Marquess of Donegall is a title in the Peerage of Ireland, created in 1791 for the Earl of Donegall.
The Marquess holds the subsidiary titles of Earl of Donegall (1647), Earl of Belfast (1791), Viscount Chichester of Carrickfergus (1625), Baron Fisherwick (1790), and Baron Chichester of Belfast (1625). All but the Fisherwick title are in the Peerage of Ireland.
Before the passage of the House of Lords Act 1999 the Marquess sat in the House of Lords as Baron Fisherwick in the Peerage of Great Britain.
Marquesses of Donegall (1791)
- Arthur Chichester, 1st Marquess of Donegall (1739-1799)
- George Augustus Chichester, 2nd Marquess of Donegall (1769-1844)
- George Hamilton Chichester, 3rd Marquess of Donegall (1797-1883)
- Edward Chichester, 4th Marquess of Donegall (1799-1889)
- George Augustus Hamilton Chichester, 5th Marquess of Donegall (1822-1904)
- Edward Arthur Donald St George Hamilton Chichester, 6th Marquess of Donegall (1903-1975)
- Dermot Richard Claud Chichester, 7th Marquess of Donegall (b. 1916)
