Llandyfaelog () is a community located in Carmarthenshire, Wales.
According to the 2001 census the community has a population of 1,272, of which 71.88 percent are Welsh speaking. The population at the 2011 Census had increased to 1,304.[1]
The community is bordered by the communities of Llangunnor, Llangyndeyrn, Kidwelly, St Ishmael, Llangain, and Carmarthen, all being in Carmarthenshire, and includes the villages of Idole, Croesyceiliog and Cwmffrwd.