57702 leans Republican by roughly 26 points: about 37% of voters vote Democratic and 63% Republican.
About 80% of adults in 57702 typically vote, above the U.S. average of about 62%. Among adults in 57702, ~30% vote Democratic, ~50% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How 57702 compares
Among zip codes within 15 miles, 57702 leans more Republican than 1 of 7 neighbors.
Politically, 57702 sits close to the rest of South Dakota.
Politics vary noticeably by block within 57702. The southwest side is the most Republican-leaning (R+40) and the east side is the least Republican-leaning (R+13), a spread of about 27 points.
Why 57702 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 57702. The lean here lands roughly where demographic data alone would predict.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as 57702, SD does.
Why turnout in 57702 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 57702 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 74%, about 14 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in 57702 have completed high school, above 90% 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.