Ioannes II

Ioannes II (Greek: Ἰωάννης Β΄, "John II") may refer to:

• Patriarch John II of Constantinople (ruled 518–520)
• John II Komnenos (1087–1143), Byzantine emperor
• John II of Trebizond (c. 1262–1297)
• John II Doukas of Thessaly (ruled 1303–1318)
• John II Orsini (ruled 1323–1335)