SA18 3YP is located in the Llandybie electoral ward, within the unitary authority of Carmarthenshire and the Welsh Parliamentary constituency of Carmarthen East and Dinefwr. The Local Health Board is Hywel Dda University and the police force is Dyfed-Powys. This postcode has been in use since December 2017.


| Easting | 261991 |
| Northing | 214843 |
| Latitude | 51.815136 |
| Longitude | -4.003535 |
| Country | Wales |
| Postcode District | SA18 |
| Ward | Llandybie |
|---|---|
| Constituency | Carmarthen East And Dinefwr |
2, LLYS GWYNAN, LLANDYBIE, AMMANFORD, SA18 3YP 2022 1 FEB £359,800 |
2021 26 MAR £330,000 |
2019 20 DEC £328,580 |
2018 31 JAN £60,000 |
| Margaret Road (Ammanford Road) | Llandybie | 221m |
| Margaret Road (Ammanford Road) | Llandybie | 225m |
| Heol Marlais | Llandybie | 239m |
| Caecoed Estate (Heol Marlais) | Llandybie | 269m |
| Rugby Club (Heol Marlais) | Llandybie | 351m |
| Llandybie Station | 0.7km |
| Ammanford Station | 2.2km |
| Pantyffynnon Station | 4.1km |
| Percentage of properties with Next Generation Access | 100.0% |
| Percentage of properties with Superfast Broadband | 100.0% |
| Percentage of properties with Ultrafast Broadband | 0.0% |
| Percentage of properties with Full Fibre Broadband | 0.0% |
Superfast Broadband is between 30Mbps and 300Mbps
Ultrafast Broadband is > 300Mbps
| Percentage of properties unable to receive 2Mbps | 0.0% |
| Percentage of properties unable to receive 5Mbps | 0.0% |
| Percentage of properties unable to receive 10Mbps | 0.0% |
| Percentage of properties unable to receive 30Mbps | 0.0% |



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| Last Collection | |||
|---|---|---|---|
| Location | Mon-Fri | Sat | Distance |
| Woodfield Road | 16:45 | 11:00 | 328m |
| Glynhir Road | 17:00 | 11:30 | 373m |
| Llandybie P O | 17:00 | 11:30 | 674m |
The below table lists the International Territorial Level (ITL) codes (formerly Nomenclature of Territorial Units for Statistics (NUTS) codes) and Local Administrative Units (LAU) codes for SA18 3YP:
| ITL 1 Code | Name |
|---|---|
| TLL | Wales |
| ITL 2 Code | Name |
| TLL1 | West Wales and The Valleys |
| ITL 3 Code | Name |
| TLL14 | South West Wales |
| LAU 1 Code | Name |
| W06000010 | Carmarthenshire |
The below table lists the Census Output Area (OA), Lower Layer Super Output Area (LSOA), and Middle Layer Super Output Area (MSOA) for SA18 3YP:
| Code | Name | |
|---|---|---|
| OA | W00003669 | |
| LSOA | W01000681 | Carmarthenshire 011B |
| MSOA | W02000152 | Carmarthenshire 011 |
| SA18 3YL | Gelly Road | 84m |
| SA18 3YH | Maidens Grove | 123m |
| SA18 3YA | Margaret Road | 159m |
| SA18 3YG | Ammanford Road | 189m |
| SA18 3YB | Margaret Road | 191m |
| SA18 2JY | Ammanford Road | 216m |
| SA18 3UY | Heol Marlais | 269m |
| SA18 3UG | Cae Coed | 271m |
| SA18 3YD | Rawlings Road | 276m |
| SA18 3UU | Cae Coed | 295m |