James, Jamie, or Jimmy O'Neill may refer to:
Arts and entertainment James R. O'Neill (1833–1863), American Civil War artist and correspondent James O'Neill (actor, born 1847) (1847–1920), Irish-American theater actor James O'Neill (actor, born 1863) (1863–1938), American vaudeville and early film actor Jamie O'Neill (born 1962), Irish novelist
Law and politics James O'Neill (Wisconsin settler) (1810–1882), American settler, politician, and sawmill owner 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 (jurist) (1847–1929), American jurist and politician James E. O'Neill Jr. (1929–2002), American politician in Michigan
Sports Tip O'Neill (baseball) (James Edward O'Neill, 1860–1915), Canadian baseball player Jimmy O'Neill (footballer, born 1931) (1931–2007), Irish international footballer James O'Neill (baseball) (died 1993), American baseball and basketball player James O'Neill (rugby union), Irish international rugby union player
Others James Hugh O'Neill (1892–1972), American Catholic priest James O'Neill (priest) (died 1922), Irish founder of the Knights of Saint Columbanus James E. O'Neill (1929–1987), American acting Archivist for the National Archives James Ryan O'Neill (born 1947), Australian serial killer James P. O'Neill (born 1950s), American police commissioner in New York City
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)