Onaka is a Republican stronghold. About 16% of voters here vote Democratic and 84% Republican.
About 60% of adults in Onaka typically vote, near the U.S. average of about 62%. Among adults in Onaka, ~9% vote Democratic, ~51% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How Onaka compares
Among cities within 25 miles, Onaka leans more Republican than 6 of 15 neighbors.
Onaka runs about 38 points more Republican than South Dakota as a whole.
Why Onaka leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Onaka. The lean here lands roughly where demographic data alone would predict.
Population density and Republican lean
Places with low population density tend to lean Republican; Onaka, SD sits in the bottom tenth nationally on this measure.
Why turnout in Onaka looks the way it does
Turnout in Onaka sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Logan, SD R+70
- Tolstoy, SD R+69
- Loyalton, SD R+65
- Norbeck, SD R+69
- Hoven, SD R+72
- Seneca, SD R+68
- Roscoe, SD R+64
- Bowdle, SD R+62
- Faulkton, SD R+65
Cities with Similar Populations
- Awin, AL D+24
- Nowlin, SD R+73
- Tamworth, VA R+39
- Helena Crossing, AR D+16
- West Almond, NY R+28
- Memphis, AL D+9
- Berlin, AR R+86
All Local Stats
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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.