Church of Saint John in Udine, Baroque church in Udine, Italy.

The church of San Giacomo Apostolo, built in 1378 for the Confraternita dei pellicciai, faces the raised piazza San Giacomo. Its 1525 facade by Bernardino da Morcote carries a clock above the portal, a balcony and a belfry opened by a bifora; the cappella delle Anime was added in 1744. The interior was heavily reworked in the Baroque period, with a ceiling decorated by Pietro Venier.

The church was built in 1378 for the Confraternita dei pellicciai as a chapel, later enlarged. Its current facade dates to 1525 by Bernardino da Morcote, and the side chapel was added after 1650. The interior was heavily remodelled in the Baroque era, with a ceiling decorated by Pietro Venier.

The church gives its popular name to the surrounding square, officially Piazza Matteotti but commonly Piazza San Giacomo, formerly Mercatonuovo or delle Erbe. The Confraternita dei pellicciai, the furriers' guild, founded it in 1378, and the adjoining Oratorio della Madonna del Suffragio, redecorated by Biagio Biagetti in 1912, is reached from the square or through the church.

The church faces Piazza San Giacomo, a raised square reached from the surrounding streets; the well of 1486 stands in the small square to its left. The Oratory of the Madonna del Suffragio, redone in 1912, is entered both from the square and from the church itself.

The two statues of the Archangel Raphael and a Veiled Woman are by Antonio Corradini, a sculptor known for marble veils. Above the entrance of the adjoining Oratory of the Madonna del Suffragio hangs Michelangelo Grigoletti's large canvas "Il valore del suffragio" of 1865.