Sejin Son
South KoreaActive- Born
- Jan 17, 2003 (23 years old)
- Events
- Marathon · Half Marathon
Sejin Son is a South Korea middle-distance runner, born on January 17, 2003. He competes primarily in the 800m, 1500m and 5000m.
His personal bests include 1:58.96 in the 800m, 3:58.04 in the 1500m, 14:29.13 in the 5000m, 30:39.51 in the 10000m and 1:06:45 in the Semi. He is currently active on the international athletics circuit, representing South Korea.
Personal best · Marathon2:17:57
2026 season best2:17:57Mar 15, 2026 · Seoul
Personal best · Half Marathon1:06:45
Last competition80th Korean ChampionshipsMay 12, 2026 · 14:51.36
As of Oct 27, 2026: Marathon 2:17:57, Half Marathon 1:06:45, 2026 season best 2:17:57 (Mar 15, 2026, Seoul (KOR)) · Last competition: 80th Korean Championships, May 12, 2026, 14:51.36 · 23 years old
Personal bests
WA points calculator →Progression
| Season | Discipline | Result | Wind | Date | Competitions |
|---|---|---|---|---|---|
| 2026 | 5000m | 14:51.36 | – | May 12, 2026 | 80th Korean Championships |
| 2026 | Marathon | 2:17:57 | – | Mar 15, 2026 | Seoul Marathon |
| 2025 | 5000m | 14:29.13 | – | Oct 19, 2025 | 106th National Sports Festival, Busan Asiad Stadium, Busan |
| 2025 | 10000m | 30:39.51 | – | Apr 1, 2025 | 80th National University Athletics Championships |
| 2025 | Semi | 1:06:45 | – | Feb 2, 2025 | 77th Kagawa Marugame International Half Marathon, Marugame |
| 2025 | Marathon | 2:19:42 | – | Nov 2, 2025 | JTBC Seoul Marathon, Seoul |
| 2024 | 1500m | 4:03.95 | – | May 7, 2024 | 52nd Flag of KBS National Athletics Meeting, Yecheon Stadium, Yecheon |
| 2024 | 5000m | 14:47.49 | – | Oct 13, 2024 | 105th National Sports Festival, Gimhae Stadium, Gimhae |