Llanwrtyd is a small settlement in Powys, mid-Wales, giving its name to a community, in the historic county of Brecknockshire (Breconshire), through which flows the River Irfon. It lies 1.5 miles north of the town of Llanwrtyd Wells. Llanwrtyd was historically the centre of a much larger parish which included Llanwrtyd Wells. The name Llanwrtyd is shared with the ancient parish, and is also sometimes applied to Llanwrtyd Wells (particularly in Welsh). The current community includes Llanwrtyd Wells and Abergwesyn.