The title Earl of Dundonald was created in 1669 in the Peerage of Scotland for the soldier Sir William Cochrane. Other titles held by the Earl of Dundonald are: Lord Cochrane of Dundonald (created 1647) and Lord Cochrane of Paisley and Ochiltree (1669). Both subsidiary titles are in the Peerage of Scotland.

Earls of Dundonald (1669)

• William Cochrane, 1st Earl of Dundonald (d. 1686)
• John Cochrane, 2nd Earl of Dundonald (d. 1690)
• William Cochrane, 3rd Earl of Dundonald (1686-1705)
• John Cochrane, 4th Earl of Dundonald (1687-1720)
• William Cochrane, 5th Earl of Dundonald (1708-1725)
• Thomas Cochrane, 6th Earl of Dundonald (1702-1737)
• William Cochrane, 7th Earl of Dundonald (1729-1758)
• Thomas Cochrane, 8th Earl of Dundonald (1691-1778)
• Archibald Cochrane, 9th Earl of Dundonald (1749-1831)
• Thomas Cochrane, 10th Earl of Dundonald (1775-1860)
• Thomas Barnes Cochrane, 11th Earl of Dundonald (1814-1885)
• Douglas Mackinnon Baillie Hamilton Cochrane, 12th Earl of Dundonald (1852-1935)
• Thomas Hesketh Douglas Blair Cochrane, 13th Earl of Dundonald (1886-1958)
• Ian Douglas Leonard Cochrane, 14th Earl of Dundonald (1918-1986)
• Iain Alexander Douglas Blair Cochrane, 15th Earl of Dundonald (b. 1961)