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City Profile

Antioch, California

Population: 115,291 · 2 ZIP codes

Demographics

Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.

People
Total population
115,291
People
Median age
38.4
Housing
Total households
37,381
Income
Median household income
$97,465
Housing
Total housing units
38,629
Employment
Employment rate
59.9%
Education
Bachelor’s degree or higher
23.9%
Healthcare
Insured population
93.6%
City details
Local time 02:21:58(PT)
LocationAntioch, CA
Population (ZIP areas)115,273(sum of local ZIP code populations)
Total ZIP codes2total
ZIP codes (by type)
2 Standard
CountyContra Costa
Area code
TimezonePacific Time (PT)
Coordinates37.97624507496058, -121.79706598840124
Land area31.5 sq miles(81,513,313 m²)

Map of Antioch, California with ZIP codes

Map of Antioch, California and ZIP codes

ZIP Codes in Antioch

Explore the ZIP codes that make up Antioch. Analyze key demographics and population stats for the region using the comprehensive table below.

ZIPType
Median incomeHousehold
Population (ZIP)
94509Standard$86,19669,931
94531Standard$120,92745,342

Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.

ZIP type legend

  • Standard: residential and business delivery areas
  • PO BOX: primarily post office boxes; population may be unavailable
  • Unique: high-volume organizations (universities, agencies, etc.)

Nearby cities

Other cities near Antioch, CA.

Data Sources & Citations

The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:

  • United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
  • United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS