75078 leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 82% of adults in 75078 typically vote, above the U.S. average of about 62%. Among adults in 75078, ~29% vote Democratic, ~53% Republican, and ~18% don't vote. The map below shows estimated turnout by block group.
How 75078 compares
Among zip codes within 15 miles, 75078 leans more Republican than 18 of 21 neighbors.
75078 runs about 14 points more Republican than Texas as a whole.
Politics vary noticeably by block within 75078. The northwest side is the most Republican-leaning (R+40) and the west side is the least Republican-leaning (R+15), a spread of about 25 points.
Why 75078 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 75078, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 90% of households in 75078 are family households, about 24 points above the U.S. average of 67%. Dense places usually vote Democratic, but 75078 runs against that pattern.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 75078, TX sits in the top quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 75078 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 75078 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 69%, about 9 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 90% of households in 75078 own their home, above 85% of zip codes. High high-school completion lines up with higher turnout, and about 98% of adults in 75078 have completed high school, above 93% 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.