Mound City, SD Political Map | Democrat & Republican Areas in Mound City

By the BestNeighborhood data science team. Last updated May 2026.

Mound City is a Republican stronghold. About 17% of voters here vote Democratic and 83% Republican.

 

About 58% of adults in Mound City typically vote, near the U.S. average of about 62%. Among adults in Mound City, ~10% vote Democratic, ~48% Republican, and ~42% don't vote. The map below shows estimated turnout by block group.

How Mound City compares

Among cities within 25 miles, Mound City leans more Republican than 4 of 12 neighbors.

Mound City runs about 37 points more Republican than South Dakota as a whole.

Why Mound City leans the way it does

Density, race composition, education, and family structure all sit close to their national averages in Mound City. The lean here lands roughly where demographic data alone would predict.

Paved land cover and Republican lean

Places with little paved surface tend to lean Republican; Mound City, SD sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.

Why turnout in Mound City looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Mound City 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 70%, about 10 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.

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.