78635 is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 89% of adults in 78635 typically vote, above the U.S. average of about 62%. Among adults in 78635, ~20% vote Democratic, ~69% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.
How 78635 compares
Among zip codes within 15 miles, 78635 leans more Republican than 2 of 3 neighbors.
78635 runs about 42 points more Republican than Texas as a whole.
Why 78635 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 78635, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. 78635 sits in the bottom quarter on density and about 97% of residents are non-Hispanic white, about 41 points above the Texas average of 56%.
High-school completion, developed land, and voter turnout
Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as 78635, TX does.
Why turnout in 78635 looks the way it does
Homeowners vote more often than renters. About 96% of households in 78635 own their home, about 21 points above the Texas average of 75%. Limited routine healthcare access lines up with lower turnout, and 78635 sits in the bottom quarter on routine-care measures. High high-school completion lines up with higher turnout, and more than 99% of adults in 78635 have completed high school, in the top fraction of zip codes. 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.