An Byeong-hun, also known as Byeong-Hun An or Ben An, is a South Korean professional golfer. In August 2009, he became the youngest-ever winner of the U.S. Amateur.

The United States Amateur Championship, commonly known as the U.S. Amateur, is the leading annual golf tournament in the United States for amateur golfers. It is organized by the United States Golf Association and is currently held each August over a 7-day period.