- Category: Populated Place
- Type: Hamlet
- Latitude/Longitude: 50°4'21"N 5°33'46"W
- Eastings/Northings: 145156, 25249
- OS Grid: SW451252
- Mapcode Local: GBR DXNH.6NF
- Mapcode Global: VH05P.JFFP
Location and coordinates are for the approximate centre of Castallack within this administrative area.
Geographic features and populated places may cross administrative borders.