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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

ZIP Codes for City of San Quentin, CA

Need a ZIP Code for San Quentin, CA? Please enter an address.

Counties:MARIN, CA
Area Code(s):415, 628
Timezone(s):Pacific (GMT -08:00)
City Population:5,094 (More Details)
CBSA:San Francisco-Oakland-Berkeley, CA
Congressional District(s):02
Land Area:520 square miles (county)
Water Area:308 square miles (county)

2 ZIP Codes

San Quentin, CA ZIP Code Boundaries

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San Quentin, CA Covers 2 ZIP Codes

ZIP CodeTypePopulation% of PopulationAliases
94964P.O. Box5,094100.00%

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 population**5,094
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 for the City of SAN QUENTIN.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  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],