| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | WIND |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 415 | Letsile TEBOGO |
BOT |
19.96 Q | -0.2 | |
| 2 | 1 | 1 | 1292 | Kenneth BEDNAREK |
USA |
20.00 Q | -0.1 | |
| 3 | 2 | 2 | 1328 | Noah LYLES |
USA |
20.08 Q | -0.2 | |
| 4 | 2 | 1 | 561 | Alexander OGANDO |
DOM |
20.09 Q | .088 | -0.1 |
| 5 | 1 | 3 | 1323 | Erriyon KNIGHTON |
USA |
20.09 Q | .089 | -0.6 |
| 6 | 2 | 3 | 1005 | Joseph FAHNBULLEH |
LBR |
20.12 Q | -0.6 | |
| 7 | 3 | 3 | 1380 | Tapiwanashe MAKARAWU |
ZIM |
20.16 q | -0.6 | |
| 8 | 3 | 2 | 1379 | Makanakaishe CHARAMBA |
ZIM |
20.31 q | -0.2 | |
| 9 | 4 | 2 | 850 | Eseosa Fostine DESALU |
ITA |
20.37 | -0.2 | |
| 10 | 3 | 1 | 453 | Andre DE GRASSE |
CAN |
20.41 | -0.1 | |
| 11 | 4 | 1 | 1181 | Shaun MASWANGANYI |
RSA |
20.42 | -0.1 | |
| 12 | 5 | 2 | 746 | Joshua HARTMANN |
GER |
20.47 | -0.2 | |
| 13 | 6 | 2 | 952 | Towa UZAWA |
JPN |
20.54 | .532 | -0.2 |
| 14 | 4 | 3 | 875 | Filippo TORTU |
ITA |
20.54 | .538 | -0.6 |
| 15 | 7 | 2 | 452 | Aaron BROWN |
CAN |
20.57 | -0.2 | |
| 16 | 5 | 3 | 466 | Brendon RODNEY |
CAN |
20.59 | -0.6 | |
| 17 | 6 | 3 | 421 | Renan CORREA |
BRA |
20.60 | -0.6 | |
| 18 | 5 | 1 | 364 | Wanya MCCOY |
BAH |
20.61 | -0.1 | |
| 19 | 6 | 1 | 1276 | Tarsis Gracious OROGOT |
UGA |
20.64 | -0.1 | |
| 20 | 7 | 3 | 1086 | Udodi Chudi ONWUZURIKE |
NGR |
20.72 | .717 | -0.6 |
| 20 | 7 | 3 | 1194 | Wayde VAN NIEKERK |
RSA |
20.72 | .717 | -0.6 |
| 22 | 7 | 1 | 679 | Ryan ZEZE |
FRA |
20.81 | -0.1 | |
| 23 | 8 | 2 | 1235 | Erik ERLANDSSON |
SWE |
20.93 | .922 | -0.2 |
| 24 | 8 | 1 | 903 | Bryan LEVELL |
JAM |
20.93 | .924 | -0.1 |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second