List of people with surname O'Brien
O'Brien is a surname of Irish origin. It has many variants in the Irish diaspora worldwide, such as Brien, O'Bryan, O'Brian, Brian, O'Brine and O'Bryen, which all claim a general common ancestry. The original Gaelic surname is Ó Briain. Notable people with the name include:
As surname
A
- Aidan O'Brien, Irish racehorse trainer
- Aiden O'Brien, Irish football player
- Alan O'Brien, Irish association football player
- Alex O'Brien, American tennis player
- Ambrose O'Brien, Canadian founder of the National Hockey Association
- Andy O'Brien, various
- Anne O'Brien, various
- Arthur O'Brien, New Zealand rugby union fullback
- Austin O'Brien, American actor and photographer
B
- Barry O'Brien, American TV screenwriter and producer
- Billy O'Brien , American baseball player
- Billy O'Brien, Welsh association football player
- Brendan O'Brien, various
- Brenna O'Brien, Canadian actress and voice actor
- Brock O'Brien, Australian rules footballer with Fremantle
- Buck O'Brien, pitcher with the Boston Red Sox and the Chicago White Sox
- Burton O'Brien, Scottish football player
C
- Casey O'Brien, American ice hockey player
- Cathy O'Brien , American long-distance runner
- Cathy O'Brien , American purported child-abuse victim
- Cecily O'Bryen, British diving champion
- Charles O'Brien, various
- Christian O'Brien, British geologist, author & historian
- Ciaran O'Brien, American soccer coach and player
- Cinders O'Brien, John F., or Darby O'Brien, American baseball pitcher
- Clinton O'Brien, Australian rugby league footballer
- Conal O'Brien, American television director
- Conan O'Brien, US comedian and talk show host
- Connor O'Brien or
- Conor O'Brien, various people
- Cubby O'Brien, American drummer and original Mouseketeer
D
- Daniel O'Brien, various
- Danielle O'Brien, Australian ice dancer
- Danny O'Brien, various
- Dara Ó Briain, Irish comedian and presenter
- Darcy O'Brien, American true crime author
- Daryl O'Brien, Australian rules footballer
- Dave O'Brien , American film actor
- Dave O'Brien, American sportscaster
- David O'Brien, various
- Doug Brien, American football placekicker
- Don Brien, Canadian sprint canoer
- Declan O'Brien, American film and TV writer and producer
- Declan O'Brien , with Drogheda United
- Dennis O'Brien, various
- Derek O'Brien, various
- Dermod O'Brien, Irish painter
- Donald O'Brien, various
- Doug O'Brien, Canadian ice hockey defenceman
- Dylan O'Brien, American actor
E
- Ed O'Brien, English musician
- Edmond O'Brien, American actor
- Edna O'Brien, Irish novelist
- Edward O'Brien, various
- Edwin Frederick O'Brien, American Catholic prelate
- Eileen O'Brien, various
- Elaine O'Brien, American politician
- Erin O'Brien, American writer
- Erin Joanne O'Brien, American actress
- Eugene O'Brien, various
F
- Fergal O'Brien, Irish professional snooker player
- Fergal O'Brien , Irish National Hunt trainer
- Fergus O'Brien, Irish politician
- Fitz James O'Brien, American SF and fantasy writer
- Flann O'Brien, Irish novelist and satirist
G
- Gareth O'Brien, English rugby league footballer
- Geraldine O'Brien, Irish botanical illustrator
- George O'Brien, various
- Ger O'Brien, Irish footballer
- Gerard O'Brien, various
- Geoffrey O'Brien, American poet, editor, and film critic
- Glenn O'Brien, American writer, "The Style Guy"
- Gray O'Brien, Scottish actor
- Gavin O'Brien, Irish hurler
H
- Harry O'Brien, later Héritier Lumumba, Australian rules footballer
- Harry J. O'Brien "Shorty", American football, basketball, baseball coach
- Helen O'Brien, British nightclub owner and spy
- Henry O'Brien, various
- Hod O'Brien, American jazz pianist
- Hugh O'Brien, mayor of Boston
I
- Iain O'Brien, New Zealand cricketer
- Ian O'Brien, Australian breaststroke swimmer
- Ignatius O'Brien, 1st Baron Shandon, Lord Chancellor of Ireland, 1913–1918
J
- Jack O'Brien, various
- Jake O'Brien , Canadian ice hockey player
- Jake O'Brien , American MMA fighter
- Jake O'Brien , Irish footballer
- James O'Brien, various
- Jamie O'Brien, various
- Jeremiah O'Brien, US Navy officer of the American Revolutionary War
- Jesse O'Brien, various
- Jim O'Brien, various
- Joan O'Brien, American actress and singer
- Joanne O'Brien, portrait and documentary photographer
- Joe O'Brien, various
- Joey O'Brien, Irish football player
- John O'Brien, various
- Joseph O'Brien, various
K
- Kate O'Brien
- Katharine O'Brien, American film director
- Katharine O'Brien, other people of that name
- Katherine O'Brien, Canadian pediatric infectious disease physician
- Kathleen O'Brien, Australian illustrator and fashion artist
- Katie O'Brien, British tennis player
- Keith O'Brien, Scottish Roman Catholic prelate
