Adolf III may refer to:
Adolf III of Berg, count of Berg from 1093 until 1132 Adolf III of Holstein (1160–1225) Adolf III of the Marck (1334–1394) Adolf III of Nassau (c. 1423–1475) Adolf III of Nassau-Wiesbaden-Idstein (1443–1511) Adolf III of Schauenburg (1511–1556)