78733 leans slightly Democratic by roughly 8 points: about 54% of voters vote Democratic and 46% Republican.
About 76% of adults in 78733 typically vote, above the U.S. average of about 62%. Among adults in 78733, ~41% vote Democratic, ~35% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How 78733 compares
Among zip codes within 15 miles, 78733 leans more Democratic than 7 of 46 neighbors.
78733 runs about 22 points more Democratic than Texas as a whole. Texas leans Republican overall, while 78733 is one of the few Democratic-leaning pockets.
Why 78733 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 78733, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 76% of adults in 78733 hold a bachelor's degree, about 47 points above the U.S. average of 28%. 78733 runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 78733, TX sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 78733 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 78733 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 74%, about 14 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 90% of households in 78733 own their home, compared to around 67% in nearby zip codes. High high-school completion lines up with higher turnout, and about 99% of adults in 78733 have completed high school, above 96% 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.