| Hugh O'Neil | |
| Position: | Pitcher |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Place: | Brooklyn, New York, U.S. |
| Debutleague: | MLB |
| Debutdate: | August 20 |
| Debutyear: | 1875 |
| Debutteam: | Brooklyn Atlantics |
| Finalleague: | MLB |
| Finaldate: | October 9 |
| Finalyear: | 1875 |
| Finalteam: | Brooklyn Atlantics |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 0–4 |
| Stat2label: | Earned run average |
| Stat2value: | 5.03 |
| Stat3label: | Strikeouts |
| Stat3value: | 0 |
| Teams: | |
Hugh O'Neil (sometimes referred to as J. O'Neill) was an American professional baseball player who played pitcher for the 1875 Brooklyn Atlantics.