| Aberllefenni | |
|---|---|
 Pensarn Terrace | |
  Aberllefenni Location within Gwynedd | |
| OS grid reference | SH770097 |
| Community | |
| Principal area |
|
| Preserved county |
|
| Country | Wales |
| Sovereign state | United Kingdom |
| Post town | MACHYNLLETH |
| Postcode district | SY20 |
| Dialling code | 01654 |
| Police | North Wales |
| Fire | North Wales |
| Ambulance | Welsh |
| UK Parliament | |
| Senedd Cymru – Welsh Parliament | |
Aberllefenni is a village in the south of Gwynedd, Wales. It lies in the historic county of Merionethshire, in the valley of the Afon Dulas, and in the community of Corris.