Garndiffaith is a village in Torfaen, Wales.
It is situated within the NP4 postcode district, which is within the Pontypool post town.
NP4 is the only postcode district within the Pontypool post town.
The Pontypool post town is within the Newport postcode area.
Administrative Ward: Abersychan
Administrative District: Torfaen
Country: Wales
UK Parliament: Torfaen