what county is south san francisco
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.