Los Alamos leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 83% of adults in Los Alamos typically vote, above the U.S. average of about 62%. Among adults in Los Alamos, ~56% vote Democratic, ~27% Republican, and ~17% 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 Democratic than 29 of 43 neighbors.
Los Alamos runs about 27 points more Democratic than New Mexico as a whole.
Politics vary noticeably by neighborhood within Los Alamos. The southeast side is the most Democratic-leaning (D+46) and the northeast side is the least Democratic-leaning (D+19), a spread of about 27 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.
Areas with high college attainment vote Democratic. About 69% of adults in Los Alamos hold a bachelor's degree, about 40 points above the U.S. average of 28%. Dense areas vote Democratic, and Los Alamos sits in the top fifth on density (about 34%, above 82% of cities).
Population density and Democratic lean
Places with high population density tend to lean Democratic; Los Alamos, NM sits in the top quarter nationally on this measure.
Why turnout in Los Alamos looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Los Alamos is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 76%, about 16 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Los Alamos have completed high school, above 92% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Totavi, NM D+29
- Lumberton, NM D+14
- La Mesilla, NM D+58
- Santa Clara Pueblo, NM D+44
- Espanola, NM D+18
- El Duende, NM D+18
- El Rancho, NM D+20
- Santa Cruz, NM D+25
- Hernandez, NM D+22
Cities with Similar Populations
- Hartsdale, NY D+24
- Colesville, MD D+55
- Hyde Park, NY Even
- Paris, KY R+30
- Highland, IL R+28
- Fords, NJ D+4
- St. Johns, MI R+21
- Leeds, AL R+34
- St. Peter, MN Even
- Rosaryville, MD D+77
Sources and methodology
Precinct-level voting records used to fit the model come from New Mexico Secretary of State, Bureau of 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.