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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2023

ZIP Codes for City of Diablo, CA

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Area Code(s):925
Timezone(s):Pacific (GMT -08:00)
City Population:1,158 (More Details)
CBSA:San Francisco-Oakland-Berkeley, CA
Congressional District(s):10
Land Area:723 square miles (county)
Water Area:81 square miles (county)

1 ZIP Code

Diablo, CA ZIP Code Boundaries

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Diablo, CA Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases
94528P.O. Box964100.00%

Diablo, CA Demographic Information *

Total population**1,158
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 for the City of DIABLO.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  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],