SA postcode area
The SA area holds 53 districts and 23,295 live postcodes; its largest place is Swansea.
| District | Live postcodes | Largest place with its centre there |
|---|---|---|
| SA1 | 1,300 | Swansea |
| SA2 | 773 | Dunvant |
| SA3 | 727 | Bishopston |
| SA4 | 1,150 | Gorseinon |
| SA5 | 746 | — |
| SA6 | 763 | Clydach |
| SA7 | 349 | — |
| SA8 | 306 | — |
| SA9 | 554 | Ystalyfera |
| SA10 | 777 | Seven Sisters |
| SA11 | 989 | Neath |
| SA12 | 788 | Cwmafan |
| SA13 | 562 | Taibach |
| SA14 | 886 | Cross Hands |
| SA15 | 1,015 | Llanelli |
| SA16 | 261 | Burry Port |
| SA17 | 429 | Kidwelly |
| SA18 | 772 | Ammanford |
| SA19 | 826 | Llandeilo |
| SA20 | 237 | Llandovery |
| SA31 | 580 | Carmarthen |
| SA32 | 399 | Nantgaredig |
| SA33 | 642 | Saint Clears |
| SA34 | 232 | Glandwr |
| SA35 | 42 | — |
| SA36 | 11 | Glogue |
| SA37 | 59 | — |
| SA38 | 189 | Newcastle Emlyn |
| SA39 | 117 | Pencader |
| SA40 | 107 | — |
| SA41 | 112 | Crymych |
| SA42 | 156 | Newport |
| SA43 | 561 | Cardigan |
| SA44 | 668 | Llangeler |
| SA45 | 94 | New Quay |
| SA46 | 130 | Aberaeron |
| SA47 | 73 | Llanarth |
| SA48 | 378 | Lampeter |
| SA61 | 459 | Haverfordwest |
| SA62 | 1,007 | Johnston |
| SA63 | 88 | Clarbeston Road |
| SA64 | 105 | Goodwick |
| SA65 | 200 | Fishguard |
| SA66 | 164 | Maenclochog |
| SA67 | 363 | Narberth |
| SA68 | 154 | Kilgetty |
| SA69 | 157 | Saundersfoot |
| SA70 | 425 | Tenby |
| SA71 | 407 | Pembroke |
| SA72 | 306 | Pembroke Dock |
| SA73 | 629 | Milford Haven |
| SA80 | 6 | — |
| SA99 | 65 | — |
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.