Brian O'Neill

Brian O'Neill may refer to:

• Brian D. O'Neill (born 1949), American author and attorney
• Brian O'Neill (journalist) (c. 1900–1975), English and Irish journalist and author
• Brian O'Neill, fictional Irish gangster in Mafia II

• Brian O'Neill (ice hockey, born 1929) (1929–2023), Canadian executive in the National Hockey League
• Brian O'Neill (ice hockey, born 1988), American ice hockey player
• Brian O'Neill (American football) (born 1995), American football offensive tackle

• Brian McPhelim O'Neill (died 1574), lord of Lower Clandeboye
• Brian MacArt O'Neill (died 1607), member of the O'Neill Dynasty
• Brian J. O'Neill (born 1949), American politician
• Brian O'Neill (superintendent) (1941–2009), American superintendent of the Golden Gate National Recreation Area
• Brian O'Neill (died 1260), High King of Ireland
• Brian C. O'Neill (born 1965), American earth system scientist and demographer
• Brian O'Neill, Baron Dungannon (died 1562), Irish aristocrat
• Sir Brian O'Neill, 2nd Baronet (died 1694), Irish landowner, barrister and judge
• Brian O'Neill (died 1617), seventeenth-century Irish noble

• Brian O'Neil (disambiguation)