78330 leans Republican by roughly 20 points: about 40% of voters vote Democratic and 60% Republican.
About 71% of adults in 78330 typically vote, above the U.S. average of about 62%. Among adults in 78330, ~28% vote Democratic, ~43% Republican, and ~29% don't vote. The map below shows estimated turnout by block group.
How 78330 compares
Among zip codes within 15 miles, 78330 leans more Republican than 4 of 6 neighbors.
78330 runs about 6 points more Republican than Texas as a whole.
Why 78330 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 78330. The lean here lands roughly where demographic data alone would predict.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; 78330, TX sits in the top tenth nationally on this measure.
Why turnout in 78330 looks the way it does
Homeowners vote more often than renters. About 92% of households in 78330 own their home, about 17 points above the Texas average of 75%. Limited routine healthcare access lines up with lower turnout, and 78330 sits in the bottom quarter on routine-care measures. 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.