57750 leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 63% of adults in 57750 typically vote, near the U.S. average of about 62%. Among adults in 57750, ~23% vote Democratic, ~40% Republican, and ~37% don't vote. The map below shows estimated turnout by block group.
How 57750 compares
Politically, 57750 sits close to the rest of South Dakota.
Politics vary noticeably by block within 57750. The northwest side is the most Republican-leaning (R+73) and the east side is the least Republican-leaning (R+12), a spread of about 62 points.
Why 57750 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 57750, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 78% of households in 57750 are family households, about 11 points above the U.S. average of 67%. Rural areas vote Republican, and 57750 sits in the bottom quarter on density (about 1%, below 97% of zip codes).
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 57750, SD sits in the bottom quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 57750 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 57750 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 49%, about 17 points below the South Dakota average of 66%. 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.