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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Diamond Bar, CA

Diamond Bar, CA Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 91765StandardLos Angeles46,457909
ZIP Code 91789StandardLos Angeles43,079909

Timezone(s):Pacific (GMT -08:00)
Population:55,544 (More Details)
Male Population:27,094
Female Population:28,450
Median Age:41
ZIP Codes:2
Area Codes:1
Total Area:4,751 square miles (county)
Land Area:4,058 square miles (county)
Water Area:693 square miles (county)

Diamond Bar, CA Demographic Information *

Total population55,544
Male population27,094
Female population28,450
Median age (years)41
White Population18,434
Black Population2,288
Indian Population178
Asian Population29,144
Hawaiian Population106
Hispanic Population11,138
Median age (Male)39.5
Median age (Female)42.3
Total households17,880
Family households (families)14,843
Average household size3.1
Average family size3.38
Total housing units18,455
* 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],