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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Altadena, CA

Altadena, CA Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 91001StandardLos Angeles36,126626 / 323
ZIP Code 91003P.O. BoxLos Angeles0626 / 323

Timezone(s):Pacific (GMT -08:00)
Population:42,777 (More Details)
Male Population:20,623
Female Population:22,154
Median Age:42
ZIP Codes:2
Area Codes:2
Total Area:4,751 square miles (county)
Land Area:4,058 square miles (county)
Water Area:693 square miles (county)

Altadena, CA Demographic Information *

Total population42,777
Male population20,623
Female population22,154
Median age (years)41.8
White Population22,569
Black Population10,136
Indian Population300
Asian Population2,307
Hawaiian Population71
Hispanic Population11,502
Median age (Male)40.3
Median age (Female)43.4
Total households15,212
Family households (families)10,708
Average household size2.78
Average family size3.26
Total housing units15,947
* 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],