Arthur Charles Valerian Wellesley, 9th Duke of Wellington (born 19 August 1945), styled Earl of Mornington between 1945 and 1972 and Marquess of Douro between 1972 and 2014, is a British aristocrat and politician.
He has served as Conservative Party Member of the European Parliament for Surrey (1979–1984) and Surrey West (1984–1989) and has sat as a hereditary peer in the House of Lords since 2015.