57570 is a Democratic stronghold. About 83% of voters here vote Democratic and 17% Republican.
About 42% of adults in 57570 typically vote, below the U.S. average of about 62%. Among adults in 57570, ~34% vote Democratic, ~7% Republican, and ~59% don't vote. The map below shows estimated turnout by block group.
How 57570 compares
Among zip codes within 15 miles, 57570 is the most Democratic-leaning.
57570 runs about 95 points more Democratic than South Dakota as a whole. South Dakota leans Republican overall, while 57570 is one of the few Democratic-leaning pockets.
Why 57570 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 57570, not a ranked or complete list of what matters most.
57570 votes against the grain of South Dakota. South Dakota leans Republican overall, while 57570 runs about 95 points more Democratic. A high never-married share predicts Democratic voting, and about 52% of adults in 57570 have never been married, above 96% of zip codes.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; 57570, SD sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 57570 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 57570 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 36%, about 30 points below the South Dakota average of 66%. Renters vote less often than owners, and about 52% of households in 57570 rent, about 27 points above the U.S. average of 25%. High-crime urban areas turn out at lower rates, and 57570 sits in the top 15% on a violent-crime measure. 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.