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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of San Quentin, CA

San Quentin, CA Covers 2 ZIP Codes

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 94964P.O. BoxMarin5,094415 / 628
ZIP Code 94974StandardMarin0415 / 628

Timezone(s):Pacific (GMT -08:00)
Counties:MARIN, CA
Population:5,094 (More Details)
Male Population:4,970
Female Population:124
Median Age:41
ZIP Codes:2
Area Codes:2
Total Area:828 square miles (county)
Land Area:520 square miles (county)
Water Area:308 square miles (county)

San Quentin, CA Demographic Information *

There is no Census data for the city of SAN QUENTIN, CA. We have pulled information for the ZIP Code 94964 instead.
Total population5,094
Male population4,970
Female population124
Median age (years)40.8
White Population2,060
Black Population2,003
Indian Population124
Asian Population72
Hawaiian Population13
Hispanic Population994
Median age (Male)40.8
Median age (Female)44
Total households99
Family households (families)59
Average household size2.42
Average family size3.08
Total housing units115
* 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],