- Category: Populated Place
- Type: Village
- Latitude/Longitude: 51°55'21"N 4°56'22"W
- Eastings/Northings: 197957, 228983
- OS Grid: SM979289
- Mapcode Local: GBR CM.P1DB
- Mapcode Global: VH1QV.BYG0
Location and coordinates are for the approximate centre of Castell-newydd-bach within this administrative area.
Geographic features and populated places may cross administrative borders.