SL4 postcode district
SL4 holds 1,376 live postcodes around Windsor, in Windsor and Maidenhead, Bracknell Forest, Buckinghamshire and 2 more council areas.
Towns and villages with their centre in SL4
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Windsor | Royal Borough of Windsor and Maidenhead | 31,560 |
| 2 | Old Windsor | Royal Borough of Windsor and Maidenhead | 7,168 |
| 3 | Eton | Royal Borough of Windsor and Maidenhead | 3,025 |
| 4 | Eton Wick | Royal Borough of Windsor and Maidenhead | 2,029 |
| 5 | Dorney | Buckinghamshire | 278 |
Wards
| Name | Share of postcodes |
|---|---|
| Eton & Castle | 35% |
| Old Windsor | 15% |
| Clewer & Dedworth West | 14% |
| Clewer East | 13% |
| Clewer & Dedworth East | 12% |
| Winkfield & Warfield East | 7% |
| Bray | 2% |
| Burnham | 1% |
| Ascot & Sunninghill | 0% |
| Englefield Green West | 0% |
And 1 more.
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Windsor | 89% |
| Maidenhead | 9% |
| Beaconsfield | 1% |
| Slough | 0% |
Deprivation
The middle postcode here sits in decile 8 of the English Index of Multiple Deprivation (2021-Census LSOAs), where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 0% of this district's postcodes sit in the most deprived three deciles, 75% 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 SL area
SL0 · SL1 · SL2 · SL3 · SL5 · SL6 · SL7 · SL8 · SL9 · SL60 · SL95
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.