| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | WIND |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 3 | 1425 | Andre DE GRASSE |
CAN |
19.73 Q NR | +0.2 | |
| 2 | 2 | 3 | 3905 | Kenneth BEDNAREK |
USA |
19.83 Q | +0.2 | |
| 3 | 1 | 2 | 1423 | Aaron BROWN |
CAN |
19.99 Q SB | .982 | -0.4 |
| 4 | 2 | 2 | 2848 | Joseph FAHNBULLEH |
LBR |
19.99 Q NR | .982 | -0.4 |
| 5 | 3 | 2 | 3950 | Noah LYLES |
USA |
19.99 q | .983 | -0.4 |
| 6 | 1 | 1 | 3944 | Erriyon KNIGHTON |
USA |
20.02 Q | -0.2 | |
| 7 | 3 | 3 | 3634 | Jereem RICHARDS |
TTO |
20.10 q SB | +0.2 | |
| 8 | 2 | 1 | 2572 | Rasheed DWYER |
JAM |
20.13 Q SB | -0.2 | |
| 9 | 3 | 1 | 3060 | Divine ODUDURU |
NGR |
20.16 | -0.2 | |
| 10 | 4 | 3 | 3418 | Shaun MASWANGANYI |
RSA |
20.18 | +0.2 | |
| 11 | 5 | 3 | 3580 | Sibusiso MATSENJWA |
SWZ |
20.22 NR | +0.2 | |
| 12 | 4 | 2 | 1686 | Yancarlos MARTÍNEZ |
DOM |
20.24 | -0.4 | |
| 13 | 4 | 1 | 2196 | Joseph Paul AMOAH |
GHA |
20.27 SB | -0.2 | |
| 14 | 6 | 3 | 3670 | Ramil GULIYEV |
TUR |
20.31 SB | +0.2 | |
| 15 | 5 | 1 | 3294 | Femi OGUNODE |
QAT |
20.34 | -0.2 | |
| 16 | 6 | 1 | 2419 | Eseosa Fostine DESALU |
ITA |
20.43 | -0.2 | |
| 17 | 5 | 2 | 3524 | William REAIS |
SUI |
20.44 SB | -0.4 | |
| 18 | 7 | 1 | 1508 | Zhenye XIE |
CHN |
20.45 | -0.2 | |
| 19 | 6 | 2 | 3426 | Clarence MUNYAI |
RSA |
20.49 =SB | -0.4 | |
| 20 | 7 | 3 | 2349 | Leon REID |
IRL |
20.54 | +0.2 | |
| 21 | 8 | 1 | 3408 | Anaso JOBODWANA |
RSA |
20.88 | -0.2 | |
| 22 | 8 | 3 | 3016 | Taymir BURNET |
NED |
20.90 | +0.2 | |
| 23 | 7 | 2 | 1203 | Robin VANDERBEMDEN |
BEL |
21.00 | -0.4 | |
| 2 | 3125 | Alonso EDWARD |
PAN |
DNF |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second