List of people with surname O'Neill

This is a list of people with surname O'Neill, including the variant spellings O'Neil and O'Neal.

A

 * Alan O'Neill (footballer, born 1957), Irish football player
 * Alan O'Neill (footballer, born 1973), Irish football player
 * Alexander O'Neal (born 1953), American musician
 * Alexandre O'Neill (1924–1986), Portuguese writer
 * Alexander O'Neill aka Alexx O'Nell (born 1980), American musician and actor
 * Amber O'Neal (born 1974), American professional wrestler
 * Amos O'Neal, American politician
 * Amy O'Neill (born 1971), an actress/performer
 * Ana María O'Neill, an educator, author and advocate of women's rights
 * Andrew O'Neill (born 1979), English vegan, anarchist, transvestite, stand-up comedian, musician and writer
 * Anthony O'Neill (born 1964), Australian fiction writer
 * Aisling O'Neill, Irish actress
 * April O'Neil, a fictional character in the Teenage Mutant Ninja Turtles franchise
 * Arthur Joseph O'Neill (1917–2013), an American bishop of the Roman Catholic Church
 * Arthur O'Neill (1876–1914), was an Irish Ulster Unionist Party politician
 * Arturo O'Neill (1736–1814), an Irish-born colonel who served the Spanish crown as governor of several places in New Spain (1781–1794)

B

 * Barbara O'Neil, an American film and stage actress
 * Bernie O'Neill (politician), member of the Pennsylvania House of Representatives
 * Bernie O'Neill (bowls), Northern Irish lawn bowler
 * Bernie O'Neill (Gaelic footballer) (born 1945), Irish Gaelic footballer
 * Bill O'Neill (1880–1920), a Canadian-born Major League Baseball player
 * Billy O'Neill (rugby) (1878–1955), a Welsh international rugby union player
 * Billy O'Neill (footballer), an Irish professional footballer
 * Birch O'Neal (c. 1913–1995), FBI/CIA agent
 * Brendan O'Neill (businessman) (born 1948), a British business executive
 * Brendan O'Neill (journalist), an English journalist
 * Brian O'Neill (ice hockey, born 1929), a Canadian executive within the National Hockey League
 * Brian O'Neill (ice hockey, born 1988), American ice hockey player
 * Brian O'Neill (1574), chief of the O'Neills of Clanaboy, surrendering his title to Sir Philip Sidney for a knighthood in 1567
 * Brian O'Neill (superintendent) (1941–2009), an American superintendent of the Golden Gate National Recreation Area
 * Brian O'Neill (American football) (born 1995), American football player
 * Bryan O'Neil (1905–1954), British archaeologist and historian
 * Buckey O'Neill (1860–1898), an American soldier, sheriff, newspaper editor, miner, politician, gambler and lawyer
 * Byron O'Neill (born 1970), an American artist

C

 * Calvin O'Neal, American football linebacker
 * Carol O'Neal (born 1948), American model and Playboy magazine's Playmate of the Month in July 1972
 * Catherine O'Neill (cricketer), New Zealand-born Irish cricketer
 * Charles Duncan O'Neal (1879–1936), Barbados politician and physician
 * Charles O'Neal (1904–1996), American film and television screenwriter
 * Christopher John O'Neill, Broadway actor
 * Chris O'Neill, Irish animator and YouTuber
 * Connor O'Neill, fictional Northern Irish character in the Australian soap opera Neighbours
 * C. William O'Neill (1916–1978), American politician
 * Carlos O'Neill (1760–1835), titular head of the Clanaboy O'Neill dynasty
 * Cecily O'Neill, authority on Process drama and the arts in education
 * Charles O'Neill (musician), Canadian bandmaster and composer
 * Charles O'Neill (engineer) (1828–1900), Australasian engineer, inventor, parliamentarian and philanthropist
 * Charles H. O'Neill (c. 1800–1897), Irish-born American politician and mayor
 * Charles O'Neill (Pennsylvania politician) (1821–1893), American politician
 * Charles O'Neill, 1st Earl O'Neill (1779–1841), British politician, peer and landowner
 * Chloe Ann O'Neil (1943–2018), New York politician
 * Christopher O'Neill (born 1974), British-American businessman and the husband of Princess Madeleine of Sweden
 * Cian O'Neill, Irish Gaelic footballer, coach and manager
 * Colm O'Neill (born 1964), Irish sportsperson
 * Colm O'Neill (born 1988), Irish sportsperson
 * Con O'Neill (actor) (born 1966), British actor
 * Con O'Neill (diplomat) (1912–1988), British civil servant and diplomat
 * Conn (Constantine) O'Neill, titular head of the Clanaboy O'Neill dynasty

