WA postcode area
The WA area holds 18 districts and 18,345 live postcodes; its largest place is St Helens.
| District | Live postcodes | Largest place with its centre there |
|---|---|---|
| WA1 | 776 | Warrington |
| WA2 | 924 | Winwick |
| WA3 | 1,519 | Golborne |
| WA4 | 1,439 | Grappenhall |
| WA5 | 1,320 | Great Sankey |
| WA6 | 979 | Frodsham |
| WA7 | 1,517 | Runcorn |
| WA8 | 1,589 | Widnes |
| WA9 | 1,312 | — |
| WA10 | 1,274 | St Helens |
| WA11 | 1,031 | Haydock |
| WA12 | 645 | Newton-le-Willows |
| WA13 | 492 | Lymm |
| WA14 | 1,131 | Altrincham |
| WA15 | 1,185 | Hale |
| WA16 | 1,191 | Knutsford |
| WA55 | 8 | — |
| WA88 | 13 | — |
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.