South Main is a Democratic stronghold. About 80% of voters here vote Democratic and 20% Republican.
About 40% of adults in South Main typically vote, below the U.S. average of about 62%. Among adults in South Main, ~32% vote Democratic, ~8% Republican, and ~60% don't vote. The map below shows estimated turnout by block group.
How South Main compares
Among neighborhoods within 5 miles, South Main is the most Democratic-leaning.
South Main runs about 74 points more Democratic than Texas as a whole. Texas leans Republican overall, while South Main is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within South Main. The north side is the most Democratic-leaning (D+76) and the southwest side is the least Democratic-leaning (D+45), a spread of about 31 points.
Why South Main leans the way it does
This analysis examined 14,881 data points per neighborhood to find what predicts political lean and turnout. The items below are a few correlations that stood out for South Main, not a ranked or complete list of what matters most.
South Main votes against the grain of Texas. Texas leans Republican overall, while South Main runs about 74 points more Democratic. A high never-married share predicts Democratic voting, and about 56% of adults in South Main have never been married, above 89% of neighborhoods.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; South Main, Houston, TX sits in the bottom quarter nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in South Main looks the way it does
Renters vote less often than owners. About 84% of households in South Main rent, about 59 points above the U.S. average of 25%. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Willow Meadows-Willowbend Area, Houston, TX D+36
- Medical, Houston, TX D+41
- West University, Houston, TX D+14
- Rice, Houston, TX D+39
- Central Southwest, Houston, TX D+51
- Meyerland, Houston, TX D+29
- Westbury, Houston, TX D+43
- River Oaks, Houston, TX D+11
- Montrose, Houston, TX D+39
- Midtown, Houston, TX D+42
Neighborhoods with Similar Populations
- Seward, Minneapolis, MN D+78
- Hamilton Main Street Historic District, Hamilton, OH R+14
- Polonia, Milwaukee, WI D+32
- Venable, Charlottesville, VA D+59
- San Andreas, Highland, CA D+13
- Columbia Street Waterfront District, Brooklyn, NY D+78
- South Park, Buffalo, NY D+7
- Cumberland, Atlanta, GA D+43
- Bayshore Beautiful, Tampa, FL R+5
- Bryn Mawr, Yonkers, NY D+6
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.