78545 is a true toss-up. About 48% of voters here vote Democratic and 52% Republican.
About 67% of adults in 78545 typically vote, near the U.S. average of about 62%. Among adults in 78545, ~32% vote Democratic, ~35% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.
How 78545 compares
Among zip codes within 15 miles, 78545 leans more Republican than 2 of 3 neighbors.
78545 runs about 9 points more Democratic than Texas as a whole.
Politics vary noticeably by block within 78545. The southwest side is the most split-leaning (R+14) and the east side is the least split-leaning (Even), a spread of about 14 points.
Why 78545 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 78545. The lean here lands roughly where demographic data alone would predict.
Population density, never-married share, and Republican lean
Places that combine low population density and a never-married-heavy adult population tend to lean Republican, as 78545, TX does.
Why turnout in 78545 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 78545 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 38%, about 16 points below the Texas average of 54%. 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.