400m Jun Men, Heat:2 of 4 ; Official result
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 5 | 133 | LOCKE Cathal | Dooneen A.C. | 50.20 | Q | |||
| 2 | 6 | 106 | HOLDEN James | Dundrum South Dublin A.C. | 51.84 | ||||
| 3 | 3 | 312 | KIERNAN Brian | Ratoath A.C. | 52.29 | ||||
| 4 | 4 | 171 | VERMEER Jake | Carrick-on-Suir A.C. | 53.40 | ||||
| 5 | 2 | 42 | HERITY Conor | North Sligo A.C. | 54.76 |