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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Atherton, CA

Atherton, CA Covers 1 ZIP Code

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 94027StandardSan Mateo7,089650

Timezone(s):Pacific (GMT -08:00)
Counties:SAN MATEO, CA
Population:6,914 (More Details)
Male Population:3,397
Female Population:3,517
Median Age:48
ZIP Codes:1
Area Codes:1
Total Area:741 square miles (county)
Land Area:448 square miles (county)
Water Area:292 square miles (county)

Atherton, CA Demographic Information *

Total population6,914
Male population3,397
Female population3,517
Median age (years)48.2
White Population5,565
Black Population75
Indian Population7
Asian Population911
Hawaiian Population45
Hispanic Population268
Median age (Male)47.5
Median age (Female)48.8
Total households2,330
Family households (families)1,912
Average household size2.8
Average family size3.03
Total housing units2,530
* 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],