Walnut CA ZIP Code

Walnut city is located in California State, Los Angeles County and has a unique zip code assigned by the US Postal Service Office.


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

Walnut Area Code is 909 and Time Zone is Pacific (GMT -08:00).



Walnut Zip Code - California

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

The Walnut Zip Code is 91788, 91789.



If you want to send a mail to Walnut City, you should use the 91788, 91789 Zip Code.

In 1983, the U.S. Postal Service introduced an expanded Walnut 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 91788, 91789 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Walnut 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.


Walnut, California - MAP




What is the Walnut Zip Code?

The Walnut Zip Code in California is 91788, 91789.


ZIP Plus 4 Walnut - US Streets Zip Codes

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


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Search Walnut Zip Code

What is the zip code for Walnut CA?

91788, 91789

Walnut, California - US Zip Code



Walnut ZIP Code Lookup

91788, 91789 Zip Code File:
Zip Code: 91788, 91789,
City: Walnut
Walnut Area Code: 909
Walnut, CA - Time Zone: Pacific (GMT -08:00)
County: Los Angeles
City Alias: Walnut, Diamond Bar, City Industry, Walnut, City Of Industry
State: California
State Abb: CA



California Zip+4 - Nearby Walnut Cities

Cities near Walnut in California
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View more California zip codes