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.