- Ken O'Brien, American football quarterback
- Kerry O'Brien, various
- Kevin O'Brien, various
- Kieran O'Brien, English actor
- Kim O'Brien, American film and television actress
- Kirsten O'Brien, British TV presenter
- Kitt O'Brien, American football player
- Kitty Wilmer O'Brien, Irish landscape painter
L
- Larry O'Brien, American politician
- Larry O'Brien , businessman, mayor of Ottawa
- Laurence O'Brien, Irish merchant and politician in Newfoundland
- Lawrence O'Brien, various
- Leighton O'Brien, American soccer player with the Seattle Sounders
- Lévis Brien, Quebec politician
- Leo O'Brien, various
- Leonora O'Brien, Irish pharmacist and entrepreneur
- Leslie O'Brien, Governor of the Bank of England
- Leslie O'Brien , played for New South Wales
- Liam O'Brien, various
- Lucy O'Brien, writer on women in music
- Lucy O'Brien , at University College, London
- Lucy O'Brien , Irish missionary in Africa
- Luke O'Brien, English footballer with Bradford City
M
- Margaret O'Brien, American actress
- Margaret O'Brien , Michigan Republican
- Mariah O'Brien, American actress and interior designer
- Mark O'Brien, various
- Mary Eileen O'Brien, American academic administrator
- Matthew O'Brien , Irish mathematician
- Maureen O'Brien, English actress in the Doctor Who series
- Michael O'Brien, various
- Michele O'Brien, soccer coach and player for Chicago Red Eleven
- Mick O'Brien, various
- Mike O'Brien with Glenroe and Limerick
- Miles O'Brien, various
- Mollie O'Brien, a folk singer from West Virginia
N
- Niall O'Brien, various
- Natasha O'Brien, an Irish woman attacked by an active-duty Irish soldier
- Nick O'Brien, Australian rules footballer for Essendon
O
- Olivia O'Brien, American singer and songwriter
P
- Paddy O'Brien, various
- Parry O'Brien, American shot put champion
- Patricia Salas O'Brien, Peruvian sociologist and Minister of Education
- Patrick O'Brien, for people with the forename Patrick or Pat
- Pat O'Brien, various
- Paul O'Brien, various
- Peter O'Brien, various
- Phil O'Brien, various
R
- Raymond O'Brien, American Roman Catholic priest
- Raymond Moulton O'Brien, British-born American businessman
- Richard O'Brien, various
- Riley O'Brien, American baseball pitcher
- Robert O'Brien, various
- Ron O'Brien, various
- Roy O'Brien, Irish football player
S
- Scott O'Brien, American football player, coach and scout
- Sean O'Brien
- Sean Patrick O'Brien, American professional wrestling referee
- Shane O'Brien, various
- Shannon O'Brien, various
- Sicele O'Brien, Irish woman aviation pioneer
- Simon O'Brien, various
- Soledad O'Brien, American woman television journalist
- Stephen O'Brien, UK conservative politician for Eddisbury
- Stuart O'Brien, American film editor
- Stuart O'Brien , Australian actor
T
- Terence O'Brien, various
- Thomas O'Brien, various
- Tim O'Brien, various
- Timothy O'Brien , British theatre designer
- Timothy O'Brien, Irish professor
- Timothy L. O'Brien, American journalist
- Tina O'Brien, English actress
- Tom O'Brien , American film actor
- Tom O'Brien , coach at North Carolina State University
- Tom O'Brien , baseball outfielder
- Tom O'Brien , 19th-century baseball player
- Tom O'Brien , British trade unionist and Member of Parliament
- Tommy O'Brien , baseball outfielder
U
- Una O'Brien, British civil servant
V
- Vincent O'Brien, various
- Virginia O'Brien, American actress and comic, "Frozen Face" singer
W
- Walter O'Brien, Irish businessman and computer specialist
- Walter A. O'Brien, American Progressive Party politician
- William O'Brien, various
- Willis H. O'Brien, American motion picture special effects pioneer
Z
- Zach O'Brien, professional ice hockey player
As first or middle names
- O'Brien Alston, American former football linebacker
- O'Brien Schofield, American former football linebacker
- O'Brien Smith, Irish-American political figure
Fictional people named O'Brien
- O'Brien, a character in George Orwell's novel Nineteen Eighty-Four
- Lady Cassandra O'Brien, a fictional character, Doctor Who antagonist
- Chloe O'Brian, a fictional character played by actress Mary Lynn Rajskub on the US television series 24
- Graham O'Brien, a companion of the Thirteenth Doctor in the BBC series Doctor Who
- Keiko O'Brien, a fictional character, wife of Miles O'Brien in Star Trek: The Next Generation and Deep Space Nine
- Miles O'Brien, a fictional character in Star Trek: The Next Generation and Deep Space Nine
- Sarah O'Brien, a fictional character on the ITV series Downton Abbey
- Shelia O'Brian, a character from the animated TV series Dungeons and Dragons
- Mr. O'Brien, Mrs. O'Brien and Jack O'Brien, fictional characters in the film The Tree of Life film