Ko Gi-Hyun (Korean: 고기현; Hanja: 高基鉉; born May 11, 1986) is a South Korean short track speed skater.

Ko remains the second youngest individual gold medalist after Tara Lipinski in the history of the Olympic Winter Games, winning gold in women's 1500 m event at the 2002 Winter Olympics in Salt Lake City, United States, at 15 years and 277 days old.

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