Aberffraw is a small village and community on the south west coast of the Isle of Anglesey (Welsh: Ynys Môn), in Wales, by the West Bank of the River Ffraw, at grid reference SH354693. The UK postcode begins LL63. Access by road is by way of the A4080 and the nearest rail station is Bodorgan. In the early Middle Ages Aberffraw was the capital of the Kingdom of Gwynedd from c.860 AD until c.1170. Under the eponymous Aberffraw Dynasty it came to be the most important political centre in medieval Wales. The Llys remained the symbolic throne of the Kings of Gwynedd from the 9th century to the 13th century. The Royal Annals of Edward I of England show the Llys was dismantled in 1315 to provide building materials for nearby Beaumaris Castle.
Aberffraw has a population of 599 of which 79.8% are able to speak Welsh (2001 Census). Attractions near Aberffraw village include Llyn Coron (a lake), Barclodiad y Gawres, a Neolithic burial chamber and the island of Cribinau with the 7th century church of Saint Cwyfan perched on top. The church still holds services in the summer and is sometimes used for weddings, with access by boat. The village has a sandy beach, which was awarded the Blue flag rural beach award in 2005, and is on the Anglesey Coastal Path. There is a post office in the village. St Beuno's Church, Aberffraw, dates from the 12th century and is a Grade II* listed building.
In Welsh mythology, Aberffraw features as the site of Branwen and Matholwch's wedding festival, where Efnysien maimed Matholwch's horses.