Madeira leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 99% of adults in Madeira typically vote, above the U.S. average of about 62%. Among adults in Madeira, ~54% vote Democratic, ~45% Republican, and ~1% don't vote. The map below shows estimated turnout by block group.
How Madeira compares
Among cities within 25 miles, Madeira leans more Democratic than 135 of 154 neighbors.
Madeira runs about 22 points more Democratic than Ohio as a whole. Ohio leans Republican overall, while Madeira is one of the few Democratic-leaning pockets.
Politics vary noticeably by neighborhood within Madeira. The west side runs the most Democratic (D+17) and the southeast side runs the most Republican (Even), a spread of about 19 points.
Why Madeira 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 Madeira, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 71% of adults in Madeira hold a bachelor's degree, about 42 points above the U.S. average of 28%. Dense areas vote Democratic, and Madeira sits in the top fifth on density (about 93%, above 97% of cities). Madeira runs against the grain of Ohio, a Democratic-leaning pocket in a Republican-leaning state.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Madeira, OH sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Madeira looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Madeira 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%. High high-school completion lines up with higher turnout, and about 98% of adults in Madeira have completed high school, above 95% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Indian Hill, OH R+6
- Concorde Hills, OH R+12
- Silverton, OH D+51
- Deer Park, OH D+8
- Mariemont, OH D+27
- Amberley, OH D+20
- Blue Ash, OH D+10
- Terrace Park, OH D+12
- Remington, OH D+5
- Miamiville, OH R+20
Cities with Similar Populations
- Mount Horeb, WI D+16
- Bealeton, VA R+28
- Chanute, KS R+40
- White River Junction, VT D+21
- Sparta, NJ R+18
- Marlton, MD D+79
- Edinboro, PA Even
- Orient, OH R+26
- Dunbar, WV D+3
- Flossmoor, IL D+72
All Local Stats
Home Services
Sources and methodology
Precinct-level voting records used to fit the model come from Ohio 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.