| Country: | Wales |
| Official Name: | Cemlyn |
| Static Image Name: | Plas Cemlyn farmhouse - geograph.org.uk - 1314688.jpg |
| Static Image Width: | 250px |
| Coordinates: | 53.4056°N -4.5128°W |
| Unitary Wales: | Anglesey |
| Lieutenancy Wales: | Gwynedd |
| Constituency Westminster: | Ynys Môn |
| Constituency Welsh Assembly: | Ynys Môn |
Cemlyn is a village in Anglesey, in north-west Wales. It lies near Cemlyn Bay. It is in the community of Cylch-y-Garn.