Llanfynydd is a village, parish and community in Carmarthenshire, Wales. The community population at the 2011 census was 499. It lies some 10 miles north-east of the county town, Carmarthen. Bordering it are the communities of Llansawel, Talley, Manordeilo and Salem, Llangathen, Llanegwad and Llanfihangel Rhos-y-Corn, all in Carmarthenshire.