Conor O'Brien may refer to:Conor O'Brien, Irish nobleman and landowner Conor O'Brien, 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, Irish peer Conor O'Brien (hurler), Tipperary intercounty player Conor O'Brien (soccer), American soccer player Conor O'Brien, Irish rugby union player Conor O'Brien, Irish musician and member of Villagers