D

 * Dave O'Neal (1937–2021), American politician, Lieutenant Governor of Illinois
 * Deltha O'Neal (born 1977), American football player
 * Damian O'Neill (born 1961), lead guitarist in the pop-punk band, The Undertones
 * Dan O'Neill (born 1942), American underground cartoonist
 * Dan O'Neill (writer), American journalist and writer
 * Daniel O'Neill (painter) (1920–1974), Irish Romantic painter
 * Daniel O'Neill (editor), Irish-born American newspaper editor and owner
 * Daria O'Neill (born 1971), American radio and television personality
 * Darren O'Neill, an Irish boxer
 * Dennis O'Neill (disambiguation), several people
 * Dermot O'Neill (disambiguation), several people
 * Diarmuid O'Neill (1969–1996), English-born volunteer in the Provisional Irish Republican Army
 * Dick O'Neill (1928–1998), American stage, film and television actor
 * Don O'Neill (artist), American watercolorist and architect
 * Donal O'Neill, Gaelic footballer for Galway
 * Douglas F. O'Neill (born 1968), American Thoroughbred horse trainer

E

 * Eamon O'Neill (born 1944), Northern Irish nationalist politician in Northern Ireland
 * Eamonn O'Neill (died 3 November 1954), Irish Cumann na nGaedhael and later Fine Gael party politician
 * Edward O'Neill (disambiguation), several people
 * Ed O'Neill (born 1946), American actor
 * Ed O'Neal (1936–2022), American musician, of the Dixie Melody Boys
 * Edward J. O'Neill (general) (1902–1979), American US Army officer
 * Edward L. O'Neill (1903–1948), American politician
 * Edward O'Neill, 2nd Baron O'Neill (1839–1928), arish peer and politician
 * Eliza O'Neill (1791 – 29 October 1872), Irish actress, later baronetess
 * Elizabeth O'Neill Verner (1883–1979), artist, author and lecturer
 * Ella O'Neill, mother of playwright Eugene O'Neill and wife of actor James O'Neill
 * Emmett O'Neill (1918–1993), American Major League Baseball pitcher
 * Eric O'Neill (born 1973), American former American FBI operative
 * Eugene M. O'Neill (1850–1926), Irish-born American lawyer and newspaper owner
 * Eugene O'Neill (hurler) (born 1978), Irish sportsperson
 * Eugene O'Neill (1888–1953), American playwright, and Nobel laureate in Literature
 * Eunan O'Neill (born 1982), Northern Irish television presenter
 * Evan O'Neill Kane (1861–1932), surgeon working in Pennsylvania, US
 * Edward Asbury O'Neal (1818–1890), American Confederate general during the American Civil War
 * Emmet O'Neal (1853–1922), American Democratic politician who was Governor of Alabama

F

 * Frank O'Neal, American cartoonist
 * Frederick O'Neal (1905–1992), American actor and television director
 * Fabián O'Neill (born 1973), Uruguayan former football midfielder
 * Felim O'Neill of Kinard, Irish nobleman who led the Irish Rebellion of 1641 in Ulster
 * Francis O'Neill (1848–1936), Irish-born American police chief and author of several Irish music collections
 * Frank "Buck" O'Neill (1875–1958), American head football coach
 * Frank O'Neill (footballer, born 1940) (born 1940), Irish footballer

G

 * Gail O'Neill, American model and television journalist
 * Gary O'Neill, various people
 * Gene O'Neill, American novelist
 * George Bernard O'Neill (1828–1917), Irish genre painter
 * George O'Neill (footballer, born 1942) (born 1942), Scottish footballer who played and managed in the US in his later career
 * George O'Neill (footballer, born 1923) (1923–2003), English footballer
 * Gerard K. O'Neill (1927–1992), American scientist
 * Gerard M. O'Neill (1942–2019), American journalist and writer
 * Griffin O'Neal (born 1964), American actor
 * Gwendolyn O’Neal (born 1946), American academic administrator and home economist

