| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | WIND | 
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 827 | Adam GEMILI |  GBR | 20.06 Q SB | +0.5 | |
| 2 | 1 | 3 | 625 | Alex QUIÑÓNEZ |  ECU | 20.08 Q | +0.8 | |
| 3 | 1 | 5 | 397 | Aaron BROWN |  CAN | 20.10 Q | +1.0 | |
| 4 | 2 | 5 | 826 | Miguel FRANCIS |  GBR | 20.11 Q | +1.0 | |
| 5 | 1 | 4 | 1750 | Kyle GREAUX |  TTO | 20.19 Q | +0.7 | |
| 6 | 1 | 2 | 475 | Zhenye XIE |  CHN | 20.20 Q | .199 | +0.5 | 
| 7 | 1 | 6 | 400 | Andre DE GRASSE |  CAN | 20.20 Q | .200 | +0.9 | 
| 8 | 1 | 7 | 1751 | Jereem RICHARDS |  TTO | 20.23 Q | .229 | +0.2 | 
| 8 | 2 | 3 | 1153 | Yohan BLAKE |  JAM | 20.23 Q SB | .229 | +0.8 | 
| 10 | 2 | 2 | 841 | Zharnel HUGHES |  GBR | 20.24 Q SB | +0.5 | |
| 11 | 2 | 7 | 1913 | Noah LYLES |  USA | 20.26 Q | +0.2 | |
| 12 | 2 | 1 | 1775 | Ramil GULIYEV |  TUR | 20.27 Q | +0.5 | |
| 13 | 2 | 6 | 1636 | Clarence MUNYAI |  RSA | 20.29 Q | +0.9 | |
| 14 | 3 | 2 | 1626 | Anaso JOBODWANA |  RSA | 20.35 Q SB | +0.5 | |
| 15 | 3 | 5 | 1156 | Rasheed DWYER |  JAM | 20.37 Q | .365 | +1.0 | 
| 16 | 3 | 1 | 1424 | Taymir BURNET |  NED | 20.37 Q | .370 | +0.5 | 
| 17 | 3 | 7 | 399 | Brendon RODNEY |  CAN | 20.38 Q | +0.2 | |
| 18 | 3 | 6 | 1823 | Serhiy SMELYK |  UKR | 20.39 Q | +0.9 | |
| 19 | 4 | 1 | 1460 | Divine ODUDURU |  NGR | 20.40 q | .392 | +0.5 | 
| 20 | 3 | 3 | 1681 | Alex WILSON |  SUI | 20.40 Q | .396 | +0.8 | 
| 21 | 4 | 7 | 1157 | Andre EWERS |  JAM | 20.41 q | +0.2 | |
| 22 | 4 | 5 | 1087 | Eseosa Fostine DESALU |  ITA | 20.43 q | +1.0 | |
| 23 | 4 | 3 | 320 | Aldemir JUNIOR |  BRA | 20.44 | +0.8 | |
| 24 | 4 | 2 | 1225 | Yuki KOIKE |  JPN | 20.46 | +0.5 | |
| 25 | 2 | 4 | 620 | Yancarlos MARTÍNEZ |  DOM | 20.47 Q | +0.7 | |
| 26 | 5 | 2 | 1335 | Fahhad Mohammed Alsubaie |  KSA | 20.51 | +0.5 | |
| 27 | 3 | 4 | 565 | Reynier MENA |  CUB | 20.52 Q | +0.7 | |
| 28 | 4 | 6 | 2040 | Sydney SIAME |  ZAM | 20.58 | +0.9 | |
| 29 | 4 | 4 | 1653 | Jeremy Dodson |  SAM | 20.60 | +0.7 | |
| 30 | 5 | 6 | 1229 | Kirara SHIRAISHI |  JPN | 20.62 | .613 | +0.9 | 
| 31 | 5 | 5 | 1226 | Jun YAMASHITA |  JPN | 20.62 | .620 | +1.0 | 
| 32 | 5 | 7 | 766 | Mouhamadou FALL |  FRA | 20.63 | +0.2 | |
| 33 | 5 | 4 | 530 | Bernardo BALOYES |  COL | 20.64 | +0.7 | |
| 34 | 6 | 6 | 2068 | Steven MÜLLER |  GER | 20.69 | +0.9 | |
| 35 | 6 | 7 | 815 | Guy MAGANGA GORRA |  GAB | 20.74 | +0.2 | |
| 36 | 5 | 1 | 325 | Paulo André CAMILO |  BRA | 20.75 | .745 | +0.5 | 
| 37 | 6 | 5 | 1600 | Abdelaziz MOHAMED |  QAT | 20.75 SB | .750 | +1.0 | 
| 38 | 5 | 3 | 1748 | Chun-Han YANG |  TPE | 20.80 | +0.8 | |
| 39 | 6 | 3 | 1351 | Noureddine HADID |  LBN | 20.84 NR | +0.8 | |
| 40 | 7 | 6 | 1729 | Sibusiso MATSENJWA |  SWZ | 20.85 | +0.9 | |
| 41 | 6 | 4 | 525 | Emmanuel ESEME |  CMR | 20.87 | +0.7 | |
| 42 | 7 | 3 | 1101 | Antonio INFANTINO |  ITA | 20.89 | +0.8 | |
| 43 | 6 | 1 | 1927 | Rodney ROWE |  USA | 20.92 | +0.5 | |
| 44 | 7 | 5 | 1453 | Emmanuel Arowolo |  NGR | 21.07 | +1.0 | |
| 45 | 7 | 1 | 1410 | Fodé SISSOKO |  MLI | 21.30 | +0.5 | |
| 46 | 7 | 4 | 1865 | Kenneth BEDNAREK |  USA | 21.50 | +0.7 | |
| 47 | 6 | 2 | 645 | José Andrés SALAZAR |  ESA | 21.64 | +0.5 | |
| 48 | 7 | 2 | 382 | Muhd Noor Firdaus AR RASYID |  BRU | 21.99 | +0.5 | |
| 49 | 8 | 6 | 2039 | Ahmed AL YAARI |  YEM | 22.37 NR | +0.9 | |
| 50 | 8 | 3 | 1592 | Gregory Bradai |  PYF | 22.79 SB | +0.8 | |
| 1 | 2052 | Terrence JONES |  BAH | DQ | ||||
| 5 | 1699 | Jeffrey Vanan |  SUR | DQ | ||||
| 7 | 1513 | Alonso EDWARD |  PAN | DNS | 
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second