Michael O'Neill
Michael O'Neill may refer to:
- Michael O'Neill , British diplomat
- Michael O'Neill , English poet and academic
- Michael O'Neill , American actor
- Michael O'Neill, pioneer in non-profit management education
- Michael O'Neill , Northern Irish football player and manager
- Michael O'Neill , Irish politician
- Michael E. O'Neill, chairman of Citigroup
- Mike O'Neill , American basketball player
- Mike O'Neill , Irish-born American starting pitcher and left fielder in Major League Baseball
- Mike O'Neill , Canadian professional ice hockey goaltender
- Mike O'Neill, three-time All-American lacrosse player
- Mike O'Neill , Canadian singer-songwriter
- Mike O'Neill , English rugby league footballer of the 1970s, 1980s and 1990s
- Mike O'Neill, winner of a 2006 Costume Designers Guild Award
- Michael O'Neill, founder of the Informed Medical Options Party, a minor political party in Australia
- Mikey O'Neill , English footballer