William Annesley, 3rd Earl Annesley

William Richard Annesley, 3rd Earl Annesley (16 July 1772 – 25 August 1838) was an Anglo-Irish noble and British Member of Parliament.

Lord Annesley was the eldest son of Richard Annesley, 2nd Earl Annesley and Anne Lambert. He married Lady Isabella St. Lawrence, a daughter of William St. Lawrence, 2nd Earl of Howth on 19 May 1803 and with her had one daughter:

• Lady Mary Annesley (c. 1810-1837)

Lord Annesley divorced Lady Isabella St. Lawrene by Act of Parliament in 1821. He then married Priscilla Cecilia Moore on 15 July 1828, with her having six sons:

• William Richard Annesley, 4th Earl Annesley (1830–1874)
• Hugh Annesley, 5th Earl Annesley (1831–1908)
• The Hon. Robert John Annesley (1834–1854)
• The Hon. Arthur Annesley (1835–1881)
• The Hon. George Annesley (1837–1903)
• The Hon. William Octavius Beresford Annesley (1838–1875)

He was High Sheriff of Down for 1822.