John O'Neill may refer to:
Music
- John O'Neill (guitarist) (born 1957), Northern Irish guitarist of rock band The Undertones
- John O'Neill (musician, born 1926) (1926–1999), British singer, whistler, and trumpeter
Politics
- John O'Neill (Canadian politician) (1858–1922), Liberal politician in Ontario, Canada
- John O'Neill (congressman) (1822–1905), U.S. Representative from Ohio and state senator
- John O'Neill (Fenian) (1834–1878), member of the Irish Republican Brotherhood (Fenians)
- John O'Neill (Irish senator) (died 1941), Irish Cumann na nGaedheal senator in 1925
- John O'Neill (philosopher), political philosopher, professor of political economy at the University of Manchester
- John O'Neill (political activist) (born 1946), fervent opponent of John Kerry and a leader of the groups Swift Vets and POWs for Truth
- John O'Neill (Wisconsin politician) (1830–?), Wisconsin state assemblyman
- John O'Neill, 1st Viscount O'Neill (1740–1798), Irish politician
- John O'Neill, 3rd Viscount O'Neill (1780–1855), Irish Tory politician
- John A. O'Neill (died 1892), American steel engraver and mayor of Hoboken, New Jersey
- John J. O'Neill (American politician) (1846–1898), Missouri congressman
- John Joseph O'Neill (British politician) (1888–1953), Liberal Party politician in England, member of parliament for Lancaster 1923–1924
- John Raymond O'Neill (1891–1951), Conservative member of the Canadian House of Commons
- St John O'Neill (1741–1790) represented Randalstown in the Irish House of Commons
Sports
- John O'Neill (Australian rules footballer) (born 1935), Geelong player during the 1950s
- John O'Neill (baseball), baseball player
- John O'Neill (field hockey) (born 1968), American former field hockey player
- John O'Neill (footballer, born 1935) (1935–2012), Republic of Ireland and Preston North End player
- John O'Neill (footballer, born 1958), Northern Ireland player
- John O'Neill (footballer, born 1974), former Scottish football player with Queen of the South and former manager of Stirling Albion
- John O'Neill (rugby league) (1943–1999), Australian rugby league footballer and coach
- John O'Neill (rugby union, born 1973), Irish rugby union player
- John O'Neill (rugby union, born 1932), Australian rugby union player
- John O'Neill (Tipperary hurler) (born 1990), Irish hurler
- John O'Neill (runner), American steeplechase runner, 2nd at the 1925 USA Outdoor Track and Field Championships
Other
- John O'Neill, architect who oversaw the completion of St Peter's Cathedral, Belfast
- John O'Neill (businessman) (born 1951), CEO of the Australian Rugby Union and former head of Football Federation Australia
- John O'Neill (editor), founding editor of Black Gate (magazine)
- John O'Neill (lighthouse keeper) (1768–1838), American military officer and lighthouse keeper
- John O'Neill (poet) (1777–1854), Irish shoemaker poet and playwright
- John O'Neill (VC) (1897–1942), Scottish recipient of the Victoria Cross during the First World War
- John O'Neill (video game designer) (born 1948), experimental art video game designer
- John O'Neill, 3rd Earl of Tyrone (died 1641), the son of Hugh O'Neill
- John Johnston O'Neill (1886–1966), Canadian geologist and academic
- John Joseph O'Neill (journalist) (1889–1953), winner of the Pulitzer Prize for Reporting
- John P. O'Neill (1952–2001), former FBI agent and head of security at the World Trade Center at the time of the September 11, 2001 attacks
- John S. O'Neill (born 1979), British molecular biologist
- John Michael O'Neill, Canadian Roman Catholic bishop
- John O'Neill (sociologist), Canadian sociologist, phenomenologist, and social theorist
See also
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: