Llyn Cefni
| Llyn Cefni | |
|---|---|
The eastern side | |
| Location | Anglesey, Wales |
| Coordinates | 53°16′16″N 4°20′8″W / 53.27111°N 4.33556°W |
| Type | Reservoir |
| Primary outflows | Afon Cefni |
| Basin countries | United Kingdom |
| Max. length | 2.3 km (1.4 mi) |
| Surface area | 86 ha (210 acres) |
| Water volume | 400 million imperial gallons (1.8 hm3; 1,500 acre⋅ft) |
Llyn Cefni is a small reservoir in the centre of Anglesey, Wales which is managed by Welsh Water and Hamdden Ltd, while the fishery is managed by the Cefni Angling Association. The reservoir is located just 1 kilometre (0.6 mi) northwest of the island's county town of Llangefni.