San Carlos Flag

San Carlos

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.

27.7K
Total Population
5,114
Density (mi²)
-592 -2.09%
Growth

San Carlos Population

San Carlos Population

Data after 2023 is projected based on recent change

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

Race
Population
Percentage (of total)
White17,70659.42%
Asian6,53121.92%
Two or more races3,93613.21%
Other race1,0673.58%
Native Hawaiian or Pacific Islander2490.84%
Black or African American2420.81%
Native American660.22%

San Carlos Marital Status

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

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

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)