Pumsaint is a village in Carmarthenshire, Wales, halfway between Llanwrda and Lampeter on the A482 in the valley of Afon Cothi. It forms part of the extensive estate of Dolaucothi, which is owned by the National Trust.
thumb|150px|Carreg Pumsaint
thumb|A miner underground at Pumsaint gold mine [[Wales; ?.]]
The name is Welsh for "five saints" (pump being the word for "five"). The name is derived from the stone block at the nearby gold mines, opposite Ogofau Lodge, which has four sides, each of which has hollows probably caused by pestle impacts. It was used as an anvil for crushing gold ore in the Roman period. Excavations in the 1990s of the area adjacent to the stone showed that the stone was originally horizontal and used as an anvil for a water-powered crushing mill. There are many parallels from Spanish mines of the Roman period with similar stone anvils.
Places of interest
thumb|left|320px|Map of the gold mine
thumb|Miners at Pumsaint gold mine, 1938
The nearby conservation area has several scheduled ancient monuments including the Dolaucothi Gold Mines. Archaeologists have uncovered evidence of Roman occupation of the area, including Roman aqueducts, numerous tanks, cisterns and reservoirs, timber buildings and a fort. There are extensive unground mines, that were in use until 1938.
Archaeology suggests that gold extraction on this site may have started sometime in the Bronze Age, possibly by washing of the gold-bearing gravels of Afon Cothi, the most elementary type of gold prospecting.