John O'Reilly may refer to: John O'Reilly (soldier) (born 1908), Irish soldier John O'Reilly (politician) (born 1951), Canadian politician John O'Reilly (composer) (born 1940), composer and music theorist John O'Reilly (cricketer) (born 1930), Australian cricketer John B. O'Reilly Jr. (born 1948), mayor of Dearborn, Michigan John Boyle O'Reilly (1844–1890), poet and novelist John Francis O'Reilly (1888–1942), Australian politician John Joseph O'Reilly (1888–1933), Australian politician John O'Reilly (engineer) (born 1946), vice-chancellor of Cranfield University John Joe O'Reilly (politician) (1881–1967), Irish politician John Joe O'Reilly (Gaelic footballer) (1919–1952) See also Jack O'Reilly (1914–?), footballer Jack O'Reilly (Gaelic footballer) (1896–1942), Irish Gaelic footballer John O'Reily (1846–1915), Australian bishop John Reilly (disambiguation)