Iowa State House District 100
Tue, Nov 3 · Represented by Blaine Watkins Republican · Member list as of Oct 28
Matthew MohrfeldDemocraticBlaine WatkinsRepublican · Incumbent
No published poll names both candidates.The last winner we have no longer holds this seat, so that result isn't shown.
- Last election
- Martin L. Graber (Republican) won by 35.5 points, 2024
- On the 2026 ballot
- 2 candidates
More about this race
Candidates on the ballot
- Matthew MohrfeldDemocratic
- Blaine WatkinsIncumbentRepublican
Source: sos.iowa.gov (PDF), dated Aug 19
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- More than one party
- No member listed
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History (28 elections for this seat)
- Votes for listed candidates
- 14,001
- Election day
- November 5, 2024
- District map
- Older district map (2022 to 2024)
Iowa House of Representatives District 100, 1970 to 2024, 2024, every candidate Candidate Party Votes and share Share RepublicanMartin L. GraberWon Republican 9,46667.6% OtherNicolas Atwood Other 4,48932.1% Scattered write-ins Write-in 460.3% - Votes for listed candidates
- 10,678
- Election day
- November 8, 2022
- District map
- Older district map (2022)
Iowa House of Representatives District 100, 1970 to 2024, 2022, every candidate Candidate Party Votes and share Share RepublicanMartin L. GraberWon(incumbent) Republican 6,51361.0% DemocraticRebecca Bowker Democratic 4,15438.9% Scattered write-ins Write-in 110.1% - Votes for listed candidates
- 10,320
- Election day
- November 3, 2020
- District map
- Older district map (2012 to 2021)
Iowa House of Representatives District 100, 1970 to 2024, 2020, every candidate Candidate Party Votes and share Share DemocraticCharles IsenhartWon(incumbent) Democratic 9,95396.4% Scattered write-ins Write-in 3673.6% - Votes for listed candidates
- 10,814
- Election day
- November 6, 2018
- District map
- Older district map (2012 to 2021)
Iowa House of Representatives District 100, 1970 to 2024, 2018, every candidate Candidate Party Votes and share Share DemocraticCharles IsenhartWon(incumbent) Democratic 6,79962.9% RepublicanHank Linden Republican 4,01537.1% - Votes for listed candidates
- 9,405
- Election day
- November 8, 2016
- District map
- Older district map (2012 to 2021)
Iowa House of Representatives District 100, 1970 to 2024, 2016, every candidate Candidate Party Votes and share Share DemocraticCharles IsenhartWon(incumbent) Democratic 9,21398.0% Scattered write-ins Write-in 1922.0% - Votes for listed candidates
- 6,814
- Election day
- November 4, 2014
- District map
- Older district map (2012 to 2021)
Iowa House of Representatives District 100, 1970 to 2024, 2014, every candidate Candidate Party Votes and share Share DemocraticCharles IsenhartWon(incumbent) Democratic 6,65797.7% Scattered write-ins Write-in 1572.3% - Votes for listed candidates
- 10,767
- Election day
- November 6, 2012
- District map
- Older district map (2012 to 2021)
Iowa House of Representatives District 100, 1970 to 2024, 2012, every candidate Candidate Party Votes and share Share DemocraticCharles IsenhartWon(incumbent) Democratic 10,55798.0% Scattered write-ins Write-in 2101.9% - Votes for listed candidates
- 6,994
- Election day
- November 2, 2010
- District map
- Older district map (2002 to 2011)
Iowa House of Representatives District 100, 1970 to 2024, 2010, every candidate Candidate Party Votes and share Share RepublicanMark A. BrandenburgWon Republican 3,69952.9% DemocraticPaul Shomshor(incumbent) Democratic 3,28747.0% Scattered write-ins Write-in 80.1% - Votes for listed candidates
- 11,861
- Election day
- November 4, 2008
- District map
- Older district map (2002 to 2011)
Iowa House of Representatives District 100, 1970 to 2024, 2008, every candidate Candidate Party Votes and share Share DemocraticPaul ShomshorWon(incumbent) Democratic 6,20852.3% RepublicanScott A. Belt Republican 5,65347.7% - Votes for listed candidates
- 6,779
- Election day
- November 7, 2006
- District map
- Older district map (2002 to 2011)
Iowa House of Representatives District 100, 1970 to 2024, 2006, every candidate Candidate Party Votes and share Share DemocraticPaul ShomshorWon(incumbent) Democratic 3,56852.6% RepublicanScott A. Belt Republican 3,21147.4% - Votes for listed candidates
- 11,163
- Election day
- November 2, 2004
- District map
- Older district map (2002 to 2011)
Iowa House of Representatives District 100, 1970 to 2024, 2004, every candidate Candidate Party Votes and share Share DemocraticPaul ShomshorWon Democratic 6,75760.5% RepublicanPatrick Tarr Republican 4,40639.5% - Votes for listed candidates
- 4,895
- Election day
- November 5, 2002
- District map
- Older district map (2002 to 2011)
Iowa House of Representatives District 100, 1970 to 2024, 2002, every candidate Candidate Party Votes and share Share RepublicanBrad L. HansenWon(incumbent) Republican 4,895100.0% - Votes for listed candidates
- 11,818
- Election day
- November 7, 2000
- District map
- Older district map (1992 to 2001)
Iowa House of Representatives District 100, 1970 to 2024, 2000, every candidate Candidate Party Votes and share Share DemocraticDennis M. CohoonWon(incumbent) Democratic 7,67364.9% RepublicanMatthew Murray Republican 4,14535.1% - Votes for listed candidates
- 5,807
- Election day
- November 3, 1998
- District map
- Older district map (1992 to 2001)
