What to know about Indiana’s 2026 primary elections

Indiana voters head to the polls Tuesday for primaries that will determine nominees for all nine U.S. House seats and dozens of state legislative races. Intraparty fights, particularly among Republicans, will shape some of the most closely watched contests in the 2026 midterm elections.

Indiana’s primary is open, meaning voters do not have to be registered with a party to participate. However, if a voter selects a Republican ballot, they will only have access to GOP candidates and will not have a say in the Democratic primary.

The election will decide nominees for all nine U.S. House districts, all 100 Indiana House seats, and about half of the state Senate. 

Because many districts lean heavily Republican or Democratic, the primary often effectively determines the eventual officeholder. 

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