400m Jun Men ; Official result since 17:29
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 5 | 14 | O'DONNELL Christopher | North Sligo A.C. | 48.89 | ||||
| 2 | 6 | 224 | LOCKE Cathal | Dooneen A.C. | 49.11 | ||||
| 3 | 4 | 36 | CARROLL Fionn | Tallaght A.C. | 49.84 | ||||
| 4 | 2 | 37 | ESSUMAN Simon | Tallaght A.C. | 50.14 | ||||
| 5 | 3 | 18 | MITCHELL Jack | St. L. O'Toole A.C. | 50.34 | ||||
| 6 | 1 | 203 | IRWIN Shane | Finn Valley A.C. | 50.57 |