HMS Loch Killin (K391) was a Loch-class frigate of the Royal Navy, named after Loch Killin in Scotland. The ship was laid down at Burntisland Shipbuilding Company's yard in Fife on 2 June 1943, and launched on 29 November 1943. She was one of the first vessels armed with the brand new Squid anti-submarine mortar. Decommissioned in September 1945, the ship was put into Reserve, and finally scrapped on 24 August 1960. She was captained during the war by Lieutenant-Commander S. Darling, DSC and Bar, RANVR.