# Biggest and smallest London boroughs by population (2025)

Croydon was the most populated of London’s 33 boroughs in 2025 (population estimate 410,085).

City of London was the least populated (15,631). The middle borough, Waltham Forest, had 283,713.

| Rank | Area | Population estimate |
| --- | --- | --- |
| 1 | [Croydon](https://openindex.co.uk/croydon) | 410,085 |
| 2 | [Barnet](https://openindex.co.uk/barnet) | 408,087 |
| 3 | [Ealing](https://openindex.co.uk/ealing) | 387,072 |
| 4 | [Newham](https://openindex.co.uk/newham) | 376,542 |
| 5 | [Brent](https://openindex.co.uk/brent) | 352,201 |
| 6 | [Wandsworth](https://openindex.co.uk/wandsworth) | 339,859 |
| 7 | [Bromley](https://openindex.co.uk/bromley) | 336,048 |
| 8 | [Tower Hamlets](https://openindex.co.uk/tower-hamlets) | 334,240 |
| 9 | [Enfield](https://openindex.co.uk/enfield) | 329,400 |
| 10 | [Hillingdon](https://openindex.co.uk/hillingdon) | 326,671 |
| 11 | [Redbridge](https://openindex.co.uk/redbridge) | 321,829 |
| 12 | [Lambeth](https://openindex.co.uk/lambeth) | 314,298 |
| 13 | [Southwark](https://openindex.co.uk/southwark) | 312,366 |
| 14 | [Greenwich](https://openindex.co.uk/greenwich) | 301,225 |
| 15 | [Lewisham](https://openindex.co.uk/lewisham) | 301,037 |
| 16 | [Hounslow](https://openindex.co.uk/hounslow) | 299,486 |
| 17 | [Waltham Forest](https://openindex.co.uk/waltham-forest) | 283,713 |
| 18 | [Havering](https://openindex.co.uk/havering) | 280,787 |
| 19 | [Harrow](https://openindex.co.uk/harrow) | 272,612 |
| 20 | [Hackney](https://openindex.co.uk/hackney) | 266,241 |
| 21 | [Haringey](https://openindex.co.uk/haringey) | 266,218 |
| 22 | [Bexley](https://openindex.co.uk/bexley) | 257,103 |
| 23 | [Barking and Dagenham](https://openindex.co.uk/barking-and-dagenham) | 238,295 |
| 24 | [Islington](https://openindex.co.uk/islington) | 224,551 |
| 25 | [Merton](https://openindex.co.uk/merton) | 218,891 |
| 26 | [Camden](https://openindex.co.uk/camden) | 216,658 |
| 27 | [Sutton](https://openindex.co.uk/sutton) | 213,972 |
| 28 | [Westminster](https://openindex.co.uk/westminster) | 212,367 |
| 29 | [Richmond upon Thames](https://openindex.co.uk/richmond-upon-thames) | 196,713 |
| 30 | [Hammersmith and Fulham](https://openindex.co.uk/hammersmith-and-fulham) | 190,216 |
| 31 | [Kingston upon Thames](https://openindex.co.uk/kingston-upon-thames) | 172,761 |
| 32 | [Kensington and Chelsea](https://openindex.co.uk/kensington-and-chelsea) | 145,734 |
| 33 | [City of London](https://openindex.co.uk/city-of-london) | 15,631 |

Source: Mid-year population estimates, ONS population estimates. Period: 2025. Period: 2025.

## Other rankings of this measure

- [UK](https://openindex.co.uk/rankings/population-estimate/uk)
- [England](https://openindex.co.uk/rankings/population-estimate/england)
- [Northern Ireland](https://openindex.co.uk/rankings/population-estimate/northern-ireland)
- [Scotland](https://openindex.co.uk/rankings/population-estimate/scotland)
- [Wales](https://openindex.co.uk/rankings/population-estimate/wales)
- [North East](https://openindex.co.uk/rankings/population-estimate/north-east)
- [North West](https://openindex.co.uk/rankings/population-estimate/north-west)
- [Yorkshire and The Humber](https://openindex.co.uk/rankings/population-estimate/yorkshire-and-the-humber)
- [East Midlands](https://openindex.co.uk/rankings/population-estimate/east-midlands)
- [West Midlands](https://openindex.co.uk/rankings/population-estimate/west-midlands)
- [East of England](https://openindex.co.uk/rankings/population-estimate/east-of-england)
- [South East](https://openindex.co.uk/rankings/population-estimate/south-east)
- [South West](https://openindex.co.uk/rankings/population-estimate/south-west)

- [The map](https://openindex.co.uk/map/population-estimate)
- [Source and method](https://openindex.co.uk/sources/population-estimate)

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/rankings/population-estimate/london.

Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it.

Snapshot 2026.10.9. The HTML page: https://openindex.co.uk/rankings/population-estimate/london