77661 leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 52% of adults in 77661 typically vote, below the U.S. average of about 62%. Among adults in 77661, ~19% vote Democratic, ~33% Republican, and ~48% don't vote. The map below shows estimated turnout by block group.
How 77661 compares
77661 sits in a sparsely populated area with few comparable zip codes nearby.
77661 runs about 15 points more Republican than Texas as a whole.
Why 77661 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 77661, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 97% of households in 77661 are family households, about 30 points above the U.S. average of 67%.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; 77661, TX sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 77661 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77661 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 49%, about 11 points below the U.S. average of 60%. 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.