Idaho State Senate District 21
Tue, Nov 3 · Represented by Treg Bernt Republican · Member list as of Oct 28
Treg BerntRepublican · Incumbent4 years since first win
One candidate on the printed ballot.
- Last election
- Treg Bernt (Republican) won by 48.5 points, 2024
- On the 2026 ballot
- 1 candidate
More about this race
Candidates on the ballot
Uncontested
One candidate on the printed ballot.
- Treg BerntIncumbentRepublican
Source: run.voteidaho.gov, dated Oct 28
All State Senate districts
Select a shape for details. Arrow keys move between shapes.
- Democratic
- Republican
- Independent
- Nonpartisan
- More than one party
- No member listed
Map settings
Vote in Idaho
Trouble voting? Election Protection hotline: 866-OUR-VOTE. A nonpartisan coalition of civil-rights and voting-rights groups, not a government service. 866ourvote.org
History (29 elections for this seat)
- Votes for listed candidates
- 24,555
- Election day
- November 5, 2024
- District map
- Older district map (2022 to 2024)
Idaho Senate District 21, 1968 to 2024, 2024, every candidate Candidate Party Votes and share Share RepublicanTreg BerntWon Republican 18,23374.3% LibertarianMike Long Libertarian 6,32225.8% - Votes for listed candidates
- 15,471
- Election day
- November 8, 2022
- District map
- Older district map (2022)
Idaho Senate District 21, 1968 to 2024, 2022, every candidate Candidate Party Votes and share Share RepublicanTreg BerntWon Republican 12,86183.1% OtherMonica McKinley Other 2,61016.9% - Votes for listed candidates
- 31,104
- Election day
- November 3, 2020
- District map
- Older district map (2012 to 2021)
Idaho Senate District 21, 1968 to 2024, 2020, every candidate Candidate Party Votes and share Share RepublicanRegina BayerWon Republican 19,86963.9% DemocraticDawn Pierce Democratic 11,23536.1% - Votes for listed candidates
- 21,238
- Election day
- November 6, 2018
- District map
- Older district map (2012 to 2021)
Idaho Senate District 21, 1968 to 2024, 2018, every candidate Candidate Party Votes and share Share RepublicanClifford R. BayerWon(incumbent) Republican 12,27557.8% DemocraticDawn C. Pierce Democratic 7,77636.6% IndependentJoe Evans Independent 1,1875.6% - Votes for listed candidates
- 17,462
- Election day
- November 8, 2016
- District map
- Older district map (2012 to 2021)
Idaho Senate District 21, 1968 to 2024, 2016, every candidate Candidate Party Votes and share Share RepublicanClifford R. BayerWon(incumbent) Republican 17,462100.0% - Votes for listed candidates
- 11,246
- Election day
- November 4, 2014
- District map
- Older district map (2012 to 2021)
Idaho Senate District 21, 1968 to 2024, 2014, every candidate Candidate Party Votes and share Share RepublicanClifford R. BayerWon(incumbent) Republican 11,246100.0% - Votes for listed candidates
- 19,836
- Election day
- November 6, 2012
- District map
- Older district map (2012 to 2021)
Idaho Senate District 21, 1968 to 2024, 2012, every candidate Candidate Party Votes and share Share RepublicanClifford R. BayerWon Republican 12,85864.8% DemocraticKirsten Hooker Democratic 6,97835.2% - Votes for listed candidates
- 18,803
- Election day
- November 2, 2010
- District map
- Older district map (2002 to 2011)
Idaho Senate District 21, 1968 to 2024, 2010, every candidate Candidate Party Votes and share Share RepublicanRussell M. FulcherWon(incumbent) Republican 14,06374.8% DemocraticKelly J. Victorine Democratic 4,74025.2% - Votes for listed candidates
- 21,842
- Election day
- November 4, 2008
- District map
- Older district map (2002 to 2011)
