Carreg Cennen Castle is a castle near the River Cennen, in the village of Trap, four miles south of Llandeilo in Carmarthenshire, Wales.
The castle is within the Brecon Beacons National Park, and its location has been described as spectacular, due to its position above a limestone precipice.
It has been in a ruinous state since 1462 and is now in the care of Cadw, the Welsh Government historic environment service.