Spring Valley Colony, SD Political Map | Democrat & Republican Areas in Spring Valley Colony

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

Spring Valley Colony leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.

 

About 58% of adults in Spring Valley Colony typically vote, near the U.S. average of about 62%. Among adults in Spring Valley Colony, ~24% vote Democratic, ~33% Republican, and ~43% don't vote. The map below shows estimated turnout by block group.

How Spring Valley Colony compares

Among cities within 25 miles, Spring Valley Colony leans more Republican than 2 of 9 neighbors.

Spring Valley Colony runs about 12 points more Democratic than South Dakota as a whole.

Politics vary noticeably by neighborhood within Spring Valley Colony. The southwest side runs the most Democratic (Even) and the southeast side runs the most Republican (R+55), a spread of about 57 points.

Why Spring Valley Colony leans the way it does

This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Spring Valley Colony, not a ranked or complete list of what matters most.

Areas with low college attainment vote Republican. About 11% of adults in Spring Valley Colony hold a bachelor's degree, about 15 points below the South Dakota average of 26%.

Paved land cover and Republican lean

Places with little paved surface tend to lean Republican; Spring Valley Colony, 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 Spring Valley Colony looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Spring Valley Colony is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 32% of households in Spring Valley Colony rent, above 86% of cities. Learn more about the findings and methodology on the political spectrum map.

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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.