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 2026 population of 101,680. San Mateo is currently declining at a rate of -0.65% annually and its population has decreased by -3.76% since the most recent census, which recorded a population of 105,658 in 2020.

The median household income in San Mateo is $153,504 with a poverty rate of 8.22%. The median age in San Mateo is 38.3 years: 36.4 years for males, and 40.2 years for females. For every 100 females there are 98.2 males.

101.7K
Total Population
8,380
Density (mi²)
-663 -0.65%
Growth

San Mateo Population

San Mateo Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026101,680-663-0.65%
2025102,343-663-0.64%
2024103,0069080.89%
2023102,0981420.14%
2022101,956-944-0.92%
2021102,900-2,763-2.61%
2020105,6582,1952.12%
2019103,463-767-0.74%
2018104,230540.05%
2017104,1762820.27%
2016103,8946220.6%
2015103,2721,4491.42%
2014101,8231,1661.16%
2013100,6571,1121.12%
201299,5451,3011.32%
201198,2449881.02%
201097,256490.05%
200092,4826,9968.18%
199085,4867,84610.11%
198077,640-1,351-1.71%
197078,9919,12113.05%
196069,87028,08867.23%
195041,78222,379115.34%
194019,4035,95944.32%
193013,4447,465124.85%
19205,9791,59536.38%
19104,3842,552139.3%
19001,83290096.57%
188093200%

Median Age

Overall: 38.3 years
Female: 40.2 years
Male: 36.4 years

San Mateo Adults

There are 82,894 adults, (17,563 of whom are seniors) in San Mateo.

Sex Ratio

Female: 52,019 (50.5%)
Male: 51,086 (49.5%)

Demographics

The racial composition of San Mateo includes 37.93% White, 28.35% Asian, 13.36% other race, and smaller percentages for Native American, Black or African American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White39,11237.93%
Asian29,22628.35%
Two or more races16,36515.87%
Other race13,77813.36%
Native American1,7031.65%
Black or African American1,4891.44%
Native Hawaiian or Pacific Islander1,4321.39%
Race
Population ↓
Percentage (of total)
Other race12,55512.18%
Two or more races10,1889.88%
White3,6203.51%
Native American1,5511.5%
Asian4060.39%
Native Hawaiian or Pacific Islander630.06%
Black or African American350.03%
Race
Population ↓
Percentage (of total)
White35,49234.42%
Asian28,82027.95%
Two or more races6,1775.99%
Black or African American1,4541.41%
Native Hawaiian or Pacific Islander1,3691.33%
Other race1,2231.19%
Native American1520.15%

San Mateo Marital Status

Economics and Income Statistics

San Mateo 's average per capita income is $97,506. Household income levels show a median of $153,504. The poverty rate stands at 8.22%.

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
Married Families$226,048-
Families$190,410$251,514
Households$153,504$212,670
Non Families$102,805$140,256

$97,506

Average Income

$153,504

Median Household Income

8.22%

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)