Catherine O'Neill (born 28 June 1970) is a New Zealand-born Irish former cricketer who played as a right-arm off break bowler and right-handed batter. She appeared in one Test match and 41 One Day Internationals for Ireland between 1993 and 2003. She also spent a season apiece with Auckland and Northern Districts.
| Format | Matches | Runs | Avg | 100s/50s | Top Score | Wickets | Bowl Avg | Best Bowling | Catches/St |
| WTest | 1 | – | – | – | – | 6 | 4.50 | 3/12 | 0/– |
| WODI | 41 | 438 | 16.84 | 0/0 | 45 | 45 | 22.84 | 4/10 | 6/– |
| WLA | 53 | 494 | 14.96 | 0/0 | 45 | 56 | 23.64 | 4/10 | 7/– |
