# 2020 Iowa Senate election

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The 2020 Iowa State Senate elections took place as part of the biennial 2020 United States state legislative elections. Iowa voters elected state senators in half of the state senate's districts – the 25 even-numbered state senate districts. State senators serve four-year terms in the Iowa Senate, with half of the seats up for election each cycle.
A statewide map of the 50 state Senate districts in the 2020 elections is provided by the Iowa General Assembly here.
The primary election on June 2, 2020, determined which candidates appeared on the November 3 general election ballot. The filing deadline was March 13.
Following the previous election in 2018, Republicans retained control of the Iowa Senate with 32 seats to Democrats' 18 seats. To reclaim control of the chamber from Republicans, the Democrats needed to net eight Senate seats.
Republicans retained control of the Iowa Senate following the 2020 general election, with the balance of power remaining unchanged.

## Predictions

| Source | Ranking | As of |
| The Cook Political Report | Likely R | October 21, 2020 |

## Summary of results

* NOTE: The 25 odd-numbered districts did not hold elections in 2020 so they are not listed here.
| State Senate District | Incumbent | Party | Elected Senator | Party |
| 2nd | Randy Feenstra | Rep | Jeff Taylor | Rep |
| 4th | Dennis Guth | Rep | Dennis Guth | Rep |
| 6th | Mark Segebart | Rep | Craig Steven Williams | Rep |
| 8th | Dan Dawson | Rep | Dan Dawson | Rep |
| 10th | Jake Chapman | Rep | Jake Chapman | Rep |
| 12th | Mark Costello | Rep | Mark Costello | Rep |
| 14th | Amy Sinclair | Rep | Amy Sinclair | Rep |
| 16th | Nate Boulton | Dem | Nate Boulton | Dem |
| 18th | Janet Petersen | Dem | Janet Petersen | Dem |
| 20th | Brad Zaun | Rep | Brad Zaun | Rep |
| 22nd | Charles Schneider | Rep | Sarah Trone Garriott | Dem |
| 24th | Jerry Behn | Rep | Jesse Green | Rep |
| 26th | Waylon Brown | Rep | Waylon Brown | Rep |
| 28th | Michael Breitbach | Rep | Mike Klimesh | Rep |
| 30th | Eric Giddens | Dem | Eric Giddens | Dem |
| 32nd | Craig Johnson | Rep | Craig Johnson | Rep |
| 34th | Liz Mathis | Dem | Liz Mathis | Dem |
| 36th | Jeff Edler | Rep | Jeff Edler | Rep |
| 38th | Tim Kapucian | Rep | Dawn Driscoll | Rep |
| 40th | Ken Rozenboom | Rep | Ken Rozenboom | Rep |
| 42nd | Rich Taylor | Dem | Jeff Reichman | Rep |
| 44th | Thomas Greene | Rep | Tim Goodwin | Rep |
| 46th | Mark Lofgren | Rep | Mark Lofgren | Rep |
| 48th | Dan Zumbach | Rep | Dan Zumbach | Rep |
| 50th | Pam Jochum | Dem | Pam Jochum | Dem |
Source:

### Closest races

Seats where the margin of victory was under 10%:
* State Senate district 22, 0.36% gain
* State Senate district 20, 2.28%
* State Senate district 30, 3.02%
* State Senate district 8, 4.42%

## Detailed results

* Reminder: Only even-numbered Iowa Senate seats were up for election in 2020; therefore, odd-numbered seats were not having elections in 2020 & are not shown.
* Note: If a district does not list a primary, then that district did not having a competitive primary (i.e., there may have only been one candidate file for that district).

