San Mateo   County CA United States

County FIPS 06081
Largest City San Mateo
State California
Latitude 37.4228
Longitude -122.3291
Population 742,340
Density 1655.16 people per square mile
Time Zone America/Los Angeles
  • All demographic data comes from the 2024 American Community Survey (5-year study).
  • Learn more about each field.
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Household Income

Median household: $158,855
Median individual: $64,833

Race

Mode: 37.8% White

Gender

 50.2% female 

Rent

  $2922 / month  

Median house value: $1,553,472.0

Age

Median: 40.9 years old

Education

With at least college degree: 53.7%
With STEM degree: 60.0%

Marital Status

 51.5% married 

Never married: 34.3%

Labor Force Participation

 67.3% working 

Unemployed: 4.8%

Average Family Size

 3.29 people 

Commute Time

 26.4 minutes 

Health Care

 3.8% uninsured 

Poverty

 6.7%

All data comes from the SimpleMaps US Counties Database, 2026.

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