94027   Zip Code Atherton San Mateo CA United States

City Atherton
County San Mateo
State California
Latitude 37.45399
Longitude -122.20313
Population 7,002
Density 1393.26 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: $250,001
Median individual: $107,683

Race

Mode: 68.2% White

Gender

 50.7% male 

Rent

  $3501 / month  

Median house value: $2,000,001.0

Age

Median: 49.1 years old

Education

With at least college degree: 83.1%
With STEM degree: 57.2%

Marital Status

 57.8% married 

Never married: 32.6%

Labor Force Participation

 48.2% working 

Unemployed: 3.2%

Average Family Size

 3.18 people 

Commute Time

 23.1 minutes 

Health Care

 1.7% uninsured 

Poverty

 5.3%

All data comes from the SimpleMaps US Zips Comprehensive Database, February 2026.

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