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.

In 1437, he married Mary (1418–1472), daughter of Engelbert I of Nassau.

They had the following children: After his death, the inheritance was divided: Adolf III received Wiesbaden; Philip received Idstein.

When Philip died childless in 1509, Idstein reverted to Adolf.