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.Physical LocationSouth San Francisco is located at . According to the United States Census Bureau, the city has a total area of 30.2sqmi, of which, 9.1sqmi of it is land and 21.0sqmi of it is water.South San Francisco lies north of San Bruno and San Francisco International Airport in the Colma Creek valley south of Daly City, Colma, Brisbane, and San Bruno Mountain; east of Pacifica and the hills of the northern Coast Range lying along the San Andreas Fault; west of the waters of San Francisco Bay. Locals often refer to the town as South City, in much the same way that San Francisco is called "The City." Belying the name, South San Francisco does not touch on San Francisco, with either Brisbane, Colma, or Daly City lying between them.