Ffairfach railway station serves the village of Ffairfach, near Llandeilo, Carmarthenshire, Wales. The station is on the Heart of Wales Line 30 miles (48 km) north east of Swansea. The railway station is located next to the main road Heol Cennen, which crosses the line at its south end. This is the nearest railway station to Carreg Cennen Castle. The former station signal box has been preserved on the Gwili Railway as a working museum exhibit after being made redundant here when the level crossing was automated. All trains serving the station are operated by Transport for Wales.