John O'Grady may refer to:
John O'Grady (athlete) (1891–1934), Irish Olympic shot putter John O'Grady (hurler) (1931-2024), Irish hurler, teacher, school principal, writer John O'Grady (priest) (1886–1966), Irish-American sociologist, economist, social reformer John O'Grady (writer) (1907–1981), Australian writer John O'Grady (American football) (born 1954), American football player and coach