79930 leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About 39% of adults in 79930 typically vote, below the U.S. average of about 62%. Among adults in 79930, ~25% vote Democratic, ~14% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.
How 79930 compares
Among zip codes within 15 miles, 79930 leans more Democratic than 21 of 26 neighbors.
79930 runs about 43 points more Democratic than Texas as a whole. Texas leans Republican overall, while 79930 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 79930. The southeast side is the most Democratic-leaning (D+35) and the northwest side is the least Democratic-leaning (D+16), a spread of about 18 points.
Why 79930 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 79930, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 92% of residents in 79930 live in densely developed areas, about 56 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 39% of adults in 79930 have never been married, above 87% of zip codes. 79930 runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 79930, TX sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 79930 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 79930 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 42%, about 12 points below the Texas average of 54%. Renters vote less often than owners, and about 50% of households in 79930 rent, compared to around 68% in nearby zip codes. Low high-school completion lines up with lower turnout, and about 73% of adults in 79930 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.