Sant'Antonin is a church in the sestiere of Castello in Venice, Italy.

The church was initially founded by the patrician Badoer family in the seventh century.

The chapel on the left, dedicated to St Saba, was frescoed by Alessandro Vittoria on the walls, and in the ceiling by Sebastiano Ricci with Saints Saba and Antonin.

The Tiepolo family commissioned the decoration of another chapel, with works by Palma il Giovane depicting the life of San Saba.

The chapel is said to contain his remains brought here from Acre by Lorenzo Tiepolo during the 13th century War of Saint Sabas.