An Byeong-hun (born 17 September 1991), also known as Byeong-Hun An or Ben An, is a professional golfer from Seoul, South Korea. In August 2009, he became the youngest-ever winner of the U.S. Amateur.
An turned professional in 2011 and earned a spot on the Challenge Tour via three stages of qualifying school.
In May 2015, he won the BMW PGA Championship at Wentworth. He was only the second player to win both the U.S. Amateur and the British PGA Championship, after Arnold Palmer.
In December 2019, An played on the International team at the 2019 Presidents Cup at Royal Melbourne Golf Club in Australia.