Iowa State Senate District 20
Next vote Tue, Nov 3, 2026 · Represented by Mike Pike Republican · Member list as of Oct 28
This seat has no race on the official 2026 list.
- Last election
- Mike Pike (Republican) won by 0.2 points, 2024
More about this seat
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- Republican
- Independent
- Nonpartisan
- More than one party
- No member listed
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History (16 elections for this seat)
- Votes for listed candidates
- 31,310
- Election day
- November 5, 2024
- District map
- Older district map (2022 to 2024)
Iowa Senate District 20, 1968 to 2024, 2024, every candidate Candidate Party Votes and share Share RepublicanMike PikeWon Republican 15,64450.0% DemocraticNate Boulton Democratic 15,60049.8% Scattered write-ins Write-in 660.2% - Votes for listed candidates
- 42,962
- Election day
- November 3, 2020
- District map
- Older district map (2012 to 2021)
Iowa Senate District 20, 1968 to 2024, 2020, every candidate Candidate Party Votes and share Share RepublicanBrad ZaunWon(incumbent) Republican 21,94351.1% DemocraticRhonda Martin Democratic 20,96848.8% Scattered write-ins Write-in 510.1% - Votes for listed candidates
- 37,738
- Election day
- November 8, 2016
- District map
- Older district map (2012 to 2021)
Iowa Senate District 20, 1968 to 2024, 2016, every candidate Candidate Party Votes and share Share RepublicanBrad ZaunWon(incumbent) Republican 22,43159.4% DemocraticMiyoko Hikiji Democratic 15,23840.4% Scattered write-ins Write-in 690.2% - Votes for listed candidates
- 25,230
- Election day
- November 6, 2012
- District map
- Older district map (2012 to 2021)
Iowa Senate District 20, 1968 to 2024, 2012, every candidate Candidate Party Votes and share Share RepublicanBrad ZaunWon(incumbent) Republican 24,23696.1% Scattered write-ins Write-in 9943.9% - Votes for listed candidates
- 29,443
- Election day
- November 4, 2008
- District map
- Older district map (2002 to 2011)
Iowa Senate District 20, 1968 to 2024, 2008, every candidate Candidate Party Votes and share Share RepublicanTim L. KapucianWon Republican 15,52752.7% DemocraticRandy L. Braden Democratic 13,91647.3% - Votes for listed candidates
- 21,784
- Election day
- November 2, 2004
- District map
- Older district map (2002 to 2011)
Iowa Senate District 20, 1968 to 2024, 2004, every candidate Candidate Party Votes and share Share RepublicanJohn PutneyWon(incumbent) Republican 21,784100.0% - Votes for listed candidates
- 19,941
- Election day
- November 5, 2002
- District map
- Older district map (2002 to 2011)
Iowa Senate District 20, 1968 to 2024, 2002, every candidate Candidate Party Votes and share Share RepublicanJohn PutneyWon Republican 12,26361.5% DemocraticDonald W. Wanatee Democratic 7,67838.5% - Votes for listed candidates
- 24,612
- Election day
- November 7, 2000
- District map
- Older district map (1992 to 2001)
Iowa Senate District 20, 1968 to 2024, 2000, every candidate Candidate Party Votes and share Share DemocraticThomas L. FiegenWon Democratic 12,64151.4% RepublicanJack Rife(incumbent) Republican 11,97148.6% - Votes for listed candidates
- 21,402
- Election day
- November 5, 1996
- District map
- Older district map (1992 to 2001)
Iowa Senate District 20, 1968 to 2024, 1996, every candidate Candidate Party Votes and share Share RepublicanJack RifeWon(incumbent) Republican 12,81359.9% DemocraticJill Cirivello Democratic 8,58940.1% - Votes for listed candidates
- 24,229
- Election day
- November 3, 1992
- District map
- Older district map (1992 to 2001)
Iowa Senate District 20, 1968 to 2024, 1992, every candidate Candidate Party Votes and share Share RepublicanJack RifeWon(incumbent) Republican 12,41451.2% DemocraticBeverly A. Hannon(incumbent) Democratic 11,81548.8% - Votes for listed candidates
