William Annesley may refer to:
William Annesley, 1st Viscount Glerawly (1710–1770), Irish politician and noble William Annesley, 3rd Earl Annesley (1772–1838), Irish noble and British Member of Parliament William Annesley, 4th Earl Annesley (1830–1874), Irish-born British Conservative politician William Annesley (priest) (died 1817), Irish Anglican dean