Winchester leans slightly Democratic by roughly 8 points: about 54% of voters vote Democratic and 46% Republican.
About 59% of adults in Winchester typically vote, near the U.S. average of about 62%. Among adults in Winchester, ~32% vote Democratic, ~27% Republican, and ~41% don't vote. The map below shows estimated turnout by block group.
How Winchester compares
Among cities within 25 miles, Winchester leans more Democratic than 89 of 169 neighbors.
Winchester runs about 26 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while Winchester is one of the few Democratic-leaning pockets.
Why Winchester 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 Winchester, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Winchester live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Winchester sits in the top quarter (about 34%, above 81% of cities). Winchester runs against the grain of Missouri, a Democratic-leaning pocket in a Republican-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Winchester, MO sits in the top tenth 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 Winchester looks the way it does
Crowded housing lines up with lower turnout. About 10% of homes in Winchester have more than one occupant per room, above 97% of cities. Strong routine healthcare access lines up with higher turnout, and Winchester sits in the top quarter on routine-care measures. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Ballwin, MO D+6
- Manchester, MO D+10
- Twin Oaks, MO D+11
- Valley Park, MO D+8
- Ellisville, MO Even
- Town and Country, MO R+3
- Des Peres, MO Even
- Chesterfield, MO D+5
- Clarkson Valley, MO R+22
- Grover, MO R+10
Cities with Similar Populations
- Nissequogue, NY R+20
- Pope, MS R+53
- Cowiche, WA R+25
- Mosier, OR R+4
- Quinnesec, MI R+32
- Addy, WA R+46
- Coloma, WI R+37
- Worthington Hills, KY D+31
- Mount Berry, GA R+34
- Searles Valley, CA R+46
All Local Stats
Home Services
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.