The 2018 Iowa State Senate elections took place as part of the biennial 2018 United States elections. Iowa voters elected state senators in half of the state senate's districts—the 25 odd-numbered state senate districts. State senators serve four-year terms in the Iowa State Senate, with half of the seats up for election each cycle.
The primary election on June 5, 2018, determined which candidates appeared on the November 6, 2018 general election ballot. Primary election results can be obtained here.[2]
Following the previous 2016 Iowa Senate election, Republicans flipped control of the Iowa State Senate, taking control away from the Democrats.
To reclaim control of the chamber from Republicans, the Democrats needed to net six Senate seats.
Republicans expanded their control of the Iowa State Senate following the 2018 general election, increasing their majority from 29 to 32 seats. Democrats saw their numbers dwindle from 20 to 18 seats. The lone Independent member of the IA state Senate was replaced by a Republican as well.
Results
- NOTE: Only odd-numbered Iowa Senate seats were up for election in 2018, so even-numbered seats are not included here.
Source:[3][4]
Closest races
Seats where the margin of victory was under 10%:
- State Senate district 27, 2%
- State Senate district 7, 2.6% gain
- State Senate district 19, 2.8%
- State Senate district 41, 3.6%
- State Senate district 47, 5.6%
- State Senate district 29, 7.2% gain
- State Senate district 39, 9%
- State Senate district 49, 9.8% gain
Predictions
| Source
|
Ranking
|
As of
|
| Governing[5]
|
Safe R
|
October 8, 2018
|
Detailed results
- Reminder: Only odd-numbered Iowa Senate seats were up for election in 2018, so even-numbered seats are not included here.
- Note: If a district does not list a primary, then that district did not have a competitive primary (i.e., there may have only been one candidate file for that district).
District 1
Iowa Senate, District 1 Republican primary, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Zach Whiting
|
3,539
|
62.4
|
|
|
Republican
|
Brad D. Price
|
1,288
|
22.7
|
|
|
Republican
|
Jesse Wolfe
|
844
|
14.9
|
| Total votes
|
5,671
|
100.0
|
Iowa Senate, District 1 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Zach Whiting
|
21,245
|
100.0
|
| Total votes
|
21,245
|
100.0
|
|
|
Republican gain from Independent
|
District 3
District 5
Iowa Senate, District 5 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Tim Kraayenbrink (incumbent)
|
14,571
|
62.0
|
|
|
Democratic
|
John J. O'Brien
|
8,935
|
38.0
|
| Total votes
|
23,506
|
100.0
|
|
|
Republican hold
|
District 7
District 9
Iowa Senate, District 9 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Jason Schultz (incumbent)
|
18,533
|
100.0
|
| Total votes
|
18,533
|
100.0
|
|
|
Republican hold
|
District 11
District 13
Iowa Senate, District 13 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Julian Garrett (incumbent)
|
17,199
|
55.9
|
|
|
Democratic
|
Vicky Brenner
|
13,558
|
44.1
|
| Total votes
|
30,757
|
100.0
|
|
|
Republican hold
|
District 15
District 17
Iowa Senate, District 17 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Tony Bisignano (incumbent)
|
17,808
|
100.0
|
| Total votes
|
17,808
|
100.0
|
|
|
Democratic hold
|
District 19
Iowa Senate, District 19 Republican primary, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Jack Whitver (incumbent)
|
1,369
|
80.8
|
|
|
Republican
|
Brett H. Nelson
|
326
|
19.2
|
| Total votes
|
1,695
|
100.0
|
Iowa Senate, District 19 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Jack Whitver (incumbent)
|
18,598
|
51.4
|
|
|
Democratic
|
Amber Gustafson
|
17,608
|
48.6
|
| Total votes
|
36,206
|
100.0
|
|
|
Republican hold
|
District 21
Iowa Senate, District 21 Democratic primary, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Claire Celsi
|
5,287
|
58.1
|
|
|
Democratic
|
Connie Ryan
|
3,818
|
41.9
|
| Total votes
|
9,105
|
100.0
|
Iowa Senate, District 21 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Claire Celsi
|
20,499
|
66.1
|
|
|
Republican
|
Brian B. Bales
|
10,511
|
33.9
|
| Total votes
|
31,010
|
100.0
|
|
|
Democratic hold
|
District 23
Iowa Senate, District 23 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Herman C. Quirmbach (incumbent)
|
19,020
|
75.2
|
|
|
Libertarian
|
Eric Cooper
|
6,273
|
24.8
|
| Total votes
|
25,293
|
100.0
|
|
|
Democratic hold
|
