Households table from the National Travel Survey for

The Area Level Index of Age Diversity (ALIAD) is based on the Simpson's Index of Diversity. It is commonly used in ecological studies to quantify the biodiversity of a habitat as it takes into account both the richness, i.e. the number of species present, and the evenness, i.e. the abundance of each species, within an environment. As species richness and evenness increase, so diversity increases. The index represents the probability that two randomly selected individuals will belong to different groups. It ranges from 0 and 100, with higher values representing greater diversity. ALIAD was computed for each Lower Super Output Area (LSOA) in England and Wales (E&W), each Data Zone (DZ) in Scotland and each Super Output Area (SOA) in Northern Ireland from 2002 to 2019. It is based on the mid-year population estimates (MYPE) for each area for each year. This is information is freely available in accordance with version 3.0 of the Open Government Licence. However, the different national statistical agencies compute MYPE for different age groups. In England and Wales estimates are provided for single-year age groups, i.e. the number of people aged 0, 1, 2, 3, etc. In Scotland estimates are provided for quinary age groups, i.e. the number of people aged 0-4, 5-9, 10-14, etc. In Northern Ireland (NI) estimates are provided for four larger age groups, i.e. 0-15, 16-39, 40-64 and 65+. It was decided to match the age groups to the NI classification as i) this would provide the greatest geographical coverage, ii) the estimates ought to be more robust and iii) in discussions with policy and practice stakeholders these age groups were seen as more meaningful than single-year or quinary age groups. An exact match was possible between the E&W and NI age groups. However, because of the use of quinary age groups it is not possible to get an exact match for all age groups in Scotland. Hence, the age groups used on Scotland are 0-14, 15-39, 40-64 and 65+.
The final dataset contains the computed ALIAD values for each of the 34,753 LSOAs, the 6,976 DZs and the 890 SOAs from 2002-2019. ALIAD has a range of 0-100. On this scale 0 would represent total age concentration, i.e. every member of the area is in the same age group, and 100 would represent complete age diversity within the area.

There is evidence that Britain is becoming more and more generationally divided. A major part of this is that the places where we live have become increasingly 'age segregated'. This means younger people tend to live in places where there are more younger people and older people tend to live in places where there are more older people. Deep generational divisions can have implications for social cohesion and effective societal functioning. Policy makers are concerned that this could have negative health, economic, social and political costs. Indeed, a recent report by the Resolution Foundation estimated that age-segregation could cost the UK economy £6 billion per year. However, there is currently no research in Britain that has been able to directly test whether living in areas with a greater mix of ages has an impact on people. By linking information on the number of people in different age groups at the local level with information from a long running survey, our project will be the first to do this. We will create a new measure, called the 'area level index of age diversity', for all the residential areas in Great Britain (these are called Lower Super Output Areas in England and Wales and Data Zones in Scotland). Unlike existing measures which tend to focus just on younger versus older adults, this new measure will use information from people of all ages to get a better idea of the mix of age groups in an area. The first thing we intend to do with this information is to produce a series of maps of Britain to show which local areas are more or less age diverse. This information will be very useful for local government, councils, city planners and the like. Once we have done this, we will then link our new measure of age diversity to information on around 50,000 people living in Britain who have been part of a long running study (called the UK Household Longitudinal Survey). This will enable us to see whether living in areas that have people from a wide (or narrow) range of age groups impacts on people's health (e.g. whether the person has an illness or chronic condition), well-being (e.g. loneliness), civic participation (e.g. whether someone volunteers or not), and neighbourhood quality (e.g. whether people trust their neighbours). Our findings will provide a much needed evidence base on the extent of local area level age diversity in Britain and what effect (if any) this has on people's lives.

This dataset provides Census 2021 estimates that classify usual residents in England and Wales by sex, and by age. The estimates are as at Census Day, 21 March 2021.

Estimates for single year of age between ages 90 and 100+ are less reliable than other ages. Estimation and adjustment at these ages was based on the age range 90+ rather than five-year age bands. Read more about this quality notice.

Area type

Census 2021 statistics are published for a number of different geographies. These can be large, for example the whole of England, or small, for example an output area (OA), the lowest level of geography for which statistics are produced.

For higher levels of geography, more detailed statistics can be produced. When a lower level of geography is used, such as output areas (which have a minimum of 100 persons), the statistics produced have less detail. This is to protect the confidentiality of people and ensure that individuals or their characteristics cannot be identified.

Lower tier local authorities

Lower tier local authorities provide a range of local services. There are 309 lower tier local authorities in England made up of 181 non-metropolitan districts, 59 unitary authorities, 36 metropolitan districts and 33 London boroughs (including City of London). In Wales there are 22 local authorities made up of 22 unitary authorities.

Coverage

Census 2021 statistics are published for the whole of England and Wales. However, you can choose to filter areas by:

• country - for example, Wales
• region - for example, London
• local authority - for example, Cornwall
• health area – for example, Clinical Commissioning Group
• statistical area - for example, MSOA or LSOA

Sex

This is the sex recorded by the person completing the census. The options were “Female” and “Male”.

