| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | 
|---|---|---|---|---|---|---|---|
| 1 | 1 | 3 | 1507 | Slimane MOULA |  ALG | 1:44.89 Q | |
| 2 | 2 | 3 | 1637 | Marco AROP |  CAN | 1:45.12 Q | |
| 3 | 1 | 1 | 2094 | Emmanuel Kipkurui KORIR |  KEN | 1:45.38 Q SB | |
| 4 | 3 | 3 | 2103 | Emmanuel WANYONYI |  KEN | 1:45.42 q | |
| 5 | 1 | 2 | 1508 | Djamel SEDJATI |  ALG | 1:45.44 Q | |
| 6 | 2 | 1 | 2093 | Wyclife KINYAMAL |  KEN | 1:45.49 Q | |
| 7 | 2 | 2 | 1847 | Gabriel TUAL |  FRA | 1:45.53 Q | |
| 8 | 3 | 1 | 1527 | Peter BOL |  AUS | 1:45.58 q | |
| 9 | 4 | 3 | 1845 | Benjamin ROBERT |  FRA | 1:45.67 | |
| 10 | 5 | 3 | 1975 | Mark ENGLISH |  IRL | 1:45.78 | |
| 11 | 4 | 1 | 1878 | Kyle LANGFORD |  GBR | 1:45.91 | |
| 12 | 6 | 3 | 2323 | Abdessalem AYOUNI |  TUN | 1:46.08 | |
| 13 | 5 | 1 | 2146 | Jesus Tonatiu LOPEZ |  MEX | 1:46.17 | |
| 14 | 3 | 2 | 1887 | Daniel ROWDEN |  GBR | 1:46.27 | |
| 15 | 7 | 3 | 1762 | Álvaro DE ARRIBA |  ESP | 1:46.30 | |
| 16 | 4 | 2 | 2011 | Catalin TECUCEANU |  ITA | 1:46.31 | |
| 17 | 8 | 3 | 2128 | Abdelati EL GUESSE |  MAR | 1:46.46 | |
| 18 | 5 | 2 | 1764 | Mariano GARCÍA |  ESP | 1:46.70 | .692 | 
| 19 | 6 | 1 | 2169 | Tony VAN DIEPEN |  NED | 1:46.70 | .700 | 
| 20 | 6 | 2 | 2300 | Andreas KRAMER |  SWE | 1:46.71 | |
| 21 | 7 | 2 | 2086 | Noah KIBET |  KEN | 1:47.15 | |
| 22 | 7 | 1 | 2130 | Elhassane MOUJAHID |  MAR | 1:47.18 | |
| 23 | 8 | 1 | 1792 | Tolesa BODENA |  ETH | 1:50.55 | |
| 2 | 2135 | Moad ZAHAFI |  MAR | DQ | 
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second