Madison County leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 70% of adults in Madison County typically vote, above the U.S. average of about 62%. Among adults in Madison County, ~30% vote Democratic, ~40% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How Madison County compares
Among counties within 50 miles, Madison County leans more Republican than 3 of 8 neighbors.
Madison County runs about 26 points more Republican than New York as a whole. New York leans Democratic overall, while Madison County is one of the few Republican-leaning pockets.
Politics vary noticeably by city within Madison County. The west side runs the most Democratic (D+6) and the south side runs the most Republican (R+33), a spread of about 39 points.
Why Madison County leans the way it does
This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Madison County, not a ranked or complete list of what matters most.
Madison County votes against the grain of New York. New York leans Democratic overall, while Madison County runs about 26 points more Republican.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Madison County, NY sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Madison County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Madison County 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 65%, above 76% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Oneida County, NY R+13
- Onondaga County, NY D+21
- Cortland County, NY R+17
- Chenango County, NY R+36
- Herkimer County, NY R+29
- Oswego County, NY R+23
- Cayuga County, NY R+17
- Otsego County, NY R+5
- Tompkins County, NY D+49
- Lewis County, NY R+48
Counties with Similar Populations
- Shiawassee County, MI R+27
- Allegany County, MD R+33
- McCracken County, KY R+30
- Catoosa County, GA R+54
- Lake County, CA R+4
- Otero County, NM R+19
- Carteret County, NC R+35
- Walker County, GA R+61
- Oldham County, KY R+23
- Laurens County, SC R+35
Sources and methodology
Precinct-level voting records used to fit the model come from New York State Board of 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.