Sung Hyun-ah (; born 5 May 1982) is a South Korean former footballer who played as a forward. She was a member of the South Korea women's national football team. She played at the 2003 FIFA Women's World Cup..
Sung played for Daekyo Kangaroos from the time of the club's foundation in 2002. She later joined Seoul City Amazones. Sung then played for Incheon Hyundai, scoring a key goal in the team's first win of the 2010 WK League season and going on to score the winner in the first leg of that year's championship final against Suwon FMC.
In 2011, Sung scored twice in the final of the National Women's Football Championship to help Incheon lift the trophy.
In a group stage match against Hong Kong at the 2003 AFC Women's Championship, Sung scored a goal after just 38 seconds of play. This was the fastest goal the South Korean women's national team had ever scored, a record Sung held for over twenty years until it was broken by Choo Hyo-joo in 2024.