1500m Men Heats, Heat:2 of 2 ; Official result since 16:56
Marcus O'Sullivan 3.35.4 (1988)
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 7 | 175 | CAMPBELL Garry | Dunleer A.C. | 3:59.34 | Q | |||
| 2 | 8 | 245 | KIRWAN Cillian | Raheny Shamrock A.C. | 3:59.90 | Q | |||
| 3 | 6 | 160 | ROBINSON Paul | St. Coca's A.C. | 4:00.39 | Q | |||
| 4 | 2 | 89 | HOY Mark | Finn Valley A.C. | 4:00.46 | Q | |||
| 5 | 12 | 8 | LANDERS Damien | Ennis Track A.C. | 4:00.90 | q | |||
| 6 | 3 | 108 | OWENS Richard | Clonliffe Harriers A.C. | 4:02.26 | q | |||
| 7 | 10 | 343 | DYER Michael | North Down AC | 4:04.06 | q | |||
| 8 | 4 | 123 | MCASSEY James | St. L. O'Toole A.C. | 4:04.54 | q | |||
| 9 | 1 | 47 | COLLINS John | Skibbereen A.C. | 4:05.49 | ||||
| 10 | 9 | 340 | GRUMMELL Tim | Sli Cualann A.C. | 4:13.67 | ||||
| 11 | 5 | 137 | FLEMING Paul | Rathfarnham W.S.A.F. A.C. | 4:15.13 | ||||
| 11 | 169 | KEARNS Ronan | Rathfarnham W.S.A.F. A.C. | DNF |