| 1 | Charles Nkazamyampi | BDI | 1:48,17 | Q | |
| 2 | José Luíz Barbosa | BRA | 1:48,56 | Q | |
| 3 | Mbiganyi Thee | BOT | 1:48,95 | NR | |
| 4 | Jack Armour | USA | 1:49,03 | ||
| 5 | Giuseppe d'Urso | ITA | 1:50,07 | ||
| 6 | Pablo Squella | CHI | 1:50,25 |
| 1 | Tom McKean | GBR | 1:47,05 | Q | |
| 2 | Freddie Williams | CAN | 1:47,93 | Q | |
| 3 | Nico Motchebon | GER | 1:47,98 | q | |
| 4 | Luc Bernaert | BEL | 1:48,24 | q | |
| 5 | Kennedy Osei | GHA | 1:49,80 | NR | |
| 6 | Lee Jin-Il | KOR | 1:50,46 |