Home > CA > Contra Costa County > Diablo > Zip 94528

Zip Code 94528 — Diablo, CA

94528 is a ZIP Code associated with Diablo, CA, located within Contra Costa. The postal region supports an estimated population of 1,049 residents across Data Pending housing units, with a population density of 351.0 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (37.841490, -121.958190)

Data MetricLocal Statistic
Postal / Zip Code94528
Primary CityDiablo
State / ProvinceCA
CountyContra Costa
Total Population1,049
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density351.0 people/sq mi
TimezoneAmerica/Los_Angeles

How 94528 Compares

MetricZIP 94528Contra Costa CountyCA State Average
Population1,0491,171,36939,286,245
Median IncomeData PendingN/AN/A
Population Density351.0 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 94526Danville2.3 mi32,584N/A
Zip 94507Alamo2.8 mi14,586N/A
Zip 94506Danville3.7 mi27,055N/A
Zip 94598Walnut Creek3.8 mi27,206N/A
Zip 94583San Ramon5.1 mi39,583N/A

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 →