James or Jimmy O'Neill may refer to:
- James O'Neill (actor, born 1847) (1847–1920), father of the playwright Eugene O'Neill
- James O'Neill (actor, born 1863) (1863–1938), vaudeville and early film actor
- James E. O'Neill (1929–1987), American acting Archivist for the National Archives
- James O'Neill (baseball) (died 1993), 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) (died 1922), founder of the Knights of Saint Columbanus
- James O'Neill (jurist) (1847–1929), American jurist and politician
- James O'Neill (Wisconsin settler) (1810–1882), American settler, politician, and sawmill owner
- James Ryan O'Neill (born 1947), Australian serial killer
- Jimmy O'Neill (footballer, born 1931) (1931–2007), Irish international footballer
- James P. O'Neill (born 1950s), New York City police commissioner
- James R. O'Neill (1833–1863), American Civil War artist and correspondent
- Jamie O'Neill (born 1962), Irish author
- Tip O'Neill (baseball) (1860–1915), Canadian Baseball Hall of Fame inductee
- James Hugh O'Neill (1892–1972), American Catholic priest
- James E. O'Neill Jr. (1929–2002), Michigan politician
See also
- Jim O'Neill (disambiguation)
- James A. O'Neil (1800–1874), American politician in Oregon
- James O'Neil Mayne (died 1939), Australian philanthropist
- James O'Neal, pseudonym of writer James O. Born
- James Neal (disambiguation)
Topics referred to by the same termThis disambiguation page lists articles about people with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: