Dearborn County is a Republican stronghold. About 24% of voters here vote Democratic and 76% Republican.
About 80% of adults in Dearborn County typically vote, above the U.S. average of about 62%. Among adults in Dearborn County, ~19% vote Democratic, ~61% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How Dearborn County compares
Among counties within 50 miles, Dearborn County leans more Republican than 10 of 25 neighbors.
Dearborn County runs about 34 points more Republican than Indiana as a whole.
Politics vary noticeably by city within Dearborn County. The northwest side is the most Republican-leaning (R+64) and the east side is the least Republican-leaning (R+39), a spread of about 25 points.
Why Dearborn 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 Dearborn County, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 71% of households in Dearborn County are family households, above 83% of counties.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Dearborn County, IN sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Dearborn County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Dearborn 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 63%, above 67% of counties. Homeowners vote more often than renters, and about 86% of households in Dearborn County own their home, above 97% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Ohio County, IN R+58
- Ripley County, IN R+59
- Boone County, KY R+28
- Franklin County, IN R+63
- Kenton County, KY R+14
- Hamilton County, OH D+21
- Switzerland County, IN R+63
- Gallatin County, KY R+57
- Campbell County, KY R+16
- Butler County, OH R+20
Counties with Similar Populations
- Columbus County, NC R+27
- Medina County, TX R+37
- Bristol County, RI D+17
- Somerset County, ME R+29
- Venango County, PA R+42
- Gibson County, TN R+44
- Cherokee County, TX R+47
- Henry County, VA R+31
- Lincoln County, OR D+13
- Bedford County, TN R+51
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Indiana 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.