| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | WIND |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 1449 | Isiah YOUNG |
USA |
20.12 Q | +2.1 | |
| 2 | 1 | 2 | 1329 | Jereem RICHARDS |
TTO |
20.14 Q | .138 | -0.3 |
| 3 | 2 | 1 | 708 | Isaac MAKWALA |
BOT |
20.14 Q | .139 | +2.1 |
| 4 | 1 | 3 | 1346 | Ramil GULIYEV |
TUR |
20.17 Q | +0.3 | |
| 5 | 3 | 1 | 969 | Nethaneel MITCHELL-BLAKE |
GBR |
20.19 q | +2.1 | |
| 6 | 2 | 3 | 1443 | Ameer WEBB |
USA |
20.22 Q | +0.3 | |
| 7 | 3 | 3 | 1282 | Wayde VAN NIEKERK |
RSA |
20.28 q | +0.3 | |
| 8 | 4 | 3 | 935 | Christophe LEMAITRE |
FRA |
20.30 | +0.3 | |
| 9 | 5 | 3 | 980 | Daniel Talbot |
GBR |
20.38 | +0.3 | |
| 10 | 2 | 2 | 1118 | Abdul Hakim SANI BROWN |
JPN |
20.43 Q | -0.3 | |
| 11 | 3 | 2 | 1074 | Yohan BLAKE |
JAM |
20.52 | -0.3 | |
| 12 | 4 | 2 | 1457 | Sydney SIAME |
ZAM |
20.54 | -0.3 | |
| 13 | 4 | 1 | 1260 | David Lima |
POR |
20.56 | +2.1 | |
| 14 | 5 | 2 | 1414 | Kyree KING |
USA |
20.59 | -0.3 | |
| 15 | 6 | 2 | 1302 | Ján VOLKO |
SVK |
20.61 | -0.3 | |
| 16 | 5 | 1 | 1107 | Shota IIZUKA |
JPN |
20.62 | .612 | +2.1 |
| 17 | 6 | 1 | 1067 | Filippo TORTU |
ITA |
20.62 | .613 | +2.1 |
| 18 | 7 | 1 | 1281 | Akani SIMBINE |
RSA |
20.62 | .618 | +2.1 |
| 19 | 8 | 1 | 1326 | Kyle GREAUX |
TTO |
20.65 | +2.1 | |
| 20 | 9 | 1 | 1081 | Rasheed DWYER |
JAM |
20.69 | +2.1 | |
| 21 | 6 | 3 | 1024 | Likoúrgos-Stéfanos Tsákonas |
GRE |
20.73 | +0.3 | |
| 22 | 7 | 3 | 1032 | Winston GEORGE |
GUY |
20.74 | +0.3 | |
| 23 | 8 | 3 | 789 | Wilfried Koffi Hua |
CIV |
20.80 | +0.3 | |
| 24 | 7 | 2 | 962 | Zharnel HUGHES |
GBR |
20.85 | -0.3 | |
| 25 | 8 | 2 | 1299 | Alex WILSON |
SUI |
21.22 | -0.3 |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second