Conor O'Brien

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