Llangyndeyrn

Llangyndeyrn (Welsh pronunciation) is a village, community and electoral ward in the River Gwendraethvalley, Carmarthenshire, in Dyfed region of West Wales, United Kingdom. The village name is often spelt as Llangendeirne. In 2011 the community had a population of 3102.

The Welsh language name of the village means "the church of St. Cyndeyrn". A Welshsaint named Cyndeyrn is the equivalent of the EnglishKentigern and the ScottishSt. Mungo; but the St Cyndeyrn associated with Llangyndeyrn is believed to be a different one, a descendant of Cunedda whose festival is on 5/6 August.

Both St Cyndeyrn's parish church and Capel Salem are grade II* listed buildings. Nearby is the remains of Banc y Betws, or Betws Castle, a motte-and-bailey castle.

The small village is well known for its resistance against the attempt to flood the village in order to create a reservoir for the Borough of Swansea.

Within the village is the Ysgol Y Fro school for infants.

The community is bordered by the communities of: Llangunnor; Llanddarog; Pontyberem; Llanelli Rural; Trimsaran; Kidwelly; and Llandyfaelog, all being in Carmarthenshire and includes the villages of Pontyates, Carway and .