57783 leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 68% of adults in 57783 typically vote, above the U.S. average of about 62%. Among adults in 57783, ~23% vote Democratic, ~45% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How 57783 compares
Among zip codes within 15 miles, 57783 is the least Republican-leaning.
Politically, 57783 sits close to the rest of South Dakota.
Politics vary noticeably by block within 57783. The northeast side is the most Republican-leaning (R+53) and the south side is the least Republican-leaning (R+7), a spread of about 45 points.
Why 57783 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 57783. The lean here lands roughly where demographic data alone would predict.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; 57783, SD sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in 57783 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 57783 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 72%, about 12 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in 57783 have completed high school, above 83% 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.