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 2025 population of 64,349 . South San Francisco is currently declining at a rate of -0.48% annually and its population has decreased by -2.36% since the most recent census, which recorded a population of 65,903 in 2020.

The average household income in South San Francisco is $175,238 with a poverty rate of 7.09%. The median age in South San Francisco is 42.4 years: 41.4 years for males, and 43.5 years for females. For every 100 females there are 102.7 males.

64.3K
Total Population
6,991
Density (mi²)
-311 -0.48%
Growth

South San Francisco Population

South San Francisco Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of South San Francisco includes 43% Asian, 26.58% White, 14.04% other race, and smaller percentages for Black or African American, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Asian (43%)

White (26.58%)

Other race (14.04%)

Two or more races (12.86%)

Black or African American (1.73%)

Native Hawaiian or Pacific Islander (1.12%)

Native American (0.69%)

Race
Population
Percentage (of total)
Asian27,72743%
White17,13826.58%
Other race9,05114.04%
Two or more races8,29112.86%
Black or African American1,1131.73%
Native Hawaiian or Pacific Islander7221.12%
Native American4450.69%

South San Francisco Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

South San Francisco's average per capita income is $67,812. Household income levels show a median of $135,909. The poverty rate stands at 7.09%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$169,085$195,043
Families$145,361$172,490
Households$135,909$175,238
Non Families$98,688$170,164

$67,812

Average Income

$135,909

Median Household Income

7.09%

Poverty Rate

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)