77087 leans Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 32% of adults in 77087 typically vote, below the U.S. average of about 62%. Among adults in 77087, ~21% vote Democratic, ~11% Republican, and ~68% don't vote. The map below shows estimated turnout by block group.
How 77087 compares
Among zip codes within 15 miles, 77087 leans more Democratic than 52 of 81 neighbors.
77087 runs about 44 points more Democratic than Texas as a whole. Texas leans Republican overall, while 77087 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 77087. The southwest side is the most Democratic-leaning (D+56) and the east side is the least Democratic-leaning (D+12), a spread of about 44 points.
Why 77087 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 77087, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 99% of residents in 77087 live in densely developed areas, about 62 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 41% of adults in 77087 have never been married, above 89% of zip codes. 77087 runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 77087, TX sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 77087 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77087 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 40%, about 13 points below the Texas average of 54%. Renters vote less often than owners, and about 46% of households in 77087 rent, about 21 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 62% of adults in 77087 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.