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Squad of South Korea for World Cup U-20 2017
| # | | | | Player | | Height | |
Age | | | Position |
Team |
| | 1 | |
| |
Song, Bum-keun
| | 1.94 | | 19 | | | GK | |
| | 19 | |
| |
Seung-Woo Kim
| | | | 19 | | | DF | |
| 3 | |
| |
Woo, Chan-yang
| | 1.83 | | 20 | | | DF |  Pohang |
| 20 | |
| |
Lee, Jung-Moon
| | | | 19 | | | DF | |
| 5 | |
| |
Lee, Sang-min (1998)
(c) | | 1.88 | | 19 | | | DF Centre-back | |
| 4 | |
| |
Jeong, Tae-wook
| | 1.94 | | 20 | | | DF Centre-back | |
| 2 | |
| |
Jong-Gyu Yoon
| | 1.73 | | 19 | | | DF Right-back | FC Seoul |
| 13 | |
| |
Lee, You-hyeon
| | | | 20 | | | DF Right-back | Jeonnam |
| | 18 | |
| |
Lim Min-hyeok
| | 1.63 | | 20 | | | MF Attacking midfielder | FC Seoul |
| 16 | |
| |
Sang-Heon Lee
| | 1.78 | | 19 | | | MF Attacking midfielder | Ulsan |
| 7 | |
| |
Lee, Jin-Hyun
| | 1.73 | | 19 | | | MF Attacking midfielder/Right-wing | |
| 14 | |
 | |
Paik, Seung-ho
| | 1.82 | | 20 | | | MF Box-to-Box midfielder |  Peralada |
| 6 | |
| |
Seung-Mo Lee
| | 1.85 | | 19 | | | MF Box-to-Box midfielder/Striker | Pohang |
| 8 | |
| |
Han, Chan-Hee
| | 1.81 | | 20 | | | MF Box-to-Box midfielder | Jeonnam |
| 17 | |
| |
Kang, Ji-hoon
| | 1.78 | | 20 | | | MF Right-midfield/Right-back | |
| | 11 | |
| |
Ha, Seung-Un
| | | | 19 | | | FW | |
| 10 | |
| |
Seung-Woo Lee
| | 1.73 | | 19 | | | FW Left-wing/Right-wing | Barcelona |
| 9 | |
| |
Cho, Young-wook
| | 1.78 | | 18 | | | FW Striker/Right-wing | |
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