|OS grid reference|
|Sovereign state||United Kingdom|
|Fire||Mid and West Wales|
|Senedd Cymru – Welsh Parliament|
Llangyndeyrn (Welsh pronunciation) is a village and community in the River Gwendraeth river valley, Carmarthenshire, in Dyfed region of West Wales, United Kingdom. The village name is often spelt as Llangendeirne.
The Welsh language name of the village means "the church of St. Cyndeyrn". A Welsh saint named Cyndeyrn is the equivalent of the English Kentigern and the Scottish St. 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.
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 Meinciau.
The village is well known for its defence against a planned reservoir and is very proud of this fact. The villagers of Llangyndeyrn have recently been spotted in Passo Tonale, North Italy spreading the tale of the village and enjoying the Magic bar and especially El Bait!