Zip Code Database List
Account Login
Find ZIP+4 of Address

Find the ZIP Code, County, and +4 of any U.S. Address

FREE ZIP Code Finder

Find info on any U.S. ZIP Code

Other FREE Lookups

Lookup ZIP Code of any City, State, County or Area Code

FREE Radius Search

Find all ZIP Codes

FREE Distance Calc

Calculate the distance between two U.S. or Canadian ZIP codes.

ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Castro Valley, CA

Castro Valley, CA Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 94546StandardAlameda42,209510 / 341
ZIP Code 94552StandardAlameda14,454510 / 341

Timezone(s):Pacific (GMT -08:00)
Counties:ALAMEDA, CA
Population:61,388 (More Details)
Male Population:29,827
Female Population:31,561
Median Age:41
ZIP Codes:2
Area Codes:2
Total Area:821 square miles (county)
Land Area:739 square miles (county)
Water Area:82 square miles (county)

Castro Valley, CA Demographic Information *

Total population61,388
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. 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],