Los Alamos County leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About 88% of adults in Los Alamos County typically vote, above the U.S. average of about 62%. Among adults in Los Alamos County, ~56% vote Democratic, ~32% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How Los Alamos County compares
Among counties within 50 miles, Los Alamos County leans more Democratic than 2 of 3 neighbors.
Los Alamos County runs about 21 points more Democratic than New Mexico as a whole.
Politics vary noticeably by city within Los Alamos County. The west side is the most Democratic-leaning (D+41) and the southwest side is the least Democratic-leaning (D+9), a spread of about 32 points.
Why Los Alamos County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Los Alamos County, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 69% of adults in Los Alamos County hold a bachelor's degree, about 41 points above the U.S. average of 28%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Los Alamos County, NM sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Los Alamos County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Los Alamos County 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 77%, about 17 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Los Alamos County have completed high school, in the top fraction of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Santa Fe County, NM D+45
- Rio Arriba County, NM D+20
- Sandoval County, NM D+4
- Taos County, NM D+42
- Bernalillo County, NM D+21
- San Miguel County, NM D+24
- Mora County, NM D+18
- Torrance County, NM R+36
- Valencia County, NM R+13
- Conejos County, CO R+25
Counties with Similar Populations
- Freestone County, TX R+56
- Benton County, MO R+60
- Chaffee County, CO D+6
- Cherokee County, KS R+56
- Jackson County, IA R+35
- Spencer County, KY R+56
- Langlade County, WI R+35
- Adair County, OK R+54
- Fayette County, IA R+30
- Polk County, NC R+31
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.