Sheridan County is a Republican stronghold. About 16% of voters here vote Democratic and 84% Republican.
About 62% of adults in Sheridan County typically vote, near the U.S. average of about 62%. Among adults in Sheridan County, ~10% vote Democratic, ~52% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How Sheridan County compares
Among counties within 50 miles, Sheridan County is the most Republican-leaning.
Sheridan County runs about 32 points more Republican than North Dakota as a whole.
Why Sheridan 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 Sheridan County, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In Sheridan County, about 96% of residents are non-Hispanic white, about 24 points above the U.S. average of 72%; about 19% of adults hold a bachelor's degree, about 8 points below the North Dakota average of 26%.
Developed land and Republican lean
Places with a rural land-use pattern tend to lean Republican; Sheridan County, ND sits in the bottom tenth nationally on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Sheridan County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Sheridan 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 65%, about 5 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Wells County, ND R+58
- McLean County, ND R+51
- McHenry County, ND R+61
- Kidder County, ND R+61
- Pierce County, ND R+47
- Oliver County, ND R+67
- Burleigh County, ND R+32
- Eddy County, ND R+46
- Morton County, ND R+49
- Foster County, ND R+50
Counties with Similar Populations
- Rock County, NE R+74
- Hyde County, SD R+60
- Greeley County, KS R+68
- Stonewall County, TX R+68
- Skagway Municipality, AK R+23
- Harding County, SD R+88
- Alpine County, CA D+36
- Issaquena County, MS R+11
- Garfield County, MT R+87
- Sterling County, TX R+80
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.