Llantarnam is a village of Cwmbran, and is a community and electoral ward in the county borough of Torfaen in south east Wales. The ward covers the same area as the community, but also includes Southville. It is equidistant from Cwmbran town centre and the town of Caerleon. Llantarnam Abbey is a Cistercian abbey founded in 1179 as a daughter house of Strata Florida Abbey. The remains of that abbey are incorporated into the present buildings housing the Sisters of Saint Joseph.