The title of Marquess of Ailsa was created in the Peerage of the United Kingdom in 1831 for the Scottish Earl of Cassilis.
The Marquess holds the subsidiary titles of Earl of Cassilis (Scottish, 1509), Lord Kennedy (Scottish, 1457), and Baron Ailsa (U.K., 1806).
Marquesses of Ailsa (1831)
- Archibald Kennedy, 1st Marquess of Ailsa (1770-1846)
- Archibald Kennedy, 2nd Marquess of Ailsa (1816-1870)
- Archibald Kennedy, 3rd Marquess of Ailsa (1847-1938)
- Archibald Kennedy, 4th Marquess of Ailsa (1872-1943)
- Charles Kennedy, 5th Marquess of Ailsa (1875-1956)
- Angus Kennedy, 6th Marquess of Ailsa (1882-1957)
- Archibald David Kennedy, 7th Marquess of Ailsa (1925-1994)
- Archibald Angus Charles Kennedy, 8th Marquess of Ailsa (b. 1956)
