Brandon leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.
About 90% of adults in Brandon typically vote, above the U.S. average of about 62%. Among adults in Brandon, ~32% vote Democratic, ~58% Republican, and ~10% don't vote. The map below shows estimated turnout by block group.
How Brandon compares
Among cities within 25 miles, Brandon leans more Republican than 1 of 38 neighbors.
Politically, Brandon sits close to the rest of South Dakota.
Politics vary noticeably by neighborhood within Brandon. The southeast side is the most Republican-leaning (R+43) and the north side is the least Republican-leaning (R+21), a spread of about 22 points.
Why Brandon 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 Brandon, not a ranked or complete list of what matters most.
Brandon votes Republican even though it is densely developed (about 50%, far above the South Dakota average of 9%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; Brandon, SD sits in the top tenth nationally on this measure.
Why turnout in Brandon looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Brandon 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 74%, about 14 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Brandon have completed high school, above 92% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Corson, SD R+49
- Valley Springs, SD R+49
- Rowena, SD R+47
- Renner Corner, SD R+42
- Sioux Falls, SD R+5
- Renner, SD R+47
- Garretson, SD R+50
- Beaver Creek, MN R+62
- Larchwood, IA R+64
Cities with Similar Populations
- Guttenberg, NJ D+20
- Lansdowne, VA D+23
- Damascus, OR R+6
- Clay, AL R+5
- Highland City, FL R+29
- Newport East, RI D+15
- Falmouth, ME D+31
- Woodmere, NY R+56
- Stevensville, MD R+23
- Herrin, IL R+35
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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.