77355 is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 77% of adults in 77355 typically vote, above the U.S. average of about 62%. Among adults in 77355, ~16% vote Democratic, ~61% Republican, and ~23% don't vote. The map below shows estimated turnout by block group.
How 77355 compares
Among zip codes within 15 miles, 77355 leans more Republican than 10 of 12 neighbors.
77355 runs about 45 points more Republican than Texas as a whole.
Politics vary noticeably by block within 77355. The west side is the most Republican-leaning (R+65) and the northeast side is the least Republican-leaning (R+51), a spread of about 14 points.
Why 77355 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 77355, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 82% of households in 77355 are family households, about 15 points above the U.S. average of 67%.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 77355, TX sits below the national average on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 77355 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77355 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.