TW postcode area
The TW area holds 20 districts and 11,062 live postcodes; its largest place is Hounslow.
| District | Live postcodes | Largest place with its centre there |
|---|---|---|
| TW1 | 665 | — |
| TW2 | 558 | — |
| TW3 | 787 | Hounslow |
| TW4 | 428 | — |
| TW5 | 400 | Heston |
| TW6 | 124 | — |
| TW7 | 760 | Isleworth |
| TW8 | 539 | Brentford |
| TW9 | 597 | Richmond |
| TW10 | 515 | — |
| TW11 | 557 | Hampton Wick |
| TW12 | 562 | Hampton |
| TW13 | 692 | Feltham |
| TW14 | 476 | — |
| TW15 | 657 | Ashford |
| TW16 | 538 | Sunbury-on-Thames |
| TW17 | 417 | Shepperton |
| TW18 | 748 | Staines |
| TW19 | 386 | Stanwell |
| TW20 | 656 | Egham |
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.