HA1 postcode district
HA1 holds 960 live postcodes around Harrow, in Harrow, Brent.
Towns and villages with their centre in HA1
| # | Place | County / council | Population |
|---|---|---|---|
| 1 | Harrow | Greater London | 149,246 |
| 2 | Headstone | Greater London | 14,900 |
| 3 | Harrow on the Hill | Greater London | 10,632 |
| 4 | Greenhill | Greater London | 9,324 |
Wards
| Name | Share of postcodes |
|---|---|
| Greenhill | 29% |
| Marlborough | 24% |
| Harrow on the Hill | 20% |
| Headstone | 13% |
| West Harrow | 7% |
| Northwick Park | 5% |
| North Harrow | 2% |
Westminster constituencies
| Name | Share of postcodes |
|---|---|
| Harrow West | 95% |
| Brent West | 5% |
Deprivation
The middle postcode here sits in decile 5 of the English Index of Multiple Deprivation (2021-Census LSOAs), where decile 1 is the most deprived tenth of neighbourhoods and 10 the least. 19% of this district's postcodes sit in the most deprived three deciles, 8% 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 HA area
HA0 · HA2 · HA3 · HA4 · HA5 · HA6 · HA7 · HA8 · HA9
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.