Mark O'Neill
# Mark O'Neill

Mark O'Neill may refer to:

* Mark O'Neill (rugby league) (born 1975), Australian rugby league footballer of the 1990s and 2000s
* Mark A. O'Neill (born 1959), British entomologist and computer scientist
* Mark O'Neill (TV personality) (born 1984), Irish television personality and producer
* Mark O'Neill (cricketer) (born 1959), Australian cricketer
