78830 is a true toss-up. About 50% of voters here vote Democratic and 50% Republican.
About 54% of adults in 78830 typically vote, below the U.S. average of about 62%. Among adults in 78830, ~27% vote Democratic, ~27% Republican, and ~46% don't vote. The map below shows estimated turnout by block group.
How 78830 compares
78830 runs about 14 points more Democratic than Texas as a whole. Texas leans Republican overall, while 78830 sits closer to the political middle.
Why 78830 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 78830, not a ranked or complete list of what matters most.
78830 votes against the grain of Texas. Texas leans Republican overall, while 78830 runs about 14 points more Democratic.
High-school completion, uninsured rate, and voter turnout
Places that combine low high-school-completion share and a high uninsured rate tend to turn out at a lower rate, as 78830, TX does.
Why turnout in 78830 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 78830 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 36%, about 18 points below the Texas average of 54%. Renters vote less often than owners, and about 43% of households in 78830 rent, about 18 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 49% of adults in 78830 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.