Los Alamos leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 68% of adults in Los Alamos typically vote, above the U.S. average of about 62%. Among adults in Los Alamos, ~32% vote Democratic, ~36% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How Los Alamos compares
Among cities within 25 miles, Los Alamos leans more Republican than 11 of 18 neighbors.
Los Alamos runs about 25 points more Republican than California as a whole. California leans Democratic overall, while Los Alamos is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Los Alamos. The northwest side is the most split-leaning (R+30) and the west side is the least split-leaning (R+2), a spread of about 28 points.
Why Los Alamos leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Los Alamos, not a ranked or complete list of what matters most.
Los Alamos votes against the grain of California. California leans Democratic overall, while Los Alamos runs about 25 points more Republican.
Local retail density and voter turnout
Places with dense local retail within a mile tend to turn out at a higher rate; Los Alamos, CA sits in the top tenth nationally on this measure. Nearby retail does not change how people vote; it reflects how urban and built-up a place is.
Why turnout in Los Alamos looks the way it does
Turnout in Los Alamos sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Garey, CA R+30
- Buellton, CA Even
- Sisquoc, CA R+26
- Los Olivos, CA D+14
- Vandenberg Village, CA R+4
- Lompoc, CA D+10
- Solvang, CA D+13
- Orcutt, CA R+8
- Santa Ynez, CA D+6
- Surf, CA R+15
Cities with Similar Populations
- Audubon, MN R+40
- McCamey, TX R+50
- New Eagle, PA R+30
- Sigourney, IA R+39
- Presto, PA R+5
- Loganton, PA R+66
- Ashland, NH Even
- Vernon, VT D+4
- Farley, IA R+39
- Arcola, TX D+26
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from California Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.