78058 is a Republican stronghold. About 14% of voters here vote Democratic and 86% Republican.
About 74% of adults in 78058 typically vote, above the U.S. average of about 62%. Among adults in 78058, ~10% vote Democratic, ~63% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How 78058 compares
Among zip codes within 15 miles, 78058 leans more Republican than 2 of 3 neighbors.
78058 runs about 57 points more Republican than Texas as a whole.
Why 78058 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 78058. The lean here lands roughly where demographic data alone would predict.
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 78058, TX does.
Why turnout in 78058 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 78058 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 66%, about 6 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 96% of households in 78058 own their home, compared to around 78% in nearby zip codes. High high-school completion lines up with higher turnout, and more than 99% of adults in 78058 have completed high school, above 98% 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.