78608 is a Republican stronghold. About 17% of voters here vote Democratic and 83% Republican.
About 72% of adults in 78608 typically vote, above the U.S. average of about 62%. Among adults in 78608, ~12% vote Democratic, ~60% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How 78608 compares
Among zip codes within 15 miles, 78608 is the most Republican-leaning.
78608 runs about 53 points more Republican than Texas as a whole.
Why 78608 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 78608, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 80% of households in 78608 are family households, about 13 points above the U.S. average of 67%. Rural areas vote Republican, and 78608 sits in the bottom quarter on density (about 3%, below 92% of zip codes).
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 78608, TX sits in the bottom quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 78608 looks the way it does
Homeowners vote more often than renters. About 96% of households in 78608 own their home, about 22 points above the Texas average of 75%. Limited routine healthcare access lines up with lower turnout, and 78608 sits in the bottom quarter on routine-care measures. High high-school completion lines up with higher turnout, and about 98% of adults in 78608 have completed high school, above 92% 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.