- Category: Water Feature
- Type: Island
- Latitude/Longitude: 51°51'31"N 5°17'45"W
- Eastings/Northings: 173146, 222937
- OS Grid: SM731229
- Mapcode Local: GBR C4.T32M
- Mapcode Global: VH0TL.5J4X
Location and coordinates are for the approximate centre of Carreg Frân within this administrative area.
Geographic features and populated places may cross administrative borders.