57564 is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 80% of adults in 57564 typically vote, above the U.S. average of about 62%. Among adults in 57564, ~17% vote Democratic, ~63% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How 57564 compares
57564 sits in a sparsely populated area with few comparable zip codes nearby.
57564 runs about 29 points more Republican than South Dakota as a whole.
Politics vary noticeably by block within 57564. The southwest side is the most Republican-leaning (R+68) and the north side is the least Republican-leaning (R+55), a spread of about 13 points.
Why 57564 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 57564. The lean here lands roughly where demographic data alone would predict.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 57564, SD sits in the bottom quarter nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 57564 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 57564 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 57564 have completed high school, above 81% 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.