### District 2

Iowa Senate, District 2 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Jeff Taylor | 26,395 | 100.0 |
| Total votes | Total votes | Total votes | 26,395 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 4

Iowa Senate, District 4 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Dennis Guth (incumbent) | 25,450 | 100.0 |
| Total votes | Total votes | Total votes | 25,450 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 6

Iowa Senate, District 6 Republican Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Craig Williams | 3,132 | 60.9 |
| | Republican | Heath Hansen | 2,007 | 39.1 |
| Total votes | Total votes | Total votes | 5,139 | 100.0 |
Iowa Senate, District 6 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Craig Steven Williams | 18,919 | 69.2 |
| | Democratic | C.J. Petersen | 8,418 | 30.8 |
| Total votes | Total votes | Total votes | 27,337 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 8

Iowa Senate, District 8 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Dan Dawson (incumbent) | 12,391 | 52.2 |
| | Democratic | Steve Gorman | 11,344 | 47.8 |
| Total votes | Total votes | Total votes | 23,735 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 10

Iowa Senate, District 10 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Jake Chapman (incumbent) | 24,538 | 62.5 |
| | Democratic | Warren Andrew Varley | 14,704 | 37.5 |
| Total votes | Total votes | Total votes | 39,242 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 12

Iowa Senate, District 12 Republican Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Mark Costello (incumbent) | 5,749 | 59.4 |
| | Republican | Richard Crouch | 3,923 | 40.6 |
| Total votes | Total votes | Total votes | 9,672 | 100.0 |
Iowa Senate, District 12 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Mark Costello (incumbent) | 20,165 | 69.1 |
| | Democratic | Joseph "Joey" Norris | 8,999 | 30.9 |
| Total votes | Total votes | Total votes | 29,164 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 14

Iowa Senate, District 14 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Amy Sinclair (incumbent) | 24,623 | 100.0 |
| Total votes | Total votes | Total votes | 24,623 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 16

Iowa Senate, District 16 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Nate Boulton (incumbent) | 16,868 | 76.8 |
| | Libertarian | ToyA S. Johnson | 5,097 | 23.2 |
| Total votes | Total votes | Total votes | 21,965 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### District 18

Iowa Senate, District 18 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Janet Petersen (incumbent) | 20,696 | 100.0 |
| Total votes | Total votes | Total votes | 20,696 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### District 20

Iowa Senate, District 20 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Brad Zaun (incumbent) | 21,943 | 51.1 |
| | Democratic | Rhonda Martin | 20,968 | 48.9 |
| Total votes | Total votes | Total votes | 42,911 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 22

Iowa Senate, District 22 Republican Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Scott Cirksena | 3,683 | 79.3 |
| | Republican | Porsha Hart | 964 | 20.7 |
| Total votes | Total votes | Total votes | 4,647 | 100.0 |
Iowa Senate, District 22 Democratic Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Sarah Trone Garriott | 4,300 | 47.9 |
| | Democratic | Tricia Gavin | 3,480 | 38.7 |
| | Democratic | Michael Libbie | 1,206 | 13.4 |
| Total votes | Total votes | Total votes | 8,986 | 100.0 |
Iowa Senate, District 22 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Sarah Trone Garriott | 23,110 | 50.2 |
| | Republican | Scott Cirksena | 22,946 | 49.8 |
| Total votes | Total votes | Total votes | 46,056 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### District 24

Iowa Senate, District 24 Republican Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Jesse Green | 2,350 | 40.8 |
| | Republican | Chad Behn | 1,837 | 31.9 |
| | Republican | Todd Rasmussen | 1,127 | 19.6 |
| | Republican | Joshua D. Dyer | 442 | 7.7 |
| Total votes | Total votes | Total votes | 5,756 | 100.0 |
Iowa Senate, District 24 Democratic Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Cynthia Oppedal Paschen | 3,172 | 67.2 |
| | Democratic | Keith D. Puntenney | 1,548 | 32.8 |
| Total votes | Total votes | Total votes | 4,720 | 100.0 |
Iowa Senate, District 24 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Jesse Green | 21,732 | 65.7 |
| | Democratic | Cynthia Oppedal Paschen | 11,327 | 34.3 |
| Total votes | Total votes | Total votes | 33,059 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 26

Iowa Senate, District 26 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Waylon Brown (incumbent) | 20,655 | 65.5 |
| | Democratic | Deb Scharper | 10,858 | 34.5 |
| Total votes | Total votes | Total votes | 31,513 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 28

