Cwm Boi, Rhondda, Cynon, Taff

• Built-Up Area: Fernhill
• Parish/Community: Mountain Ash
• Unitary Authority: Rhondda, Cynon, Taff
• Region: Wales

• Category: Geographic Feature
• Type: Valley

• Latitude/Longitude: 51°41'2"N 3°24'16"W
• Eastings/Northings: 303003, 199299
• OS Grid: ST030992
• Mapcode Local: GBR HM.54CK
• Mapcode Global: VH6D3.YX1V

Location and coordinates are for the approximate centre of Cwm Boi within this administrative area. Geographic features and populated places may cross administrative borders.