H

 * Harriet O'Neill, American judge
 * Harry O'Neill (disambiguation), several people
 * Heather O'Neill (born 1973), Canadian novelist, poet, short story writer, screenwriter and journalist
 * Henrique O'Neill, 1st Viscount of Santa Mónica, Portuguese noble and politician
 * Henry O'Neill (disambiguation), several people
 * Howard S. O'Neill (1883–1966), American politician and lawyer
 * Hugh McShane O'Neill, Irish nobleman and rebel in the 16th and 17th centuries
 * Hugh O'Neill (disambiguation), several people
 * Hugo José Jorge O'Neill (1874–1940), Portuguese nobleman

I

 * Isabelle Ahearn O'Neill (1880–1975), stage and screen actor and Rhode Island legislator
 * Ivan O'Neal, Vincentian political leader

J

 * Jack O'Neill, a fictional character in the Canadian-American SyFy television series Stargate SG-1
 * Jamie O'Neal (born Jamie Murphy, 1968), Australian country singer and songwriter
 * Jermaine O'Neal (born 1978), American NBA basketball player
 * Jim O'Neal (born 1948), American blues expert, writer, record producer and record company executive
 * Joseph T. O'Neal, American politician
 * Johnny O'Neal, American jazz pianist
 * Jack O'Neill (baseball) (1873–1935), Irish-American baseball catcher
 * Jack O'Neill (businessman) (1923–2017), American businessman
 * Jack O'Neill (disambiguation)
 * Jacquie O'Neill (born 1969), English illustrator
 * James O'Neill (disambiguation), several people
 * Jamie O'Neill (born 1962), Irish authoer
 * Jamie O'Neill (snooker player), English snooker player
 * Jan Lehane (born 1941), married name O'Neill, Australian tennis player
 * Jeff O'Neill (born 1976), Canadian broadcaster and former ice hockey player
 * Jeffrey O'Neill (disambiguation), several people
 * Jennifer O'Neill, American actress and model
 * Jevon O'Neill, British film director and producer
 * Jim O'Neill (disambiguation), several people
 * Jimmy O'Neill (footballer, born 1931) (1930–2007), Irish football goalkeeper
 * Jimmy O'Neill (footballer, born 1941), Northern Irish footballer
 * João O'Neill
 * João Pedro Torlades O'Neill
 * Joaquim Torlades O'Neill
 * Joe O'Neill, English footballer
 * John Johnston O'Neill (1886–1966), Canadian geologist and academic
 * John Joseph O'Neill (journalist) (1889–1953), American journalist
 * John Joseph O'Neill (British politician) (1888–1953), English Liberal MP
 * John Joseph O'Neill (American politician) (1846–1898), U.S. Representative from Missouri
 * John O'Neill (disambiguation), several people
 * John Raymond O'Neill, Canadian politician
 * Jonjo O'Neill (jockey) (born 1952), Irish National Hunt racehorse trainer and jockey
 * Jorge Maria O'Neill
 * Jorge Torlades O'Neill I
 * Jorge Torlades O'Neill II
 * José Carlos O'Neill
 * José Maria O'Neill
 * Joseph O'Neill (disambiguation), several people
 * Julian O'Neill (New Zealand rugby league), New Zealand rugby league footballer who played in England
 * Julian O'Neill, Australia rugby league footballer
 * Juliet O'Neill, Canadian journalist

K

 * Kathleen O'Neal Gear (born 1954), American writer
 * Kate Tenforde (née O'Neill; born 1980), American long-distance runner
 * Katie O'Neill, illustrator and writer from New Zealand
 * Keith O'Neill (disambiguation), several people
 * Ken O'Neal (born 1962), American football player
 * Kevin O'Neill (disambiguation), several people
 * Kim L. O'Neill, Irish biologist in the United States
 * Kitty O'Neil (1946–2018), American stuntwoman and racer

L

 * Leslie O'Neal (born 1964), American football player
 * Laurence O'Neill, Irish politician
 * Lawrence Joseph O'Neill, American judge
 * Lawrence O'Neill (disambiguation), several people
 * Linda O'Neill, Australian soccer player
 * Louis O'Neill, American diplomat and attorney
 * Luke O'Neill (disambiguation), several people

