Zhier Fan (born April 12, 2004) is an American competitive swimmer. He is a world junior record holder in the 4×50-meter mixed medley relay. At the 2022 Junior Pan Pacific Swimming Championships, he won gold medals in the 100-meter breaststroke, 4×100-meter medley relay, and 4×100-meter mixed medley relay, as well as winning the b-final of the 200-meter breaststroke.