Giovanni Orsini

Giovanni Orsini or John Orsini may refer to:


 * John I Orsini (died 1317), count palatine of Cephalonia and Zakynthos
 * John II Orsini, despot of Epirus (1323–1335)
 * Giovanni Orsini (died 1359), bishop of Padua
 * Giovanni Battista Orsini, grand master of the Hospitallers (1467–1476)
 * Giambattista Orsini (died 1503), cardinal