57725 is a Republican stronghold. About 17% of voters here vote Democratic and 83% Republican.
About 45% of adults in 57725 typically vote, below the U.S. average of about 62%. Among adults in 57725, ~8% vote Democratic, ~37% Republican, and ~55% don't vote. The map below shows estimated turnout by block group.
How 57725 compares
Among zip codes within 15 miles, 57725 leans more Republican than 3 of 4 neighbors.
57725 runs about 38 points more Republican than South Dakota as a whole.
Why 57725 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 57725, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 79% of households in 57725 are family households, about 12 points above the U.S. average of 67%. Rural areas vote Republican, and 57725 sits in the bottom quarter on density (about 4%, below 90% of zip codes).
Population density and Republican lean
Places with low population density tend to lean Republican; 57725, SD sits in the bottom quarter nationally on this measure.
Why turnout in 57725 looks the way it does
Turnout in 57725 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.