The Tudors of Penmynydd were a noble and aristocratic family, connected with the village of Penmynydd in Anglesey, North Wales, who were very influential in Welsh politics. From this family arose Sir Owen Tudor and thereby the Tudor dynasty, that ruled the Kingdom of England from 1485 to 1603. The Tudor dynasty ended in the early 17th century with the death of Elizabeth I.

Penmynydd, meaning "top of the mountain" in Welsh, is a village and community on Anglesey, Wales. It is known for being the birthplace of the Tudors of Penmynydd, which became the House of Tudor. The population according to the United Kingdom Census 2011 was 465. The community includes the village of Star and the hamlet of Castellior.