Home > CA > Contra Costa County > Walnut Creek > Zip 94598

Zip Code 94598 — Walnut Creek, CA

ZIP Code 94598 is associated with Walnut Creek, CA, in Contra Costa County. The listed population estimate is 27,206; estimated density is 509.6 people per square mile. Among records with population estimates, it ranks #19 of 43 in Contra Costa County and #671 of 1,762 in CA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (37.892380, -121.982830)

Data MetricLocal Statistic
Postal / Zip Code94598
Primary CityWalnut Creek
State / ProvinceCA
CountyContra Costa
Total Population27,206
Population Density509.6 people/sq mi
TimezoneAmerica/Los_Angeles

How 94598 Compares

MetricZIP 94598Contra Costa County recordsCA records
Population estimate27,2061,171,369 (sum)39,286,245 (sum)
Population Density509.6 /sq mi----
County population rank#19 of 43----
State population rank#671 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 94507Alamo2.9 mi14,586
ZIP 94596Walnut Creek2.9 mi23,417
ZIP 94528Diablo3.8 mi1,049
ZIP 94521Concord4.2 mi41,909
ZIP 94518Concord4.6 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 →