Brown County leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 74% of adults in Brown County typically vote, above the U.S. average of about 62%. Among adults in Brown County, ~21% vote Democratic, ~53% Republican, and ~26% don't vote. The map below shows estimated turnout by block group.
How Brown County compares
Among counties within 50 miles, Brown County leans more Republican than 6 of 19 neighbors.
Brown County runs about 24 points more Republican than Indiana as a whole.
Politics vary noticeably by city within Brown County. The north side is the most Republican-leaning (R+50) and the southwest side is the least Republican-leaning (R+36), a spread of about 14 points.
Why Brown 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 Brown County, not a ranked or complete list of what matters most.
Rural areas with a high white share vote Republican. Brown County sits in the bottom quarter on density and about 94% of residents are non-Hispanic white, about 5 points above the Indiana average of 88%. A high family-household share predicts Republican voting, and about 73% of households in Brown County are family households, above 91% of counties.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Brown County, IN sits in the bottom 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 Brown County looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Brown 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 64%, above 74% of counties. Homeowners vote more often than renters, and about 87% of households in Brown County own their home, above 98% of counties. High high-school completion lines up with higher turnout, and about 94% of adults in Brown County have completed high school, above 86% of counties. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Bartholomew County, IN R+30
- Monroe County, IN D+29
- Morgan County, IN R+51
- Johnson County, IN R+35
- Jackson County, IN R+51
- Shelby County, IN R+47
- Lawrence County, IN R+51
- Owen County, IN R+57
- Jennings County, IN R+56
- Marion County, IN D+29
Counties with Similar Populations
- Floyd County, VA R+47
- Moniteau County, MO R+60
- Barbour County, WV R+60
- Clark County, IL R+53
- Vermillion County, IN R+50
- De Witt County, IL R+43
- Williamsburg City, VA D+43
- Redwood County, MN R+47
- Pawnee County, OK R+59
- Washington County, AL R+46
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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.