77517 is a Republican stronghold. About 19% of voters here vote Democratic and 81% Republican.
About 77% of adults in 77517 typically vote, above the U.S. average of about 62%. Among adults in 77517, ~15% vote Democratic, ~63% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.
How 77517 compares
Among zip codes within 15 miles, 77517 leans more Republican than 16 of 17 neighbors.
77517 runs about 48 points more Republican than Texas as a whole.
Why 77517 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 77517, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 84% of residents in 77517 drive to work alone, about 10 points above the U.S. average of 74%. A high family-household share predicts Republican voting, and about 80% of households in 77517 are family households, above 92% of zip codes.
Renting and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; 77517, TX sits in the bottom quarter nationally on this measure.
Why turnout in 77517 looks the way it does
Homeowners vote more often than renters. About 88% of households in 77517 own their home, about 14 points above the Texas average of 75%. Limited routine healthcare access lines up with lower turnout, and 77517 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.