William O'Grady may refer to: William O'Grady (cleric) (1801–1859), Irish religious leader William O'Grady (footballer) (1924–1985), Irish Olympic footballer William O'Grady (linguist) (born 1952), American linguist, known for work in syntax, acquisition, and Korean William John O'Grady (died 1840), Irish Catholic priest and journalist in Upper Canada See also William O'Grady Haly, British army officer