78959 leans Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 58% of adults in 78959 typically vote, near the U.S. average of about 62%. Among adults in 78959, ~20% vote Democratic, ~38% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.
How 78959 compares
Among zip codes within 15 miles, 78959 is the least Republican-leaning.
78959 runs about 16 points more Republican than Texas as a whole.
Politics vary noticeably by block within 78959. The northeast side is the most Republican-leaning (R+55) and the east side is the least Republican-leaning (R+21), a spread of about 34 points.
Why 78959 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 78959, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 5% of residents in 78959 live in densely developed areas, about 29 points below the Texas average of 35%.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 78959, TX 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 78959 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 78959 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 49%, about 11 points below 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.