| Henry O'Neill | |
| Birth Date: | 27 December 1964[1] |
| Birth Place: | Belfast, Northern Ireland |
| Hometown: | Derry, Northern Ireland |
| Since: | 1990 |
| Darts: | 22g |
| Laterality: | Right-handed |
| Bdo: | 2008–2014 |
| Pdc: | 2002–2008 |
| World Masters: | Last 192: 2003 |
| Pdc World: | Last 48: 2004 |
| Uk Open: | Last 32: 2003, 2004 |
| Tournament: | Northern Irish National Championship |
| Resultyears: | 2003 |
Henry O'Neill (born 27 December 1964) is a former Northern Irish professional darts player who played in Professional Darts Corporation (PDC) events.
O'Neill played in the 2004 PDC World Darts Championship, losing in the last 48 to Robbie Widdows of England.