Earl Annesley (pronounced "Anns-ley"), of Castlewellan in the County of Down, is a title in the Peerage of Ireland that created on 17 August 1789 for the 2nd Viscount Glerawly with special remainder to his younger brother Richard, who succeeded him as 2nd Earl.
The title Viscount Glerawly, in the County of Fermanagh had been created on 20 September 1758, and the title Baron Annesley, of Castlewellan in the County of Down, had been created on 14 November 1766. Both had been created for the 1st Earl's father, William, who was the sixth son of Hon. Francis Annesley, fourth son of the 1st Viscount Valentia. Consequently, the present holder of the Earldom of Annesley is also in remainder to the Viscountcy of Valentia and its subsidiary titles.
Viscounts Glerawly (1766)
- William Annesley, 1st Viscount Glerawly (c. 1710-1770)
- Francis Charles Annesley, 2nd Viscount Glerawly (1740-1802) (created Earl Annesley in 1789)
Earls Annesley (1789)
- Francis Charles Annesley, 1st Earl Annesley (1740-1802)
- Richard Annesley, 2nd Earl Annesley (1745-1824)
- William Richard Annesley, 3rd Earl Annesley (1772-1838)
- William Richard Annesley, 4th Earl Annesley (1830-1874), elected a Representative Peer in 1867
- Hugh Annesley, 5th Earl Annesley (1831-1908), elected a Representative Peer in 1877
- Francis Annesley, 6th Earl Annesley (1884-1914)
- Walter Beresford Annesley, 7th Earl Annesley (1861-1934)
- Beresford Cecil Bingham Annesley, 8th Earl Annesley (1894-1957)
- Robert Annesley, 9th Earl Annesley (1900-1979)
- Patrick Annesley, 10th Earl Annesley (1924-2001)
- Philip Harrison Annesley, 11th Earl Annesley (b. 1927)
The heir presumptive is the present holder's brother Hon. Michael Robert Annesley (born 4 December 1933)
The heir presumptive's heir presumptive is his son Michael Stephen Annesley (born 26 July 1957)