Sumner is a Republican stronghold. About 12% of voters here vote Democratic and 88% Republican.
About 80% of adults in Sumner typically vote, above the U.S. average of about 62%. Among adults in Sumner, ~10% vote Democratic, ~70% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How Sumner compares
Among cities within 25 miles, Sumner leans more Republican than 28 of 57 neighbors.
Sumner runs about 63 points more Republican than Texas as a whole.
Why Sumner leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Sumner, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 12% of adults in Sumner hold a bachelor's degree, about 14 points below the Texas average of 26%.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Sumner, TX sits in the bottom quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Sumner looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Sumner 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.
Nearby Cities
- Maxey, TX R+78
- Unity, TX R+79
- Emberson, TX R+78
- Brookston, TX R+76
- Cavines, TX R+76
- Georgia, TX R+79
- Toco, TX R+69
- Biardstown, TX R+45
- Direct, TX R+80
Cities with Similar Populations
- New Plymouth, OH R+57
- Dona Ana, NM R+17
- Bellwood, KY R+53
- Presque Isle, WI R+21
- Chain-O-Lakes, MO R+65
- Saratoga, NC Even
- Venedocia, OH R+72
- Avery, CA R+8
- Bowersville, OH R+70
- Walcott, AR R+70
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.