400m Jun Men, Heat:2 of 3 ; Official result since 12:23
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 6 | 36 | CARROLL Fionn | Tallaght A.C. | 50.78 | Q | |||
| 2 | 2 | 18 | IRWIN Shane | Finn Valley A.C. | 50.97 | q | |||
| 3 | 3 | 37 | ESSUMAN Simon | Tallaght A.C. | 51.22 | q | |||
| 4 | 5 | 271 | HOLDEN James | Dundrum South Dublin A.C. | 52.65 | ||||
| 5 | 4 | 274 | TOWNSEND Seán | Lucan Harriers A.C. | 54.29 | ||||
| 6 | 1 | 323 | LALOR Louis | Sli Cualann A.C. | 56.69 |