Walnut Creek, CA ZIP Codes
Walnut Creek, California has 4 ZIP codes: 4 for street addresses (, , and ).
Your street decides which one you use.
Which Walnut Creek ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Walnut Creek ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: Walnut Creek city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Walnut Creek ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 94595 | street delivery Rossmoor |
| 94596 | street delivery Walnut Creek Sorting and Delivery Center |
| 94597 | street delivery Walnut Creek Sorting and Delivery Center |
| 94598 | street delivery Ygnacio Valley |
Why your mail may say Walnut Creek when you live outside it
Walnut Creek ZIP codes also cover Saranap, San Miguel and North Gate, so a letter addressed to Walnut Creek can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Contra Costa County property records show which city you are in.
Walnut Creek ZIP code questions
What is the main ZIP code for Walnut Creek?
94596, the ZIP code of the main Walnut Creek Sorting and Delivery Center post office at 2070 N Broadway.
What county is Walnut Creek in?
Contra Costa County.
ZIP codes for towns near Walnut Creek
More towns near Walnut Creek: Castro Valley, Oakland, Antioch, Berkeley, Dublin, San Leandro, Alameda, San Pablo, Brentwood.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections