Moy Castle is a ruined castle near Lochbuie on the Isle of Mull, Scotland.
Moy Castle was built in the 15th century by Hector Reaganach Maclean, 1st Laird of Lochbuie, brother of Lachlan Lubanach Maclean of Duart. It was captured from the Macleans of Lochbuie by Clan Campbell, but later returned to the Macleans. It was abandoned in 1752 when a new house was built.
The castle comprises a three-level tower house with a garret. The crenellated parapet and the remains of two cap-houses survive at the upper level. The ground floor contains a well. The site is now a scheduled monument. A small enclosure or barmkin was located on the south-east side. Between 2006 and 2015 stabilisation works were carried out to preserve the castle and prevent further decay.
Moy Castle was used for scenes in Powell and Pressburger's 1945 film I Know Where I'm Going!, along with other locations on Mull.
Coordinates: 56°21′21″N 5°51′31″W / 56.35583°N 5.85861°W