University Park-San Antonio, San Antonio, TX Political Map | Democrat & Republican Areas in University Park-San Antonio

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

University Park-San Antonio leans Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.

 

About 30% of adults in University Park-San Antonio typically vote, below the U.S. average of about 62%. Among adults in University Park-San Antonio, ~20% vote Democratic, ~10% Republican, and ~70% don't vote. The map below shows estimated turnout by block group.

How University Park-San Antonio compares

Among neighborhoods within 5 miles, University Park-San Antonio leans more Democratic than 14 of 35 neighbors.

University Park-San Antonio runs about 43 points more Democratic than Texas as a whole. Texas leans Republican overall, while University Park-San Antonio is one of the few Democratic-leaning pockets.

Why University Park-San Antonio 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 University Park-San Antonio, not a ranked or complete list of what matters most.

Dense areas vote Democratic. More than 99% of residents in University Park-San Antonio live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 50% of adults in University Park-San Antonio have never been married, above 81% of neighborhoods. University Park-San Antonio runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.

Cancer-screening access and voter turnout

Places with low colon-cancer-screening access tend to turn out at a lower rate; University Park-San Antonio, San Antonio, TX sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.

Why turnout in University Park-San Antonio looks the way it does

Areas with limited routine healthcare access turn out at lower rates. University Park-San Antonio 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 45%, about 8 points below the Texas average of 54%. Low high-school completion lines up with lower turnout, and about 69% of adults in University Park-San Antonio have completed high school, below 95% of neighborhoods. High-crime urban areas turn out at lower rates, and University Park-San Antonio sits in the top 15% on a violent-crime measure. 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.