Park Sung-hyun (born 21 September 1993), also known as Sung Hyun Park, is a South Korean professional golfer playing on the U.S.-based LPGA Tour. She has won two LPGA majors championships, the 2017 U.S. Women's Open and the 2018 Women's PGA Championship. She was the number one ranked golfer in the Women's World Golf Rankings for a single week in 2017 and has returned to the number one spot in 2018 and 2019.