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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2023

ZIP Codes for City of Castro Valley, CA

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Counties:ALAMEDA, CA
Area Code(s):510, 341
Timezone(s):Pacific (GMT -08:00)
City Population:61,388 (More Details)
CBSA:San Francisco-Oakland-Berkeley, CA
Congressional District(s):14, 15
Land Area:739 square miles (county)
Water Area:82 square miles (county)

2 ZIP Codes

Castro Valley, CA ZIP Code Boundaries

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Castro Valley, CA Covers 2 ZIP Codes

ZIP CodeTypePopulation% of PopulationAliases

Castro Valley, CA Demographic Information *

Total population**61,388
Male population29,827
Female population31,561
Median age (years)41.2
White Population35,602
Black Population4,260
Indian Population329
Asian Population13,140
Hawaiian Population417
Hispanic Population10,689
Median age (Male)40.2
Median age (Female)42.2
Total households22,348
Family households (families)16,112
Average household size2.69
Average family size3.15
Total housing units23,392
* Demographic data is based on 2010 Census for the City of CASTRO VALLEY.
** 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],