The Afon Lliedi is a river flowing through the Lliedi Valley in Carmarthenshire, South Wales. This Welsh waterway drains into the broader network of rivers characteristic of the region, passing through a landscape shaped by the industrial and agricultural heritage of southwest Wales. The river is perhaps best known locally in connection with the Cwm Lliedi Reservoir, which it feeds, and it offers a modest but rewarding fishery for anglers seeking a quieter, more intimate river experience in the Welsh countryside.