Giovanni Antonio Sangiorgio (died 14 March 1509) was an Italian canon lawyer and Cardinal. He has been called one of the ‘last two great commentators on feudal law’.
Sangiorgio was born in Milan. He was bishop of Alessandria from 1478; he was referred to as the Cardinal of Alessandria. He was bishop of Parma in 1500. He died in Rome.
His De appellationibus was an early printed book (1474,Como, Ambrogio d'Orco and Dionigi Paravicino).