94509   Zip Code Antioch Contra Costa CA United States

City Antioch
County Contra Costa
State California
Latitude 37.99214
Longitude -121.8142
Population 70,090
Density 4019.17 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: $86,196
Median individual: $40,000

Race

Mode: 27.7% White

Gender

 52.4% female 

Rent

  $2062 / month  

Median house value: $576,984.0

Age

Median: 38.1 years old

Education

With at least college degree: 18.3%
With STEM degree: 47.4%

Marital Status

 43.8% married 

Never married: 38.2%

Labor Force Participation

 64.2% working 

Unemployed: 7.6%

Average Family Size

 3.37 people 

Commute Time

 40.5 minutes 

Health Care

 8.1% uninsured 

Poverty

 13.4%

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

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