77587 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 33% of adults in 77587 typically vote, below the U.S. average of about 62%. Among adults in 77587, ~17% vote Democratic, ~16% Republican, and ~67% don't vote. The map below shows estimated turnout by block group.
How 77587 compares
Among zip codes within 15 miles, 77587 leans more Democratic than 20 of 64 neighbors.
77587 runs about 21 points more Democratic than Texas as a whole. Texas leans Republican overall, while 77587 is one of the few Democratic-leaning pockets.
Why 77587 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 77587, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 77587 live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 39% of adults in 77587 have never been married, above 86% of zip codes. 77587 runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 77587, TX sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 77587 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77587 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 42%, about 12 points below the Texas average of 54%. Renters vote less often than owners, and about 43% of households in 77587 rent, about 18 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 58% of adults in 77587 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.