Clark County is a Republican stronghold. About 20% of voters here vote Democratic and 80% Republican.
About 81% of adults in Clark County typically vote, above the U.S. average of about 62%. Among adults in Clark County, ~16% vote Democratic, ~65% Republican, and ~19% 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 12 of 16 neighbors.
Clark County runs about 41 points more Republican than Missouri as a whole.
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 a high white share and below-average college attainment vote Republican. In Clark County, about 95% of residents are non-Hispanic white, about 23 points above the U.S. average of 72%; about 15% of adults hold a bachelor's degree, about 7 points below the Missouri average of 22%.
Never-married share, developed land, and voter turnout
Places that combine a low never-married share and a rural land-use pattern tend to turn out at a higher rate, as Clark County, MO does.
Why turnout in Clark County looks the way it does
Turnout in Clark County sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Lee County, IA R+27
- Lewis County, MO R+59
- Scotland County, MO R+64
- Van Buren County, IA R+55
- Hancock County, IL R+45
- Knox County, MO R+66
- Adams County, IL R+40
- Henry County, IA R+31
- Des Moines County, IA R+8
- Schuyler County, MO R+67
Counties with Similar Populations
- Buena Vista City, VA R+35
- Pershing County, NV R+52
- King and Queen County, VA R+28
- Hancock County, TN R+77
- Fremont County, IA R+47
- La Salle County, TX R+13
- Childress County, TX R+57
- Kearney County, NE R+59
- Russell County, KS R+59
- Wolfe County, KY R+57
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Sources and methodology
Precinct-level voting records used to fit the model come from Missouri 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.