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94509
Antioch, California
Contra Costa · 🇺🇸 United States
ZIP Code
Population
70,090
Density/mi²
1,551
Complete ZIP Code Details
ZIP Code94509
CityAntioch
StateCalifornia (CA)
CountyContra Costa
TimezoneAmerica/Los_Angeles
Coordinates37.9921400, -121.8142000
Population70,090
ZIP TypeSTANDARD
CountryUnited States

About 94509 - Antioch, California

Located in California, the United States is home to the densely populated community of Antioch, served by ZIP code 94509. It sits within Contra Costa County.

Antioch has a reported population of 70,090. That's noticeably above the average for a California ZIP code, which sits near 22,296 people.

Population density runs around 1,551 people per sq. mile, making it a suburban area.

Nearby communities in California include Fontana, Pittsburg, Los Angeles.

94509 vs. California Average
Population Share vs. Nearby ZIP Codes
Frequently Asked Questions
What is the ZIP code for Antioch?

The ZIP code for Antioch, California is 94509.

What county is 94509 located in?

94509 is located in Contra Costa County, California.

What is the population of 94509?

The population of 94509 (Antioch) is approximately 70,090 people.

Is 94509 bigger or smaller than a typical California ZIP code?

94509 is more populated than the typical California ZIP code, which averages around 22,296 people.

What are the ZIP code codes near 94509?

ZIP code codes near 94509 include 92336, 94565, 90011.