Brithdir is a village in Gwynedd, Wales.
It is situated within the LL40 postcode district, which is within the Dolgellau post town.
LL40 is the only postcode district within the Dolgellau post town.
The Dolgellau post town is within the Llandudno postcode area.
Administrative Ward: Brithdir and Llanfachreth/Ganllwyd/Llanelltyd
Administrative District: Gwynedd
Country: Wales
UK Parliament: Dwyfor Meirionnydd