Jangyu is a dong in Gimhae, Gyeongsangnam-do, South Korea. On July 1, 2013, Jangyu-myeon was upgraded to a dong. It is the site of the new city of Jangyu. It is located in the historical Nakdong River valley of southern Korea, where part of the Gaya confederacy was once located before being absorbed into Silla, one of the Three Kingdoms of Korea.