South San Francisco Flag

South San Francisco

County Seat:
No
Area (mi²):
9.204
State:
California

South San Francisco is a city located in San Mateo County, California. South San Francisco has a 2026 population of 64,660. South San Francisco is currently growing at a rate of 1.45% annually but its population has decreased by -1.89% since the most recent census, which recorded a population of 65,903 in 2020.

64.7K
Total Population
7,025
Density (mi²)
922 1.45%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)