Roslyn leans heavily Republican by roughly 44 points: about 28% of voters vote Democratic and 72% Republican.
About 68% of adults in Roslyn typically vote, above the U.S. average of about 62%. Among adults in Roslyn, ~19% vote Democratic, ~49% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How Roslyn compares
Among cities within 25 miles, Roslyn leans more Republican than 12 of 15 neighbors.
Roslyn runs about 15 points more Republican than South Dakota as a whole.
Why Roslyn 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 Roslyn, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 4% of residents in Roslyn live in densely developed areas, about 6 points below the South Dakota average of 9%. Low college attainment predicts Republican voting, and Roslyn sits in the bottom quarter (about 15%, below 79% of cities).
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Roslyn, SD 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 Roslyn looks the way it does
Turnout in Roslyn sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Grenville, SD R+31
- Eden, SD R+23
- Webster, SD R+46
- Waubay, SD R+38
- Lake City, SD R+25
- Pierpont, SD R+40
- Bristol, SD R+40
- Langford, SD R+31
- Spain, SD R+29
- Ortley, SD R+39
Cities with Similar Populations
- Ingleside, NY R+27
- Melville, OR R+24
- Richmond, MS R+67
- Leesville, OH R+57
- Meno, OK R+77
- Rocky Gap, VA R+69
- Penfield, IL R+50
- Trumbull, NE R+66
- Mittie, LA R+86
- Ruskin, MN R+40
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.