BL4 postcode district
BL4 holds 850 live postcodes around Farnworth, in Bolton.
Towns and villages with their centre in BL4
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Farnworth | Borough of Bolton | 25,680 |
| 2 | Kearsley | Borough of Bolton | 10,127 |
Wards
| Name | Share of postcodes |
|---|---|
| Farnworth South | 40% |
| Farnworth North | 34% |
| Kearsley | 25% |
| Hulton | 2% |
| Horwich South & Blackrod | 0% |
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Bolton South and Walkden | 98% |
| Bolton West | 2% |
Deprivation
The middle postcode here sits in decile 2 of the English Index of Multiple Deprivation (2021-Census LSOAs), where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 84% of this district's postcodes sit in the most deprived three deciles, 2% in the least deprived three.
Deprivation deciles describe the LSOA neighbourhood each postcode sits in, weighted by postcodes rather than by people, because the postcode file carries no population. A district where the deprived neighbourhoods are densely populated will read better here than it would per resident.
Neighbouring districts in the BL area
BL0 · BL1 · BL2 · BL3 · BL5 · BL6 · BL7 · BL8 · BL9 · BL11 · BL78
Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Postcode data is the ONS Postcode Directory, August 2026 edition; counts are live postcodes with a usable location. Northern Ireland postcodes carry a separate licence and are not included; Scotland joins when the site's Scottish coverage does.