Flemingston (also Lanmihangel y Twyn, or Treffelemin, or Michaelston Le Mont, or Flimstone) is a small village in the Vale of Glamorgan in south Wales. It is located 8.5 miles (13.7 km) northwest by road from the town centre of Barry. It contains the Church of St. Michael the Archangel, the ruins of , and Flemingston Manor or Grange, all of which are listed buildings. Historically, the parish of Flemingston was a sub-manor of Aberthaw or St Athan.