Judan

Judan can refer to:


 * Judan, Iran, a village in Markazi Province, Iran
 * Judan, Isfahan, a village in Isfahan Province, Iran
 * The 10th degree black belt in Dan rank in Japan
 * Judan (Go), a Go competition in Japan
 * A shogi competition in Japan between 1962 and 1987; see Ryu-oh
 * Kaohsiung Arena metro station (巨蛋車站; Jùdàn Chēzhàn), Kaohsiung Metro, Taiwan