Clark County leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 65% of adults in Clark County typically vote, near the U.S. average of about 62%. Among adults in Clark County, ~19% vote Democratic, ~46% Republican, and ~35% don't vote. The map below shows estimated turnout by block group.
How Clark County compares
Among counties within 50 miles, Clark County leans more Republican than 5 of 6 neighbors.
Clark County runs about 42 points more Republican than Wisconsin as a whole.
Politics vary noticeably by city within Clark County. The east side is the most Republican-leaning (R+51) and the south side is the least Republican-leaning (R+35), a spread of about 16 points.
Why Clark 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 Clark County, not a ranked or complete list of what matters most.
Areas with low college attainment vote Republican. About 13% of adults in Clark County hold a bachelor's degree, about 14 points below the Wisconsin average of 26%. A high family-household share predicts Republican voting, and about 69% of households in Clark County are family households, above 75% of counties.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Clark County, WI 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 Clark County looks the way it does
Turnout in Clark County sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Taylor County, WI R+46
- Wood County, WI R+22
- Jackson County, WI R+21
- Chippewa County, WI R+24
- Marathon County, WI R+17
- Eau Claire County, WI D+10
- Trempealeau County, WI R+26
- Rusk County, WI R+38
- Portage County, WI R+7
- Lincoln County, WI R+29
Counties with Similar Populations
- Harris County, GA R+45
- Effingham County, IL R+56
- Lincoln County, NE R+46
- Alcorn County, MS R+59
- Cowley County, KS R+38
- Chambers County, AL R+13
- Barry County, MO R+62
- Wasatch County, UT R+33
- Taos County, NM D+42
- Howard County, TX R+50
Sources and methodology
Precinct-level voting records used to fit the model come from Wisconsin Elections Commission, 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.