Iowa House of Representatives District 100, 1970 to 2024, 1998, every candidate Candidate Party Votes and share Share DemocraticDennis M. CohoonWon(incumbent) Democratic 5,807100.0% - Votes for listed candidates
- 7,226
- Election day
- November 5, 1996
- District map
- Older district map (1992 to 2001)
Iowa House of Representatives District 100, 1970 to 2024, 1996, every candidate Candidate Party Votes and share Share DemocraticDennis M. CohoonWon(incumbent) Democratic 7,226100.0% - Votes for listed candidates
- 5,299
- Election day
- November 8, 1994
- District map
- Older district map (1992 to 2001)
Iowa House of Representatives District 100, 1970 to 2024, 1994, every candidate Candidate Party Votes and share Share DemocraticDennis M. CohoonWon(incumbent) Democratic 5,299100.0% - Votes for listed candidates
- 11,819
- Election day
- November 3, 1992
- District map
- Older district map (1992 to 2001)
Iowa House of Representatives District 100, 1970 to 2024, 1992, every candidate Candidate Party Votes and share Share DemocraticDennis M. CohoonWon(incumbent) Democratic 7,61564.4% RepublicanMarlow Bennett Republican 4,20435.6% - Votes for listed candidates
- 6,042
- Election day
- November 6, 1990
- District map
- Older district map (1982 to 1991)
Iowa House of Representatives District 100, 1970 to 2024, 1990, every candidate Candidate Party Votes and share Share DemocraticEmil S. PavichWon(incumbent) Democratic 3,78562.6% RepublicanWilliam C. Rance Republican 2,25737.4% - Votes for listed candidates
- 5,718
- Election day
- November 8, 1988
- District map
- Older district map (1982 to 1991)
Iowa House of Representatives District 100, 1970 to 2024, 1988, every candidate Candidate Party Votes and share Share DemocraticEmil S. PavichWon(incumbent) Democratic 5,718100.0% - Votes for listed candidates
- 3,512
- Election day
- November 4, 1986
- District map
- Older district map (1982 to 1991)
Iowa House of Representatives District 100, 1970 to 2024, 1986, every candidate Candidate Party Votes and share Share DemocraticEmil S. PavichWon(incumbent) Democratic 3,511100.0% Scattered write-ins Write-in 10.0% - Votes for listed candidates
- 5,298
- Election day
- November 6, 1984
- District map
- Older district map (1982 to 1991)
Iowa House of Representatives District 100, 1970 to 2024, 1984, every candidate Candidate Party Votes and share Share DemocraticEmil S. PavichWon(incumbent) Democratic 5,298100.0% - Votes for listed candidates
- 5,806
- Election day
- November 2, 1982
- District map
- Older district map (1982 to 1991)
Iowa House of Representatives District 100, 1970 to 2024, 1982, every candidate Candidate Party Votes and share Share DemocraticEmil S. PavichWon(incumbent) Democratic 4,12871.1% RepublicanMike Sizer Republican 1,67828.9% - Votes for listed candidates
- 9,680
- Election day
- November 4, 1980
- District map
- Older district map (1972 to 1981)
Iowa House of Representatives District 100, 1970 to 2024, 1980, every candidate Candidate Party Votes and share Share DemocraticMarcia K. WalterWon Democratic 4,89650.6% RepublicanGary Galle Republican 4,78449.4% - Votes for listed candidates
- 5,605
- Election day
- November 7, 1978
- District map
- Older district map (1972 to 1981)
Iowa House of Representatives District 100, 1970 to 2024, 1978, every candidate Candidate Party Votes and share Share DemocraticCraig D. WalterWon(incumbent) Democratic 3,50662.5% RepublicanGerald E. Leseberg Republican 2,09937.5% - Votes for listed candidates
- 9,876
- Election day
- November 2, 1976
- District map
- Older district map (1972 to 1981)
Iowa House of Representatives District 100, 1970 to 2024, 1976, every candidate Candidate Party Votes and share Share DemocraticCraig D. WalterWon(incumbent) Democratic 6,48565.7% RepublicanHarry R. Gittins Republican 3,39134.3% - Votes for listed candidates
- 6,825
- Election day
- November 4, 1974
- District map
- Older district map (1972 to 1981)
Iowa House of Representatives District 100, 1970 to 2024, 1974, every candidate Candidate Party Votes and share Share DemocraticCraig D. WalterWon Democratic 4,31163.2% RepublicanRobert L. Howe Republican 2,51436.8% - Votes for listed candidates
- 8,965
- Election day
- November 7, 1972
- District map
- Older district map (1972 to 1981)
Iowa House of Representatives District 100, 1970 to 2024, 1972, every candidate Candidate Party Votes and share Share RepublicanGeorge J. KnokeWon(incumbent) Republican 4,65952.0% DemocraticCraig D. Walter Democratic 4,30648.0% - Votes for listed candidates
- 8,475
- Election day
- November 3, 1970
- District map
- Older district map (1970 to 1971)
Iowa House of Representatives District 100, 1970 to 2024, 1970, every candidate Candidate Party Votes and share Share RepublicanJohn H. ClarkWon Republican 4,43152.3% DemocraticLowell Lee Junkins Democratic 4,04447.7%
- 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 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: 2024.
Download and cite
Cite this page
Election Wrld. (2026). Iowa State House District 100, election results 1970 to 2024. https://www.electionwrld.com/ia/house/100. Retrieved October 31, 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; 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/sldl:100
DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), MEDSL 2024 official precinct returnsData as of Oct 28, 2026