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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

ZIP Codes for City of Los Alamos, CA

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Area Code(s):805, 820
Timezone(s):Pacific (GMT -08:00)
City Population:1,890 (More Details)
CBSA:Santa Maria-Santa Barbara, CA
Congressional District(s):24
Land Area:2,735 square miles (county)
Water Area:1,054 square miles (county)

1 ZIP Code

Los Alamos, CA ZIP Code Boundaries

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Los Alamos, CA Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases
93440P.O. Box2,058100.00%

Los Alamos, CA Demographic Information *

Total population**1,890
Male population946
Female population944
Median age (years)38.2
White Population1,667
Black Population5
Indian Population10
Asian Population32
Hawaiian Population0
Hispanic Population773
Median age (Male)36.3
Median age (Female)39.6
Total households628
Family households (families)461
Average household size3.01
Average family size3.52
Total housing units681
* Demographic data is based on 2010 Census for the City of LOS ALAMOS.
** 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],