The title of Earl of Ulster has been created several times in the Peerages of Ireland and the United Kingdom. Currently, the title is a subsidiary title of the Duke of Gloucester, and is used as a courtesy title by the Duke's son, Alexander Windsor, Earl of Ulster.
Earls of Ulster, Peerage of Ireland, First Creation (1205)
Earls of Ulster, Peerage of Ireland, Second Creation (1264)
- Walter de Burgh, 1st Earl of Ulster (d.1271)
- Richard Og de Burgh, 2nd Earl of Ulster (1259-1326)
- William Donn de Burgh, 3rd Earl of Ulster (1312-1333)
- Elizabeth de Burgh, Duchess of Clarence, 4th Countess of Ulster (d.1363)
- Philippa Plantagenet, Countess of March, 5th Countess of Ulster (1355-1382)
- Roger Mortimer, 4th Earl of March and 6th Earl of Ulster (1374-1398)
- Edmund Mortimer, 5th Earl of March and 7th Earl of Ulster (1391-1425)
- Richard Plantagenet, 3rd Duke of York, 8th Earl of Ulster (1412-1460)
- Edward Plantagenet, 4th Duke of York, 9th Earl of Ulster (1442-1483), merged in crown 1461
Earls of Ulster, Peerage of Ireland, Third Creation (1659)
Earls of Ulster, Peerage of Ireland, Fourth Creation (1716)
Earls of Ulster, Peerage of Ireland, Fifth Creation (1760)
Earls of Ulster, Peerage of Ireland, Sixth Creation (1784)
Earls of Ulster, Peerage of the United Kingdom, First Creation (1866)
Earls of Ulster, Peerage of the United Kingdom, Second Creation (1928)
