Giovanni Odazzi (1663 – June 6, 1731) was an Italian painter and etcher of the Baroque period, active mainly in Rome.
He was a pupil of Ciro Ferri, then worked under the guidance of Giovanni Battista Gaulli. He also worked with Cornelis Bloemaert. Among his many works in Rome, he painted a Prophet Hosea for San Giovanni in Laterano and a Fall of Lucifer and rebel angels for the basilica of the Santi Apostoli, Rome. He frescoed the cupola of the cathedral of San Bruno in Velletri. He painted an Adoration of the Magi and Flight to Egypt for the church of Santa Maria in Aracoeli in Rome. He also painted altarpieces for Santa Maria degli Angeli, a Dream of Joseph for Santa Maria della Scala, San Clemente, a San Ciriaco for Santa Maria in Via Lata and San Giovanni in Laterano. He was knighted into the Academy of St Luke by Pope Clement XI.