The increase was most pronounced in the state's most populous counties, where turnout rose by several percentage points compared with four years ago. In Marion County, turnout climbed 7 percentage points to 41%, with 261,823 voters casting ballots—more than any other county in the state. Hamilton County recorded the second-highest turnout at 52%, up 4 points from 2022, with 150,804 voters. Lake County saw turnout rise 3 points to 40%, with 146,971 voters. Allen and St. Joseph counties each posted increases of 2 and 3 points, respectively.

Statewide turnout was up even though the Indiana Election Division has not yet finished populating results for all counties, and more than a dozen counties still have incomplete data.

The higher participation helped Democrats secure their first statewide win since 2012, with Beau Bayh elected secretary of state. Hamilton and Allen counties were among 14 counties that flipped from red to blue this election, contributing to Bayh's victory and other down-ballot gains.

The national picture mirrored Indiana's trend. Turnout across the country was the second-highest for a midterm election since 1914, only slightly behind the 2018 midterms, according to preliminary data from the University of Florida Election Lab. Early voting contributed to the strong showing.

Indiana's turnout increase came without a high-profile Senate race like those that drove record participation in states such as Michigan, Maine and Minnesota. Even so, Hoosier voters were motivated to show up, a sign that local and state contests drew heightened interest.

The final tallies are still being certified, but the early numbers suggest that expanded access to the ballot and strong civic engagement in urban and suburban counties played a decisive role in reshaping Indiana's political landscape.