Los Alamos is a community in Santa Barbara County, California, home to about 1,163 people across 0.9 square miles. Its ZIP code is 93440.
Homes sold for a median of $520 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Los Alamos. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Los Alamos’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Los Angeles International Airport (LAX)116 miles away |
|---|---|
| Closer regional airport | Santa Maria Public Airport Captain G Allan Hancock Field (SMX)18 miles away |
| Nearest city of 250,000+ | Bakersfield, CA78 miles away |
| Nearest city of 1 million+ | Los Angeles, CA114 miles away |
Straight-line distances from the center of Los Alamos; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Los Alamos had 1,839 residents in the 2020 census, up 34% since 2000.
It’s the 1020th largest of 1,563 towns in California by population.
Santa Barbara County grew from 18,934 residents in 1900 to 448,229 in 2020.
Santa Barbara County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 75°F in summer, and winter lows average 42°F. About 15.5 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Lompoc, CA weather station (15 miles away).
160,460 jobs at 12,484 businesses in Santa Barbara County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
2 doctors and other health care providers list an office in Los Alamos.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 2 |
|---|
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Public schools here are run by Orcutt Union Elementary. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Olga L. Reed ElementaryLos Alamos | K–8 | 170 | Public | 4.2 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.