78163 is a Republican stronghold. About 25% of voters here vote Democratic and 75% Republican.
About 82% of adults in 78163 typically vote, above the U.S. average of about 62%. Among adults in 78163, ~20% vote Democratic, ~62% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How 78163 compares
Among zip codes within 15 miles, 78163 leans more Republican than 12 of 14 neighbors.
78163 runs about 36 points more Republican than Texas as a whole.
Why 78163 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 78163, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 85% of households in 78163 are family households, about 18 points above the U.S. average of 67%.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 78163, TX sits in the bottom quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 78163 looks the way it does
Homeowners vote more often than renters. About 95% of households in 78163 own their home, about 21 points above the Texas average of 75%. High high-school completion lines up with higher turnout, and about 96% of adults in 78163 have completed high school, above 82% 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.