57107 leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 60% of adults in 57107 typically vote, near the U.S. average of about 62%. Among adults in 57107, ~23% vote Democratic, ~37% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How 57107 compares
Among zip codes within 15 miles, 57107 leans more Republican than 7 of 17 neighbors.
57107 runs about 7 points more Democratic than South Dakota as a whole.
Politics vary noticeably by block within 57107. The northwest side is the most Republican-leaning (R+50) and the east side is the least Republican-leaning (R+13), a spread of about 37 points.
Why 57107 leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in 57107. The lean here lands roughly where demographic data alone would predict.
Developed land, local retail density, and voter turnout
Places that combine a heavily developed built environment and sparse local retail within a mile tend to turn out at a lower rate, as 57107, SD does.
Why turnout in 57107 looks the way it does
Turnout in 57107 sits close to the national pattern. 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.