Milltown is a Republican stronghold. About 15% of voters here vote Democratic and 85% Republican.
About 86% of adults in Milltown typically vote, above the U.S. average of about 62%. Among adults in Milltown, ~13% vote Democratic, ~73% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How Milltown compares
Among cities within 25 miles, Milltown leans more Republican than 16 of 24 neighbors.
Milltown runs about 40 points more Republican than South Dakota as a whole.
Why Milltown 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 Milltown, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. Milltown sits in the bottom quarter on density and about 97% of residents are non-Hispanic white, about 16 points above the South Dakota average of 81%.
Population density and Republican lean
Places with low population density tend to lean Republican; Milltown, SD sits in the bottom tenth nationally on this measure.
Why turnout in Milltown looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Milltown 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 69%, about 9 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and more than 99% of adults in Milltown have completed high school, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- New Elm Springs Colony, SD R+69
- Tschetter Colony, SD R+67
- Parkston, SD R+66
- Dimock, SD R+71
- Olivet, SD R+70
- Rockport Colony, SD R+72
- Ethan, SD R+66
- Emery, SD R+69
- Tripp, SD R+63
Cities with Similar Populations
- Thebes, AR R+84
- Hooper, WA R+69
- Mentone, TX R+42
- Toad Hop, IN R+46
- Elevon, VA Even
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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.