2016 general · November 8, 2016
2016 Iowa State Senate election results, district by district
Every Iowa State Senate district in the 2016 general election: winners, margins, unopposed seats and seats that changed party.
Seats after the election
Republicans controlled the chamber · 50 seats
After the electionD 20 · R 30
Races25
Changed party6
Unopposed12%3 races
Incumbents defeated6
Every district
D 6 · R 19
| Race | Winner | Won by | Notes |
|---|---|---|---|
| SD-2 | Randy Feenstra (R) | Unopposed | |
| SD-4 | Dennis Guth (R) | 21.4 | |
| SD-6 | Mark Segebart (R) | 66.5 | |
| SD-8 | Dan Dawson (R) | 8.1 | FlippedIncumbent lost |
| SD-10 | Jake Chapman (R) | 33.4 | |
| SD-12 | Mark Costello (R) | 56.6 | |
| SD-14 | Amy Sinclair (R) | 48.5 | |
| SD-16 | Nate Boulton (D) | 25.3 | |
| SD-18 | Janet Petersen (D) | Unopposed | |
| SD-20 | Brad Zaun (R) | 19.1 | |
| SD-22 | Charles Schneider (R) | 11.7 | |
| SD-24 | Jerry Behn (R) | 27.7 | |
| SD-26 | Waylon Brown (R) | 24.7 | FlippedIncumbent lost |
| SD-28 | Michael Breitbach (R) | 22.3 | |
| SD-30 | Jeff Danielson (D) | 17.4 | |
| SD-32 | Craig Johnson (R) | 19.9 | FlippedIncumbent lost |
| SD-34 | Liz Mathis (D) | 12.1 | |
| SD-36 | Jeff Edler (R) | 5.8 | FlippedIncumbent lost |
| SD-38 | Tim Kapucian (R) | 26.0 | |
| SD-40 | Ken Rozenboom (R) | Unopposed | |
| SD-42 | Rich Taylor (D) | 0.6 | |
| SD-44 | Thomas A. Greene (R) | 5.1 | FlippedIncumbent lost |
| SD-46 | Mark Lofgren (R) | 13.6 | FlippedIncumbent lost |
| SD-48 | Dan Zumbach (R) | 29.7 | |
| SD-50 | Pam Jochum (D) | 26.6 |
Iowa State Senate
Results are each source's final count; margins are the winner's lead over the runner-up in points of the vote. Source: MIT Election Data and Science Lab