Llanarthney (Welsh: Llanarthne; ) is a village and community in Carmarthenshire, south-west Wales. It is situated on the B4300 road, 12 km (7.5 miles) east of Carmarthen and 10 km (6 miles) west of Llandeilo. The community had a population at the 2001 census of 738,[1] of whom 61 per cent were Welsh-speaking. At the 2011 census the population had increased slightly to 765.[2]
Llanarthney is bordered (clockwise from the north) by the Carmarthenshire communities of Llanegwad, Llangathen, Llanfihangel Aberbythych, Gorslas, Llanddarog, Llangunnor, and Abergwili.