Madison County leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 72% of adults in Madison County typically vote, above the U.S. average of about 62%. Among adults in Madison County, ~34% vote Democratic, ~38% Republican, and ~28% don't vote. The map below shows estimated turnout by block group.
How Madison County compares
Among counties within 50 miles, Madison County is the least Republican-leaning.
Madison County runs about 25 points more Democratic than Alabama as a whole.
Politics vary noticeably by city within Madison County. The north side runs the most Democratic (D+32) and the northeast side runs the most Republican (R+39), a spread of about 71 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 Republican even though it is densely developed (about 63%, far above the Alabama average of 19%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Madison County, AL sits in the top quarter nationally on this measure.
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 62%, above 62% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Limestone County, AL R+45
- Morgan County, AL R+43
- Lincoln County, TN R+64
- Marshall County, AL R+64
- Jackson County, AL R+71
- Giles County, TN R+57
- Lawrence County, AL R+63
- Moore County, TN R+69
- Cullman County, AL R+76
- Franklin County, TN R+59
Counties with Similar Populations
- Osceola County, FL Even
- Mercer County, NJ D+38
- Butler County, OH R+20
- Allen County, IN R+5
- Orleans Parish, LA D+63
- Lake County, FL R+25
- Lane County, OR D+21
- Forsyth County, NC D+18
- Pulaski County, AR D+28
- Manatee County, FL R+15
Sources and methodology
Precinct-level voting records used to fit the model come from Alabama 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.