57028 leans Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 66% of adults in 57028 typically vote, near the U.S. average of about 62%. Among adults in 57028, ~23% vote Democratic, ~43% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How 57028 compares
Among zip codes within 15 miles, 57028 is the least Republican-leaning.
Politically, 57028 sits close to the rest of South Dakota.
Politics vary noticeably by block within 57028. The northwest side is the most Republican-leaning (R+50) and the north side is the least Republican-leaning (R+26), a spread of about 24 points.
Why 57028 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 57028. The lean here lands roughly where demographic data alone would predict.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 57028, SD sits above the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 57028 looks the way it does
Turnout in 57028 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.