Youn Hyun-jung (born 14 March 1979) is a South Korean taekwondo practitioner.

She won a gold medal in heavyweight at the 2003 World Taekwondo Championships in Garmisch-Partenkirchen, by defeating Chen Zhong in the semifinal, and Nataša Vezmar in the final.

She won a silver medal at the 2002 Asian Games, after being defeated by Wang I-hsien in the final.

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