Iowa State House District 40
Tue, Nov 3 · Represented by Bill Gustoff Republican · Member list as of Oct 28
Bill GustoffRepublican · Incumbent4 years since first winHeather SieversDemocratic
Bill Gustoff 50.9Heather Sievers 49.0
Last result · 2024 generalNo published poll names both candidates.
- Last election
- Bill Gustoff (Republican) won by 1.9 points, 2024
- On the 2026 ballot
- 2 candidates
Side by side
Left column: GustoffRight column: Sievers
- Donor-based spectrum
- LiberalCentristConservativeGustoffNo published score for Sievers
- Races
- Won 2 of 2
- Won 0 of 1
- Years since first win
- 4
- Not available
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
- Heather SieversDemocratic
- Bill GustoffIncumbentRepublican
Source: sos.iowa.gov (PDF), dated Aug 19
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- Democratic
- Republican
- Independent
- Nonpartisan
- More than one party
- No member listed
Map settings
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History (28 elections for this seat)
- Votes for listed candidates
- 17,146
- Election day
- November 5, 2024
- District map
- Older district map (2022 to 2024)
Iowa House of Representatives District 40, 1970 to 2024, 2024, every candidate Candidate Party Votes and share Share RepublicanBill GustoffWon Republican 8,72050.9% DemocraticHeather Sievers Democratic 8,40249.0% Scattered write-ins Write-in 240.1% - Votes for listed candidates
- 12,654
- Election day
- November 8, 2022
- District map
- Older district map (2022)
Iowa House of Representatives District 40, 1970 to 2024, 2022, every candidate Candidate Party Votes and share Share RepublicanBill GustoffWon Republican 6,30049.8% DemocraticMackenzie Bills Democratic 5,87946.5% LibertarianJeni Kadel Libertarian 4693.7% Scattered write-ins Write-in 60.1% - Votes for listed candidates
- 17,725
- Election day
- November 3, 2020
- District map
- Older district map (2012 to 2021)
Iowa House of Representatives District 40, 1970 to 2024, 2020, every candidate Candidate Party Votes and share Share DemocraticJohn ForbesWon(incumbent) Democratic 10,58959.7% RepublicanJon Coen Republican 7,10840.1% Scattered write-ins Write-in 280.2% - Votes for listed candidates
- 11,565
- Election day
- November 6, 2018
- District map
- Older district map (2012 to 2021)
Iowa House of Representatives District 40, 1970 to 2024, 2018, every candidate Candidate Party Votes and share Share DemocraticJohn ForbesWon(incumbent) Democratic 11,565100.0% - Votes for listed candidates
- 17,037
- Election day
- November 8, 2016
- District map
- Older district map (2012 to 2021)
Iowa House of Representatives District 40, 1970 to 2024, 2016, every candidate Candidate Party Votes and share Share DemocraticJohn ForbesWon(incumbent) Democratic 9,66056.7% RepublicanScott Reed Republican 7,33243.0% Scattered write-ins Write-in 450.3% - Votes for listed candidates
- 13,021
- Election day
- November 4, 2014
- District map
- Older district map (2012 to 2021)
Iowa House of Representatives District 40, 1970 to 2024, 2014, every candidate Candidate Party Votes and share Share DemocraticJohn ForbesWon(incumbent) Democratic 7,21955.4% RepublicanRonda Bern Republican 5,78244.4% Scattered write-ins Write-in 200.1% - Votes for listed candidates
- 17,173
- Election day
- November 6, 2012
- District map
- Older district map (2012 to 2021)
Iowa House of Representatives District 40, 1970 to 2024, 2012, every candidate Candidate Party Votes and share Share DemocraticJohn ForbesWon Democratic 9,11353.1% RepublicanMike Brown Republican 8,04446.8% Scattered write-ins Write-in 160.1% - Votes for listed candidates
- 9,180
- Election day
- November 2, 2010
