Antonio Montagnana (fl. 1730–50, born in Venice) was an Italian bass of the 18th-century who is best remembered for his association with the composer George Frideric Handel, in whose operas Montagnana sang. For the Nobility, he sang in operas including those by Porpora (such as Polifemo), Johann Adolf Hasse, Giovanni Bononcini, and even one Handel opera, Ottone. In 1740 he moved to Madrid for 10 years, where he sang in many operas and many cantatas at the royal chapel.