Iowa Senate District 21

Tue, Nov 3 · Represented by Mike Bousselot Republican (not a candidate in 2026) · Member list as of Oct 28

No published poll names both candidates.Last result · 2022 general (different candidates): Mike Bousselot (R) 50.9, Todd Brady (D) 49.0

Heather MatsonDemocratic4 years since first win on file

Last election: Mike Bousselot (Republican) won by 1.9 points, 2022
On the 2026 ballot: 2 candidates

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Left column: HollinrakeRight column: Matson

Donor-based spectrum: LiberalCentristConservativeMatsonNo published score for Hollinrake
Races won and lost: None on file; 3-2
Years since first win on file: Not available; 4

How these are counted

The spectrum is a published research score, not our rating. How this works. Wins and losses count the races in our results files, the same as each profile.

More about this race

Candidates on the ballot

Open seat

The current holder, Mike Bousselot, is not on the candidate list.

Heather MatsonDemocratic
John HollinrakeRepublican

Source: sos.iowa.gov (PDF), dated Aug 19

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State Senate District 1· Catelin Drey
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State Senate District 3· Lynn Evans
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State Senate District 5· Dave Rowley
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State Senate District 16· Renee Hardman
State Senate District 17· Izaah Knox
State Senate District 18· Janet Petersen
State Senate District 19· Ken Rozenboom
State Senate District 20· Mike Pike
State Senate District 21· Mike Bousselot
State Senate District 22· Matt Blake
State Senate District 23· Jack Whitver
State Senate District 24· Jesse Green
State Senate District 25· Herman Quirmbach
State Senate District 26· Kara Warme
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State Senate District 39· Liz Bennett
State Senate District 40· Art Staed
State Senate District 41· Kerry Gruenhagen
State Senate District 42· Charlie McClintock
State Senate District 43· Zach Wahls
State Senate District 44· Adrian Dickey
State Senate District 45· Janice Weiner
State Senate District 46· Dawn Driscoll
State Senate District 47· Scott Webster
State Senate District 48· Mark Lofgren
State Senate District 49· Cindy Winckler
State Senate District 50· Jeff Reichman

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Official results for Iowa

History (17 elections for this seat)

Votes for listed candidates: 29,256
Election day: November 8, 2022
District map: Older district map (2022)

Iowa Senate District 21, 1968 to 2022, 2022, every candidate
Candidate	Party	Votes and share	Share
RepublicanMike BousselotWon	Republican	14,89650.9%	50.9%
DemocraticTodd Brady	Democratic	14,33649.0%	49.0%
Scattered write-ins	Write-in	240.1%	0.1%

Iowa Senate District 21, 1968 to 2022, 2018, every candidate
Candidate	Party	Votes and share	Share
DemocraticClaire CelsiWon	Democratic	20,49966.1%	66.1%
RepublicanBrian B. Bales	Republican	10,51133.9%	33.9%

Iowa Senate District 21, 1968 to 2022, 2014, every candidate
Candidate	Party	Votes and share	Share
DemocraticMatt McCoyWon(incumbent)	Democratic	17,85197.2%	97.2%
Scattered write-ins	Write-in	5082.8%	2.8%

Votes for listed candidates: 25,877
Election day: November 2, 2010
District map: Older district map (2002 to 2011)

Iowa Senate District 21, 1968 to 2022, 2010, every candidate
Candidate	Party	Votes and share	Share
DemocraticDennis H. BlackWon(incumbent)	Democratic	13,51752.2%	52.2%
RepublicanJoe Pirillo	Republican	12,32147.6%	47.6%
Scattered write-ins	Write-in	390.1%	0.1%

Votes for listed candidates: 23,942
Election day: November 7, 2006
District map: Older district map (2002 to 2011)

Iowa Senate District 21, 1968 to 2022, 2006, every candidate
Candidate	Party	Votes and share	Share
DemocraticDennis H. BlackWon(incumbent)	Democratic	13,48656.3%	56.3%
RepublicanTim Morgan	Republican	10,45643.7%	43.7%

Votes for listed candidates: 23,056
Election day: November 5, 2002
District map: Older district map (2002 to 2011)

Iowa Senate District 21, 1968 to 2022, 2002, every candidate
Candidate	Party	Votes and share	Share
DemocraticDennis H. BlackWon(incumbent)	Democratic	14,20261.6%	61.6%
RepublicanKen Rogers	Republican	8,85438.4%	38.4%

Votes for listed candidates: 18,510
Election day: November 3, 1998
District map: Older district map (1992 to 2001)

Iowa Senate District 21, 1968 to 2022, 1998, every candidate
Candidate	Party	Votes and share	Share
RepublicanMaggie TinsmanWon(incumbent)	Republican	12,55067.8%	67.8%
DemocraticTommy Jacobson	Democratic	5,96032.2%	32.2%

Iowa Senate District 21, 1968 to 2022, 1994, every candidate
Candidate	Party	Votes and share	Share
RepublicanMaggie TinsmanWon(incumbent)	Republican	12,473100.0%	100.0%

