Heritage, San Antonio, TX Political Map | Democrat & Republican Areas in Heritage

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

Heritage leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.

 

About 50% of adults in Heritage typically vote, below the U.S. average of about 62%. Among adults in Heritage, ~30% vote Democratic, ~20% Republican, and ~50% don't vote. The map below shows estimated turnout by block group.

How Heritage compares

Among neighborhoods within 5 miles, Heritage leans more Democratic than 7 of 13 neighbors.

Heritage runs about 34 points more Democratic than Texas as a whole. Texas leans Republican overall, while Heritage is one of the few Democratic-leaning pockets.

Why Heritage 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 Heritage, not a ranked or complete list of what matters most.

Heritage votes against the grain of Texas. Texas leans Republican overall, while Heritage runs about 34 points more Democratic.

Population density and Democratic lean

Places with high population density tend to lean Democratic; Heritage, San Antonio, TX sits in the top quarter nationally on this measure.

Why turnout in Heritage looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Heritage is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The uninsured rate here is about 24%, about 5 points above the Texas average of 19%. Learn more about the findings and methodology on the political spectrum map.

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.