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The Mayor of London The London Assembly


London is home to an estimated 8.8 million people, making it the largest city in the UK. It is also a highly diverse city, with over 3.5 million residents born outside the UK.

Population Projections 

Greater London Authority

The GLA produce population projections at local authority and ward level by age and sex. These are updated annually.


Greater London Authority

Estimates of London’s population, broken down by individual characteristics including age, ethnicity and socio-economic position.

Census Information Scheme

Greater London Authority

The Census Information Scheme, working within the Greater London Authority, provides London-specific analysis of census statistics.

London Output Area Classification

Greater London Authority

An open source geospatial classification, the London Output Area Classification uses a combination of over 60 Census variables to classify every single small area in London.

Indices of Deprivation 2019

Greater London Authority

A GLA Intelligence briefing giving information about the components of the Indices of Deprivation, how they are constructed and an analysis of the results for London.

Indices of Deprivation 2019 Initial Analysis

Greater London Authority

Analysis blog presenting key findings for London from the 2019 edition of the Indices of Deprivation.

How many undocumented children live in London?

University of Wolverhampton

This summary report aims to provide robust, evidence-based estimates of the size of the undocumented population in London and the UK. This research was commissioned through the Mayor of London’s Citizenship and Integration Initiative and undertaken by the Institute for Community Research and Development at the University of Wolverhampton.

Demographic impact of Covid-19 briefing

Greater London Authority

This briefing brings together a range of data published on the demographic impact of Covid-19, to understand how the city has been affected, covering what is known about Covid-19 cases and mortality.