John of Nassau-Hadamar

John (died 1364 or 1365) was ruling count of Nassau-Hadamar from his father Emich I's death in 1334. He enlarged his lands by buying a share of Driedorf and taking the Amt Ellar in pledge in 1337. His later feuds drove him into debt: he backed Emperor Charles IV against Louis the Bavarian, and in 1351 was captured near Löhnberg and had to ransom himself.

He later sold his Frankish estates around Kammerstein to Burgrave Albert of Nuremberg. By Elisabeth of Waldeck he left his successor Henry.