Districts in the W area
| District | Main place | Local authority | Sectors | Postcodes |
|---|---|---|---|---|
| W1A | London | Islington | 10 | 141 |
| W1B | City of Westminster | Westminster | 5 | 297 |
| W1C | City of Westminster | Westminster | 2 | 141 |
| W1D | City of Westminster | Westminster | 7 | 698 |
| W1F | City of Westminster | Westminster | 4 | 754 |
| W1G | City of Westminster | Westminster | 5 | 703 |
| W1H | City of Westminster | Westminster | 6 | 691 |
| W1J | City of Westminster | Westminster | 6 | 666 |
| W1K | City of Westminster | Westminster | 7 | 878 |
| W1S | City of Westminster | Westminster | 4 | 554 |
| W1T | London | Camden | 7 | 922 |
| W1U | City of Westminster | Westminster | 8 | 1,070 |
| W1W | City of Westminster | Westminster | 4 | 621 |
| W2 | City of Westminster | Westminster | 7 | 1,125 |
| W3 | Acton | Ealing | 6 | 1,158 |
| W4 | London | Hounslow | 6 | 1,024 |
| W5 | Ealing | Ealing | 6 | 1,007 |
| W6 | Hammersmith | Hammersmith and Fulham | 5 | 773 |
| W7 | London | Ealing | 4 | 510 |
| W8 | Kensington | Kensington and Chelsea | 5 | 688 |
| W9 | City of Westminster | Westminster | 4 | 578 |
| W10 | Kensington | Kensington and Chelsea | 4 | 692 |
| W11 | Kensington | Kensington and Chelsea | 5 | 733 |
| W12 | London | Hammersmith and Fulham | 6 | 820 |
| W13 | Ealing | Ealing | 4 | 595 |
| W14 | Kensington | Hammersmith and Fulham | 4 | 641 |