- Category: Water Feature
- Type: Island
- Latitude/Longitude: 51°57'0"N 5°11'46"W
- Eastings/Northings: 180448, 232783
- OS Grid: SM804327
- Mapcode Local: GBR C8.M9RQ
- Mapcode Global: VH0T7.W79W
Location and coordinates are for the approximate centre of Penclegyr within this administrative area.
Geographic features and populated places may cross administrative borders.