| Area/District | Active Postcodes |
| W1 | 1 |
| W10 | 1,132 |
| W11 | 1,603 |
| W12 | 1,690 |
| W13 | 1,082 |
| W14 | 1,306 |
| W1A | 2,795 |
| W1B | 545 |
| W1C | 208 |
| W1D | 945 |
| W1E | 1 |
| W1F | 991 |
| W1G | 896 |
| W1H | 1,371 |
| W1J | 941 |
| W1K | 1,169 |
| W1M | 761 |
| W1N | 684 |
| W1P | 731 |
| W1R | 813 |
| W1S | 866 |
| W1T | 1,219 |
| W1U | 1,511 |
| W1V | 849 |
| W1W | 847 |
| W1X | 750 |
| W1Y | 810 |
| W2 | 2,597 |
| W3 | 1,881 |
| W4 | 2,046 |
| W5 | 2,038 |
| W6 | 1,576 |
| W7 | 841 |
| W8 | 1,472 |
| W9 | 1,254 |