Giuseppe Zais was an Italian painter of landscapes (vedutisti) who painted mostly in Venice. He was born in Forno di Canale.

He was influenced in his vedute by Marco Ricci and later Francesco Zuccarelli, who helped train him. He is best known for frescoes in Villa Pisani in Stra. While he had been a member of the Academy of Painters in Venice from 1774, he died in poverty at Treviso.