HA postcode area
The HA area holds 10 districts and 10,255 live postcodes; its largest place is Brent.
| District | Live postcodes | Largest place with its centre there |
|---|---|---|
| HA0 | 860 | Brent |
| HA1 | 960 | Harrow |
| HA2 | 966 | — |
| HA3 | 1,262 | Wealdstone |
| HA4 | 1,137 | Ruislip |
| HA5 | 1,094 | Pinner |
| HA6 | 721 | Northwood |
| HA7 | 847 | Belmont |
| HA8 | 1,402 | Edgwarebury |
| HA9 | 1,006 | Wembley |
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.