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 98,441. San Mateo is currently declining at a rate of -1.44% annually and its population has decreased by -6.83% since the most recent census, which recorded a population of 105,656 in 2020.

The average household income in San Mateo is $204,984 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.

98.4K
Total Population
8,113
Density (mi²)
-1.4K -1.44%
Growth

San Mateo Population

Demographics

Economics and Income Statistics

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)