John Casey may refer to:John Casey (academic), British academic and writer for The Daily Telegraph John Casey (Chuck), fictional character portrayed by Adam Baldwin on the television show Chuck John Casey (commentator), Australian journalist and sports broadcaster John Casey (footballer), Dumbarton FC player John Casey (mathematician) (1820–1891), Irish geometer John Casey (politician) (1823–1893), Newfoundland politician John Casey (novelist) (1939–2025), American novelist and translator John Casey, rugby league footballer of the 1920s and 1930s John J. Casey (1875–1929), Democratic member of the U.S. House of Representatives from Pennsylvania John Casey, American author John Casey, Irish rebel transported to Australia in 1826 John Keegan Casey (1846–1870), Irish poet, orator and republican John Sears Casey (1930–2022), member of the Alabama House of Representatives Captain John C. Casey (1809–1856), who gave his name to Fort Casey in Florida Jack Casey, member of the New Jersey General Assembly