Zip Code 94596 — Walnut Creek, CA
94596 is a ZIP Code associated with Walnut Creek, CA, located within Contra Costa. 94596 ranks #23 out of 43 ZIP codes in Contra Costa County by population (and #752 out of 1,802 in CA). The area supports an estimated population of 23,417 residents across Data Pending housing units, with a population density of 1,491.4 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (37.889020, -122.036760)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 94596 |
| Primary City | Walnut Creek |
| State / Province | CA |
| County | Contra Costa |
| Total Population | 23,417 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 1,491.4 people/sq mi |
| Timezone | America/Los_Angeles |
How 94596 Compares
| Metric | ZIP 94596 | Contra Costa County | CA State Average |
|---|
| Population | 23,417 | 1,171,369 (Total) | 39,286,245 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 1,491.4 /sq mi | -- | -- |
| County Pop Rank | #23 of 43 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →