77705 leans Democratic by roughly 24 points: about 62% of voters vote Democratic and 38% Republican.
About 46% of adults in 77705 typically vote, below the U.S. average of about 62%. Among adults in 77705, ~29% vote Democratic, ~17% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 77705 compares
Among zip codes within 15 miles, 77705 leans more Democratic than 8 of 14 neighbors.
77705 runs about 38 points more Democratic than Texas as a whole. Texas leans Republican overall, while 77705 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 77705. The north side runs the most Democratic (D+77) and the southwest side runs the most Republican (R+64), a spread of about 141 points.
Why 77705 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 77705, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 77705 is about 28%, about 45 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 47% of adults in 77705 have never been married, above 93% of zip codes. 77705 runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 77705, TX sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 77705 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77705 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 44%, about 10 points below the Texas average of 54%. Renters vote less often than owners, and about 41% of households in 77705 rent, about 16 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 82% of adults in 77705 have completed high school, below 88% 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.