| Country: | Wales |
| Official Name: | Llechgynfarwy |
| Coordinates: | 53.3025°N -4.4309°W |
| Cardiff Distance Mi: | 136.5 |
| Cardiff Distance Km: | 219.7 |
| London Distance Mi: | 219.7 |
| London Distance Km: | 353.5 |
| Community Wales: | Tref Alaw |
| Unitary Wales: | Anglesey |
| Constituency Welsh Assembly: | Ynys Môn |
| Constituency Westminster: | Ynys Môn |
| Post Town: | Caergybi |
| Postcode District: | LL65 |
| Os Grid Reference: | SH 3811 8115 |
Llechgynfarwy (or Llechcynfarwy) is a hamlet in the community of Tref Alaw, Anglesey, Wales, which is 136.5 miles (219.7 km) from Cardiff and 219.7 miles (353.5 km) from London. It is the location of St Cynfarwy's Church.