| District | Post Town | Coverage | Postcodes |
|---|---|---|---|
| TW1 | Twickenham | Twickenham, St. Margarets, Strawberry Hill | 675 |
| TW2 | Twickenham | Whitton, Strawberry Hill | 551 |
| TW3 | Hounslow | Hounslow, Maswell Park, Lampton | 783 |
| TW4 | Hounslow | Hounslow West, Hounslow Heath, Whitton | 425 |
| TW5 | Hounslow | Heston | 400 |
| TW6 | Hounslow | Heathrow | 126 |
| TW7 | Isleworth | Isleworth, Osterley | 765 |
| TW8 | Brentford | Brentford | 527 |
| TW9 | Richmond | North Sheen, Kew | 604 |
| TW10 | Richmond | Ham, Petersham | 512 |
| TW11 | Teddington | Teddington | 560 |
| TW12 | Hampton | Hampton | 566 |
| TW13 | Feltham | Feltham, Hanworth | 697 |
| TW14 | Feltham | Hatton | 474 |
| TW15 | Ashford | Ashford | 664 |
| TW16 | Sunbury-on-Thames | Sunbury-on-thames | 537 |
| TW17 | Shepperton | Shepperton | 413 |
| TW18 | Staines-upon-Thames | Staines, Egham Hythe | 738 |
| TW19 | Staines-upon-Thames | Stanwell, Wraysbury | 386 |
| TW20 | Egham | Egham, Englefield Green | 656 |