57780 is a true toss-up. About 51% of voters here vote Democratic and 49% Republican.
About 44% of adults in 57780 typically vote, below the U.S. average of about 62%. Among adults in 57780, ~22% vote Democratic, ~22% Republican, and ~56% don't vote. The map below shows estimated turnout by block group.
How 57780 compares
57780 runs about 30 points more Democratic than South Dakota as a whole. South Dakota leans Republican overall, while 57780 sits closer to the political middle.
Politics vary noticeably by block within 57780. The southeast side runs the most Democratic (D+59) and the northeast side runs the most Republican (R+77), a spread of about 136 points.
Why 57780 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 57780, not a ranked or complete list of what matters most.
57780 votes against the grain of South Dakota. South Dakota leans Republican overall, while 57780 runs about 30 points more Democratic.
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 57780, SD does.
Why turnout in 57780 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 57780 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 47%, about 19 points below the South Dakota average of 66%. Renters vote less often than owners, and about 44% of households in 57780 rent, about 19 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 66% of adults in 57780 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.