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

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

Ventura leans Democratic by roughly 22 points: about 61% of voters vote Democratic and 39% Republican.

 

About 54% of adults in Ventura typically vote, below the U.S. average of about 62%. Among adults in Ventura, ~33% vote Democratic, ~21% Republican, and ~46% don't vote. The map below shows estimated turnout by block group.

How Ventura compares

Among neighborhoods within 5 miles, Ventura leans more Democratic than 4 of 12 neighbors.

Ventura runs about 36 points more Democratic than Texas as a whole. Texas leans Republican overall, while Ventura is one of the few Democratic-leaning pockets.

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

Ventura votes against the grain of Texas. Texas leans Republican overall, while Ventura runs about 36 points more Democratic.

Population density and Democratic lean

Places with high population density tend to lean Democratic; Ventura, San Antonio, TX sits above the national average on this measure.

Why turnout in Ventura looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Ventura is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.