| Iaaf: | KOR |
| Year: | 2019 |
| Games: | World Athletics Championships |
| Location: | Doha, Qatar |
| Competitors: | 4 |
| Events: | 3 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
South Korea competed at the 2019 World Athletics Championships in Doha, Qatar, from 27 September to 6 October 2019.[1]
| Athlete | Event | Preliminary Round | Heat | Semifinal | Final | ||||
|---|---|---|---|---|---|---|---|---|---|
| Result | Rank | Result | Rank | Result | Rank | Result | Rank | ||
| style=text-align:left | Kim Kuk-young | style=text-align:left | 100 metres | 10.32 | 2 Q | 10.32 | 32 | colspan=4 | |
| style=text-align:left | Choe Byeong-kwang | style=text-align:left rowspan=2 | 20 kilometres walk | 1:33:10 | 21 | ||||
| style=text-align:left | Kim Hyun-sub | 1:42:13 | 37 | ||||||