Tonfanau is a village in Gwynedd, Wales.
It is situated within the LL36 postcode district, which is within the Tywyn post town.
LL36 is the only postcode district within the Tywyn post town.
The Tywyn post town is within the Llandudno postcode area.
Administrative Ward: Llangelynin
Administrative District: Gwynedd
Country: Wales
UK Parliament: Dwyfor Meirionnydd