75939 leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 47% of adults in 75939 typically vote, below the U.S. average of about 62%. Among adults in 75939, ~15% vote Democratic, ~32% Republican, and ~53% don't vote. The map below shows estimated turnout by block group.
How 75939 compares
Among zip codes within 15 miles, 75939 is the least Republican-leaning.
75939 runs about 22 points more Republican than Texas as a whole.
Politics vary noticeably by block within 75939. The northwest side is the most Republican-leaning (R+70) and the west side is the least Republican-leaning (R+11), a spread of about 60 points.
Why 75939 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 75939, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 77% of households in 75939 are family households, about 10 points above the U.S. average of 67%. Low college attainment predicts Republican voting, and 75939 sits in the bottom quarter (about 13%, below 89% of zip codes).
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 75939, TX sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 75939 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 75939 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 50%, about 10 points below the U.S. average of 60%. Low high-school completion lines up with lower turnout, and about 76% of adults in 75939 have completed high school, below 95% 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.