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)
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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)