• James O'Neill (actor)
  James O'Neill (actor)
  James O'Neill was an actor and the father of the American playwright Eugene O'Neill....
  
   (1847–1920), father of the playwright Eugene O'Neill
• James O'Neill (archivist)
  James O'Neill (archivist)
  James O'Neill served as Acting Archivist of the United States from 1979 through July 1980.-External links:* *...
  
  , American acting Archivist for the National Archives
• James O'Neill (baseball)
  James O'Neill (baseball)
  James P. O'Neill was an American baseball pitcher who is most notable for winning the 1952 College World Series Most Outstanding Player award while a senior at College of the Holy Cross. He is the only person from College of the Holy Cross to ever win the award. He was inducted into the College of...
  
  , winner of College World Series Most Outstanding Player award in 1952
• James O'Neill (New Zealand politician) (1819–1882)
• James O'Neill (Washington politician) (1824–1913), American politician in Oregon and Washington states
• James O'Neill (priest)
  James O'Neill (priest)
  Canon James Kearney O’Neill was a native of Ballypatrick, County Antrim, Ireland, where his maternal uncle, Thomas J. Kearney, had previously been parish priest....
  
   (died 1922), founder of the Knights of Saint Columbanus
• James Ryan O'Neill
  James Ryan O'Neill
  James Ryan O'Neill is an Australian convicted murderer, currently serving a life sentence in Tasmania for a murder he committed in February 1975....
  
   (born 1947), Australian serial killer
• James O'Neill (Wisconsin settler)
  James O'Neill (Wisconsin settler)
  James O'Neill was a Wisconsin settler, jurist, and sawmill owner.He was born in Lisbon, New York and worked in lumber in Canada and New York. He also worked on riverboats on the Mississippi River....
  
  , Wisconsin settler, jurist, and sawmill owner
• Jimmy O'Neill (footballer born 1931) (1931–2007), Irish international footballer
• Tip O'Neill (baseball) (1858–1915), Canadian Baseball Hall of Fame inductee

See also

• Jim O'Neill (disambiguation)
• James A. O'Neil
  James A. O'Neil
  James A. O’Neil was an American businessman and politician in the Oregon Country and later Oregon Territory. A New York native, he took part in the Champoeg Meetings and helped form the Provisional Government of Oregon...
  
   (1800–1874), American politician in Oregon
• James O'Neal, pseudonym of writer James O. Born
• James Neal (disambiguation)