77550 leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About 47% of adults in 77550 typically vote, below the U.S. average of about 62%. Among adults in 77550, ~30% vote Democratic, ~17% Republican, and ~53% don't vote. The map below shows estimated turnout by block group.
How 77550 compares
Among zip codes within 15 miles, 77550 leans more Democratic than 7 of 8 neighbors.
77550 runs about 43 points more Democratic than Texas as a whole. Texas leans Republican overall, while 77550 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 77550. The west side is the most Democratic-leaning (D+50) and the northwest side is the least Democratic-leaning (D+8), a spread of about 42 points.
Why 77550 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 77550, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 95% of residents in 77550 live in densely developed areas, about 59 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 43% of adults in 77550 have never been married, above 90% of zip codes. 77550 runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 77550, TX sits in the top tenth nationally on this measure.
Why turnout in 77550 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77550 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 60% of households in 77550 rent, compared to around 33% in nearby zip codes. High-crime urban areas turn out at lower rates, and 77550 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
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.