Alvise Loredan (1393 – 6 March 1466) was a Venetian nobleman of the Loredan family. At a young age he became a galley captain, and served with distinction as a military commander, with a long record of battles against the Ottomans, from the naval expeditions to aid Thessalonica, to the Crusade of Varna, and the opening stages of the Ottoman–Venetian War of 1463–1479, as well as the Wars in Lombardy against the Duchy of Milan. He also served in a number of high government positions, as provincial governor, savio del consiglio, and Procuratore de Supra of Saint Mark's Basilica.
Alvise Loredan was born in 1393 in the parish of St. Canciano in Venice, the only son of Giovanni Loredan, son of the Procurator of St Mark's Alvise Loredan. The name and origin of his mother are unknown. At the age of 21 he married Andriola, daughter of the merchant Cristoforo Negrobon, who, although wealthy, was apparently not a member of the patriciate, the upper stratum of the Venetian aristocracy. This marriage involved Loredan in commercial activities, but without much success; the death of his father in 1420, while he was away as duke (governor) of Crete, forced Loredan to assume the leadership of his household, and by 1423 Alvise had entered the service of the Republic as sopracomito (captain) in one of the war galleys, although in September of that year he was allowed to lay aside that duty due to a grave illness.