Conor O'Brien may refer to:
Conor O'Brien (died 1603), Irish nobleman and landowner Conor O'Brien (died 1651), Royalist Commander during the Irish Confederate Wars Edward Conor Marshall O'Brien (1880–1952), Irish aristocrat, republican, nationalist, sailor Conor Cruise O'Brien (1917–2008), Irish writer, politician, and diplomat Conor O'Brien, 18th Baron Inchiquin (born 1943), Irish peer Conor O'Brien (hurler) (born 1985), Tipperary intercounty player Conor O'Brien (soccer) (born 1988), American soccer player Conor O'Brien (rugby union) (born 1996), Irish rugby union player Conor O'Brien, Irish musician and member of Villagers
See also Connor O'Brien (disambiguation) Conor O'Brian, American wrestler