Manchester leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 84% of adults in Manchester typically vote, above the U.S. average of about 62%. Among adults in Manchester, ~46% vote Democratic, ~38% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How Manchester compares
Among cities within 25 miles, Manchester leans more Democratic than 90 of 167 neighbors.
Manchester runs about 29 points more Democratic than Missouri as a whole. Missouri leans Republican overall, while Manchester is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within Manchester. The east side is the most Democratic-leaning (D+16) and the west side is the least Democratic-leaning (D+6), a spread of about 10 points.
Why Manchester 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 Manchester, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 97% of residents in Manchester live in densely developed areas, about 60 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Manchester sits in the top quarter (about 62%, above 97% of cities). Manchester runs against the grain of Missouri, a Democratic-leaning pocket in a Republican-leaning state.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Manchester, MO sits in the top tenth nationally on this measure.
Why turnout in Manchester looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Manchester 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 71%, about 11 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 98% of adults in Manchester have completed high school, above 93% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Twin Oaks, MO D+11
- Winchester, MO D+8
- Valley Park, MO D+8
- Ballwin, MO D+6
- Des Peres, MO Even
- Town and Country, MO R+3
- Ellisville, MO Even
- Kirkwood, MO D+20
- Crystal Lake Park, MO R+6
- Chesterfield, MO D+5
Cities with Similar Populations
- Phelan, CA R+39
- Ammon, ID R+48
- Andrews, TX R+62
- Angier, NC R+29
- Pinewood, FL D+58
- Knik-Fairview, AK R+40
- Murphy, NC R+50
- Benton Harbor, MI D+42
- Greenfield, MA D+26
- Belle Glade, FL D+41
All Local Stats
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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.