57536 is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 50% of adults in 57536 typically vote, below the U.S. average of about 62%. Among adults in 57536, ~11% vote Democratic, ~39% Republican, and ~50% don't vote. The map below shows estimated turnout by block group.
How 57536 compares
57536 sits in a sparsely populated area with few comparable zip codes nearby.
57536 runs about 29 points more Republican than South Dakota as a whole.
Politics vary noticeably by block within 57536. The northeast side is the most Republican-leaning (R+67) and the east side is the least Republican-leaning (R+57), a spread of about 10 points.
Why 57536 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 57536, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. 57536 sits in the bottom quarter on density and about 93% of residents are non-Hispanic white, about 12 points above the South Dakota average of 81%.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 57536, SD sits in the bottom tenth nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 57536 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 57536 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%. 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.