Iowa Senate, District 28 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Mike Klimesh | 19,630 | 62.5 |
| | Democratic | Matt Tapscott | 11,785 | 37.5 |
| Total votes | Total votes | Total votes | 31,415 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 30

Iowa Senate, District 30 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Eric Giddens (incumbent) | 17,543 | 51.5 |
| | Republican | Harold Youngblut | 16,516 | 48.5 |
| Total votes | Total votes | Total votes | 34,059 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### District 32

Iowa Senate, District 32 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Craig Johnson (incumbent) | 19,990 | 61.2 |
| | Democratic | Pam Egli | 12,700 | 38.8 |
| Total votes | Total votes | Total votes | 32,690 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 34

Iowa Senate, District 34 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Liz Mathis (incumbent) | 29,342 | 100.0 |
| Total votes | Total votes | Total votes | 29,342 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### District 36

Iowa Senate, District 36 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Jeff Edler (incumbent) | 16,841 | 60.6 |
| | Democratic | David Degner | 10,957 | 39.4 |
| Total votes | Total votes | Total votes | 27,798 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 38

Iowa Senate, District 38 Republican Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Dawn Driscoll | 2,402 | 45.0 |
| | Republican | Garrett Dozark | 1,912 | 35.8 |
| | Republican | Bruce Adams | 1,025 | 19.2 |
| Total votes | Total votes | Total votes | 5,339 | 100.0 |
Iowa Senate, District 38 Democratic Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Ivy Schuster | 3,642 | 81.7 |
| | Democratic | Alvin Aragon | 815 | 18.3 |
| Total votes | Total votes | Total votes | 4,457 | 100.0 |
Iowa Senate, District 38 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Dawn Driscoll | 21,238 | 64.0 |
| | Democratic | Ivy Schuster | 11,948 | 36.0 |
| Total votes | Total votes | Total votes | 33,186 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 40

Iowa Senate, District 40 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Ken Rozenboom (incumbent) | 22,022 | 71.5 |
| | Democratic | Lance Roorda | 8,760 | 28.5 |
| Total votes | Total votes | Total votes | 30,782 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 42

Iowa Senate, District 42 Republican Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Jeff Reichman | 3,338 | 73.8 |
| | Republican | Nancy Amos | 1,187 | 26.2 |
| Total votes | Total votes | Total votes | 4,525 | 100.0 |
Iowa Senate, District 42 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Jeff Reichman | 16,766 | 59.9 |
| | Democratic | Rich Taylor (incumbent) | 11,228 | 40.1 |
| Total votes | Total votes | Total votes | 27,994 | 100.0 |
| | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic | Republican gain from Democratic |

### District 44

Iowa Senate, District 44 Republican Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tim Goodwin | 3,217 | 71.6 |
| | Republican | Matthew Rinker | 1,277 | 28.4 |
| Total votes | Total votes | Total votes | 4,494 | 100.0 |
Iowa Senate, District 44 Democratic Primary Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Tom Courtney | 3,623 | 72.4 |
| | Democratic | Kevin K. Warth | 790 | 15.8 |
| | Democratic | Rex Troute | 592 | 11.8 |
| Total votes | Total votes | Total votes | 5,005 | 100.0 |
Iowa Senate, District 44 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tim Goodwin | 16,447 | 56.8 |
| | Democratic | Tom Courtney | 12,493 | 43.2 |
| Total votes | Total votes | Total votes | 28,940 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 46

Iowa Senate, District 46 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Mark S. Lofgren (incumbent) | 18,479 | 59.4 |
| | Democratic | Chris Brase | 12,653 | 40.6 |
| Total votes | Total votes | Total votes | 31,132 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 48

Iowa Senate, District 48 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Republican | Dan Zumbach (incumbent) | 22,544 | 65.2 |
| | Democratic | Eric Green | 12,050 | 34.8 |
| Total votes | Total votes | Total votes | 34,594 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### District 50

Iowa Senate, District 50 General Election, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Pam Jochum (incumbent) | 18,044 | 58.7 |
| | Republican | Jennifer Smith | 12,677 | 41.3 |
| Total votes | Total votes | Total votes | 30,721 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |