United Nations Plaza is a 2.6-acre (1.1 ha) plaza located on the former alignments of Fulton and Leavenworth Streets—in the block bounded by Market, Hyde, McAllister, and 7th Street—in the Civic Center of San Francisco, California. It is located 1⁄4 mi (0.40 km) east of City Hall and is connected to it by the Fulton Mall and Civic Center Plaza. Public transit access is provided by the BART and Muni Metro stops at the Civic Center/UN Plaza station, which has a station entrance within the plaza itself.

The Civic Center in San Francisco, California, is an area located a few blocks north of the intersection of Market Street and Van Ness Avenue that contains many of the city's largest government and cultural institutions. It has two large plazas and a number of buildings in classical architectural style. The Bill Graham Civic Auditorium, the United Nations Charter was signed in the Veterans Building's Herbst Theatre in 1945, leading to the creation of the United Nations. It is also where the 1951 Treaty of San Francisco was signed. The San Francisco Civic Center was designated a National Historic Landmark in 1987 and listed in the National Register of Historic Places on October 10, 1978.