75231 leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 41% of adults in 75231 typically vote, below the U.S. average of about 62%. Among adults in 75231, ~27% vote Democratic, ~14% Republican, and ~59% don't vote. The map below shows estimated turnout by block group.
How 75231 compares
Among zip codes within 15 miles, 75231 leans more Democratic than 55 of 76 neighbors.
75231 runs about 45 points more Democratic than Texas as a whole. Texas leans Republican overall, while 75231 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 75231. The southwest side runs the most Democratic (D+40) and the north side runs the most Republican (R+8), a spread of about 48 points.
Why 75231 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 75231, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 94% of residents in 75231 live in densely developed areas, about 58 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 45% of adults in 75231 have never been married, above 92% of zip codes. 75231 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; 75231, TX sits in the top tenth nationally on this measure.
Why turnout in 75231 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 75231 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 50%, about 10 points below the U.S. average of 60%. Renters vote less often than owners, and about 80% of households in 75231 rent, compared to around 51% in nearby zip codes. 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.