Kilchurn Castle (/kəlˈxʊərn/)[1] is a ruined structure on a rocky peninsula at the northeastern end of Loch Awe, in Argyll and Bute, Scotland.

At the time Kilchurn was on a small island scarcely larger than the castle itself, and would have been accessed via an underwater or low-lying causeway.

During the second half of the 16th century, another Sir Colin Campbell, the 6th Laird (1499–1583), further improved the castle's accommodation by adding some chambers to the north of the tower house, and remodelling the parapet.

In 1693 he promoted a scheme to pacify the Highlands, and as part of this he began conversion of Kilchurn into a modern barracks, capable of housing 200 troops.

Following the failure of the rising he returned home to find pro-government members of his household had turned Kinchurn and Finlarig over to Alexander Campbell of Fonab, to whom Breadalbane was obliged to surrender in February 1716.

[3] The Campbells attempted, unsuccessfully, to sell Kilchurn to the government after they moved in 1740 to the reconstructed Taymouth Castle.

In 1760, the castle was badly damaged by lightning and was completely abandoned; the remains of a turret of a tower, still resting upside-down in the centre of the courtyard, attest to the violence of the storm.

[12] Signage on the security fencing surrounding the castle states the closure is due to danger from falling masonry.