Ioannes II

Ioannes II (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)