- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 51°29'48"N 3°18'28"W
- Eastings/Northings: 309296, 178338
- OS Grid: ST092783
- Mapcode Local: GBR HR.JYDJ
- Mapcode Global: VH6F4.MM1Z
Location and coordinates are for the approximate centre of St y-Nyll Ponds within this administrative area.
Geographic features and populated places may cross administrative borders.