77011 leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 33% of adults in 77011 typically vote, below the U.S. average of about 62%. Among adults in 77011, ~22% vote Democratic, ~11% Republican, and ~67% don't vote. The map below shows estimated turnout by block group.
How 77011 compares
Among zip codes within 15 miles, 77011 leans more Democratic than 54 of 82 neighbors.
77011 runs about 45 points more Democratic than Texas as a whole. Texas leans Republican overall, while 77011 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 77011. The southwest side is the most Democratic-leaning (D+41) and the northeast side is the least Democratic-leaning (D+23), a spread of about 18 points.
Why 77011 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 77011, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 98% of residents in 77011 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 47% of adults in 77011 have never been married, above 93% of zip codes. 77011 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; 77011, 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 77011 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77011 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 48% of households in 77011 rent, about 23 points above the U.S. average of 25%. High-crime urban areas turn out at lower rates, and 77011 sits in the top 15% on a violent-crime measure. 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.