| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | 
|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 2629 | Emmanuel WANYONYI |  KEN | 1:44.92 Q | |
| 2 | 1 | 7 | 2134 | Marco AROP |  CAN | 1:45.05 Q | |
| 3 | 2 | 1 | 2329 | Gabriel TUAL |  FRA | 1:45.10 Q | |
| 4 | 2 | 7 | 2489 | Simone BARONTINI |  ITA | 1:45.21 Q | |
| 5 | 1 | 6 | 2660 | Abdelati EL GUESSE |  MAR | 1:45.24 Q | |
| 6 | 3 | 7 | 2318 | Yanis MEZIANE |  FRA | 1:45.30 Q | |
| 7 | 3 | 1 | 2520 | Catalin TECUCEANU |  ITA | 1:45.31 Q | |
| 8 | 1 | 4 | 2237 | Adrián BEN |  ESP | 1:45.37 Q | |
| 9 | 1 | 2 | 2766 | Mateusz BORKOWSKI |  POL | 1:45.40 Q | |
| 10 | 2 | 6 | 2896 | Andreas KRAMER |  SWE | 1:45.42 Q | |
| 11 | 2 | 2 | 2341 | Max BURGIN |  GBR | 1:45.43 Q | |
| 12 | 3 | 2 | 2036 | Joseph DENG |  AUS | 1:45.48 Q | |
| 13 | 2 | 4 | 2995 | Bryce HOPPEL |  USA | 1:45.56 Q | |
| 14 | 4 | 1 | 2098 | Tshepiso MASALELA |  BOT | 1:45.60 q | |
| 15 | 3 | 4 | 2358 | Daniel ROWDEN |  GBR | 1:45.67 Q | |
| 16 | 4 | 2 | 2471 | Mark ENGLISH |  IRL | 1:45.71 q SB | |
| 17 | 4 | 4 | 2781 | Filip OSTROWSKI |  POL | 1:45.76 q | .755 | 
| 17 | 3 | 6 | 2009 | Slimane MOULA |  ALG | 1:45.76 Q | .755 | 
| 19 | 4 | 6 | 2510 | Francesco PERNICI |  ITA | 1:45.89 | |
| 20 | 4 | 7 | 2294 | Joonas RINNE |  FIN | 1:45.93 | |
| 21 | 5 | 2 | 2748 | Brad MATHAS |  NZL | 1:45.95 | |
| 22 | 5 | 4 | 2144 | Abdullahi HASSAN |  CAN | 1:46.33 | |
| 23 | 1 | 5 | 2325 | Benjamin ROBERT |  FRA | 1:46.45 Q | |
| 24 | 6 | 4 | 2627 | Ferguson Cheruiyot ROTICH |  KEN | 1:46.53 | |
| 25 | 2 | 5 | 2356 | Ben PATTISON |  GBR | 1:46.57 Q | |
| 26 | 7 | 4 | 2190 | Marino BLOUDEK |  CRO | 1:46.63 | |
| 27 | 3 | 5 | 2236 | Mohamed ATTAOUI |  ESP | 1:46.65 Q | |
| 28 | 5 | 6 | 2033 | Peter BOL |  AUS | 1:46.75 | |
| 29 | 4 | 5 | 2621 | Emmanuel Kipkurui KORIR |  KEN | 1:46.78 SB | |
| 30 | 6 | 6 | 2749 | James PRESTON |  NZL | 1:46.84 | |
| 31 | 5 | 5 | 2924 | Abdessalem AYOUNI |  TUN | 1:46.85 | |
| 32 | 7 | 6 | 3049 | Handal ROBAN |  VIN | 1:46.86 | |
| 33 | 6 | 5 | 3015 | Clayton MURPHY |  USA | 1:47.06 | |
| 34 | 5 | 7 | 2447 | Balázs VINDICS |  HUN | 1:47.18 | |
| 35 | 6 | 2 | 2427 | Dániel HULLER |  HUN | 1:47.41 | |
| 36 | 1 | 3 | 2617 | Alex Ngeno KIPNGETICH |  KEN | 1:47.63 Q | |
| 37 | 6 | 7 | 2121 | Eduardo RIBEIRO |  BRA | 1:47.75 | |
| 38 | 7 | 5 | 2092 | Abedin MUJEZINOVIĆ |  BIH | 1:47.76 | |
| 39 | 7 | 7 | 2664 | Oussama NABIL |  MAR | 1:47.79 | |
| 40 | 2 | 3 | 2010 | Djamel SEDJATI |  ALG | 1:47.87 Q | |
| 41 | 3 | 3 | 2256 | Saúl ORDÓÑEZ |  ESP | 1:47.97 Q | |
| 42 | 8 | 7 | 3056 | Abdullah Mohammed AL YAARI |  YEM | 1:47.98 PB | |
| 43 | 4 | 3 | 2990 | Isaiah HARRIS |  USA | 1:48.00 | |
| 44 | 5 | 3 | 2474 | John FITZSIMONS |  IRL | 1:48.20 | |
| 45 | 5 | 1 | 2809 | Ryan SÁNCHEZ |  PUR | 1:48.24 | |
| 46 | 8 | 6 | 2182 | Alex BEDDOES |  COK | 1:48.31 | |
| 47 | 8 | 5 | 2048 | Riley MCGOWN |  AUS | 1:48.38 | |
| 48 | 6 | 3 | 2638 | Ebrahim ALZOFAIRI |  KUW | 1:48.41 | |
| 49 | 7 | 2 | 2941 | Tom DRADRIGA |  UGA | 1:48.60 | |
| 50 | 7 | 3 | 2808 | John RIVERA |  PUR | 1:48.83 | |
| 51 | 8 | 3 | 2094 | Amel TUKA |  BIH | 1:49.01 | |
| 52 | 6 | 1 | 2006 | Mohamed Ali GOUANED |  ALG | 1:49.16 | |
| 53 | 7 | 1 | 2454 | Krishan KUMAR |  IND | 1:50.36 | |
| 54 | 9 | 3 | 2670 | Allan Ngitsi CHIRWA |  MAW | 1:51.62 PB | |
| 55 | 8 | 4 | 2740 | Ole Jakob SOLBU |  NOR | 1:51.66 | |
| 56 | 8 | 1 | 2691 | Hein Htet AUNG |  MYA | 1:53.63 PB | |
| 57 | 9 | 7 | 2763 | Mohammed DWEDAR |  PLE | 1:55.45 PB | |
| 58 | 9 | 1 | 2909 | Manuel ATAIDE |  TLS | 1:58.32 | |
| 59 | 9 | 6 | 2028 | Justice DREISCHOR |  ARU | 1:59.56 | |
| 60 | 9 | 5 | 2361 | Faustino PRIETO ALFARO |  GEQ | 2:04.20 PB | |
| 2 | 2528 | Navasky ANDERSON |  JAM | DQ | 
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second