Walnut Creek, California Zip Codes
📍 Walnut Creek is in Contra Costa County, California with 4 zip codes; the most populous is 94598.
Walnut Creek is a USPS city name in Contra Costa County, California with a Census population of approximately 91,136 across its ZIP codes. Contra Costa County as a whole has 53 ZIP codes in this directory. Below you'll find every zip code serving Walnut Creek with population, income and home value, a map, and the city's affordability profile.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All Walnut Creek Zip Codes
| ZIP Code | City | Details |
|---|---|---|
| 94595 | Walnut Creek | View → |
| 94596 | Walnut Creek | View → |
| 94597 | Walnut Creek | View → |
| 94598 | Walnut Creek | View → |
Walnut Creek at a Glance
Walnut Creek has 4 ZIP codes in this directory: 4 standard delivery ZIPs. The 4 ZIPs with published Census housing data cover 91,136 residents, the largest being 94598 with 26,346 people.
The median ZIP in Walnut Creek has a household income of $135,691 and a home value of $1,076,350, a price-to-income ratio of 7.4, above the 6.7 California ZIP median. Affordability ranges from 94598 at a ratio of 6.6 to 94596, where the median home is $1,241,200. The highest median income is in 94598 at $185,995. Median rent across these ZIPs is $2,480 a month.
61% of households in the typical Walnut Creek ZIP own their home (statewide ZIP median 64%). 69% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 5.4%, far below the 10.8% statewide ZIP median. Overall density is about 2,532 residents per square mile across 36 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.
Walnut Creek Zip Code Map
Interactive map of Walnut Creek, California zip codes. Click any marker for details.