78359 is a true toss-up. About 52% of voters here vote Democratic and 48% Republican.
About 58% of adults in 78359 typically vote, near the U.S. average of about 62%. Among adults in 78359, ~30% vote Democratic, ~28% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.
How 78359 compares
Among zip codes within 15 miles, 78359 leans more Democratic than 9 of 15 neighbors.
78359 runs about 18 points more Democratic than Texas as a whole. Texas leans Republican overall, while 78359 is one of the few Democratic-leaning pockets.
Why 78359 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 78359, not a ranked or complete list of what matters most.
78359 votes against the grain of Texas. Texas leans Republican overall, while 78359 runs about 18 points more Democratic.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 78359, TX sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 78359 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 78359 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 34%, about 19 points below the Texas average of 54%. Renters vote less often than owners, and about 36% of households in 78359 rent, above 82% of zip codes. Low high-school completion lines up with lower turnout, and about 64% of adults in 78359 have completed high school, in the bottom 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.