M

 * Madeline O'Neill (born 1867/68), British tennis player
 * Maggie O'Neill, British actress
 * Máire O'Neill (born 1978), Irish data encryption academic
 * Maire O'Neill (1886– 1952), Irish actress
 * Margaret O'Neill Eaton (1799–1879), wife of John Eaton, involved in the Petticoat Affair
 * María de Mater O'Neill (born 1960), Puerto Rican artist, designer and educator
 * Maria O'Neill, Portuguese member of the Clanaboy O'Neill dynasty
 * Mark O'Neill (disambiguation), several people
 * Martha Mary O'Neill, aka 'Mother Patricia', Irish-Australian Sister of Charity
 * Martin O'Neill, Baron O'Neill of Clackmannan
 * Martin O'Neill, Northern Irish footballer and manager
 * Marty O'Neill (born 1965), Canadian lacrosse player and manager
 * Mary Auguste O'Neill
 * Mary Devenport O'Neill, Irish poet
 * Mary O'Neill (Canadian politician), Canadian politician
 * Mary-Anne O'Neill, Australian politician
 * Mary Lovelace O'Neal, American artist
 * Mary Thomas O'Neal (1887 – after 1974), Welsh-born American labor activist
 * Maston E. O'Neal Jr. (1907–1990), American politician
 * Matthew O'Neill (disambiguation), several people
 * Maurice O'Neill (Irish republican), (d.1942), Executed Irish Republican
 * Melinda O'Neal, American conductor of choral music
 * Merlin O'Neill (1898–1981), Commandant of the United States Coast Guard 1950 to 1954
 * Michael O'Neill (disambiguation), several people
 * Michelle O'Neill, Irish politician, deputy First Minister of Northern Ireland since 2020, Vice President of Sinn Féin since 2018
 * Mike O'Neal (born 1951), Kansas Republican politician
 * Mildred O'Neill (1914? – 2003), wife of Speaker of the United States House of Representatives Tip O'Neill
 * Moira O'Neill, pseudonym of Agnes Shakespeare Higginson (1864–1955), Irish-Canadian poet
 * Morgan O'Neill, Australian writer, director, actor and producer

N

 * Nathan O'Neill, Australian cyclist
 * Nicholas O'Neill (disambiguation), several people
 * Norm O'Neill, Australian cricketer
 * Norman O'Neill (1875–1934), English composer and conductor

O

 * Onora O'Neill, Baroness O'Neill of Bengarve
 * Oona O'Neill, American actress
 * Owen Roe O'Neill (c.1585 – 1649), Gaelic Irish soldier
 * O'Neal Compton (1951–2019), American film and television actor
 * O'Neill Donaldson (born 1969), English footballer
 * O'Neill Spencer (1909–1944), American jazz drummer and singer
 * Sir Neil O'Neill, Irish chieftain

P

 * Patrice O'Neal (1969–2011), American comedian
 * Patrick O'Neal (disambiguation), several people
 * Peggy O'Neal (disambiguation), several people
 * Pete O'Neal (born 1940), American Black Panther Party member
 * Pat O'Neill (disambiguation), several people
 * Patrick O'Neill (disambiguation), several people
 * Paul O'Neill (disambiguation), several people
 * Pauline O'Neill (disambiguation), several people
 * Pearse O'Neill, Irish Gaelic footballer
 * Peggy O'Neil (1898–1960), Irish-American actress
 * Peter O'Neill, former prime minister of Papua New Guinea
 * Phelim (Felix) O'Neill
 * Phelim Caoch O'Neill (1517–1542), prince of the Cenél nEógain
 * Phelim O'Neill, 2nd Baron Rathcavan

R

 * Raiqwon O'Neal (born 2000), American football player
 * Ralph Ambrose O'Neill, American flying ace from World War I
 * Rebecca O'Neill (born 1981), New Zealand football player
 * Richard O'Neill (disambiguation), several people
 * Riley O'Neill (born 1985), Canadian soccer player
 * Robert O'Neal (American football) (born 1971), former American football cornerback
 * Robert O'Neal (murderer) (1961–1995), American white supremacist and convicted murderer executed in Missouri
 * Robert O'Neill (disambiguation), several people
 * Robin O'Neil, British historian
 * Rose O'Neill (1874–1944), American illustrator
 * Ryan O'Neill (American soccer player) (born 1978), American soccer midfielder
 * Ryan O'Neill (Northern Irish footballer) (born 1990), Northern Irish footballer
 * Ralph T. O'Neal (1933–2019), British Virgin Islands politician
 * Reagan O'Neal, one of several pseudonyms of James Oliver Rigney Jr (1948–2007), American writer
 * Ronan O'Neill, Irish Gaelic footballer
 * Ron O'Neal (1937–2004), American actor, director and screenwriter
 * Rose O'Neal Greenhow (1817–1864), Confederate spy
 * Ryan O'Neal (born 1941), American actor

