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, and is bordered by the communities of llansawel, talley, manordeilo and salem, llangathen, llanegwad and llanfihangel rhos-y-corn, all in carmarthenshire.