79938 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 43% of adults in 79938 typically vote, below the U.S. average of about 62%. Among adults in 79938, ~23% vote Democratic, ~20% Republican, and ~57% don't vote. The map below shows estimated turnout by block group.
How 79938 compares
Among zip codes within 15 miles, 79938 leans more Democratic than 7 of 19 neighbors.
79938 runs about 20 points more Democratic than Texas as a whole. Texas leans Republican overall, while 79938 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 79938. The southwest side runs the most Democratic (D+11) and the north side runs the most Republican (R+5), a spread of about 16 points.
Why 79938 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 79938, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 79938 is about 9%, about 63 points below the U.S. average of 72%. 79938 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; 79938, TX sits in the top quarter nationally on this measure.
Why turnout in 79938 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 79938 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The uninsured rate here is about 26%, about 7 points above the Texas average of 19%. Low high-school completion lines up with lower turnout, and about 86% of adults in 79938 have completed high school, below 79% 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.