Christian II generally refers to Christian II of Denmark. It may also refer to:
Christian II (Archbishop of Mainz) (1179–1253) Christian II, Count of Oldenburg (died 1233) Christian II, Elector of Saxony (1583–1611) Christian II, Prince of Anhalt-Bernburg (1599–1656) Christian II, Count Palatine of Zweibrücken-Birkenfeld (1637–1717) Christian II, Duke of Saxe-Merseburg (1599–1656) Christian August II, Duke of Schleswig-Holstein-Sonderburg-Augustenburg (1798–1869) Christian Ernest II, Duke of Saxe-Coburg-Saalfeld (1683–1745) Christian Günther II, Count of Schwarzburg-Sondershausen-Arnstadt (1616–1666) Christian Ludwig II, Duke of Mecklenburg-Schwerin (1683–1756) Christian Ulrich II, Duke of Württemberg-Wilhelminenort (1691–1734)