| Full name: | Mark Gerard O'Neill |
| Born: | 26th September 1960, Hawera, Taranaki, New Zealand |
| Batting: | Right-hand batter |
| Bowling: | Leg-break and googly |
| Relations: | Brother: PA O'Neill; Brother: KG O'Neill |
| Teams: | Taranaki (Hawke Cup: 1982/83-1994/95); All teams |
| Lists of matches and more detailed statistics | |