| Area/District | Active Postcodes |
| LS1 | 1,678 |
| LS10 | 1,270 |
| LS11 | 1,548 |
| LS12 | 1,743 |
| LS13 | 1,159 |
| LS14 | 1,274 |
| LS15 | 1,205 |
| LS16 | 1,400 |
| LS17 | 1,781 |
| LS18 | 694 |
| LS19 | 852 |
| LS2 | 756 |
| LS20 | 472 |
| LS21 | 873 |
| LS22 | 1,134 |
| LS23 | 529 |
| LS24 | 526 |
| LS25 | 1,436 |
| LS26 | 1,025 |
| LS27 | 1,457 |
| LS28 | 1,511 |
| LS29 | 1,672 |
| LS3 | 228 |
| LS4 | 309 |
| LS5 | 275 |
| LS6 | 1,339 |
| LS7 | 1,133 |
| LS8 | 1,438 |
| LS88 | 62 |
| LS9 | 1,317 |
| LS98 | 10 |
| LS99 | 59 |