Champaign County is a Republican stronghold. About 25% of voters here vote Democratic and 75% Republican.
About 75% of adults in Champaign County typically vote, above the U.S. average of about 62%. Among adults in Champaign County, ~19% vote Democratic, ~56% Republican, and ~25% don't vote. The map below shows estimated turnout by block group.
How Champaign County compares
Among counties within 50 miles, Champaign County leans more Republican than 11 of 17 neighbors.
Champaign County runs about 39 points more Republican than Ohio as a whole.
Politics vary noticeably by city within Champaign County. The northwest side is the most Republican-leaning (R+61) and the south side is the least Republican-leaning (R+39), a spread of about 22 points.
Why Champaign 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 Champaign 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 Champaign County, about 92% of residents are non-Hispanic white, about 20 points above the U.S. average of 72%; about 19% of adults hold a bachelor's degree, about 10 points below the U.S. average of 28%.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Champaign County, OH sits in the bottom quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Champaign County looks the way it does
Turnout in Champaign County sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Clark County, OH R+21
- Logan County, OH R+51
- Union County, OH R+30
- Madison County, OH R+39
- Miami County, OH R+42
- Shelby County, OH R+58
- Greene County, OH R+17
- Montgomery County, OH D+6
- Hardin County, OH R+50
- Delaware County, OH R+5
Counties with Similar Populations
- Gloucester County, VA R+38
- Isle of Wight County, VA R+17
- Colleton County, SC R+17
- Warren County, PA R+41
- Jim Wells County, TX R+14
- Graham County, AZ R+39
- Des Moines County, IA R+8
- Finney County, KS R+25
- Woodford County, IL R+40
- Oconto County, WI R+40
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.