James Hahn (born November 2, 1981) is an American professional golfer who plays on the PGA Tour.
Born in Seoul, South Korea, Hahn was raised in Alameda, California. He played college golf at the University of California in nearby Berkeley and turned professional after graduating in 2003. On June 4, 2012, he picked up his first win on Tour in 2012 at the Rex Hospital Open after defeating Scott Parel in a playoff.