| Country: | Wales |
| Official Name: | Llanfair-yng-Nghornwy |
| Static Image: | Llanfairynghornwy Post Office and the former Capel Nebo - geograph.org.uk - 1239085.jpg |
| Coordinates: | 53.3919°N -4.5517°W |
| Community Wales: | Cylch-y-Garn |
| Unitary Wales: | Anglesey |
| Lieutenancy Wales: | Gwynedd |
| Constituency Westminster: | Ynys Môn |
| Constituency Welsh Assembly: | Ynys Môn |
| Post Town: | Holyhead |
| Postcode District: | LL65 4 |
| Postcode Area: | LL65 4 |
| Dial Code: | 01407 730 |
Llanfair-yng-Nghornwy is a village in Anglesey, in north-west Wales.[1]