78597 leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 59% of adults in 78597 typically vote, near the U.S. average of about 62%. Among adults in 78597, ~23% vote Democratic, ~36% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 78597 compares
78597 runs about 8 points more Republican than Texas as a whole.
Why 78597 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 78597, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 2% of residents in 78597 live in densely developed areas, about 33 points below the Texas average of 35%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 78597, TX sits in the top 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 78597 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 78597 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 70%, about 9 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Texas Secretary of State, Elections Division, 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.