William O'Grady

William O'Grady may refer to:
 * William O'Grady (cleric) (1801–1859), Irish religious leader
 * William O'Grady (footballer) (fl. 1948), 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