Ian Maitland, 18th Earl of Lauderdale (born 4 November 1937), styled Viscount Maitland from 1968 to 2008, is a Scottish peer.
Maitland is the son of Patrick Maitland, 17th Earl of Lauderdale and his wife Stanka Losanitch. He was educated at Radley College and took an MA from Brasenose College, Oxford. He married Anne Paule Clark on 27 April 1963, by whom he has one son and one daughter:
From 1963 to 1973, he served as a lieutenant in the Royal Naval Reserve. In 1974, he joined National Westminster Bank, rising to become a senior regional manager when he left their employ in 1995. He was director of Maitland Consultancy Services, Ltd. from 1995 to 2007 and a marketing advisor to the London School of Economics from 1995 to 2001.
In 1986, he was appointed a member of the Royal Company of Archers, and in 1998 became a freeman of the City of London and a liveryman of the Worshipful Company of Fan Makers. Maitland succeeded his father in the earldom in 2008, also becoming chief of Clan Maitland and hereditary bearer of the National Flag of Scotland.