Mawddwy is a community in the county of Gwynedd, Wales, and is 88.3 miles (142.2 km) from Cardiff and 172.8 miles (278.0 km) from London. In 2011 the population of Mawddwy was 603 with 59.5% of them able to speak Welsh. In the cantref of Cynan, lies the village of Mallwyd, "delightfully situated between the salient angles of three abrupt mountains", near the old boundary between the counties of Merionethshire and Montgomeryshire. Dr. John Davies lived here in the mid-seventeenth century; he was involved with Bishop Parry of St Asaph in the translation of the bible into the Welsh language.