The approximate coverage of the postcode districts:
| Postcode district | Post town | Coverage | Local authority area |
|---|---|---|---|
| HA0 | WEMBLEY | Alperton, Sudbury, Sudbury Hill, Wembley Central and North Wembley | Brent, Harrow |
| HA1 | HARROW | Harrow, Harrow on the Hill, North Harrow, Northwick Park | Harrow, Brent |
| HA2 | HARROW | North Harrow, South Harrow, Rayners Lane (part) | Harrow |
| HA3 | HARROW | Harrow Weald, Kenton, Wealdstone, Queensbury, Belmont (part) | Harrow, Brent |
| HA4 | RUISLIP | Ruislip | Hillingdon |
| HA5 | PINNER | Pinner, Eastcote, Hatch End, Rayners Lane (part), Carpenders Park (part) | Harrow, Hillingdon, Three Rivers |
| HA6 | NORTHWOOD | Northwood, Moor Park | Hillingdon, Three Rivers |
| HA7 | STANMORE | Stanmore, Queensbury, Belmont (part) | Harrow |
| HA8 | EDGWARE | Edgware, Canons Park, Queensbury | Barnet, Brent, Harrow |
| HA9 | WEMBLEY | Wembley, Wembley Park, Wembley Central (East), Preston, Tokyngton | Brent |
Read more about this topic: HA Postcode Area