| Name | Event | Round | Time | |
|---|---|---|---|---|
| 1 | Shane Ryan | 100 L Back | Semifinals | 53.94 |
| 2 | Nicholas Quinn | 200 L Breast | Prelims | 2:12.15 |
| 3 | Shane Ryan | 100 L Back | Prelims | 54.33 |
| 4 | Jordan Sloan | 100 L Free | Prelims | 49.66 |
| 5 | Shane Ryan | 50 L Back | Prelims | 25.48 |
| 6 | Conor Ferguson | 200 L Back | Prelims | 1:59.03 |
| 7 | Jordan Sloan | 200 L Free | Prelims | 1:49.17 |
| 8 | Brendan Hyland | 200 L Fly | Prelims | 1:59.91 |
| 9 | Nicholas Quinn | 100 L Breast | Prelims | 1:01.56 |
| 10 | Brendan Hyland | 100 L Fly | Prelims | 53.80 |
| Name | Event | Round | Time | |
|---|---|---|---|---|
| 1 | Swim Ireland | 400 L Medley Relay | Prelims | |
| Name | Gold | Silver | Bronze | Score | FINA | |
|---|---|---|---|---|---|---|
| 1 | Nicholas Quinn | 0 | 0 | 0 | – | 843.5 |
| 2 | Shane Ryan | 0 | 0 | 0 | – | 833.3 |
| 3 | Conor Ferguson | 0 | 0 | 0 | – | 831.0 |
| 4 | Jordan Sloan | 0 | 0 | 0 | – | 829.5 |
| 5 | Brendan Hyland | 0 | 0 | 0 | – | 799.0 |
