Seong Nak-gun

Seong Nak-gun (born 26 February 1962) is a South Korean sprinter. He competed in the men's 4 × 100 metres relay at the 1988 Summer Olympics.

Seong attended Busan Sports High School (부산체육고등학교) and was active in track and field there. He went on to Dong-a University, and while a student there represented South Korea at the 1980 Juniors Track World Championships and the 1983 Asian Athletics Championships. Along with Jang Jae-keun, Kim Jong-il, and Sim Deok-seop, he was part of the team which won bronze in the men's 4 × 100 metres relay at the 1986 Asian Games.

His brother Seong Nak-gap was also a competitive sprinter in the 1990s.