Jack O'Brien may refer to:
Sports
- Jack O'Brien (American football) (born 1932), American football player
- Jack O'Brien (catcher) (1860–1910), Major League Baseball player
- Jack O'Brien (cricketer) (1886–1939), New Zealand cricketer
- Jack O'Brien (footballer, born 1887) (1887–1959), Australian rules footballer for Essendon and Fitzroy
- Jack O'Brien (footballer, born 1893) (1893–1934), Australian rules footballer for South Melbourne
- Jack O'Brien (footballer, born 1898) (1898–1966), Australian rules footballer for Essendon and Footscray
- Jack O'Brien (footballer, born 1906) (1906–1970), Australian rules footballer for South Melbourne and Hawthorn
- Jack O'Brien (outfielder) (1873–1933), American baseball player
- Jack O'Brien (wrestler) (1910–1982), American-born Mexican professional wrestler
- Philadelphia Jack O'Brien (1878–1942), American boxer, former light heavyweight boxing champion of the world
- Young Jack O'Brien (1894–?), lightweight boxer from Pennsylvania
Others
- Jack O'Brien (director) (born 1939), American theatre director and producer
- Jack O'Brien (jazz pianist) (1903–1982), big band pianist and songwriter
- John B. O'Brien (known as Jack, 1884-1936), American actor and film director
- Jack O'Brien (editor) (born 1980), American editor
- Jack O'Brien (Artist) (born 1993), British Artist
See also
- John O'Brien (disambiguation)
- Jack O'Brian (1914–2000), journalist
Topics referred to by the same termThis disambiguation page lists articles about people with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: