Franklin County leans Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 70% of adults in Franklin County typically vote, above the U.S. average of about 62%. Among adults in Franklin County, ~45% vote Democratic, ~24% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Franklin County compares
Among counties within 50 miles, Franklin County is the most Democratic-leaning.
Franklin County runs about 41 points more Democratic than Ohio as a whole. Ohio leans Republican overall, while Franklin County is one of the few Democratic-leaning pockets.
Politics vary noticeably by city within Franklin County. The southeast side is the most Democratic-leaning (D+41) and the southwest side is the least Democratic-leaning (Even), a spread of about 40 points.
Why Franklin 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 Franklin County, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 91% of residents in Franklin County live in densely developed areas, about 55 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Franklin County sits in the top quarter (about 42%, above 93% of counties). Franklin County runs against the grain of Ohio, a Democratic-leaning pocket in a Republican-leaning state.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Franklin County, OH 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 Franklin County looks the way it does
Turnout in Franklin County sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Delaware County, OH R+5
- Madison County, OH R+39
- Fairfield County, OH R+23
- Pickaway County, OH R+41
- Union County, OH R+30
- Licking County, OH R+29
- Morrow County, OH R+58
- Fayette County, OH R+55
- Knox County, OH R+48
- Marion County, OH R+35
Counties with Similar Populations
- Travis County, TX D+37
- Hennepin County, MN D+43
- Oakland County, MI D+14
- Cuyahoga County, OH D+35
- Nassau County, NY Even
- Allegheny County, PA D+22
- Orange County, FL D+14
- Suffolk County, NY R+8
- Hillsborough County, FL Even
- Salt Lake County, UT D+10
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.