- District map
- Older district map (2002 to 2011)
Iowa House of Representatives District 40, 1970 to 2024, 2010, every candidate Candidate Party Votes and share Share RepublicanLance HorbachWon(incumbent) Republican 9,00498.1% Scattered write-ins Write-in 1761.9% - Votes for listed candidates
- 14,699
- Election day
- November 4, 2008
- District map
- Older district map (2002 to 2011)
Iowa House of Representatives District 40, 1970 to 2024, 2008, every candidate Candidate Party Votes and share Share RepublicanLance HorbachWon(incumbent) Republican 8,91260.6% DemocraticChris Bearden Democratic 5,78739.4% - Votes for listed candidates
- 11,243
- Election day
- November 7, 2006
- District map
- Older district map (2002 to 2011)
Iowa House of Representatives District 40, 1970 to 2024, 2006, every candidate Candidate Party Votes and share Share RepublicanLance HorbachWon(incumbent) Republican 6,24955.6% DemocraticSharon Owens Democratic 4,99444.4% - Votes for listed candidates
- 14,700
- Election day
- November 2, 2004
- District map
- Older district map (2002 to 2011)
Iowa House of Representatives District 40, 1970 to 2024, 2004, every candidate Candidate Party Votes and share Share RepublicanLance HorbachWon(incumbent) Republican 9,80166.7% DemocraticAndrew Smith Democratic 4,89933.3% - Votes for listed candidates
- 7,931
- Election day
- November 5, 2002
- District map
- Older district map (2002 to 2011)
Iowa House of Representatives District 40, 1970 to 2024, 2002, every candidate Candidate Party Votes and share Share RepublicanLance HorbachWon(incumbent) Republican 7,931100.0% - Votes for listed candidates
- 11,942
- Election day
- November 7, 2000
- District map
- Older district map (1992 to 2001)
Iowa House of Representatives District 40, 1970 to 2024, 2000, every candidate Candidate Party Votes and share Share RepublicanBryan J. SieversWon Republican 6,37253.4% DemocraticZachary A. Carstensen Democratic 5,57046.6% - Votes for listed candidates
- 5,589
- Election day
- November 3, 1998
- District map
- Older district map (1992 to 2001)
Iowa House of Representatives District 40, 1970 to 2024, 1998, every candidate Candidate Party Votes and share Share RepublicanDanny J. HolmesWon(incumbent) Republican 5,589100.0% - Votes for listed candidates
- 9,830
- Election day
- November 5, 1996
- District map
- Older district map (1992 to 2001)
Iowa House of Representatives District 40, 1970 to 2024, 1996, every candidate Candidate Party Votes and share Share RepublicanDanny J. HolmesWon Republican 5,42155.1% DemocraticPhilip T. Ramirez Democratic 4,40944.9% - Votes for listed candidates
- 4,934
- Election day
- November 8, 1994
- District map
- Older district map (1992 to 2001)
Iowa House of Representatives District 40, 1970 to 2024, 1994, every candidate Candidate Party Votes and share Share RepublicanSteven E. GrubbsWon(incumbent) Republican 4,934100.0% - Votes for listed candidates
- 11,655
- Election day
- November 3, 1992
- District map
- Older district map (1992 to 2001)
Iowa House of Representatives District 40, 1970 to 2024, 1992, every candidate Candidate Party Votes and share Share RepublicanSteven E. GrubbsWon(incumbent) Republican 7,16661.5% DemocraticHugh Reed Democratic 4,48938.5% - Votes for listed candidates
- 10,475
- Election day
- November 6, 1990
- District map
- Older district map (1982 to 1991)
Iowa House of Representatives District 40, 1970 to 2024, 1990, every candidate Candidate Party Votes and share Share RepublicanDavid A. MillageWon Republican 6,19759.2% DemocraticArnold J. Shileny Democratic 4,27840.8% - Votes for listed candidates
- 13,597
- Election day
- November 8, 1988
- District map
