San Antonio leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.
About 42% of adults in San Antonio typically vote, below the U.S. average of about 62%. Among adults in San Antonio, ~18% vote Democratic, ~24% Republican, and ~58% don't vote. The map below shows estimated turnout by block group.
How San Antonio compares
Among cities within 25 miles, San Antonio leans more Republican than 3 of 7 neighbors.
San Antonio runs about 21 points more Republican than New Mexico as a whole. New Mexico leans Democratic overall, while San Antonio is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within San Antonio. The southwest side is the most Republican-leaning (R+46) and the north side is the least Republican-leaning (R+14), a spread of about 32 points.
Why San Antonio 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 San Antonio, not a ranked or complete list of what matters most.
San Antonio votes against the grain of New Mexico. New Mexico leans Democratic overall, while San Antonio runs about 21 points more Republican.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; San Antonio, NM sits in the bottom quarter 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 San Antonio looks the way it does
Areas with limited routine healthcare access turn out at lower rates. San Antonio is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 50%, about 8 points below the New Mexico average of 58%. High food insecurity lines up with lower turnout, and about 26% of adults in San Antonio report food insecurity, above 92% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- San Antonito, NM R+17
- Luis Lopez, NM R+8
- Socorro, NM D+4
- Florida, NM R+8
- Lemitar, NM R+19
- Polvadera, NM R+19
- San Acacia, NM R+24
- La Joya, NM R+18
- Bernardo, NM R+19
Cities with Similar Populations
- Reubens, ID R+61
- Silver City, SD R+42
- Hornsby, IL R+51
- West Perrysburg, NY R+35
- Delwood, IL R+62
- Redeye, VA R+47
- Pageton, WV R+53
- Deckertown, NY R+7
- Metz, CA R+3
- Mc Neill, MS R+70
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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.