Ian Campbell, 12th and 5th Duke of Argyll, DL, FRSA (28 August 1937 – 21 April 2001), styled Marquess of Lorne between 1949 and 1973, was a Scottish Peer and Chief of Clan Campbell.
He was also the 5th Duke of Argyll in the Peerage of the United Kingdom and Lord Lieutenant of Argyll and Bute.
In 1953, he was made a Fellow of the Royal Society for the Encouragement of Arts, Manufactures and Commerce.
He served with the Argyll and Sutherland Highlanders, earning the rank of captain.
Following his military service he worked in banking, then spent four years as a sales executive with Rank Xerox Export, regularly travelling behind the Iron Curtain.
In 1968 he took over running the dukedom's Inveraray Castle estate for his father.