| POS | Rank | Heat | BIB | ATHLETE | COUNTRY | RESULTS | ms* | WIND |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 3007 | Noah LYLES |
USA |
19.76 Q | -0.1 | |
| 2 | 1 | 2 | 2969 | Kenneth BEDNAREK |
USA |
19.96 Q | 0.0 | |
| 3 | 2 | 2 | 2102 | Letsile TEBOGO |
BOT |
19.97 Q | 0.0 | |
| 4 | 1 | 3 | 3003 | Erriyon KNIGHTON |
USA |
19.98 Q | -0.4 | |
| 5 | 2 | 3 | 2350 | Zharnel HUGHES |
GBR |
20.02 Q | .014 | -0.4 |
| 6 | 2 | 1 | 2221 | Alexander OGANDO |
DOM |
20.02 Q | .017 | -0.1 |
| 7 | 3 | 3 | 2140 | Andre DE GRASSE |
CAN |
20.10 q | -0.4 | |
| 8 | 4 | 3 | 2644 | Joseph FAHNBULLEH |
LBR |
20.21 q | -0.4 | |
| 9 | 3 | 2 | 3006 | Courtney LINDSEY |
USA |
20.22 | 0.0 | |
| 10 | 3 | 1 | 2948 | Tarsis Gracious OROGOT |
UGA |
20.26 | -0.1 | |
| 11 | 4 | 1 | 2155 | Brendon RODNEY |
CAN |
20.27 | -0.1 | |
| 12 | 4 | 2 | 2824 | Sinesipho DAMBILE |
RSA |
20.28 PB | 0.0 | |
| 13 | 5 | 3 | 2598 | Towa UZAWA |
JPN |
20.33 | -0.4 | |
| 14 | 5 | 1 | 2545 | Andrew HUDSON |
JAM |
20.38 qR | -0.1 | |
| 15 | 5 | 2 | 2109 | Renan CORREA |
BRA |
20.43 | 0.0 | |
| 16 | 6 | 1 | 2821 | Luxolo ADAMS |
RSA |
20.44 | -0.1 | |
| 17 | 6 | 3 | 2539 | Rasheed DWYER |
JAM |
20.49 | -0.4 | |
| 18 | 7 | 1 | 2568 | Shota IIZUKA |
JPN |
20.54 | -0.1 | |
| 19 | 6 | 2 | 2701 | Taymir BURNET |
NED |
20.65 | .643 | 0.0 |
| 20 | 7 | 3 | 2829 | Shaun MASWANGANYI |
RSA |
20.65 | .646 | -0.4 |
| 21 | 8 | 3 | 2880 | William REAIS |
SUI |
20.67 | -0.4 | |
| 22 | 8 | 1 | 2208 | Ondřej MACÍK |
CZE |
20.71 | -0.1 | |
| 23 | 7 | 2 | 2715 | Alaba Olukunle AKINTOLA |
NGR |
20.75 | 0.0 | |
| 2 | 2138 | Aaron BROWN |
CAN |
DQ |
ms - Milliseconds - shown when two or more competitors finish with the same time down to hundredths of a second