San Antonio leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 84% of adults in San Antonio typically vote, above the U.S. average of about 62%. Among adults in San Antonio, ~31% vote Democratic, ~53% Republican, and ~16% 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 23 of 56 neighbors.
San Antonio runs about 14 points more Republican than Florida as a whole.
Politics vary noticeably by neighborhood within San Antonio. The west side is the most Republican-leaning (R+43) and the east side is the least Republican-leaning (R+11), 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 Republican even though it is densely developed (about 43%, modestly below the Florida average of 57%). Here an older population outweighs the Democratic lean that density usually predicts.
Park access and Republican lean
Places with low park coverage tend to lean Republican; San Antonio, FL sits in the bottom quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in San Antonio looks the way it does
Areas with strong routine healthcare access turn out at higher rates. San Antonio 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 68%, about 8 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 96% of households in San Antonio own their home, about 21 points above the U.S. average of 75%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- St. Leo, FL R+15
- Darby, FL R+44
- St. Joseph, FL R+39
- Dade City, FL R+30
- Zephyrhills, FL R+26
- Pasadena Hills, FL R+23
- Wesley Chapel, FL R+6
- Zephyrhills West, FL R+29
- Zephyrhills South, FL R+31
- Spring Lake, FL R+56
Cities with Similar Populations
- Rising Sun, IN R+56
- Smithfield, PA R+55
- Russellville, TN R+68
- Breckenridge Hills, MO D+33
- Bridgeport, NY R+17
- West Liberty, IA R+7
- Georgia, VT R+21
- Moody, TX R+65
- Richwood, LA D+67
- West Lebanon, NH D+49
Sources and methodology
Precinct-level voting records used to fit the model come from Florida Division 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.