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An overview of best-fitting: Building 2011 Census estimates from output areas (OAs)

Best-fitting is the method used to produce estimates for any output geography, by aggregating statistical building blocks, even where these may be nested within a higher geography. It is the method...

An overview of best-fitting: Building 2021 Census estimates from output areas (OAs)

Best-fitting is the method used to produce estimates for any output geography, by aggregating statistical building blocks, even where these may be nested within a higher geography. It is the method...

Indicative Parish Population estimates

Indicative parish population estimates derived from ONS mid-2018 small area population estimates, using best-fit aggregation. Indicative parish population estimates derived from ONS mid-2018 small...

Lower Layer Super Output Area (2001) to Ward (2009) Lookup in England and Wales

A best-fit lookup between 2001 lower layer super output areas (LSOA) and electoral wards/divisions as at 31 December 2009.  (File Size - 2 MB).For more information and an overview of...

Lower Layer Super Output Area (2001) to Ward (2008) Lookup in England and Wales

A best-fit lookup between 2001 lower layer super output areas (LSOA) and electoral wards/divisions as at 31 December 2008.  (File Size - 2 MB).For more information and an overview of...

Lower Layer Super Output Area (2011) to Ward (2015) Lookup in England and Wales

A best-fit lookup between 2011 Lower Layer Super Output Areas (LSOA) and 2015 electoral wards (WD) as at 31 December 2015.  (File Size - 6 MB)  For more information and an overview of...

Lower Layer Super Output Area (2001) to Ward (2007) Lookup in England and Wales

A best-fit lookup between 2001 lower layer super output areas (LSOA) and electoral wards/divisions as at 31 December 2007.  (File Size - 2 MB)For more information and an overview of...

Lower Layer Super Output Area (2001) to Ward (2002) Lookup in England and Wales

A best-fit lookup between 2001 lower layer super output areas (LSOA) and electoral wards/divisions as at 31 December 2002.  (File Size - 2 MB)For more information and an overview of...

Lower Layer Super Output Area (2001) to Ward (2011) Lookup in England and Wales

A best-fit lookup between lower layer super output areas (LSOA) and electoral wards/divisions as at 31 December 2011.  (File Size - 2 MB).For more information and an overview of best-fitting...

Lower Layer Super Output Area (2001) to Ward (2005) Lookup in England and Wales

A best-fit lookup between 2001 lower layer super output areas (LSOA) and electoral wards/divisions as at 31 December 2005.  (File Size - 2 MB)For more information and an overview of...

Lower Layer Super Output Area (2001) to Ward (2006) Lookup in England and Wales

A best-fit lookup file between 2001 lower layer super output areas (LSOA) and electoral wards/divisions as at 31 December 2006.  (File Size - 2 MB)For more information and an overview of...

Indicative parish population estimates derived from ONS mid-2018

Indicative parish population estimates derived from ONS mid-2018 small area population estimates, using best-fit aggregation, with estimates provided in broad age groups. Please note that these...

Output Area (2011) to NAWC (2011) to NAWER (December 2011) Best Fit Lookup in WA

A best fit lookup between output areas and National Assembly for Wales constituencies (NAWC) and National Assembly for Wales electoral regions (NAWER) as at 31 December 2011 in Wales. The...

National Statistics Postcode Lookup - 2011 Census (February 2024) for the UK

This file contains the National Statistics Postcode Lookup (NSPL) for the United Kingdom as at February 2024 in Comma Separated Variable (CSV) and ASCII text (TXT) formats. To download the zip file...

Postcode to OA (2011) to LSOA to MSOA to LAD (December 2011) Best Fit Lookup in EW

A best-fit lookup between enumeration postcodes, Output Areas (OA), Lower Layer Super Output Areas (LSOA), Middle Layer Super Output Areas (MSOA) and local authority districts (LAD) as at 31...

Postcode to OA (2021) to LSOA to MSOA to LAD (August 2025) Best Fit Lookup in the UK

A best-fit lookup between postcodes, 2021 Census Output Areas (OA), Lower Layer Super Output Areas (LSOA), Middle Layer Super Output Areas (MSOA) and local authority districts (LAD). Postcodes are...

Postcode to OA (2021) to LSOA to MSOA to LAD (November 2025) Best Fit Lookup in the UK

A best-fit lookup between postcodes, 2021 Census Output Areas (OA), Lower Layer Super Output Areas (LSOA), Middle Layer Super Output Areas (MSOA) and local authority districts (LAD). Postcodes are...

Postcode to OA (2021) to LSOA to MSOA to LAD (February 2024) Best Fit Lookup in the UK

A best-fit lookup between postcodes, 2021 Census Output Areas (OA), Lower Layer Super Output Areas (LSOA), Middle Layer Super Output Areas (MSOA) and local authority districts (LAD). Postcodes are...

National Statistics Postcode Lookup - 2021 Census (May 2024) for the UK

This file contains the National Statistics Postcode Lookup (NSPL) for the United Kingdom as at May 2024 in Comma Separated Variable (CSV) and ASCII text (TXT) formats. To download the zip file...

National Statistics Postcode Lookup (August 2025) for the UK

This file contains the National Statistics Postcode Lookup (NSPL) for the United Kingdom as at August 2025 in Comma Separated Variable (CSV) and ASCII text (TXT) formats. To download the zip file...