Maenaddfwyn is a village in Anglesey, Wales.
It is situated within the LL71 postcode district, which is within the Llanerchymedd post town.
LL71 is the only postcode district within the Llanerchymedd post town.
The Llanerchymedd post town is within the Llandudno postcode area.
Administrative Ward: Llanddyfnan
Administrative District: Isle of Anglesey
Country: Wales
UK Parliament: Ynys Môn