78759 leans heavily Democratic by roughly 38 points: about 69% of voters vote Democratic and 31% Republican.
About 71% of adults in 78759 typically vote, above the U.S. average of about 62%. Among adults in 78759, ~49% vote Democratic, ~22% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How 78759 compares
Among zip codes within 15 miles, 78759 leans more Democratic than 24 of 46 neighbors.
78759 runs about 52 points more Democratic than Texas as a whole. Texas leans Republican overall, while 78759 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 78759. The northeast side is the most Democratic-leaning (D+54) and the north side is the least Democratic-leaning (D+28), a spread of about 26 points.
Why 78759 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 78759, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 71% of adults in 78759 hold a bachelor's degree, about 42 points above the U.S. average of 28%. Dense areas vote Democratic, and 78759 sits in the top fifth on density (about 90%, above 87% of zip codes). 78759 runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 78759, 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 78759 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 78759 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 10 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in 78759 have completed high school, above 93% 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.