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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Fairfax, CA

Fairfax, CA Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 94930StandardMarin8,500415
ZIP Code 94978P.O. BoxMarin0415

Timezone(s):Pacific (GMT -08:00)
Counties:MARIN, CA
Population:7,441 (More Details)
Male Population:3,609
Female Population:3,832
Median Age:46
ZIP Codes:2
Area Codes:1
Total Area:828 square miles (county)
Land Area:520 square miles (county)
Water Area:308 square miles (county)

Fairfax, CA Demographic Information *

Total population7,441
Male population3,609
Female population3,832
Median age (years)45.9
White Population6,617
Black Population110
Indian Population36
Asian Population204
Hawaiian Population4
Hispanic Population504
Median age (Male)45.6
Median age (Female)46.1
Total households3,379
Family households (families)1,875
Average household size2.2
Average family size2.77
Total housing units3,585
* 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],