South Cowton Castle is a 15th-century fortified dwelling house in the Richmondshire district of North Yorkshire, England. It is situated on the land that was once the medieval village of South Cowton. The castle was built by Sir Richard Conyers in 1470 and it is the oldest surviving building in any of the Cowtons. The castle was built at the time of the Wars of the Roses, which gives an indication of why what is a country gentleman's house is so heavily fortified. The castle is now used as a private farmhouse, it can be found just off the B1263 road near Atley Hill.