The Iowa Senate reconvened on January 12 with a different look: a new majority leader (Mike Klimesh) and a changed balance of power: 33 Republicans and seventeen Democrats, down from a 34-16 GOP majority for most of the 2025 session.

Seven senators (four Republicans, three Democrats) were elected to the chamber for the first time in 2024, and three more won their seats in special elections during 2025.

Fourteen senators are women (eight Democrats and six Republicans)—that’s one more woman than last year, since Democrat Catelin Drey won the race to succeed the late Rocky De Witt in Senate district 1, and Renee Hardman won the race to succeed the late Claire Celsi in Senate district 16. The high point for women’s representation in the Iowa Senate was in 2023 and 2024, when the chamber had 35 men and fifteen women.

Hardman is the first Black woman to serve in the Iowa Senate and only the third African American ever elected to the chamber. Democrat Izaah Knox is also Black. The other 48 senators are white. No Latino has ever served in the chamber, and Iowa’s only Asian-American senator was Swati Dandekar, who resigned in 2011.

In 2023, Democrat Janice Weiner became the first Jewish person to serve in the Iowa Senate since Ralph Rosenberg left the legislature after 1994. She became the first Jewish person to lead an Iowa legislative caucus when her peers elected her minority leader in November 2024.

Democrat Liz Bennett is the only out LGBTQ member of the Iowa Senate.

I enclose below details on the majority and minority leadership teams, along with all chairs, vice chairs, and members of Iowa Senate committees. Where relevant, I’ve mentioned changes since last year’s legislative session. Although there hasn’t been as much turnover as the Iowa House saw during the interim, Klimesh did make quite a few changes in the committees compared to last year. He took all committee assignments away from one Republican (Doug Campbell) and took certain positions away from Kevin Alons, Mark Lofgren, Sandy Salmon, and Dave Sires.

Some non-political trivia: the 50 Iowa senators include four men named Mike (three Republicans and a Democrat), two Toms (a Democrat and a Republican), a Dave and a David (both Republicans), and two men each named Jeff, Mark, and Dan (all Republicans).

The Iowa Senate convened in Des Moines on January 8 for the first day of the 2024 legislative session. Although the balance of power remains the same (34 Republicans, sixteen Democrats), I’m publishing a new version of this post to note changes in leadership or among the chairs, vice chairs, and members of standing Senate committees.

Fourteen senators (nine Republicans, five Democrats) were elected to the chamber for the first time in 2022. Seven of them (four Republicans and three Democrats) previously served in the Iowa House.

Fifteen senators are women (eight Democrats and seven Republicans), up from twelve women in the chamber prior to the 2022 election and more than double the six women senators who served prior to the 2018 election.

Democrat Izaah Knox is the second Black state senator in Iowa history. The first was Tom Mann, a Democrat elected to two terms during the 1980s. The other 49 senators are white. No Latino has ever served in the chamber, and Iowa’s only Asian-American senator was Swati Dandekar, who resigned in 2011.

Democrat Janice Weiner became the first Jewish person to serve in the Iowa Senate since Ralph Rosenberg left the legislature after 1994. Democrat Liz Bennett became the first out LGBTQ state senator since Matt McCoy retired in 2018.

The Iowa Senate began its 2023 session on January 9 with 34 Republicans and sixteen Democrats, the largest majority seen in the chamber for about five decades. Five of the last seven Iowa general elections have been Republican waves.

Fourteen senators (nine Republicans, five Democrats) were just elected to the chamber for the first time in November. Seven of them (four Republicans and three Democrats) previously served in the Iowa House.

Fifteen senators are women (eight Democrats and seven Republicans), up from twelve women in the chamber prior to the 2022 election and more than double the six women senators who served prior to the 2018 election.

Democrat Izaah Knox is the second Black state senator in Iowa history. The first was Tom Mann, a Democrat elected to two terms during the 1980s. The other 49 senators are white. No Latino has ever served in the chamber, and Iowa’s only Asian-American senator was Swati Dandekar, who resigned in 2011.

Democrat Janice Weiner became the first Jewish person to serve in the Iowa Senate since Ralph Rosenberg left the legislature after 1994. Democrat Liz Bennett became the first out LGBTQ state senator since Matt McCoy retired in 2018.

I enclose below details on the majority and minority leadership teams, along with all chairs, vice chairs, and members of standing Iowa Senate committees. Where relevant, I’ve mentioned changes since last year’s legislative session. The Senate has added a new Technology Committee and renamed what used to be “Labor and Business Relations” as the Workforce Committee.

Some non-political trivia: the 50 Iowa senators include two Taylors, a Democrat and a Republican. As for first names, there are three Jeffs and two men each named Mark, Mike, and Dan.

Editor’s note: This analysis has been updated with unofficial results from all the races. Original post follows.

The major parties have spent hundreds of thousands of dollars on the most competitive 2022 Iowa House and Senate races.

This post highlights seven state Senate districts where one or both parties have spent large sums, and another seven where even without a big investment by Democrats or Republicans, the results could shed light on political trends.

All voter registration totals listed below come from the Iowa Secretary of State’s office, as reported on November 1. All absentee ballot figures come from the Secretary of State’s office, as reported on November 7. All past election results come from the map Josh Hughes created in Dave’s Redistricting App.

All figures for in-kind spending by the Iowa Democratic Party or Republican Party of Iowa come from filings with the Iowa Ethics and Campaign Disclosure Board. I focus on in-kind spending, because candidates in battleground Iowa legislative races typically give most of their funds to the state party. The party then covers the bulk of the large expenditures for direct mail and/or television, radio, and digital advertising.

Now that Iowa’s political maps for the next decade have been finalized, it’s time to look more closely at the district lines in and near larger metro areas. Although most districts anchored in cities are safe for Democrats, these metros will include quite a few battleground Iowa House and Senate races over the next two election cycles. Several “micropolitan” districts containing mid-sized cities remain competitive as well, and a forthcoming post will cover those maps.

I’ll write more about the political landscape of individual House or Senate districts once lawmakers and other contenders have confirmed their plans for next year. Several incumbent match-ups have already been worked out, and I’m continuing to update this post. (Please send tips on candidate announcements.)

I’ve grouped each Iowa Senate district with the two state House districts it wholly contains.