ZIP Code 94531

Zip Code: 94531
Type: Standard
Official USPS city name: Antioch
Official USPS State Code: CA
Official State Name: California
ZCTA: TRUE
Population: 43022.0
Density: 1517.6
Primary Official County Code: 6013
Primary Official County Name: Contra Costa
Official County Name: Contra Costa
Official County Code: 6013
Imprecise: FALSE
Military: FALSE
Timezone: America/Los_Angeles (02:03 AM Thursday, June 19 2025-06-19 (GMT -0700))
Geo Point: 37.96574, -121.77582