Darke County is a Republican stronghold. About 20% of voters here vote Democratic and 80% Republican.
About 73% of adults in Darke County typically vote, above the U.S. average of about 62%. Among adults in Darke County, ~15% vote Democratic, ~59% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Darke County compares
Among counties within 50 miles, Darke County leans more Republican than 19 of 20 neighbors.
Darke County runs about 50 points more Republican than Ohio as a whole.
Politics vary noticeably by city within Darke County. The north side is the most Republican-leaning (R+73) and the west side is the least Republican-leaning (R+59), a spread of about 13 points.
Why Darke 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 Darke 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 Darke County, about 95% of residents are non-Hispanic white, about 22 points above the U.S. average of 72%; about 16% of adults hold a bachelor's degree, about 7 points below the Ohio average of 23%.
Housing overcrowding and voter turnout
Places with low overcrowding tend to turn out at a higher rate; Darke County, OH sits in the bottom quarter nationally on this measure.
Why turnout in Darke County looks the way it does
Turnout in Darke County sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Miami County, OH R+42
- Randolph County, IN R+55
- Preble County, OH R+58
- Shelby County, OH R+58
- Wayne County, IN R+31
- Mercer County, OH R+65
- Jay County, IN R+58
- Montgomery County, OH D+6
- Auglaize County, OH R+59
- Union County, IN R+58
Counties with Similar Populations
- Grant County, WI R+23
- Harrisonburg City, VA D+18
- Waupaca County, WI R+34
- Oktibbeha County, MS D+3
- Ogle County, IL R+28
- St. Martin Parish, LA R+35
- Hoke County, NC D+7
- Nye County, NV R+41
- Cass County, MI R+29
- Rusk County, TX R+53
Sources and methodology
Precinct-level voting records used to fit the model come from Ohio 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.