Cwmdu is a village in Powys, Wales.
It is situated within the NP8 postcode district, which is within the Crickhowell post town.
The full list of postcode districts within the Crickhowell post town is as follows:
The Crickhowell post town is within the Newport postcode area.
Administrative Ward: Bwlch
Administrative District: Powys
Country: Wales
UK Parliament: Brecon and Radnorshire