South San Francisco

County:: San Mateo County
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 61,270. South San Francisco is currently declining at a rate of -1.49% annually and its population has decreased by -7.03% since the most recent census, which recorded a population of 65,902 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.

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

White

Other race

Two or more races

Black or African American

Native Hawaiian or Pacific Islander

Native American

Race	Population	Percentage (of total)
Asian	27,727	43%
White	17,138	26.58%
Other race	9,051	14.04%
Two or more races	8,291	12.86%
Black or African American	1,113	1.73%
Native Hawaiian or Pacific Islander	722	1.12%
Native American	445	0.69%

South San Francisco Marital Status

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