Clark County leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 67% of adults in Clark County typically vote, near the U.S. average of about 62%. Among adults in Clark County, ~26% vote Democratic, ~41% Republican, and ~33% 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 4 of 24 neighbors.
Politically, Clark County sits close to the rest of Indiana.
Politics vary noticeably by city within Clark County. The south side runs the most Democratic (Even) and the north side runs the most Republican (R+51), a spread of about 51 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.
Clark County votes Republican even though it is densely developed (about 64%, far above the Indiana average of 25%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Clark County, IN sits in the top quarter 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 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
- Floyd County, IN R+18
- Jefferson County, KY D+20
- Oldham County, KY R+23
- Harrison County, IN R+50
- Scott County, IN R+53
- Washington County, IN R+57
- Bullitt County, KY R+48
- Trimble County, KY R+57
- Shelby County, KY R+32
- Spencer County, KY R+56
Counties with Similar Populations
- Comanche County, OK R+18
- La Crosse County, WI D+8
- San Juan County, NM R+26
- Allegan County, MI R+28
- Berkeley County, WV R+33
- Tom Green County, TX R+39
- Jasper County, MO R+40
- Blair County, PA R+37
- Fayette County, GA R+4
- Carroll County, GA R+35
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Sources and methodology
Precinct-level voting records used to fit the model come from Indiana 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.