Votes for listed candidates: 26,210
Election day: November 3, 1992
District map: Older district map (1992 to 2001)

Iowa Senate District 21, 1968 to 2022, 1992, every candidate
Candidate	Party	Votes and share	Share
RepublicanMaggie TinsmanWon(incumbent)	Republican	17,49066.7%	66.7%
DemocraticThomas C. Pritzsche	Democratic	8,72033.3%	33.3%

Iowa Senate District 21, 1968 to 2022, 1990, every candidate
Candidate	Party	Votes and share	Share
DemocraticPatrick J. DeluheryWon(incumbent)	Democratic	8,268100.0%	100.0%

Votes for listed candidates: 13,463
Election day: November 4, 1986
District map: Older district map (1982 to 1991)

Iowa Senate District 21, 1968 to 2022, 1986, every candidate
Candidate	Party	Votes and share	Share
DemocraticPatrick J. DeluheryWon(incumbent)	Democratic	8,93066.3%	66.3%
RepublicanCarter Lebeau	Republican	4,53033.6%	33.6%
Scattered write-ins	Write-in	30.0%	0.0%

Votes for listed candidates: 17,185
Election day: November 2, 1982
District map: Older district map (1982 to 1991)

Iowa Senate District 21, 1968 to 2022, 1982, every candidate
Candidate	Party	Votes and share	Share
DemocraticPatrick J. DeluheryWon(incumbent)	Democratic	10,82763.0%	63.0%
RepublicanGloria Grilk	Republican	6,35837.0%	37.0%

Votes for listed candidates: 18,991
Election day: November 7, 1978
District map: Older district map (1972 to 1981)

Iowa Senate District 21, 1968 to 2022, 1978, every candidate
Candidate	Party	Votes and share	Share
RepublicanJohn S. MurrayWon(incumbent)	Republican	11,90662.7%	62.7%
DemocraticLarry N. Larson	Democratic	7,08337.3%	37.3%
Scattered write-ins	Write-in	20.0%	0.0%

Votes for listed candidates: 20,054
Election day: November 4, 1974
District map: Older district map (1972 to 1981)

Iowa Senate District 21, 1968 to 2022, 1974, every candidate
Candidate	Party	Votes and share	Share
RepublicanJohn S. MurrayWon(incumbent)	Republican	11,53957.5%	57.5%
DemocraticTom Richards	Democratic	8,51442.5%	42.5%
Scattered write-ins	Write-in	10.0%	0.0%

Votes for listed candidates: 26,628
Election day: November 7, 1972
District map: Older district map (1972 to 1981)

Iowa Senate District 21, 1968 to 2022, 1972, every candidate
Candidate	Party	Votes and share	Share
RepublicanJohn S. MurrayWon	Republican	13,84152.0%	52.0%
DemocraticBarbara A. Koerber	Democratic	12,78748.0%	48.0%

Votes for listed candidates: 15,367
Election day: November 3, 1970
District map: Older district map (1970 to 1971)

Iowa Senate District 21, 1968 to 2022, 1970, every candidate
Candidate	Party	Votes and share	Share
RepublicanCharles F. BallounWon(incumbent)	Republican	8,05352.4%	52.4%
DemocraticErnest Groth	Democratic	7,31447.6%	47.6%

Votes for listed candidates: 20,457
Election day: November 5, 1968
District map: Older district map (1966 to 1969)

Iowa Senate District 21, 1968 to 2022, 1968, every candidate
Candidate	Party	Votes and share	Share
DemocraticAlan ShirleyWon(incumbent)	Democratic	10,44351.0%	51.0%
RepublicanLeroy H. Petersen	Republican	10,01449.0%	49.0%

1968 to 2022: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), retrieved Oct 28, 2026. Compiled by Carl Klarner (Harvard Dataverse) from official returns; not an official source

Last contest in this district on file: 2022.

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Election Wrld. (2026). Iowa Senate District 21, election results 1968 to 2022. https://www.electionwrld.com/ia/senate/21. Retrieved October 30, 2026.

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Sources

Sources: Census TIGERweb Legislative MapServer (120th CDs layer 0, 119th CDs layer 4, 2026 SLD upper layer 1 and lower layer 2) (US Census Bureau, public domain), retrieved Oct 28, 2026; Open Civic Data division identifiers (census_autogenerated us_sldl/us_sldu and openstates state files); also (sld-recent.json): Open Civic Data division identifiers (country-us) (CC0 (repository); also (sld-recent.json): CC0 1.0), retrieved Oct 28, 2026; Open States people (current) CSVs (CC0-1.0 (Open States people data)), retrieved Oct 28, 2026, compiled by Open States volunteers and staff (rosters from state legislature sites) from official returns, not an official source; State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse) (CC0 1.0), retrieved Oct 28, 2026, compiled by Carl Klarner (Harvard Dataverse) from official returns, not an official source.

District id: ocd-division/country:us/state:ia/sldu:21

DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), DIME (ODC-BY)Data as of Oct 28, 2026