Idaho Senate District 21, 1968 to 2024, 2008, every candidate Candidate Party Votes and share Share RepublicanRussell M. FulcherWon(incumbent) Republican 21,842100.0% - Votes for listed candidates
- 13,845
- Election day
- November 7, 2006
- District map
- Older district map (2002 to 2011)
Idaho Senate District 21, 1968 to 2024, 2006, every candidate Candidate Party Votes and share Share RepublicanRussell M. FulcherWon Republican 13,845100.0% - Votes for listed candidates
- 16,687
- Election day
- November 2, 2004
- District map
- Older district map (2002 to 2011)
Idaho Senate District 21, 1968 to 2024, 2004, every candidate Candidate Party Votes and share Share RepublicanJack NobleWon(incumbent) Republican 16,687100.0% - Votes for listed candidates
- 13,078
- Election day
- November 5, 2002
- District map
- Older district map (2002 to 2011)
Idaho Senate District 21, 1968 to 2024, 2002, every candidate Candidate Party Votes and share Share RepublicanJack NobleWon Republican 7,63758.4% DemocraticEileen A. Thornburgh Democratic 5,04238.5% LibertarianValerie Crump Libertarian 3993.0% - Votes for listed candidates
- 10,477
- Election day
- November 7, 2000
- District map
- Older district map (1992 to 2001)
Idaho Senate District 21, 1968 to 2024, 2000, every candidate Candidate Party Votes and share Share DemocraticW. Clinton StennettWon(incumbent) Democratic 10,477100.0% - Votes for listed candidates
- 8,554
- Election day
- November 3, 1998
- District map
- Older district map (1992 to 2001)
Idaho Senate District 21, 1968 to 2024, 1998, every candidate Candidate Party Votes and share Share DemocraticW. Clinton StennettWon(incumbent) Democratic 8,554100.0% - Votes for listed candidates
- 11,456
- Election day
- November 5, 1996
- District map
- Older district map (1992 to 2001)
Idaho Senate District 21, 1968 to 2024, 1996, every candidate Candidate Party Votes and share Share DemocraticW. Clinton StennettWon(incumbent) Democratic 11,456100.0% - Votes for listed candidates
- 12,956
- Election day
- November 8, 1994
- District map
- Older district map (1992 to 2001)
Idaho Senate District 21, 1968 to 2024, 1994, every candidate Candidate Party Votes and share Share DemocraticW. Clinton StennettWon Democratic 7,92561.2% RepublicanJon Mellen Republican 5,03138.8% - Votes for listed candidates
- 14,769
- Election day
- November 3, 1992
- District map
- Older district map (1992 to 2001)
Idaho Senate District 21, 1968 to 2024, 1992, every candidate Candidate Party Votes and share Share DemocraticJohn PeaveyWon(incumbent) Democratic 8,79559.5% RepublicanElaine Martin Republican 5,49737.2% LibertarianJoseph A. Rohner III Libertarian 4773.2% - Votes for listed candidates
- 69,803
- Election day
- November 6, 1990
- District map
- Older district map (1984 to 1991)
Idaho Senate District 21, 1968 to 2024, 1990, every candidate Candidate Party Votes and share Share DemocraticMike BurkettWon(incumbent) Democratic 41,56259.5% RepublicanWilliam F. Ringert Republican 28,24140.5% - Votes for listed candidates
- 86,518
- Election day
- November 8, 1988
- District map
- Older district map (1984 to 1991)
Idaho Senate District 21, 1968 to 2024, 1988, every candidate Candidate Party Votes and share Share DemocraticMike BurkettWon Democratic 46,85254.1% RepublicanJames E. Risch(incumbent) Republican 36,95542.7% LibertarianJack L. Dalton Libertarian 2,7113.1% - Votes for listed candidates
- 79,594
- Election day
- November 4, 1986
- District map
- Older district map (1984 to 1991)
Idaho Senate District 21, 1968 to 2024, 1986, every candidate Candidate Party Votes and share Share RepublicanJames E. RischWon(incumbent) Republican 43,00654.0% DemocraticLarry Larocco Democratic 36,58846.0% - Votes for listed candidates
