Mandeville is a Republican stronghold. About 14% of voters here vote Democratic and 86% Republican.
About 73% of adults in Mandeville typically vote, above the U.S. average of about 62%. Among adults in Mandeville, ~10% vote Democratic, ~63% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How Mandeville compares
Among cities within 25 miles, Mandeville leans more Republican than 36 of 38 neighbors.
Mandeville runs about 53 points more Republican than Missouri as a whole.
Why Mandeville 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 Mandeville, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. Mandeville sits in the bottom quarter on density and about 98% of residents are non-Hispanic white, about 11 points above the Missouri average of 87%.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Mandeville, MO sits in the bottom tenth 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 Mandeville looks the way it does
Areas with high high-school completion turn out at higher rates. About 97% of adults in Mandeville have completed high school, about 7 points above the Missouri average of 89%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Coloma, MO R+71
- Roads, MO R+71
- Bogard, MO R+71
- Plymouth, MO R+71
- Tina, MO R+67
- Stet, MO R+65
- Dawn, MO R+70
- Regal, MO R+63
- Braymer, MO R+57
- Ludlow, MO R+69
Cities with Similar Populations
- Verona, CA R+42
- Dodson, TX R+84
- Ash Hill, NC R+67
- Old Bland, MO R+65
- Namekagon, WI R+10
- Pistol River, OR R+15
- Canton, WV R+72
- Blairs Mill, KY R+59
- Denning, NY D+3
- West Princeton, ME R+37
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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.