57337 is a Republican stronghold. About 23% of voters here vote Democratic and 77% Republican.
About 67% of adults in 57337 typically vote, near the U.S. average of about 62%. Among adults in 57337, ~15% vote Democratic, ~51% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How 57337 compares
Among zip codes within 15 miles, 57337 leans more Republican than 1 of 4 neighbors.
57337 runs about 25 points more Republican than South Dakota as a whole.
Why 57337 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 57337, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In 57337, about 97% of residents are non-Hispanic white, about 25 points above the U.S. average of 72%; about 18% of adults hold a bachelor's degree, about 7 points below the South Dakota average of 26%.
Population density and Republican lean
Places with low population density tend to lean Republican; 57337, SD sits in the bottom tenth nationally on this measure.
Why turnout in 57337 looks the way it does
Homeowners vote more often than renters. About 91% of households in 57337 own their home, about 14 points above the South Dakota average of 77%. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.