Gylen Castle is a very small castle, or tower house, at the south end of the island of Kerrera in Argyll and Bute, Scotland, on a promontory overlooking the Firth of Lorne.
Built in 1582 by the Clan MacDougall. Gylen was only occupied for a relatively short time. The castle was besieged then burned by the Covenanters under General Leslie in 1647 during the Wars of the Three Kingdoms.
In May 2006 a partial restoration of the castle was completed with a £300,000 grant by Historic Scotland and £200,000 raised by worldwide members of Clan MacDougall.
Coordinates: 56°22′47″N 5°33′24″W / 56.37967°N 5.55674°W