77845 leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 69% of adults in 77845 typically vote, above the U.S. average of about 62%. Among adults in 77845, ~30% vote Democratic, ~39% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How 77845 compares
Among zip codes within 15 miles, 77845 leans more Republican than 4 of 8 neighbors.
Politically, 77845 sits close to the rest of Texas.
Politics vary noticeably by block within 77845. The northwest side runs the most Democratic (D+19) and the northeast side runs the most Republican (R+35), a spread of about 54 points.
Why 77845 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 77845, not a ranked or complete list of what matters most.
77845 votes Republican even though it is densely developed (about 69%, far above the Texas average of 35%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; 77845, TX sits in the top quarter nationally on this measure.
Why turnout in 77845 looks the way it does
Areas with high high-school completion turn out at higher rates. About 96% of adults in 77845 have completed high school, about 10 points above the Texas average of 86%. 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.