San Carlos

County:: San Mateo County
County Seat:: No
Area (mi²):: 5.412
State:: California

San Carlos is a city located in San Mateo County, California. San Carlos has a 2025 population of 27,678. San Carlos is currently declining at a rate of -2.09% annually and its population has decreased by -9.66% since the most recent census, which recorded a population of 30,638 in 2020.

The average household income in San Carlos is $335,300 with a poverty rate of 3.22%. The median age in San Carlos is 41.6 years: 39.5 years for males, and 43.2 years for females.

Demographics

The racial composition of San Carlos includes 59.42% White, 21.92% Asian, 3.58% other race, and smaller percentages for Native Hawaiian or Pacific Islander, Black or African American, Native American and multiracial populations.

Population by Race

White

Asian

Two or more races

Other race

Native Hawaiian or Pacific Islander

Black or African American

Native American

Race	Population	Percentage (of total)
White	17,706	59.42%
Asian	6,531	21.92%
Two or more races	3,936	13.21%
Other race	1,067	3.58%
Native Hawaiian or Pacific Islander	249	0.84%
Black or African American	242	0.81%
Native American	66	0.22%

San Carlos Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

San Carlos' average per capita income is $133,920. Household income levels show a median of $233,333. The poverty rate stands at 3.22%.

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
Families	$250,001	$390,557
Married Families	$250,001	-
Households	$233,333	$335,300
Non Families	$111,123	$167,809

$133,920

Average Income

$233,333

Median Household Income

3.22%

Poverty Rate