Home > CA > Contra Costa County > Antioch > Zip 94531

Zip Code 94531 — Antioch, CA

94531 is a ZIP Code associated with Antioch, CA, located within Contra Costa. The postal region supports an estimated population of 46,387 residents across Data Pending housing units, with a population density of 1,276.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (37.956650, -121.777770)

Data MetricLocal Statistic
Postal / Zip Code94531
Primary CityAntioch
State / ProvinceCA
CountyContra Costa
Total Population46,387
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density1,276.8 people/sq mi
TimezoneAmerica/Los_Angeles

How 94531 Compares

MetricZIP 94531Contra Costa CountyCA State Average
Population46,3871,171,36939,286,245
Median IncomeData PendingN/AN/A
Population Density1,276.8 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 94509Antioch3.2 mi70,090N/A
Zip 94561Oakley5.3 mi46,368N/A
Zip 94513Brentwood5.5 mi69,755N/A
Zip 94548Knightsen6.9 mi832N/A
Zip 94517Clayton7.2 mi12,316N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →