Ivan III (disambiguation)

Ivan III may refer to:


 * Ivan III Nelipac (died 1434), viceroy of Croatia
 * Ivan III of Russia (1440–1505), grand prince of Moscow and later sovereign of all Russia
 * Ivan III of Ryazan, grand prince of Ryazan (1427–1456)
 * Ivan III Draskovic (1595 or 1603 – 1648), Croato-Hungarian warrior and statesman, Palatine of Hungary
 * Ivan Asen III of Bulgaria, tsar of Bulgaria 1279–1280