Llanymawddwy is a village in Gwynedd, Wales, which is to the north of the larger village of Dinas Mawddwy, on the minor road which connects Dinas Mawddwy to Llanuwchllyn over Bwlch y Groes. The most notable building is St. Tydecho Church, where the tradition of singing Matins endures.
Alfred George Edwards, the the first Archbishop of the disestablished Church in Wales, was born in Llanymawddwy in 1848.