There are 100 incumbents running for re-election in the primaries for Iowa's state Legislature on June 2. Fifteen of those incumbents (15%) are contested, the most since 2012, when there were 16. There are a total of 125 seats up for election this year, including all 100 seats in the state House and 25 seats in the state Senate.
There are 244 candidates – 121 Democrats and 123 Republicans – running this year. An average of 240 candidates ran in even years between 2010 and 2024.
