78379 leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 54% of adults in 78379 typically vote, below the U.S. average of about 62%. Among adults in 78379, ~20% vote Democratic, ~34% Republican, and ~46% don't vote. The map below shows estimated turnout by block group.
How 78379 compares
78379 sits in a sparsely populated area with few comparable zip codes nearby.
78379 runs about 13 points more Republican than Texas as a whole.
Politics vary noticeably by block within 78379. The southeast side is the most Republican-leaning (R+35) and the northwest side is the least Republican-leaning (R+18), a spread of about 16 points.
Why 78379 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 78379, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 83% of households in 78379 are family households, about 16 points above the U.S. average of 67%. Rural areas vote Republican, and 78379 sits in the bottom quarter on density (about 3%, below 92% of zip codes).
Developed land and Republican lean
Places with a rural land-use pattern tend to lean Republican; 78379, TX sits in the bottom tenth nationally on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 78379 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 78379 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 22%, about 12 points above the U.S. average of 10%. High-crime urban areas turn out at lower rates, and 78379 sits in the top 15% on a violent-crime measure. 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.