77077 leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 54% of adults in 77077 typically vote, below the U.S. average of about 62%. Among adults in 77077, ~33% vote Democratic, ~21% Republican, and ~46% don't vote. The map below shows estimated turnout by block group.
How 77077 compares
Among zip codes within 15 miles, 77077 leans more Democratic than 38 of 61 neighbors.
77077 runs about 37 points more Democratic than Texas as a whole. Texas leans Republican overall, while 77077 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 77077. The southeast side runs the most Democratic (D+35) and the west side runs the most Republican (R+6), a spread of about 41 points.
Why 77077 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 77077, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in 77077 live in densely developed areas, about 63 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 77077 sits in the top quarter (about 58%, above 93% of zip codes). 77077 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; 77077, 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 77077 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77077 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 60% of households in 77077 rent, about 35 points above the U.S. average of 25%. 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.