78413 leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 59% of adults in 78413 typically vote, near the U.S. average of about 62%. Among adults in 78413, ~28% vote Democratic, ~31% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 78413 compares
Among zip codes within 15 miles, 78413 leans more Republican than 11 of 17 neighbors.
78413 runs about 8 points more Democratic than Texas as a whole.
Politics vary noticeably by block within 78413. The north side runs the most Democratic (Even) and the southwest side runs the most Republican (R+15), a spread of about 16 points.
Why 78413 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 78413, not a ranked or complete list of what matters most.
78413 votes Republican even though it is densely developed (about 95%, far above the Texas average of 35%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Never-married share, developed land, and voter turnout
Places that combine a never-married-heavy adult population and a heavily developed built environment tend to turn out at a lower rate, as 78413, TX does.
Why turnout in 78413 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 78413 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 20%, about 10 points above the U.S. average of 10%. Renters vote less often than owners, and about 37% of households in 78413 rent, above 84% 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.