Galleria Umberto I is a public shopping gallery in Naples, southern Italy. It is located directly across from the San Carlo opera house.
The building is part of the UNESCO listing of the Historic Centre of Naples as a World Heritage Site.
It was built between 1887–1891, and was the cornerstone in the decades-long rebuilding of Naples (called the risanamento) that lasted until World War I.
It was designed employing modern architectural elements inspired by the Galleria Vittorio Emanuele II in Milan. The Galleria was named for Umberto I, King of Italy at the time of construction.
The Galleria is a high and spacious cross-shaped structure, surmounted by a glass dome braced by 16 metal ribs. Of the four iron and glass-vaulted wings, one fronts on via Toledo (via Roma), still the main downtown thoroughfare, and another opens onto the San Carlo Theatre.