- Category: Populated Place
- Type: Town
- Latitude/Longitude: 51°38'28"N 3°14'10"W
- Eastings/Northings: 314545, 194330
- OS Grid: ST145943
- Mapcode Local: GBR HV.7YF3
- Mapcode Global: VH6DL.V0GM
Location and coordinates are for the approximate centre of Ystrad Mynach within this administrative area.
Geographic features and populated places may cross administrative borders.