Sante Piatti (1687–1747) was an Italian painter of the Baroque period, active mainly in his native Venice.
He is attributed to be a pupil of Giuseppe Diamantini, and possibly Gregorio Lazzarini.
During 1726 and 1727 he was a member of the Venetian painter's guild (Fraglia).
He painted a series of works for the Scuola Grande dei Carmini in Venice and an altarpiece of St Antony for the church of San Nicolò dei Mendicoli.
This article about an Italian painter born in the 18th century is a stub.