Gylen Castle is a ruined 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. It was made a scheduled monument in 1931. 
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.
- "Gylen Castle, castle and associated settlement, KerreraSM294". Historic Environment Scotland. Retrieved 3 September 2017.
- "Castle reopens after restoration". BBC. 12 May 2006. Retrieved 2009-04-13.
It was restored with a £300,000 Historic Scotland grant and £200,000 from almost all clan members around the world. The Historic Scotland grant enabled a specialist architectural team to restore elements of the castle, including its oriel window and its vaulted cellar.
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