Jack O'Brien is a rower who has competed for Australia. He competed at the 2020 and 2024 Summer Olympic Games.
Olympic Results[]
| Year | Event | Result |
|---|---|---|
| 2020 | Men's eight | 6th |
| 2024 | Men's eight | 6th |
2020[]
| Discipline | Round | Time |
|---|---|---|
| Eight | Round 1 | 5:43.66 |
| Repechage | 5:25.06 | |
| Final | 5:36.23 |
2024[]
| Discipline | Round | Time |
|---|---|---|
| Eight | Round 1 | 5:42.07 |
| Repechage | 5:31.50 | |
| Final | 5:31.79 |
 Australia
|
Rowing 2020 | Men's eight |
|---|---|---|
| Joshua Booth | Angus Dawson | Simon Keenan |
| Nicholas Lavery | Timothy Masters | Joseph O'Brien |
| Nicholas Purnell | Stuart Sim | Angus Widdicombe |
| Australia
|
Rowing 2024 | Men's eight |
|---|---|---|
| Kendall Brodie | Ben Canham | Angus Dawson |
| Jack Hargreaves | Joshua Hicks | Jack O'Brien |
| Alexander Purnell | Spencer Turrin | Angus Widdicombe |