© 2025. The Trustees of Indiana University
Copyright Complaints
1229 East Seventh Street, Bloomington, Indiana 47405
News, Arts and Culture from WFIU Public Radio and WTIU Public Television
Play Live Radio
Next Up:
0:00
0:00
0:00 0:00
Available On Air Stations
Some web content from Indiana Public Media is unavailable during our transition to a new web publishing platform. We apologize for the inconvenience.

How does party affiliation affect Indiana's primary elections?

Indiana does not register people by political party, meaning it has what are called open primaries — any voter can take a Republican or Democratic ballot in the primary.
Indiana does not register people by political party, meaning it has what are called open primaries — any voter can take a Republican or Democratic ballot in the primary.

Can a registered Democrat vote Republican in Indiana’s primary? Can someone vote in both party primaries, for different offices?

Those are questions from listeners that came in after a political centrist  group put up billboards encouraging Democrats to vote in the Republican primary this year.

Indiana is one of about two dozen states that does not register people by political party. There are no registered Democrats, Republicans or anything else.

That means Indiana has what are called open primaries — any registered voter can choose a Democratic or Republican ballot.  State law does say that primary voters must have voted in the last general election for “a majority of the regular nominees of the political party” whose ballot they chose, or intend to do so in the next general election. But there’s no way to check that, making it virtually impossible to enforce.

READ MORE: Indiana’s 2024 primary is May 7. What do I need on Election Day?

Join the conversation and sign up for the Indiana Two-Way. Text "Indiana" to 765-275-1120. Your comments and questions in response to our weekly text help us find the answers you need on statewide issues and the election, including our project  Civically, Indiana .

You can’t vote for different parties in the same primary election — if you choose a Republican ballot, you’ll only have access to GOP candidates, and the same for Democrats.

There is a nonpartisan option in Indiana primaries. If there are any public questions on the primary ballot,  like school referendums, you can choose to only vote on those.

Brandon is our Statehouse bureau chief. Contact him at  bsmith@ipbs.org  or follow him on Twitter at  @brandonjsmith5 .

Brandon J. Smith has previously worked as a reporter and anchor for KBIA Radio in Columbia, MO. Prior to that, he worked for WSPY Radio in Plano, IL as a show host, reporter, producer and anchor. His first job in radio was in another state capitol, in Jefferson City, as a reporter for three radio stations around Missouri. Brandon graduated from the University of Missouri-Columbia with a Bachelor of Journalism in 2010, with minors in political science and history. He was born and raised in Chicago.