77855 is a Republican stronghold. About 14% of voters here vote Democratic and 86% Republican.
About 59% of adults in 77855 typically vote, near the U.S. average of about 62%. Among adults in 77855, ~8% vote Democratic, ~51% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How 77855 compares
Among zip codes within 15 miles, 77855 is the least Republican-leaning.
77855 runs about 58 points more Republican than Texas as a whole.
Why 77855 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 77855, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 83% of residents in 77855 drive to work alone, about 10 points above the U.S. average of 74%.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 77855, TX sits below the national average 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 77855 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77855 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. High-crime urban areas turn out at lower rates, and 77855 sits in the top 15% on a violent-crime measure. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
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.