Antioch CA ZIP Code


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Antioch city is located in California State, Contra Costa County and has a unique zip code assigned by the US Postal Service Office.


You can search for the Antioch CA zip code by its streets and block numbers if we have some of the Antioch streets loaded in our website

Antioch Area Code is 925 and Time Zone is Pacific (GMT -08:00).



Antioch Zip Code - California

The US ZIP Code basic format consists of five decimal numerical digits assigned to the Antioch City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Antioch ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Antioch, California.

The Antioch Zip Code is 94509, 94531.



If you want to send a mail to Antioch City, you should use the 94509, 94531 Zip Code.

In 1983, the U.S. Postal Service introduced an expanded Antioch ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 94509, 94531 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Antioch city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in California.


Antioch, California - MAP



What is the Antioch Zip Code?

The Antioch Zip Code in California is 94509, 94531.


ZIP Plus 4 Antioch - US Streets Zip Codes

By pressing keys ctrol + F you can search Antioch zip codes by its streets, highways, and know the ZIP+4 US ZIP Code


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Search Antioch Zip Code

What is the zip code for Antioch CA?

94509, 94531

Antioch, California - US Zip Code



Antioch ZIP Code Lookup

94509, 94531 Zip Code File:
Zip Code: 94509, 94531,
City: Antioch
Antioch Area Code: 925
Antioch, CA - Time Zone: Pacific (GMT -08:00)
County: Contra Costa
City Alias: Antioch, Antioch
State: California
State Abb: CA



California Zip+4 - Nearby Antioch Cities

Cities near Antioch in California
(straight line)


View more California zip codes