79404 leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 46% of adults in 79404 typically vote, below the U.S. average of about 62%. Among adults in 79404, ~25% vote Democratic, ~21% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How 79404 compares
Among zip codes within 15 miles, 79404 leans more Democratic than 18 of 21 neighbors.
79404 runs about 23 points more Democratic than Texas as a whole. Texas leans Republican overall, while 79404 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 79404. The northeast side runs the most Democratic (D+73) and the southeast side runs the most Republican (R+34), a spread of about 108 points.
Why 79404 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 79404, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 79404 is about 18%, about 54 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 42% of adults in 79404 have never been married, above 90% of zip codes. 79404 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; 79404, 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 79404 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 79404 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 41%, about 13 points below the Texas average of 54%. Low high-school completion lines up with lower turnout, and about 73% of adults in 79404 have completed high school, below 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.