Summerset leans heavily Republican by roughly 46 points: about 27% of voters vote Democratic and 73% Republican.
About 74% of adults in Summerset typically vote, above the U.S. average of about 62%. Among adults in Summerset, ~20% vote Democratic, ~54% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Summerset compares
Among cities within 25 miles, Summerset leans more Republican than 12 of 31 neighbors.
Summerset runs about 17 points more Republican than South Dakota as a whole.
Politics vary noticeably by neighborhood within Summerset. The northwest side is the most Republican-leaning (R+53) and the east side is the least Republican-leaning (R+37), a spread of about 16 points.
Why Summerset 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 Summerset, not a ranked or complete list of what matters most.
Car-dependent areas vote Republican. About 86% of residents in Summerset drive to work alone, about 12 points above the U.S. average of 74%.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Summerset, SD does.
Why turnout in Summerset looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Summerset is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 73%, about 13 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Summerset have completed high school, above 92% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Black Hawk, SD R+46
- Piedmont, SD R+58
- Bethlehem, SD R+61
- Sulphur, SD R+35
- Johnson Siding, SD R+40
- Nemo, SD R+54
- Rapid City, SD R+22
- Tilford, SD R+62
- Ashland Heights, SD R+46
- Silver City, SD R+42
Cities with Similar Populations
- Cordova, SC D+6
- Columbia, CA R+18
- Twain Harte, CA R+11
- Squaw Valley, CA R+43
- Addison, NY R+56
- Kingman, KS R+49
- Lily, KY R+69
- Chouteau, OK R+59
- Altha, FL R+79
- Warden, WA R+38
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from South Dakota Secretary of State, Elections, 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.