S

 * Séamus Ó Néill (1910–1986), Irish writer
 * Shareef O'Neal (born 2000), American basketball player and son of Shaquille
 * Shaquille O'Neal (born 1972), American basketball player
 * Stanley O'Neal (born 1951), American business executive
 * Steve O'Neal (born 1946), American football punter
 * Seán O'Neill (born 1938), Northern Irish Gaelic footballer
 * Sean O'Neill (table tennis) (born 1967), American table tennis player and coach
 * Shane O'Neill (Irish chieftain) (c. 1530–1567), Irish chief of the O'Neill clan of Ulster
 * Shane O'Neill (Irish exile) (c. 1599 – 29 January 1641), youngest son of Hugh O'Neill, Earl of Tyrone
 * Shane O'Neill (Cork hurler) (born 1986), Irish sportsperson
 * Shannon O'Neill (comedian), American comedian
 * Shannon O'Neill (politician) (born 1937), Canadian politician
 * Sharon O'Neill (born 1952), New Zealand singer-songwriter and pianist
 * Sid O'Neill (1888—1915), Australian rules footballer
 * Simon O'Neill (born 1971), New Zealand-born operatic tenor
 * Stephen O'Neill (born 1980), Irish Gaelic footballer
 * Steve O'Neill (1891–1962), American catcher, manager, coach and scout in Major League Baseball
 * Steve O'Neill (owner) (1899–1983), American owner of a professional baseball team
 * Steve O'Neill (rugby league) (born 1958), English rugby league footballer
 * Susie O'Neill (born 1973), Australian swimmer

T

 * Tara Lynne O'Neill, Northern Irish actress
 * Ted O'Neill, Dean of Admissions at the University of Chicago
 * Terence O'Neill, Baron O'Neill of the Maine (1914–1990), the fourth Prime Minister of Northern Ireland
 * Terry O'Neill (feminist) (born c. 1953), American attorney, professor and activist for social justice
 * Terry O'Neill (martial artist) (born 1948), English actor and martial artist
 * Terry O'Neill (photographer) (1938–2019), English photographer
 * Thomas Newman O'Neill Jr. (1928–2018), American federal judge
 * Thomas O'Neill (journalist) (1904–1971), American journalist
 * Thomas O'Neill (Canadian politician) (1882–1965), Canadian politician
 * Thomas P. O'Neill III (born 1945), American politician
 * Tim O'Neill (Canadian football) (born 1979), Canadian football player
 * Timothy O'Neill (soccer) (born 1982), American soccer player
 * Tip O'Neill (1912–1994), American politician
 * Tip O'Neill (baseball) (1858–1915), Canadian left fielder in Major League Baseball
 * Titus O'Neil (born 1977; real name Thaddeus Bullard), American professional wrestler
 * Todd O'Neill (born 1982), American singer
 * Tom O'Neill (ice hockey) (1923–1973), Canadian ice hockey player
 * Tommy O'Neill (born 1955), Scottish football midfielder
 * Tony O'Neill, New York-based musician and author
 * Tatum O'Neal (born 1963), American actress
 * Tirlough Brassileagh Ó Neill, son of Phelim Caoch O'Neill, Prince of the Cenél nEógain
 * Turlough Luineach Ó Neill (1532–1595), Irish earl of the Clan-Connell, inaugurated as the King of Tyrone
 * Ty O'Neal (born 1978), American actor

W

 * Ward O'Neill (born 1951), Australian illustrator, caricaturist and cartoonist
 * Wes O'Neill (born 1986), Canadian ice hockey player
 * Willa O'Neill, New Zealand actress
 * William O'Neill (Connecticut politician) (1930–2007), American Governor of Connecticut
 * William O'Neill (Ohio jurist) (born 1947), American lawyer, jurist and appellate judge
 * William O'Neill, 1st Baron O'Neill (1813–1883), Anglo-Irish hereditary peer, clergyman and musical composer
 * William T. O'Neil (1850–1909), New York politician
 * William J. O'Neil, American entrepreneur, stockbroker and writer
 * William O' Neil (1848–?), member of the Wisconsin Legislature

Y

 * Yvonne O'Neill (1936–2010), Canadian politician