District 25
Iowa Senate, District 25 Republican primary, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Annette Sweeney (incumbent)
|
2,731
|
82.8
|
|
|
Republican
|
Chad J. Buss
|
566
|
17.2
|
| Total votes
|
3,297
|
100.0
|
Iowa Senate, District 25 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Annette Sweeney (incumbent)
|
16,621
|
61.6
|
|
|
Democratic
|
Tracy Freese
|
10,345
|
38.4
|
| Total votes
|
26,966
|
100.0
|
|
|
Republican hold
|
District 27
Iowa Senate, District 27 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Amanda Ragan (incumbent)
|
12,823
|
51.0
|
|
|
Republican
|
Shannon Latham
|
12,322
|
49.0
|
| Total votes
|
25,145
|
100.0
|
|
|
Democratic hold
|
District 29
District 31
Iowa Senate, District 31 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Bill Dotzler (incumbent)
|
14,573
|
100.0
|
| Total votes
|
14,573
|
100.0
|
|
|
Democratic hold
|
District 33
Iowa Senate, District 33 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Robert M. Hogg (incumbent)
|
17,912
|
65.6
|
|
|
Republican
|
Edward Bernie Hayes
|
9,407
|
34.4
|
| Total votes
|
27,319
|
100.0
|
|
|
Democratic hold
|
District 35
Iowa Senate, District 35 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Todd Taylor
|
19,875
|
100.0
|
| Total votes
|
19,875
|
100.0
|
|
|
Democratic hold
|
District 37
Iowa Senate, District 37 Democratic primary, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Zach Wahls
|
3,902
|
59.6
|
|
|
Democratic
|
Janice Weiner
|
2,281
|
34.9
|
|
|
Democratic
|
Eric Dirth
|
189
|
2.9
|
|
|
Democratic
|
Imad Youssif
|
169
|
2.6
|
| Total votes
|
6,541
|
100.0
|
Iowa Senate, District 37 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Zach Wahls
|
20,321
|
78.5
|
|
|
Libertarian
|
Carl A. Krambeck
|
5,566
|
21.5
|
| Total votes
|
25,887
|
100.0
|
|
|
Democratic hold
|
District 39
Iowa Senate, District 39 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Kevin Kinney (incumbent)
|
15,758
|
54.5
|
|
|
Republican
|
Heather Hora
|
13,130
|
45.5
|
| Total votes
|
28,888
|
100.0
|
|
|
Democratic hold
|
District 41
Iowa Senate, District 41 Republican primary, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Mariannette Miller-Meeks
|
1,706
|
85.9
|
|
|
Republican
|
Daniel Cesar
|
279
|
14.1
|
| Total votes
|
1,985
|
100.0
|
Iowa Senate, District 41 Democratic primary, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Mary S. Stewart
|
2,916
|
58.4
|
|
|
Democratic
|
Ed Malloy
|
2,076
|
41.6
|
| Total votes
|
4,992
|
100.0
|
Iowa Senate, District 41 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Mariannette Miller-Meeks
|
11,460
|
51.8
|
|
|
Democratic
|
Mary S. Stewart
|
10,652
|
48.2
|
| Total votes
|
22,112
|
100.0
|
|
|
Republican hold
|
District 43
Iowa Senate, District 43 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Joe Bolkcom (incumbent)
|
23,790
|
79.6
|
|
|
Republican
|
Patrick Joseph Wronkiewicz
|
6,107
|
20.4
|
| Total votes
|
29,897
|
100.0
|
|
|
Democratic hold
|
District 45
Iowa Senate, District 45 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Democratic
|
Jim Lykam (incumbent)
|
14,629
|
100.0
|
| Total votes
|
14,629
|
100.0
|
|
|
Democratic hold
|
District 47
Iowa Senate, District 47 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Roby Smith (incumbent)
|
16,125
|
52.8
|
|
|
Democratic
|
Marie Gleason
|
14,418
|
47.2
|
| Total votes
|
30,543
|
100.0
|
|
|
Republican hold
|
District 49
Iowa Senate, District 49 general election, 2018
| Party
|
Candidate
|
Votes
|
%
|
|
|
Republican
|
Chris Cournoyer
|
13,305
|
54.9
|
|
|
Democratic
|
Patti Robinson
|
10,916
|
45.1
|
| Total votes
|
24,221
|
100.0
|
|
|
Republican gain from Democratic
|
Source:[6][7]
See also
References
- ^ David Johnson (District 1) switched parties from Republican to "No Party" on June 7, 2016. [1]
- ^ "Primary Election 2018 Canvass Summary" (PDF). Iowa Secretary of State. Retrieved April 1, 2020.
- ^ "Legislators". Iowa State Senate. Retrieved April 1, 2020.
- ^ "Iowa State Senate elections, 2018". Ballotpedia. Retrieved April 1, 2020.
- ^ Jacobson, Louis (October 8, 2018). "A Month Before Election Day, Democrats Poised for Legislative Gains". Governing. Retrieved June 27, 2024.
- ^ "Primary Election 2018 Canvass Summary" (PDF). Iowa Secretary of State. Retrieved April 1, 2020.
- ^ "General Election 2018 Canvass Summary" (PDF). Iowa Secretary of State. Retrieved April 1, 2020.