Llantarnam (Welsh: Llanfihangel Llantarnam) is a suburb 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.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.