Jung Myoung-sook (born 4 May 1975) is a South Korean taekwondo practitioner.
She won a gold medal in heavyweight at the 1993 World Taekwondo Championships, and again gold medals at the 1995 and 1997 World Taekwondo Championships. She won a gold medal at the 1998 Asian Taekwondo Championships in Ho Chi Minh City and a gold medal at the 1998 Asian Taekwondo Championships in Bangkok.