John III

• Ioannes III (disambiguation)
• Ivan III of Russia
• John 3
• John III (bishop of Jerusalem)
• John III Comyn, Lord of Badenoch
• John III Crispo
• John III Doukas Vatatzes
• John III Megas Komnenos
• John III Rizocopo
• John III Sobieski
• John III of Amalfi
• John III of Gaeta
• John III of Montferrat
• John III of Naples
• John III of Navarre
• John III of Portugal
• John III of Sweden
• John III of the Sedre
• John III, Burgrave of Nuremberg
• John III, Count of Auvergne
• John III, Duke of Brabant
• John III, Duke of Brittany
• John III, Duke of Cleves
• John Scholasticus
• Pope John III
• Prince Jean, Duke of Guise
• Third Epistle of John
• Yohannes III of Ethiopia