Martinez CA ZIP Code
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Martinez 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 Martinez CA zip code by its streets and block numbers if we have some of the Martinez streets loaded in our website
Martinez Area Code is 925 and Time Zone is Pacific (GMT -08:00).
Martinez Zip Code - California
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Martinez City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Martinez ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Martinez, California.
The Martinez Zip Code is 94553.
If you want to send a mail to Martinez City, you should use the 94553 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Martinez 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 94553 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Martinez 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.