| Información general | |
|---|---|
| Nombre | Efailwen |
| Código postal | SA66 |
| Superficie | Carmarthenshire |
| País | Wales |
| Nombre | Lugar | Código postal |
|---|---|---|
| Altwen, Efailwen | Efailwen | SA66 7UU |
| Arfryn, Efailwen | Efailwen | SA66 7RP |
| Aron Aur, Efailwen | Efailwen | SA66 7XB |
| Awel y Foel, Efailwen | Efailwen | SA66 7UZ |
| Awel y Preselau, Efailwen | Efailwen | SA66 7UZ |
| Barnaby House, Efailwen | Efailwen | SA66 7UX |
| Blaenafon, Efailwen | Efailwen | SA66 7UT |
| Blaen Herber, Efailwen | Efailwen | SA66 7XA |
| Bro Beca, Efailwen | Efailwen | SA66 7UX |
| Brodawel, Efailwen | Efailwen | SA66 7XH |
| Bro Deirian, Efailwen | Efailwen | SA66 7XF |
| Brodyfed, Efailwen | Efailwen | SA66 7UY |
| Bro Efail, Efailwen | Efailwen | SA66 7XH |
| Bromeini, Efailwen | Efailwen | SA66 7XA |
| Bromerydd, Efailwen | Efailwen | SA66 7XG |
| Brynafon, Efailwen | Efailwen | SA66 7UT |
| Brynbedw, Efailwen | Efailwen | SA66 7UT |
| Brynglandy, Efailwen | Efailwen | SA66 7RS |
| Bryngwyn, Efailwen | Efailwen | SA66 7UT |
| Brynhaul, Efailwen | Efailwen | SA66 7XA |