Spring Branch leans slightly Democratic by roughly 8 points: about 54% of voters vote Democratic and 46% Republican.
About 42% of adults in Spring Branch typically vote, below the U.S. average of about 62%. Among adults in Spring Branch, ~23% vote Democratic, ~19% Republican, and ~58% don't vote. The map below shows estimated turnout by block group.
How Spring Branch compares
Among neighborhoods within 5 miles, Spring Branch leans more Democratic than 1 of 4 neighbors.
Spring Branch runs about 21 points more Democratic than Texas as a whole. Texas leans Republican overall, while Spring Branch is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within Spring Branch. The north side runs the most Democratic (D+16) and the southeast side runs the most Republican (R+2), a spread of about 19 points.
Why Spring Branch 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 Spring Branch, not a ranked or complete list of what matters most.
Spring Branch votes against the grain of Texas. Texas leans Republican overall, while Spring Branch runs about 21 points more Democratic.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Spring Branch, Houston, TX sits in the top quarter nationally on this measure.
Why turnout in Spring Branch looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Spring Branch 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 48%, about 6 points below the Texas average of 54%. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Fairbanks-Northwest Crossing, Houston, TX D+31
- Greater Memorial, Houston, TX R+14
- Oak Forest-Garden Oaks, Houston, TX D+13
- Greater Inwood, Houston, TX D+38
- Near Northwest, Houston, TX D+26
- Galleria-Uptown, Houston, TX D+13
- Westchase, Houston, TX D+21
- West Houston, Houston, TX D+19
- Energy Corridor, Houston, TX D+21
- Acres Home, Houston, TX D+71
Neighborhoods with Similar Populations
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.