77033 is a Democratic stronghold. About 87% of voters here vote Democratic and 13% Republican.
About 39% of adults in 77033 typically vote, below the U.S. average of about 62%. Among adults in 77033, ~34% vote Democratic, ~5% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.
How 77033 compares
Among zip codes within 15 miles, 77033 leans more Democratic than 83 of 84 neighbors.
77033 runs about 88 points more Democratic than Texas as a whole. Texas leans Republican overall, while 77033 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 77033. The southwest side is the most Democratic-leaning (D+80) and the north side is the least Democratic-leaning (D+66), a spread of about 14 points.
Why 77033 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 77033, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 99% of residents in 77033 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 43% of adults in 77033 have never been married, above 91% of zip codes. 77033 runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 77033, TX sits in the top tenth nationally on this measure.
Why turnout in 77033 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77033 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 35%, about 19 points below the Texas average of 54%. Renters vote less often than owners, and about 39% of households in 77033 rent, compared to around 54% in nearby zip codes. Low high-school completion lines up with lower turnout, and about 70% of adults in 77033 have completed high school, below 98% 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.