Tanygrisiau is a village in Gwynedd, Wales.
It is situated within the LL41 postcode district, which is within the Blaenau Ffestiniog post town.
LL41 is the only postcode district within the Blaenau Ffestiniog post town.
The Blaenau Ffestiniog post town is within the Llandudno postcode area.
Administrative Ward: Bowydd and Rhiw
Administrative District: Gwynedd
Country: Wales
UK Parliament: Dwyfor Meirionnydd