Адольф II (или III) Нассау-Висбаден-Идштайн (нем. Adolf II. von Nassau-Wiesbaden-Idstein) (ок. 1423 – 6 сентября 1475) был архиепископом Майнца с 1461 по 1475 год.
In 1459 he was defeated in the election to the Archbishopric of Mainz by Theodoric of Isenburg-Büdingen. In 1461 Pope Pius II declared Adolph the archbishop of Mainz following the confrontational reforms of Theodoric. Since the city of Mainz and its cathedral chapter remained loyal to Theodoric, Adolph declared war. The devastating Mainz Diocesan Feud continued for a year until, on 28 October 1462, Adolph captured the town. Some 400 citizens he had killed, and another 400 fled abroad. Adolph also revoked Mainz's privileges and its status as a Free City.