Giovanni Andrea Archetti (September 11, 1731 – November 5, 1805) was an Italian Roman Catholic Cardinal
Born in Brescia, Lombardy, Archetti studied canon and civil law in La Sapienza University of Rome. He was ordained priest on September 10, 1775, elected titular archbishop of Chalcedon (Calcedonia) on the next day, and named Apostolic nuncio in Poland on September 18, 1775. He was instrumental in the failure of the Zamoyski Code.
Archetti was made cardinal priest in the consistory of September 20, 1784 by Pope Pius VI, with the title of Sant'Eusebio and appointed apostolic legate in Bologna the following year. He was transferred to the see of Ascoli Piceno with personal title of archbishop on June 1, 1795. He took part in the Papal conclave of 1799/1800 in Venice. On April 2, 1800 he was named cardinal bishop of the suburbicarian diocese of Sabina, retaining the see of Ascoli Piceno.
He died in 1805 in Ascoli.