- Category: Water Feature
- Type: Island
- Latitude/Longitude: 52°0'52"N 5°5'25"W
- Eastings/Northings: 188027, 239644
- OS Grid: SM880396
- Mapcode Local: GBR CF.H608
- Mapcode Global: VH1QC.QM8G
Location and coordinates are for the approximate centre of March Mawr within this administrative area.
Geographic features and populated places may cross administrative borders.