Llandrillo is a village in Denbighshire, Wales.
It is situated within the LL21 postcode district, which is within the Corwen post town.
LL21 is the only postcode district within the Corwen post town.
The Corwen post town is within the Llandudno postcode area.
Administrative Ward: Llandrillo
Administrative District: Denbighshire
Country: Wales
UK Parliament: Clwyd South