Mynydd Llandygai is a village in Gwynedd, Wales.
It is situated within the LL57 postcode district, which is within the Bangor post town.
LL57 is the only postcode district within the Bangor post town.
The Bangor post town is within the Llandudno postcode area.
Administrative Ward: Tregarth & Mynydd Llandygai
Administrative District: Gwynedd
Country: Wales
UK Parliament: Arfon