Jang Sung-woo (, born 19 March 2002) is a South Korean short-track speed skater.

Career Jang represented South Korea at the 2020 Winter Youth Olympics and won a gold medal in the 1000 metres and a silver medal in the 500 metres events. He also won a silver medal in the mixed team relay.

He represented South Korea at the 2025 Asian Winter Games and won gold medals in the 1000 metres with a time of 1:28.304, and the 2000 metre mixed relay. He also won bronze medals in the 500 metres and 1500 metres.

Jang fell during the selection trials for the 2026 Winter Olympics and suffered an ankle injury. As a result he failed to qualify for the Olympics.

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