John II, Count of Nassau-Wiesbaden-Idstein

John II of Nassau-Wiesbaden-Idstein (born: 1419; died: 9 May 1480) was a son of Adolph II, Count of Nassau-Wiesbaden-Idstein and his wife Margarete of Baden, a daughter of Margrave Bernard I, Margrave of Baden-Baden en Anna of Oettingen. After his father's death in 1426, he ruled Nassau-Wiesbaden and Nassau-Idstein.

Marriage and issue
In 1437, he married Mary (1418–1472), daughter of Engelbert I of Nassau. They had the following children:
 * Maria (1438–1480), married in 1452 to Louis II of Isenburg
 * John (1439–1480)
 * Margarete (d. 1486)
 * Anna (d. 1480), married in 1466 Otto II of Solms-Braunfels
 * Adolf III (1443–1511), his successor in Nassau-Wiesbaden
 * Bertha (b. 1446)
 * Engelbert (1448–1508)
 * Philip (1450–1509), his successor in Nassau-Idstein
 * Anna

After his death, the inheritance was divided: Adolf III received Wiesbaden; Philip received Idstein. When Philip died childless in 1509, Idstein reverted to Adolf.