- 25,648
- Election day
- November 8, 1988
- District map
- Older district map (1982 to 1991)
Iowa Senate District 20, 1968 to 2024, 1988, every candidate Candidate Party Votes and share Share RepublicanMaggie TinsmanWon Republican 19,50576.0% DemocraticGary P. Genazzio Democratic 6,12423.9% Scattered write-ins Write-in 190.1% - Votes for listed candidates
- 25,969
- Election day
- November 6, 1984
- District map
- Older district map (1982 to 1991)
Iowa Senate District 20, 1968 to 2024, 1984, every candidate Candidate Party Votes and share Share RepublicanEdgar H. HoldenWon(incumbent) Republican 17,05765.7% DemocraticWalter L. Knapper Democratic 8,91234.3% - Votes for listed candidates
- 24,349
- Election day
- November 4, 1980
- District map
- Older district map (1972 to 1981)
Iowa Senate District 20, 1968 to 2024, 1980, every candidate Candidate Party Votes and share Share RepublicanMick LuraWon Republican 13,29654.6% DemocraticRalph Howe Democratic 11,04945.4% Scattered write-ins Write-in 40.0% - Votes for listed candidates
- 24,402
- Election day
- November 2, 1976
- District map
- Older district map (1972 to 1981)
Iowa Senate District 20, 1968 to 2024, 1976, every candidate Candidate Party Votes and share Share RepublicanElizabeth R. MillerWon(incumbent) Republican 12,31750.5% DemocraticLarry A. Raymon Democratic 12,08549.5% - Votes for listed candidates
- 22,728
- Election day
- November 7, 1972
- District map
- Older district map (1972 to 1981)
Iowa Senate District 20, 1968 to 2024, 1972, every candidate Candidate Party Votes and share Share RepublicanElizabeth R. MillerWon Republican 13,87961.1% DemocraticRobert E. Rider Sr. Democratic 8,84738.9% Scattered write-ins Write-in 20.0% - Votes for listed candidates
- 36,428
- Election day
- November 5, 1968
- Seats
- 2
- District map
- Older district map (1966 to 1969)
Iowa Senate District 20, 1968 to 2024, 1968, every candidate Candidate Party Votes and share Share DemocraticWilliam D. PalmerWon Democratic 13,18257.1% RepublicanJames R. Maggert Republican 9,89242.9% DemocraticLee H. Gaudineer Jr.Won(incumbent) Democratic 8,12260.8% RepublicanJoseph G. Bertroche Republican 5,23239.2%
- 2024: MEDSL 2024 official precinct returns (individual_states zips), retrieved Oct 28, 2026. Compiled by MIT Election Data and Science Lab (MEDSL) from official returns; not an official source
- 1968 to 2020: 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
Only part of this chamber is up in a given cycle. Which districts vote on which date is not on file. Last contest in this district on file: 2024.
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Cite this page
Election Wrld. (2026). Iowa State Senate District 20, election results 1968 to 2024. https://www.electionwrld.com/ia/senate/20. Retrieved October 31, 2026.
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<iframe src="https://www.electionwrld.com/embed/ia/senate/20" title="Iowa Senate District 20" width="100%" height="400" style="border:0;max-width:640px" loading="lazy"></iframe>
<p style="font-size:13px">Data: <a href="https://www.electionwrld.com">Election Wrld</a>, CC BY 4.0</p>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; MEDSL 2024 official precinct returns (individual_states zips) (Not stated in the GitHub repository (an earlier label said "MIT (repo)", which the repository does not support). MEDSL's Harvard Dataverse records are CC0 1.0, but these GitHub files were not checksum-matched to the Dataverse files, so CC0 is not claimed for them.), retrieved Oct 28, 2026, compiled by MIT Election Data and Science Lab (MEDSL) 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:20
DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), MEDSL 2024 official precinct returnsData as of Oct 28, 2026