Indiana Political Map | Democrat & Republican Areas in Indiana

By the BestNeighborhood data science team. Last updated May 2026.

Indiana leans Republican by roughly 16 points: about 42% of voters vote Democratic and 58% Republican.

 

About 67% of adults in Indiana typically vote, near the U.S. average of about 62%. Among adults in Indiana, ~28% vote Democratic, ~39% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.

How Indiana compares

Among states within 500 miles, Indiana leans more Republican than 10 of 15 neighbors.

Politics vary noticeably by county within Indiana. The northwest side runs the most Democratic (Even) and the southeast side runs the most Republican (R+40), a spread of about 40 points.

Why Indiana leans the way it does

This analysis examined 14,881 data points per state to find what predicts political lean and turnout. The items below are a few correlations that stood out for Indiana, not a ranked or complete list of what matters most.

Areas with low college attainment vote Republican. About 29% of adults in Indiana hold a bachelor's degree, below 82% of states.

Walkability and Republican lean

Places with a low walkability score tend to lean Republican; Indiana sits below the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.

Why turnout in Indiana looks the way it does

Turnout in Indiana 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.

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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.