Sunnyview, SD Political Map | Democrat & Republican Areas in Sunnyview

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

Sunnyview leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.

 

About 78% of adults in Sunnyview typically vote, above the U.S. average of about 62%. Among adults in Sunnyview, ~25% vote Democratic, ~53% Republican, and ~22% don't vote. The map below shows estimated turnout by block group.

How Sunnyview compares

Among cities within 25 miles, Sunnyview leans more Republican than 4 of 27 neighbors.

Sunnyview runs about 6 points more Republican than South Dakota as a whole.

Politics vary noticeably by neighborhood within Sunnyview. The southwest side is the most Republican-leaning (R+54) and the northeast side is the least Republican-leaning (R+21), a spread of about 33 points.

Why Sunnyview 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 Sunnyview, not a ranked or complete list of what matters most.

Sunnyview votes Republican even though it is densely developed (about 22%, modestly above the South Dakota average of 9%). State and regional patterns outweigh the Democratic lean that density usually predicts here.

Cancer-screening access and voter turnout

Places with high colon-cancer-screening access tend to turn out at a higher rate; Sunnyview, SD sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.

Why turnout in Sunnyview looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Sunnyview 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 72%, about 12 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and more than 99% of adults in Sunnyview have completed high school, in the top fraction 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.