77477 leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 48% of adults in 77477 typically vote, below the U.S. average of about 62%. Among adults in 77477, ~30% vote Democratic, ~18% Republican, and ~52% don't vote. The map below shows estimated turnout by block group.
How 77477 compares
Among zip codes within 15 miles, 77477 leans more Democratic than 34 of 57 neighbors.
77477 runs about 39 points more Democratic than Texas as a whole. Texas leans Republican overall, while 77477 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 77477. The northeast side is the most Democratic-leaning (D+57) and the east side is the least Democratic-leaning (D+12), a spread of about 46 points.
Why 77477 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 77477, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 99% of residents in 77477 live in densely developed areas, about 62 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and 77477 sits in the top quarter (about 37%, above 78% of zip codes). 77477 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; 77477, 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 77477 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77477 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 54% of households in 77477 rent, about 30 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.