| Llandanwg | |
|---|---|
 Llandanwg (left) and Llanfair (right, on the hill) | |
  Llandanwg Location within Gwynedd | |
| OS grid reference | SH570285 |
| Community | |
| Principal area | |
| Preserved county | |
| Country | Wales |
| Sovereign state | United Kingdom |
| Post town | HARLECH |
| Postcode district | LL46 |
| Dialling code | 01341 |
| Police | North Wales |
| Fire | North Wales |
| Ambulance | Welsh |
| UK Parliament | |
| Senedd Cymru – Welsh Parliament | |
Llandanwg () is a village in the Llanfair community of the Ardudwy area of Gwynedd, Wales. Situated on the coast, it has a railway station and a Grade II listed medieval church.