77489 is a Democratic stronghold. About 84% of voters here vote Democratic and 16% Republican.
About 58% of adults in 77489 typically vote, near the U.S. average of about 62%. Among adults in 77489, ~49% vote Democratic, ~9% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.
How 77489 compares
Among zip codes within 15 miles, 77489 leans more Democratic than 55 of 58 neighbors.
77489 runs about 82 points more Democratic than Texas as a whole. Texas leans Republican overall, while 77489 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 77489. The northeast side is the most Democratic-leaning (D+78) and the northwest side is the least Democratic-leaning (D+43), a spread of about 34 points.
Why 77489 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 77489, not a ranked or complete list of what matters most.
Density combined with diversity predicts Democratic voting. Non-Hispanic white share in 77489 is about 5%, about 68 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 37% of adults in 77489 have never been married, above 83% of zip codes. 77489 runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; 77489, TX sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 77489 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 77489 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.