Fairfield County leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.
About 80% of adults in Fairfield County typically vote, above the U.S. average of about 62%. Among adults in Fairfield County, ~31% vote Democratic, ~50% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How Fairfield County compares
Among counties within 50 miles, Fairfield County leans more Republican than 3 of 15 neighbors.
Fairfield County runs about 12 points more Republican than Ohio as a whole.
Politics vary noticeably by city within Fairfield County. The northwest side runs the most Democratic (D+5) and the southwest side runs the most Republican (R+59), a spread of about 64 points.
Why Fairfield 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 Fairfield County, not a ranked or complete list of what matters most.
Fairfield County votes Republican even though it is densely developed (about 52%, well above the Ohio average of 34%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 74% of households in Fairfield County are family households, above 93% of counties.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; Fairfield County, OH sits in the top quarter nationally on this measure.
Why turnout in Fairfield County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Fairfield 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%, about 5 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 94% of adults in Fairfield County have completed high school, above 86% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Licking County, OH R+29
- Pickaway County, OH R+41
- Franklin County, OH D+30
- Hocking County, OH R+51
- Perry County, OH R+56
- Delaware County, OH R+5
- Ross County, OH R+44
- Muskingum County, OH R+41
- Madison County, OH R+39
- Vinton County, OH R+58
Counties with Similar Populations
- Martin County, FL R+25
- Alexandria City, VA D+55
- Stearns County, MN R+21
- Centre County, PA D+8
- Sullivan County, TN R+50
- Schenectady County, NY D+17
- Indian River County, FL R+21
- Jackson County, MI R+14
- Ouachita Parish, LA R+13
- St. Clair County, MI R+31
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.