East Terrell Hills, San Antonio, TX Political Map | Democrat & Republican Areas in East Terrell Hills

By the BestNeighborhood data science team. Last updated May 2026.

East Terrell Hills leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.

 

About 30% of adults in East Terrell Hills typically vote, below the U.S. average of about 62%. Among adults in East Terrell Hills, ~17% vote Democratic, ~13% Republican, and ~70% don't vote. The map below shows estimated turnout by block group.

How East Terrell Hills compares

Among neighborhoods within 5 miles, East Terrell Hills leans more Democratic than 4 of 18 neighbors.

East Terrell Hills runs about 27 points more Democratic than Texas as a whole. Texas leans Republican overall, while East Terrell Hills is one of the few Democratic-leaning pockets.

Politics vary noticeably by block within East Terrell Hills. The southeast side is the most Democratic-leaning (D+22) and the southwest side is the least Democratic-leaning (D+10), a spread of about 12 points.

Why East Terrell Hills 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 East Terrell Hills, not a ranked or complete list of what matters most.

East Terrell Hills votes against the grain of Texas. Texas leans Republican overall, while East Terrell Hills runs about 27 points more Democratic.

Cancer-screening access and voter turnout

Places with low colon-cancer-screening access tend to turn out at a lower rate; East Terrell Hills, San Antonio, 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 East Terrell Hills looks the way it does

Areas with limited routine healthcare access turn out at lower rates. East Terrell Hills 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 47%, about 6 points below the Texas average of 54%. Low high-school completion lines up with lower turnout, and about 77% of adults in East Terrell Hills have completed high school, below 89% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.

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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.