Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/CA/LOS-ALAMOS

Los Alamos ZIP code, California

The ZIP code for Los Alamos, CA is 93440, and its area codes are 805 and 820.

USPS city name
1 ZIP code
Population
1,163
Area codes
805, 820

Los Alamos in numbers

About 1,163 people live in Los Alamos, in 542 households. The median household income is $79,167 a year, 20% below the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $831,300 (13% above the California median), and median gross rent is $2,882 a month. The median age is 58.3; 17.1% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 19 minutes.

Population1,163Los Alamos1,163
Households542Los Alamos542
Median age58.3Los Alamos58.3California37.9US 38.9
Median household income$79,167Los Alamos$79,167California$99,122US $80,734
Median home value$831,300Los Alamos$831,300California$734,700US $332,700
Median gross rent$2,882Los Alamos$2,882California$2,036US $1,413
Bachelor's degree or higher17.1%Los Alamos17.1%California37.1%US 35.7%
Mean commute18.6 minLos Alamos18.6 minCalifornia28.7 minUS 26.4 min
Population density1,287 / sq miLos Alamos1,287 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Los Alamos CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Los Alamos

ZIP codes with the USPS city name Los Alamos
ZIP City Type Population Median income Median home
93440 Los Alamos , CA Standard 1,185 $79,167 $831,300

Map of Los Alamos ZIP codes

93440

The ZIP codes of Los Alamos, CA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Los Alamos

The nearest larger towns are Buellton (5,074 people, 9.8 mi), Mission Hills (3,859 people, 10 mi) and Vandenberg Village (6,776 people, 11 mi).

Towns near Los Alamos
TownPopulationDistance
Buellton 5,074 9.8 mi
Mission Hills 3,859 10.1 mi
Vandenberg Village 6,776 10.8 mi
Orcutt 31,454 12.1 mi
Lompoc 43,646 12.4 mi
Solvang 6,034 12.8 mi
Vandenberg AFB 3,477 13.2 mi
Santa Ynez 4,467 13.3 mi
Santa Maria 110,462 16.3 mi
Guadalupe 8,566 22.9 mi
Nipomo 17,516 23.6 mi

More nearby: every ZIP code in Santa Barbara County · California ZIP codes

Cite this page

zipcodes.pro. “Los Alamos, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/los-alamos

Underlying data is public domain or openly licensed — sources, vintages and licences.