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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Diablo, CA

Diablo, CA Covers 1 ZIP Code

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 94528P.O. BoxContra Costa964925

Timezone(s):Pacific (GMT -08:00)
Population:1,158 (More Details)
Male Population:564
Female Population:594
Median Age:49
ZIP Codes:1
Area Codes:1
Total Area:804 square miles (county)
Land Area:723 square miles (county)
Water Area:81 square miles (county)

Diablo, CA Demographic Information *

Total population1,158
Male population564
Female population594
Median age (years)49.3
White Population1,065
Black Population1
Indian Population2
Asian Population55
Hawaiian Population0
Hispanic Population39
Median age (Male)50.1
Median age (Female)48.3
Total households412
Family households (families)343
Average household size2.67
Average family size2.96
Total housing units439
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 5/1/2022],
  2. Internal Data Creation [Last Updated: 5/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],