Blaencwm is a village in Rhondda Cynon Taf, Wales.
It is situated within the CF42 postcode district, which is within the Treorchy post town.
CF42 is the only postcode district within the Treorchy post town.
The Treorchy post town is within the Cardiff postcode area.
Administrative Ward: Treherbert
Administrative District: Rhondda Cynon Taf
Country: Wales
UK Parliament: Rhondda