| Name | Event | Round | Time | |
|---|---|---|---|---|
| 1 | Robert Powell | 100 L Free | Semifinals | 50.36 |
| 2 | Jack Mc Millan | 200 L Free | Prelims | 1:49.57 |
| 3 | Jack Mc Millan | 200 L Free | Semifinals | 1:49.89 |
| 4 | Robert Powell | 100 L Free | Prelims | 50.81 |
| 5 | Jack Mc Millan | 100 L Free | Semifinals | 50.88 |
| 6 | Jack Mc Millan | 100 L Free | Prelims | 51.16 |
| 7 | Finn Mc Geever | 400 L Free | Prelims | 4:01.24 |
| 8 | Finn Mc Geever | 200 L Fly | Prelims | 2:03.71 |
| 9 | Robert Powell | 200 L Free | Prelims | 1:53.49 |
| 10 | Cadan Mc Carthy | 400 L IM | Prelims | 4:31.43 |
| Name | Event | Round | Time | |
|---|---|---|---|---|
| 1 | Swim Ireland | 800 L Free Relay | Prelims | |
| Name | Gold | Silver | Bronze | Score | FINA | |
|---|---|---|---|---|---|---|
| 1 | Jack Mc Millan | 0 | 0 | 0 | – | 764.6 |
| 2 | Robert Powell | 0 | 0 | 0 | – | 739.3 |
| 3 | Finn Mc Geever | 0 | 0 | 0 | – | 735.7 |
| 4 | Cadan Mc Carthy | 0 | 0 | 0 | – | 710.5 |
| 5 | Patrick Johnston | 0 | 0 | 0 | – | 706.7 |
