Robert Leke, 3rd Earl of Scarsdale (9 March 1654 – 27 December 1707) was an English politician and courtier, styled Lord Deincourt from 1655 to 1681. He was related by marriage to the Earl of Huntingdon, a firm adherent of James and one of the very few non-Catholics to support him until the end. Like the vast majority, Scarsdale resigned from his offices in 1687 as a protest against his religious policies and supported the 1688 Glorious Revolution.