Ortley leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 61% of adults in Ortley typically vote, near the U.S. average of about 62%. Among adults in Ortley, ~18% vote Democratic, ~43% Republican, and ~39% don't vote. The map below shows estimated turnout by block group.
How Ortley compares
Among cities within 25 miles, Ortley leans more Republican than 5 of 20 neighbors.
Ortley runs about 10 points more Republican than South Dakota as a whole.
Politics vary noticeably by neighborhood within Ortley. The south side is the most Republican-leaning (R+52) and the northwest side is the least Republican-leaning (R+29), a spread of about 23 points.
Why Ortley leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Ortley. The lean here lands roughly where demographic data alone would predict.
Population density, never-married share, and Republican lean
Places that combine low population density and a never-married-heavy adult population tend to lean Republican, as Ortley, SD does.
Why turnout in Ortley looks the way it does
Turnout in Ortley sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Waubay, SD R+38
- Summit, SD R+40
- Grenville, SD R+31
- Marvin, SD R+58
- Webster, SD R+46
- Peever, SD R+11
- South Shore, SD R+54
- Wilmot, SD R+51
- Wallace, SD R+55
- Roslyn, SD R+44
Cities with Similar Populations
- Vicksburg, AZ R+54
- Ordway, SD R+56
- Charlton Heights, WV R+47
- Peckham, CO R+57
- Federal Dam, MN R+29
- Diehlstadt, MO R+65
- Shacklett, TN R+58
- Macksburg, IA R+52
- Hansford, WV R+47
- Anawalt, WV R+58
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.