- Older district map (1982 to 1991)
Iowa House of Representatives District 40, 1970 to 2024, 1988, every candidate Candidate Party Votes and share Share RepublicanDon HermannWon(incumbent) Republican 9,21067.7% DemocraticRandy Flowers Democratic 4,38732.3% - Votes for listed candidates
- 6,155
- Election day
- November 4, 1986
- District map
- Older district map (1982 to 1991)
Iowa House of Representatives District 40, 1970 to 2024, 1986, every candidate Candidate Party Votes and share Share RepublicanDon HermannWon(incumbent) Republican 6,154100.0% Scattered write-ins Write-in 10.0% - Votes for listed candidates
- 13,724
- Election day
- November 6, 1984
- District map
- Older district map (1982 to 1991)
Iowa House of Representatives District 40, 1970 to 2024, 1984, every candidate Candidate Party Votes and share Share RepublicanDon HermannWon(incumbent) Republican 9,63970.2% DemocraticBill Bonamour Democratic 4,08529.8% - Votes for listed candidates
- 9,906
- Election day
- November 2, 1982
- District map
- Older district map (1982 to 1991)
Iowa House of Representatives District 40, 1970 to 2024, 1982, every candidate Candidate Party Votes and share Share RepublicanDonald HermannWon Republican 5,73457.9% DemocraticGretchen Hurt Democratic 4,17242.1% - Votes for listed candidates
- 10,919
- Election day
- November 4, 1980
- District map
- Older district map (1972 to 1981)
Iowa House of Representatives District 40, 1970 to 2024, 1980, every candidate Candidate Party Votes and share Share RepublicanLisle CookWon Republican 7,58869.5% DemocraticWilliam Eugene McAlpine Democratic 3,33130.5% - Votes for listed candidates
- 8,042
- Election day
- November 7, 1978
- District map
- Older district map (1972 to 1981)
Iowa House of Representatives District 40, 1970 to 2024, 1978, every candidate Candidate Party Votes and share Share RepublicanJames C. WestWon(incumbent) Republican 5,65070.3% DemocraticRobert D. Eurom Democratic 2,39229.7% - Votes for listed candidates
- 11,353
- Election day
- November 2, 1976
- District map
- Older district map (1972 to 1981)
Iowa House of Representatives District 40, 1970 to 2024, 1976, every candidate Candidate Party Votes and share Share RepublicanJames C. WestWon(incumbent) Republican 7,34164.7% DemocraticVernon Morgart Democratic 4,01135.3% Scattered write-ins Write-in 10.0% - Votes for listed candidates
- 8,385
- Election day
- November 4, 1974
- District map
- Older district map (1972 to 1981)
Iowa House of Representatives District 40, 1970 to 2024, 1974, every candidate Candidate Party Votes and share Share RepublicanJames C. WestWon(incumbent) Republican 5,25762.7% DemocraticJohn Knudson Democratic 3,12837.3% - Votes for listed candidates
- 10,897
- Election day
- November 7, 1972
- District map
- Older district map (1972 to 1981)
Iowa House of Representatives District 40, 1970 to 2024, 1972, every candidate Candidate Party Votes and share Share RepublicanJames C. WestWon Republican 6,80562.5% DemocraticJohn Knudson Democratic 4,09237.5% - Votes for listed candidates
- 9,798
- Election day
- November 3, 1970
- District map
- Older district map (1970 to 1971)
Iowa House of Representatives District 40, 1970 to 2024, 1970, every candidate Candidate Party Votes and share Share RepublicanBarton L. SchwiegerWon Republican 5,59857.1% DemocraticFred W. Nolting(incumbent) Democratic 4,20042.9%
- 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 40, election results 1970 to 2024. https://www.electionwrld.com/ia/house/40. 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:40
DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), DIME (ODC-BY), MEDSL 2024 official precinct returnsData as of Oct 28, 2026