Angus Charles Drogo Montagu, 12th Duke of Manchester (Kimbolton Castle, 9 October 1938 – 25 July 2002), was a British hereditary peer. He inherited the Dukedom of Manchester in 1985 and was a member of the House of Lords until the House of Lords Act 1999. Until he inherited the dukedom, he was known by the courtesy title of Lord Angus Montagu.