57794 is a Democratic stronghold. About 79% of voters here vote Democratic and 21% Republican.
About 34% of adults in 57794 typically vote, below the U.S. average of about 62%. Among adults in 57794, ~26% vote Democratic, ~7% Republican, and ~67% don't vote. The map below shows estimated turnout by block group.
How 57794 compares
Among zip codes within 15 miles, 57794 leans more Democratic than 3 of 5 neighbors.
57794 runs about 88 points more Democratic than South Dakota as a whole. South Dakota leans Republican overall, while 57794 is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within 57794. The south side is the most Democratic-leaning (D+67) and the northwest side is the least Democratic-leaning (D+57), a spread of about 10 points.
Why 57794 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 57794, not a ranked or complete list of what matters most.
57794 votes against the grain of South Dakota. South Dakota leans Republican overall, while 57794 runs about 88 points more Democratic. A high never-married share predicts Democratic voting, and about 67% of adults in 57794 have never been married, in the top fraction of zip codes.
High-school completion, uninsured rate, and voter turnout
Places that combine low high-school-completion share and a high uninsured rate tend to turn out at a lower rate, as 57794, SD does.
Why turnout in 57794 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 57794 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 33%, about 33 points below the South Dakota average of 66%. Renters vote less often than owners, and about 74% of households in 57794 rent, compared to around 47% in nearby zip codes. Low high-school completion lines up with lower turnout, and about 62% of adults in 57794 have completed high school, in the bottom fraction of zip codes. 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.