Mynachlog-ddu is a village in Pembrokeshire, Wales.
It is situated within the SA66 postcode district, which is within the Clynderwen post town.
SA66 is the only postcode district within the Clynderwen post town.
The Clynderwen post town is within the Swansea postcode area.
Administrative Ward: Maenclochog
Administrative District: Pembrokeshire
Country: Wales
UK Parliament: Preseli Pembrokeshire