Iowa Senate District 34
Next vote Tue, Nov 3, 2026 · Represented by Dan Zumbach Republican · Member list as of Oct 28
This seat has no race on the official 2026 list.
- Last election
- Dan Zumbach (Republican) won by 33.5 points, 2024
More about this seat
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- More than one party
- No member on file
List every Senate district (50)
- State Senate District 1· Catelin Drey
- State Senate District 2· Jeff Taylor
- State Senate District 3· Lynn Evans
- State Senate District 4· Tim Kraayenbrink
- State Senate District 5· Dave Rowley
- State Senate District 6· Jason Schultz
- State Senate District 7· Kevin Alons
- State Senate District 8· Mark Costello
- State Senate District 9· Tom Shipley
- State Senate District 10· Dan Dawson
- State Senate District 11· No member on file
- State Senate District 12· Amy Sinclair
- State Senate District 13· Cherielynn Westrich
- State Senate District 14· Sarah Garriott
- State Senate District 15· Tony Bisignano
- 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
- State Senate District 27· Annette Sweeney
- State Senate District 28· Dennis Guth
- State Senate District 29· Sandy Salmon
- State Senate District 30· Doug Campbell
- State Senate District 31· Bill Dotzler
- State Senate District 32· Mike Klimesh
- State Senate District 33· Carrie Koelker
- State Senate District 34· Dan Zumbach
- State Senate District 35· Mike Zimmer
- State Senate District 36· Tom Townsend
- State Senate District 37· Molly Donahue
- State Senate District 38· Dave Sires
- 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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History (16 elections for this seat)
- Votes for listed candidates
- 32,935
- Election day
- November 5, 2024
- District map
- Older district map (2022 to 2024)
Iowa Senate District 34, 1970 to 2024, 2024, every candidate Candidate Party Votes and share Share RepublicanDan ZumbachWon Republican 21,96266.7% DemocraticJoe Hegland Democratic 10,93733.2% Scattered write-ins Write-in 360.1% - Votes for listed candidates
- 30,408
- Election day
- November 3, 2020
- District map
- Older district map (2012 to 2021)
Iowa Senate District 34, 1970 to 2024, 2020, every candidate Candidate Party Votes and share Share DemocraticLiz MathisWon(incumbent) Democratic 29,34296.5% Scattered write-ins Write-in 1,0663.5% - Votes for listed candidates
- 35,711
- Election day
- November 8, 2016
- District map
- Older district map (2012 to 2021)
Iowa Senate District 34, 1970 to 2024, 2016, every candidate Candidate Party Votes and share Share DemocraticLiz MathisWon(incumbent) Democratic 20,00856.0% RepublicanRene Gadelha Republican 15,67343.9% Scattered write-ins Write-in 300.1% - Votes for listed candidates
- 34,603
- Election day
- November 6, 2012
- District map
- Older district map (2012 to 2021)
Iowa Senate District 34, 1970 to 2024, 2012, every candidate Candidate Party Votes and share Share DemocraticLiz MathisWon Democratic 21,17861.2% RepublicanRyan Flood Republican 13,40138.7% Scattered write-ins Write-in 240.1% - Votes for listed candidates
- 27,320
- Election day
- November 4, 2008
- District map
- Older district map (2002 to 2011)
Iowa Senate District 34, 1970 to 2024, 2008, every candidate Candidate Party Votes and share Share DemocraticDick L. DeardenWon(incumbent) Democratic 17,70564.8% RepublicanScott Strosahl Republican 9,61535.2% - Votes for listed candidates
- 19,346
- Election day
- November 2, 2004
- District map
- Older district map (2002 to 2011)
Iowa Senate District 34, 1970 to 2024, 2004, every candidate Candidate Party Votes and share Share DemocraticDick L. DeardenWon(incumbent) Democratic 19,346100.0% - Votes for listed candidates
- 13,366
- Election day
- November 5, 2002
