| Country: | Wales |
| Official Name: | Tre-Ysgawen |
| Coordinates: | 53.3038°N -4.3274°W |
| Cardiff Distance Mi: | 135 |
| Cardiff Distance Km: | 217.3 |
| London Distance Mi: | 216.2 |
| London Distance Km: | 347.9 |
| Community Wales: | Llanddyfnan |
| Unitary Wales: | Anglesey |
| Constituency Welsh Assembly: | Ynys Môn |
| Constituency Westminster: | Ynys Môn |
| Post Town: | Llangefni |
| Postcode District: | LL77 |
| Os Grid Reference: | SH 4501 8107 |
Tre-Ysgawen is a hamlet in the community of Llanddyfnan, Anglesey, Wales, which is 135 miles (217.3 km) from Cardiff and 216.2 miles (347.9 km) from London.[1]
The name comes from the Welsh language: "Tre" meaning "homestead" and "ysgawen": "the elder tree".