Coordinates: 52°11′38″N 4°18′25″W / 52.194°N 4.307°W
Llanarth is a small village in Ceredigion, Wales, located on the A487 between Aberystwyth and Cardigan within three miles of both Aberaeron and New Quay.
In Llanarth, there is a petrol station, post office, a primary school, a public house (the Llanina Arms), a butcher, a Spar convenience store and a garden centre.
The parish church of St David's, once dedicated to St Fylltyg, is a grade II* listed building. It was renovated in 1872. 
Dafydd Jones, Welsh rugby international and Llanelli Scarlets player was brought up in Llanarth.
Daniel Lewis Lloyd, Bishop of Bangor, is buried in St David's churchyard, Llanarth.