The Castro Theatre is a historic movie palace in the Castro District of San Francisco, California. The venue became San Francisco Historic Landmark #100 in September 1976. Located at 429 Castro Street, it was built in 1922 with a California Churrigueresque façade that pays homage—in its great arched central window surmounted by a scrolling pediment framing a niche—to the basilica of Mission Dolores nearby. Its designer, Timothy L. Pflueger, also designed Oakland's Paramount Theater and other movie theaters in California during that period. The theater has more than 1,400 seats.

A movie palace is a large, elaborately decorated movie theater built from the 1910s to the 1940s. The late 1920s saw the peak of the movie palace, with hundreds opening every year between 1925 and 1930. With the advent of television, movie attendance dropped, while the rising popularity of large multiplex chains in the 1980s and 1990s signaled the obsolescence of single-screen theaters. Many movie palaces were razed or converted into multiple-screen venues or performing arts centers, though some have undergone restoration and reopened to the public as historic buildings.