The 2026 Iowa Senate election will determine the balance of power in the chamber.
In short: Following a series of special elections that broke the Republican supermajority, the 2026 Iowa Senate race is set to decide the future of the state legislature. With 25 seats up for election on November 3, 2026, both parties are navigating retirements, health challenges, and strategic shifts in candidate recruitment.
The Iowa Senate currently operates with a 33–17 Republican majority. This balance shifted significantly during the 2025 legislative cycle. Republicans had previously expanded their presence to 35 seats in the 2024 election, marking their largest majority since 1970. However, the resignation of Chris Cournoyer and the subsequent death of Rocky De Witt led to two special elections, both won by Democrats. These results, secured by Mike Zimmer and Catelin Drey respectively, effectively ended the Republican supermajority that had been in place since 2022.
As the 2026 election approaches, several incumbents are stepping away from their seats. Notable departures include Izaah Knox, who is running for Polk County supervisor, and Zach Wahls, who is pursuing a U.S. Senate bid. Others, such as Julian Garrett and Ken Rozenboom, have announced they will not seek re-election. The political landscape is further complicated by individual candidate decisions; for instance, Mike Bousselot initially explored a gubernatorial run before deciding to seek a different Senate seat, only to later end his campaign entirely in August 2026, leading to the selection of Wes Eros as a replacement.
The electoral map features a diverse range of districts, from urban centers like Des Moines, Sioux City, and Waterloo to rural counties. Incumbents have faced varying levels of competition in previous cycles, with some securing seats with overwhelming margins—such as Lynn Evans in the 3rd district with 99.1% of the vote in 2022—while others, like Mike Bousselot, won with 50.9% in the 21st district. These contests highlight the shifting priorities of Iowa voters as the state prepares for the November 3, 2026, vote.
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- Summary by Intellect · source: 2026 Iowa Senate election
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