- District map
- Older district map (2002 to 2011)
Iowa Senate District 34, 1970 to 2024, 2002, every candidate Candidate Party Votes and share Share DemocraticDick L. DeardenWon(incumbent) Democratic 13,366100.0% - Votes for listed candidates
- 16,393
- Election day
- November 7, 2000
- District map
- Older district map (1992 to 2001)
Iowa Senate District 34, 1970 to 2024, 2000, every candidate Candidate Party Votes and share Share DemocraticMatt McCoyWon(incumbent) Democratic 16,393100.0% - Votes for listed candidates
- 19,364
- Election day
- November 5, 1996
- District map
- Older district map (1992 to 2001)
Iowa Senate District 34, 1970 to 2024, 1996, every candidate Candidate Party Votes and share Share DemocraticMatt McCoyWon Democratic 13,26268.5% RepublicanChuck Austin Republican 6,10231.5% - Votes for listed candidates
- 17,851
- Election day
- November 3, 1992
- District map
- Older district map (1992 to 2001)
Iowa Senate District 34, 1970 to 2024, 1992, every candidate Candidate Party Votes and share Share DemocraticTony BisignanoWon Democratic 17,851100.0% - Votes for listed candidates
- 23,606
- Election day
- November 8, 1988
- District map
- Older district map (1982 to 1991)
Iowa Senate District 34, 1970 to 2024, 1988, every candidate Candidate Party Votes and share Share DemocraticJohn A. PetersonWon Democratic 13,72958.2% RepublicanJohn C. Rhodes Republican 9,87541.8% Scattered write-ins Write-in 20.0% - Votes for listed candidates
- 22,328
- Election day
- November 6, 1984
- District map
- Older district map (1982 to 1991)
Iowa Senate District 34, 1970 to 2024, 1984, every candidate Candidate Party Votes and share Share DemocraticJohn E. NeighburWon Democratic 12,68656.8% RepublicanJerry G. Davis Republican 9,64243.2% - Votes for listed candidates
- 21,993
- Election day
- November 4, 1980
- District map
- Older district map (1972 to 1981)
Iowa Senate District 34, 1970 to 2024, 1980, every candidate Candidate Party Votes and share Share DemocraticGeorge R. KinleyWon(incumbent) Democratic 14,92767.9% RepublicanGary E. Cozad Republican 6,80730.9% OtherTex Allen Other 2591.2% - Votes for listed candidates
- 20,943
- Election day
- November 2, 1976
- District map
- Older district map (1972 to 1981)
Iowa Senate District 34, 1970 to 2024, 1976, every candidate Candidate Party Votes and share Share DemocraticGeorge R. KinleyWon(incumbent) Democratic 15,19972.6% RepublicanKappie Spencer Republican 5,74427.4% - Votes for listed candidates
- 20,550
- Election day
- November 7, 1972
- District map
- Older district map (1972 to 1981)
Iowa Senate District 34, 1970 to 2024, 1972, every candidate Candidate Party Votes and share Share DemocraticGeorge R. KinleyWon Democratic 14,05668.4% RepublicanJoseph S. Kelly Republican 6,49431.6% - Votes for listed candidates
- 16,149
- Election day
- November 3, 1970
- District map
- Older district map (1970 to 1971)
Iowa Senate District 34, 1970 to 2024, 1970, every candidate Candidate Party Votes and share Share DemocraticEugene M. HillWon(incumbent) Democratic 8,50952.7% RepublicanMartin O. Oconnor Republican 7,64047.3%
- 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
- 1970 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
Last contest in this district on file: 2024.
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Cite this page
Election Wrld. (2026). Iowa Senate District 34, election results 1970 to 2024. https://www.electionwrld.com/ia/senate/34. Retrieved October 30, 2026.
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<iframe src="https://www.electionwrld.com/embed/ia/senate/34" title="Iowa Senate District 34" 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:34
DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse)Data as of Oct 28, 2026