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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Castaic, CA

Castaic, CA Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 91310P.O. BoxLos Angeles0805 / 820
ZIP Code 91384StandardLos Angeles29,855661 / 805 / 820

Timezone(s):Pacific (GMT -08:00)
Population:19,015 (More Details)
Male Population:9,566
Female Population:9,449
Median Age:36
ZIP Codes:2
Area Codes:3
Total Area:4,751 square miles (county)
Land Area:4,058 square miles (county)
Water Area:693 square miles (county)

Castaic, CA Demographic Information *

Total population19,015
Male population9,566
Female population9,449
Median age (years)35.6
White Population13,607
Black Population630
Indian Population119
Asian Population2,162
Hawaiian Population26
Hispanic Population4,716
Median age (Male)34.9
Median age (Female)36.3
Total households5,751
Family households (families)4,838
Average household size3.29
Average family size3.57
Total housing units5,932
* 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],