| Iaaf: | KOR |
| Year: | 2013 |
| Games: | World Championships in Athletics |
| Location: | Moscow |
| Competitors: | 16 |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Previous: | 2011 |
| Next: | 2015 |
South Korea is competing at the 2013 World Championships in Athletics in Moscow, Russia, from 10–18 August 2013.A team of 16 athletes was announced to represent the country in the event.
(q – qualified, NM – no mark, SB – season best)
| Athlete | Event | Preliminaries | Heats | Semifinals | Final | ||||
|---|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | Time | Rank | ||
| Minsub Jin Kyu-won Cho Jinkook Kim Kukyoung Kim Kyongsoo Oh Min Woo Yoo | 4 × 100 metres relay | ||||||||
| Jihun Sung | Marathon | ||||||||
| Youngjin Kim | Marathon | ||||||||
| Youngjun Byun | 20 kilometres walk | ||||||||
| Byeong Kwang Choe | 20 kilometres walk | 1:28:26 | 39 | ||||||
| Hyunsub Kim | 20 kilometres walk | 1:22:50 | 9 | ||||||
| Sehan Oh | 50 kilometres walk | ||||||||
| Junghyun Yim | 50 kilometres walk | ||||||||
| Athlete | Event | Preliminaries | Heats | Semifinals | Final | ||||
|---|---|---|---|---|---|---|---|---|---|
| Time | Rank | Time | Rank | Time | Rank | Time | Rank | ||
| Seongeun Kim | Marathon | ||||||||
| Yeongeun Jeon | 20 kilometres walk | ||||||||