77580 is a Republican stronghold. About 18% of voters here vote Democratic and 82% Republican.
About 85% of adults in 77580 typically vote, above the U.S. average of about 62%. Among adults in 77580, ~15% vote Democratic, ~70% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How 77580 compares
Among zip codes within 15 miles, 77580 leans more Republican than 6 of 7 neighbors.
77580 runs about 51 points more Republican than Texas as a whole.
Why 77580 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 77580, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 84% of households in 77580 are family households, about 17 points above the U.S. average of 67%.
Renting and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; 77580, TX sits in the bottom tenth nationally on this measure.
Why turnout in 77580 looks the way it does
Homeowners vote more often than renters. About 96% of households in 77580 own their home, about 22 points above the Texas average of 75%. High high-school completion lines up with higher turnout, and more than 99% of adults in 77580 have completed high school, in the top 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.