Home > CA > Contra Costa County > Walnut Creek > Zip 94596

Zip Code 94596 — Walnut Creek, CA

ZIP Code 94596 is associated with Walnut Creek, CA, in Contra Costa County. The listed population estimate is 23,417; estimated density is 1,491.4 people per square mile. Among records with population estimates, it ranks #23 of 43 in Contra Costa County and #752 of 1,762 in CA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (37.889020, -122.036760)

Data MetricLocal Statistic
Postal / Zip Code94596
Primary CityWalnut Creek
State / ProvinceCA
CountyContra Costa
Total Population23,417
Population Density1,491.4 people/sq mi
TimezoneAmerica/Los_Angeles

How 94596 Compares

MetricZIP 94596Contra Costa County recordsCA records
Population estimate23,4171,171,369 (sum)39,286,245 (sum)
Population Density1,491.4 /sq mi----
County population rank#23 of 43----
State population rank#752 of 1,762----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in CA

ZIP CodeCityDistancePopulation estimate
ZIP 94595Walnut Creek2.1 mi16,988
ZIP 94597Walnut Creek2.8 mi23,129
ZIP 94507Alamo2.9 mi14,586
ZIP 94598Walnut Creek2.9 mi27,206
ZIP 94518Concord4.3 mi27,345

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 →