Age

A person’s age on Census Day, 21 March 2021 in England and Wales. Infants aged under 1 year are classified as 0 years of age.

OverviewWater companies in the UK are responsible for testing the quality of drinking water. This dataset contains the results of samples taken from the taps in domestic households to make sure they meet the standards set out by UK and European legislation. This data shows the location, date, and measured levels of determinands set out by the Drinking Water Inspectorate (DWI).Key Definitions  AggregationProcess involving summarising or grouping data to obtain a single or reduced set of information, often for analysis or reporting purposes  Anonymisation Anonymised data is a type of information sanitisation in which data anonymisation tools encrypt or remove personally identifiable information from datasets for the purpose of preserving a data subject's privacy Dataset Structured and organised collection of related elements, often stored digitally, used for analysis and interpretation in various fields.  Determinand A constituent or property of drinking water which can be determined or estimated. DWI Drinking Water Inspectorate, an organisation “providing independent reassurance that water supplies in England and Wales are safe and drinking water quality is acceptable to consumers.”  DWI Determinands Constituents or properties that are tested for when evaluating a sample for its quality as per the guidance of the DWI. For this dataset, only determinands with “point of compliance” as “customer taps” are included.   Granularity Data granularity is a measure of the level of detail in a data structure. In time-series data, for example, the granularity of measurement might be based on intervals of years, months, weeks, days, or hours ID Abbreviation for Identification that refers to any means of verifying the unique identifier assigned to each asset for the purposes of tracking, management, and maintenance.  LSOA Lower-Level Super Output Area is made up of small geographic areas used for statistical and administrative purposes by the Office for National Statistics. It is designed to have homogeneous populations in terms of population size, making them suitable for statistical analysis and reporting. Each LSOA is built from groups of contiguous Output Areas with an average of about 1,500 residents or 650 households allowing for granular data collection useful for analysis, planning and policy- making while ensuring privacy.  ONS Office for National Statistics  Open Data Triage The process carried out by a Data Custodian to determine if there is any evidence of sensitivities associated with Data Assets, their associated Metadata and Software Scripts used to process Data Assets if they are used as Open Data.  Sample A sample is a representative segment or portion of water taken from a larger whole for the purpose of analysing or testing to ensure compliance with safety and quality standards.  Schema Structure for organizing and handling data within a dataset, defining the attributes, their data types, and the relationships between different entities. It acts as a framework that ensures data integrity and consistency by specifying permissible data types and constraints for each attribute.  Units Standard measurements used to quantify and compare different physical quantities.  Water Quality The chemical, physical, biological, and radiological characteristics of water, typically in relation to its suitability for a specific purpose, such as drinking, swimming, or ecological health. It is determined by assessing a variety of parameters, including but not limited to pH, turbidity, microbial content, dissolved oxygen, presence of substances and temperature.Data HistoryData Origin  These samples were taken from customer taps. They were then analysed for water quality, and the results were uploaded to a database. This dataset is an extract from this database.Data Triage Considerations Granularity Is it useful to share results as averages or individual? We decided to share as individual results as the lowest level of granularity Anonymisation It is a requirement that this data cannot be used to identify a singular person or household. We discussed many options for aggregating the data to a specific geography to ensure this requirement is met. The following geographical aggregations were discussed: • Water Supply Zone (WSZ) - Limits interoperability with other datasets • Postcode – Some postcodes contain very few households and may not offer necessary anonymisation • Postal Sector – Deemed not granular enough in highly populated areas • Rounded Co-ordinates – Not a recognised standard and may cause overlapping areas • MSOA – Deemed not granular enough • LSOA – Agreed as a recognised standard appropriate for England and Wales • Data Zones – Agreed as a recognised standard appropriate for Scotland Data Triage Review Frequency Annually unless otherwise requested Publish FrequencyAnnuallyData Specifications • Each dataset will cover a year of samples in calendar year • This dataset will be published annually • Historical datasets will be published as far back as 2016 from the introduction of The Water Supply (Water Quality) Regulations 2016 • The determinands included in the dataset are as per the list that is required to be reported to the Drinking Water Inspectorate. • A small proportion of samples could not be allocated to an LSOA – these represented less than 0.1% of samples and were removed from the dataset in 2023. • The postcode to LSOA lookup table used for 2022 was not available when 2023 data was processed, see supplementary information for the lookup table applied to each calendar year of data. Context Many UK water companies provide a search tool on their websites where you can search for water quality in your area by postcode. The results of the search may identify the water supply zone that supplies the postcode searched. Water supply zones are not linked to LSOAs which means the results may differ to this dataset. Some sample results are influenced by internal plumbing and may not be representative of drinking water quality in the wider area. Some samples are tested on site and others are sent to scientific laboratories.Supplementary informationBelow is a curated selection of links for additional reading, which provide a deeper understanding of this dataset.   1. Drinking Water Inspectorate Standards and Regulations: https://www.dwi.gov.uk/drinking-water-standards-and-regulations/   2. LSOA (England and Wales) and Data Zone (Scotland): https://www.nrscotland.gov.uk/files/geography/2011-census/geography-bckground-info-comparison-of-thresholds.pdf   3. Description for LSOA boundaries by the ONS: https://www.ons.gov.uk/methodology/geography/ukgeographies/censusgeographies/census2021geographies4. Postcode to LSOA lookup tables (2022 calendar year data): https://geoportal.statistics.gov.uk/datasets/postcode-to-2021-census-output-area-to-lower-layer-super-output-area-to-middle-layer-super-output-area-to-local-authority-district-august-2023-lookup-in-the-uk/about   5. Postcode to LSOA lookup tables (2023 calendar year data):  https://geoportal.statistics.gov.uk/datasets/b8451168e985446eb8269328615dec62/about6. Legislation history: https://www.dwi.gov.uk/water-companies/legislation/

Data for this publication are extracted each month as a snapshot in time from the Primary Care Registration database within the NHAIS (National Health Application and Infrastructure Services) system. This release is an accurate snapshot as at 1 April 2024. This publication also includes monthly data outputs from the Personal Demographic Service, which will become the data source for this publication from May 2024. More information about the data source change can be found in the Data Quality Statement. GP Practice; Primary Care Network (PCN); Sub Integrated Care Board Locations (SICBL); Integrated Care Board (ICB) and NHS England Commissioning Region level data are released in single year of age (SYOA) and 5-year age bands, both of which finish at 95+, split by gender. In addition, organisational mapping data is available to derive PCN; SICBL; ICB and Commissioning Region associated with a GP practice and is updated each month to give relevant organisational mapping. Quarterly publications in January, April, July and October will include Lower Layer Super Output Area (LSOA) populations.

Data for this publication are extracted each month as a snapshot in time from the Primary Care Registration database within the PDS (Personal Demographics Service) system. This release is an accurate snapshot as at 1 July 2025. GP Practice; Primary Care Network (PCN); Sub Integrated Care Board Locations (SICBL); Integrated Care Board (ICB) and NHS England Commissioning Region level data are released in single year of age (SYOA) and 5-year age bands, both of which finish at 95+, split by gender. In addition, organisational mapping data is available to derive PCN; SICBL; ICB and Commissioning Region associated with a GP practice and is updated each month to give relevant organisational mapping. Quarterly publications in January, April, July and October will include Lower Layer Super Output Area (LSOA) populations.

This dataset contains a summary measure of the Index of Multiple Deprivation 2010 at local authority district level. It puts the 326 Local Authority Districts into a rank order based the population weighted average rank of all LSOAs in the LAD. A rank of 1 is the most deprived.

The English Indices of Deprivation provide a relative measure of deprivation at small area level across England. Areas are ranked from least deprived to most deprived on seven different dimensions of deprivation and an overall composite measure of multiple deprivation. Most of the data underlying the 2010 indices are for the year 2008.

The Indices are designed for small areas, but one way of summarising relative deprivation at local authority level is by calculating the average rank of the LSOAs within it.

For the IMD and each domain, the summary measure is calculated by averaging all of the LSOA ranks in each local authority district. For the purpose of calculation, LSOAs are ranked such that the most deprived LSOA is given the rank of 32,482. The LSOA ranks are population weighted within a local authority district to take account of the fact that LSOA size can vary. (For simplicity in summarising the domains, the same total population size is used for all domains.) Finally the LADs are ranked according to the average rank of the LSOAs, from 1 to 326 where 1 is the most deprived.

The ‘Rank of average rank’ summary measure of for local authorities is also published for the IMD at: http://www.communities.gov.uk/documents/statistics/xls/1871689.xls.

Data for this publication are extracted each month as a snapshot in time from the Primary Care Registration database within the NHAIS (National Health Application and Infrastructure Services) system. This release is an accurate snapshot as at 1 September 2021. GP Practice; Primary Care Network (PCN); Sustainability and transformation partnership (STP); Clinical Commissioning Group (CCG) and NHS England Commissioning Region level data are released in single year of age (SYOA) and 5-year age bands, both of which finish at 95+, split by gender. In addition, organisational mapping data is available to derive STP; PCN; CCG and Commissioning Region associated with a GP practice and is updated each month to give relevant organisational mapping. Quarterly publications in January, April, July and October will include Lower Layer Super Output Area (LSOA) populations and a spotlight report. The outbreak of Coronavirus (COVID-19) has led to changes in the work of General Practices and subsequently the data within this publication. Until activity in this healthcare setting stabilises, we urge caution in drawing any conclusions from these data without consideration of the country's circumstances and would recommend that any uses of these data are accompanied by an appropriate caveat.