The title of Earl of Desart was created in the Peerage of Ireland in 1793. The title became extinct following the death of the 5th earl in 1934.

The Earls of Desart bore the subsidiary titles of Viscount Desart (1781), Viscount Castle Cuffe (1793), and Baron Desart (1733) in the Peerage of Ireland. In 1909, the 5th Earl was created Baron Desart in the Peerage of the United Kingdom, but this title, along with all the others, became extinct upon his death.

The title should not be confused with the title Earl Dysart, created in the Tollemache family.

Barons Desart (1733)

• John Cuffe, 1st Baron Desart (d.1749)
• John Cuffe, 2nd Baron Desart (1730-1767)
• Otway Cuffe, 3rd Baron Desart (1737-1804), created Viscount Desart in 1781 and Earl of Desart in 1793

Earls of Desart (1793)

• Otway Cuffe, 1st Earl of Desart (1737-1804)
• John Otway Cuffe, 2nd Earl of Desart (1788-1820)
• John Otway O'Connor Cuffe, 3rd Earl of Desart (1818-1865)
• William Ulick O'Connor Cuffe, 4th Earl of Desart (1845-1898)
• Hamilton John Agmondesham Cuffe, 5th Earl of Desart (1848-1934)