57548 is a Democratic stronghold. About 87% of voters here vote Democratic and 13% Republican.
About 48% of adults in 57548 typically vote, below the U.S. average of about 62%. Among adults in 57548, ~42% vote Democratic, ~6% Republican, and ~52% don't vote. The map below shows estimated turnout by block group.
How 57548 compares
Among zip codes within 15 miles, 57548 is the most Democratic-leaning.
57548 runs about 103 points more Democratic than South Dakota as a whole. South Dakota leans Republican overall, while 57548 is one of the few Democratic-leaning pockets.
Why 57548 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 57548, not a ranked or complete list of what matters most.
57548 votes against the grain of South Dakota. South Dakota leans Republican overall, while 57548 runs about 103 points more Democratic. A high never-married share predicts Democratic voting, and about 62% of adults in 57548 have never been married, above 98% of zip codes.
Homeownership and voter turnout
Places with renter-heavy households tend to turn out at a lower rate; 57548, SD sits in the bottom tenth nationally on this measure.
Why turnout in 57548 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 57548 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 37%, about 29 points below the South Dakota average of 66%. Renters vote less often than owners, and about 62% of households in 57548 rent, compared to around 29% in nearby zip codes. High-crime urban areas turn out at lower rates, and 57548 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.