John of Saxony is the name of:

• John the Old Saxon an Anglo-Saxon scholar and abbot of Athelney
• John I, Duke of Saxony (1249–1285, Duke 1260–1282)
• John of Saxony (astronomer) (fl. 1327–1355).
• John, Elector of Saxony (1468–1532).
• John, King of Saxony (1801–1873, King of Saxony, 1854–1873).