Slope County is a Republican stronghold. About 13% of voters here vote Democratic and 87% Republican.
About 65% of adults in Slope County typically vote, near the U.S. average of about 62%. Among adults in Slope County, ~9% vote Democratic, ~56% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How Slope County compares
Among counties within 50 miles, Slope County is the most Republican-leaning.
Slope County runs about 37 points more Republican than North Dakota as a whole.
Why Slope County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Slope County, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. Slope County sits in the bottom quarter on density and about 92% of residents are non-Hispanic white, about 6 points above the North Dakota average of 87%.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Slope County, ND 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 Slope County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Slope County 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 64%, above 74% of counties. Homeowners vote more often than renters, and about 81% of households in Slope County own their home, above 82% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Bowman County, ND R+65
- Hettinger County, ND R+69
- Billings County, ND R+67
- Golden Valley County, ND R+69
- Fallon County, MT R+71
- Stark County, ND R+53
- Adams County, ND R+62
- Wibaux County, MT R+75
- Harding County, SD R+88
- Perkins County, SD R+68
Counties with Similar Populations
- San Juan County, CO D+29
- Hooker County, NE R+79
- Logan County, NE R+83
- Esmeralda County, NV R+61
- Banner County, NE R+79
- Thomas County, NE R+76
- Yakutat City and Borough, AK Even
- Kent County, TX R+79
- Harding County, NM R+37
- Terrell County, TX R+65
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from North 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.