About This Place
South San Francisco is a city in San Mateo County, California, United States, located on the San Francisco Peninsula in the San Francisco Bay Area. The population was 63,632 at the 2010 census.
South San Francisco lies north of San Bruno and San Francisco International Airport in a small valley south of Daly City, Colma, Brisbane, and San Bruno Mountain, east of Pacifica and the hills of the Coast Range, and west of the waters of San Francisco Bay. Most of the valley faces San Francisco Bay, affording bay views from higher levels.
South San Francisco has mild winters and dry cool summers. The hills to the west shield the city from much of the fog that prevails in neighboring areas.