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

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

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

 

About 41% of adults in Rainbow Hills typically vote, below the U.S. average of about 62%. Among adults in Rainbow Hills, ~25% vote Democratic, ~16% Republican, and ~59% don't vote. The map below shows estimated turnout by block group.

How Rainbow Hills compares

Among neighborhoods within 5 miles, Rainbow Hills leans more Democratic than 8 of 13 neighbors.

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

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

Dense areas vote Democratic. More than 99% of residents in Rainbow Hills live in densely developed areas, about 64 points above the U.S. average of 36%. Rainbow Hills runs against the grain of Texas, a Democratic-leaning pocket in a Republican-leaning state.

High-school completion, developed land, and voter turnout

Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as Rainbow Hills, San Antonio, TX does.

Why turnout in Rainbow Hills looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Rainbow 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 44%, about 10 points below the Texas average of 54%. Low high-school completion lines up with lower turnout, and about 82% of adults in Rainbow Hills have completed high school, below 82% of neighborhoods. 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.