Llanfynydd is a village, parish, and community located in the county of Carmarthenshire, Wales. It is situated approximately 10 miles north-east of the county town of Carmarthen.
The community has a population of 528, according to the 2021 census. It shares borders with several surrounding communities, including Llansawel, Talley, Manordeilo, Salem, Llangathen, Llanegwad, and Llanfihangel Rhos-y-Corn.