San Mateo Flag

San Mateo

County Seat:
No
Area (mi²):
12.134
State:
California

San Mateo is a city located in San Mateo County, California. San Mateo has a 2025 population of 103,006 . San Mateo is currently growing at a rate of 0.89% annually but its population has decreased by -2.51% since the most recent census, which recorded a population of 105,658 in 2020.

The median household income in San Mateo is $152,669 with a poverty rate of 7.94%. The median age in San Mateo is 38 years: 36.3 years for males, and 40.1 years for females. For every 100 females there are 98.5 males.

103K
Total Population
8,489
Density (mi²)
908 0.89%
Growth

San Mateo Population

San Mateo Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of San Mateo includes 41.24% White, 27.06% Asian, 13.9% other race, and smaller percentages for Native Hawaiian or Pacific Islander, Black or African American, Native American and multiracial populations.

Population by Race

White (41.24%)

Asian (27.06%)

Other race (13.9%)

Two or more races (13.33%)

Native Hawaiian or Pacific Islander (1.64%)

Black or African American (1.49%)

Native American (1.34%)

Race
Population
Percentage (of total)
White42,70741.24%
Asian28,02527.06%
Other race14,39213.9%
Two or more races13,80113.33%
Native Hawaiian or Pacific Islander1,7011.64%
Black or African American1,5391.49%
Native American1,3901.34%

San Mateo Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

San Mateo's average per capita income is $92,841. Household income levels show a median of $152,669. The poverty rate stands at 7.94%.

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$221,509-
Families$190,044$241,330
Households$152,669$204,984
Non Families$101,675$136,387

$92,841

Average Income

$152,669

Median Household Income

7.94%

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)