Giovanni Alberto Badoer or Gianalberto Badoaro (12 May 1649 – 17 May 1714) was a Venetian Catholic cardinal who served as Patriarch of Venice and Bishop of Brescia.

After the death of his uncle (1677), he moved to Padua where he met the bishop of that town, Saint Gregorio Barbarigo who deeply influenced his Christian life.

The episcopal consecration followed on 14 November in the Venetian Church of San Lorenzo by the hands of Gregorio Barbarigo who came specifically to Venice for that ceremony.

In particular Badoer opposed in Brescia the priest Giuseppe Beccarelli charging him of Quietism and having him condemned by the Ecclesiastic Tribunal to seven years for heresy.

When the Council of Ten reviewed that process, the punishment was increased to life imprisonment because the Beccarrelli was found guilt also of child sexual abuse.