Hirwaun is a village in Rhondda Cynon Taf, Wales.
It is situated within the CF44 postcode district, which is within the Aberdare post town.
CF44 is the only postcode district within the Aberdare post town.
The Aberdare post town is within the Cardiff postcode area.
Administrative Ward: Hirwaun
Administrative District: Rhondda Cynon Taf
Country: Wales
UK Parliament: Cynon Valley