Westport is a Republican stronghold. About 22% of voters here vote Democratic and 78% Republican.
About 72% of adults in Westport typically vote, above the U.S. average of about 62%. Among adults in Westport, ~16% vote Democratic, ~56% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How Westport compares
Among cities within 25 miles, Westport leans more Republican than 1 of 20 neighbors.
Westport runs about 26 points more Republican than South Dakota as a whole.
Why Westport 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 Westport, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. Westport sits in the bottom quarter on density and about 94% of residents are non-Hispanic white, about 13 points above the South Dakota average of 81%.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Westport, 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 Westport looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Westport 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 72%, about 12 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Westport have completed high school, above 83% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Ordway, SD R+56
- Wetonka, SD R+64
- Aberdeen, SD R+31
- Barnard, SD R+57
- Mina, SD R+59
- Columbia, SD R+59
- Willow, SD R+68
- Bath, SD R+57
- Tacoma Park, SD R+58
- Long Lake Colony, SD R+61
Cities with Similar Populations
- Green Valley, TX R+57
- Cedarcreek, TN R+72
- Potter, NE R+74
- Four Towns, MI R+37
- South Byron, NY R+36
- Cluster Springs, VA R+39
- Esto, FL R+79
- Table Grove, IL R+51
- South Sulphur, TX R+73
- Marcoe, IL R+49
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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.