Michael O'Neill
Michael O'Neill may refer to:
- Michael O'Neill (diplomat) (born 1965), British diplomat
- Michael O'Neill (academic) (born 1953), English poet and academic
- Michael O'Neill (actor), American actor
- Michael O'Neill (educator), pioneer in non-profit management education
- Michael O'Neill (footballer) (born 1969), Northern Irish former footballer
- Michael O'Neill (politician) (1909–1976), Irish politician
- Michael E. O'Neill (born c. 1948), chairman of Citigroup
- Mike O'Neill, winner of a 2006 Costume Designers Guild Award
- Mike O'Neill (baseball) (1877–1959), starting pitcher and left fielder in Major League Baseball
- Mike O'Neill (ice hockey) (born 1967), retired professional ice hockey goaltender
- Mike O'Neill (lacrosse), three-time All-American lacrosse player
- Mike O'Neill (musician), Canadian singer-songwriter
- Mike O'Neill (rugby league) (born 1960), English rugby league footballer of the 1970s, '80s and '90s
See also
- Michael O'Neal (born 1951), American lawyer and Republican politician
- Mickey O'Neil, fictional character from the 2000 film Snatch
- Mickey O'Neil (baseball) (1900–1964), former professional baseball