Llanfrothen (Welsh pronunciationⓘ) is a hamlet and community in the county of Gwynedd, Wales, between the towns of Porthmadog and Blaenau Ffestiniog and is 108.1 miles (174.0 km) from Cardiff.

[3] Parc, a Grade II* Listed Building is within the community, as are the village of Garreg and the hamlet of Croesor.

The case became known as the Llanfrothen Burial Case [cy], and decision of the Divisional Court established the right of the family of a deceased nonconformist to have his body buried in the parish churchyard, by a Baptist minister, and without using the Anglican burial service.

[4] The parish is located at the edge of the high lands, immediately overlooking the salt marshes of Morfa Gwyllt.

The hymn writer Richard Jones (Cymro Gwyllt) (1772–1833) served as a Calvinistic Methodist minister in Llanfrothen, where he spent much of his life (he was from Llanystumdwy in Eifionydd).