57319 is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 66% of adults in 57319 typically vote, near the U.S. average of about 62%. Among adults in 57319, ~14% vote Democratic, ~52% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How 57319 compares
Among zip codes within 15 miles, 57319 leans more Republican than 4 of 7 neighbors.
57319 runs about 28 points more Republican than South Dakota as a whole.
Why 57319 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 57319, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. 57319 sits in the bottom quarter on density and about 96% of residents are non-Hispanic white, about 15 points above the South Dakota average of 81%.
Park access and Republican lean
Places with low park coverage tend to lean Republican; 57319, SD sits in the bottom tenth nationally on this measure. Park access does not change how people vote; it tends to track denser, higher-income areas.
Why turnout in 57319 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 57319 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 71%, about 11 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in 57319 have completed high school, above 80% 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.