St. Clair is a Republican stronghold. About 24% of voters here vote Democratic and 76% Republican.
About 69% of adults in St. Clair typically vote, above the U.S. average of about 62%. Among adults in St. Clair, ~17% vote Democratic, ~52% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How St. Clair compares
Among cities within 25 miles, St. Clair leans more Republican than 24 of 72 neighbors.
St. Clair runs about 34 points more Republican than Missouri as a whole.
Why St. Clair 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 St. Clair, not a ranked or complete list of what matters most.
St. Clair votes Republican even though it is densely developed (about 22%, about 14 points below the U.S. average of 36%). State and regional patterns outweigh the Democratic lean that density usually predicts here. Low college attainment predicts Republican voting, and St. Clair sits in the bottom quarter (about 15%, below 79% of cities).
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; St. Clair, MO 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 St. Clair looks the way it does
Turnout in St. Clair sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Parkway, MO R+44
- Piney Park, MO R+61
- Mount Hope, MO R+60
- Neier, MO R+63
- Union, MO R+44
- Miramiguoa Park, MO R+57
- Lonedell, MO R+62
- Stanton, MO R+58
- Robertsville, MO R+52
- Villa Ridge, MO R+49
Cities with Similar Populations
- Cushing, OK R+47
- Georgetown, IN R+41
- Eastman, GA R+28
- Cynthiana, KY R+45
- Senatobia, MS R+14
- Livingston, MT R+6
- Shady Hills, FL R+48
- Little Canada, MN D+35
- Victoria, MN R+5
- Sylvester, GA R+29
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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.