Lt.-Col. Lord Edward Cavendish (28 January 1838-18 May 1891) was a 19th century United Kingdom British politician.

Cavendish was a younger son of William Cavendish, 7th Duke of Devonshire, by his wife, Lady Blanche Howard, daughter of the 6th Earl of Carlisle. His father and his two surviving brothers were all Members of Parliament: his brother Spencer, MP for Lancashire North 1857-91 and later 8th Duke of Devonshire, led the Liberal Party and was asked three times to be Prime Minister by Queen Victoria; the middle brother, Frederick was MP for the West Riding and Chief Secretary for Ireland, assassinated in 1882.

Cavendish served as MP for Derbyshire West. Like his eldest brother, he became a Liberal Unionist in reaction to the Liberal Party's policy on Irish Home Rule. Upon his death, his son, Victor, was elected unopposed to replace him, later becoming 9th Duke of Devonshire. Cavendish had two other sons with his wife Emma Lascelles, daughter of Rt Hon William Lascelles : Richard Cavendish also became a Member of Parliament; John was killed in action in World War I.