- 77,608
- Election day
- November 6, 1984
- District map
- Older district map (1984 to 1991)
Idaho Senate District 21, 1968 to 2024, 1984, every candidate Candidate Party Votes and share Share RepublicanJames E. RischWon(incumbent) Republican 52,38667.5% DemocraticDavid Hammerquist Democratic 25,22232.5% - Votes for listed candidates
- 9,248
- Election day
- November 2, 1982
- District map
- Older district map (1982 to 1983)
Idaho Senate District 21, 1968 to 2024, 1982, every candidate Candidate Party Votes and share Share DemocraticJohn PeaveyWon(incumbent) Democratic 4,82452.2% RepublicanEugene Durell Moon Republican 4,42447.8% - Votes for listed candidates
- 12,524
- Election day
- November 4, 1980
- District map
- Older district map (1976 to 1981)
Idaho Senate District 21, 1968 to 2024, 1980, every candidate Candidate Party Votes and share Share DemocraticJohn PeaveyWon Democratic 6,28950.2% RepublicanMaurice O. Ellsworth Republican 6,23549.8% - Votes for listed candidates
- 7,460
- Election day
- November 7, 1978
- District map
- Older district map (1976 to 1981)
Idaho Senate District 21, 1968 to 2024, 1978, every candidate Candidate Party Votes and share Share DemocraticJohn J. BellWon(incumbent) Democratic 3,96453.1% RepublicanMaurice Owens Ellsworth Republican 3,49646.9% - Votes for listed candidates
- 9,801
- Election day
- November 2, 1976
- District map
- Older district map (1976 to 1981)
Idaho Senate District 21, 1968 to 2024, 1976, every candidate Candidate Party Votes and share Share DemocraticJohn J. BellWon Democratic 5,01551.2% RepublicanBarbara R. Fagg Republican 4,78648.8% - Votes for listed candidates
- 5,310
- Election day
- November 4, 1974
- District map
- Older district map (1974 to 1975)
Idaho Senate District 21, 1968 to 2024, 1974, every candidate Candidate Party Votes and share Share RepublicanJohn PeaveyWon(incumbent) Republican 5,310100.0% - Votes for listed candidates
- 8,610
- Election day
- November 7, 1972
- District map
- Older district map (1972 to 1973)
Idaho Senate District 21, 1968 to 2024, 1972, every candidate Candidate Party Votes and share Share RepublicanJohn PeaveyWon(incumbent) Republican 5,24861.0% DemocraticWilliam Whittom Democratic 3,36239.0% - Votes for listed candidates
- 7,853
- Election day
- November 3, 1970
- District map
- Older district map (1966 to 1971)
Idaho Senate District 21, 1968 to 2024, 1970, every candidate Candidate Party Votes and share Share RepublicanJohn PeaveyWon Republican 4,65859.3% DemocraticOscar C. Arstein Democratic 3,19540.7% - Votes for listed candidates
- 9,023
- Election day
- November 5, 1968
- District map
- Older district map (1966 to 1971)
Idaho Senate District 21, 1968 to 2024, 1968, every candidate Candidate Party Votes and share Share RepublicanMary T. BrooksWon(incumbent) Republican 5,93565.8% DemocraticGerald Morgan Democratic 3,08834.2%
- 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 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). Idaho State Senate District 21, election results 1968 to 2024. https://www.electionwrld.com/id/senate/21. Retrieved October 30, 2026.
Embed this seat
<iframe src="https://www.electionwrld.com/embed/id/senate/21" title="Idaho Senate District 21" 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>Paste this into any web page. It shows the seat, its last result and the next election.
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:id/sldu:21
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