Indiana's May 6 primary elections drew only 13 percent of registered voters to the polls.
Secretary of State Connie Lawson announced the turnout Tuesday, saying only 617,000 of Indiana's 4.5 million registered voters cast a vote in the primaries.
There were no key statewide races or issues to pique interest among voters.
The turnout figures show polls attracted fewer than 6 percent of voters in Vanderburgh County, where Evansville is located.
Lawson says she believes turnout was higher than the numbers indicate because lists of registered voters might be outdated.
Lawson says 16 percent of voters cast early ballots, compared with 12 percent in 2012 and 11 percent in 2010.