Clarkson Valley leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 93% of adults in Clarkson Valley typically vote, above the U.S. average of about 62%. Among adults in Clarkson Valley, ~36% vote Democratic, ~57% Republican, and ~7% don't vote. The map below shows estimated turnout by block group.
How Clarkson Valley compares
Among cities within 25 miles, Clarkson Valley leans more Republican than 106 of 162 neighbors.
Politically, Clarkson Valley sits close to the rest of Missouri.
Politics vary noticeably by neighborhood within Clarkson Valley. The west side is the most Republican-leaning (R+34) and the northwest side is the least Republican-leaning (R+10), a spread of about 24 points.
Why Clarkson Valley leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Clarkson Valley, not a ranked or complete list of what matters most.
Clarkson Valley votes Republican even though it is densely developed (about 76%, far above the Missouri average of 22%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 88% of households in Clarkson Valley are family households, above 98% of cities.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Clarkson Valley, MO does.
Why turnout in Clarkson Valley looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Clarkson Valley is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 76%, about 16 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 96% of households in Clarkson Valley own their home, about 21 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and more than 99% of adults in Clarkson Valley have completed high school, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Chesterfield, MO D+5
- Ellisville, MO Even
- Wildwood, MO R+16
- Grover, MO R+10
- Ballwin, MO D+6
- Winchester, MO D+8
- Town and Country, MO R+3
- Manchester, MO D+10
- Weldon Spring, MO R+23
- Twin Oaks, MO D+11
Cities with Similar Populations
- Moravia, NY R+33
- Apalachicola, FL R+34
- Nanty-Glo, PA R+45
- Red Boiling Springs, TN R+67
- Cloverdale, VA R+31
- St. Ignace, MI R+9
- Wilson, WY D+12
- Lake Clarke Shores, FL R+12
- Camden, AL D+7
- Cresson, PA R+43
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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.