South Dakota State Senate District 31
Tue, Nov 3 · Represented by Randy Deibert Republican · Member list as of Oct 28
One candidate on the printed ballot.
- Last election
- Randy Deibert (Republican) was unopposed, 2024
- On the 2026 ballot
- 1 candidate
More about this race
Candidates on the ballot
Uncontested
One candidate on the printed ballot.
- Randy DeibertIncumbentRepublican
Some names come from filing lists and may not be on the ballot.
Source: vip.sdsos.gov, dated Oct 28
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- Republican
- Independent
- Nonpartisan
- More than one party
- No member listed
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Official results for South Dakota
History (21 elections for this seat)
- Votes for listed candidates
- 10,294
- Election day
- November 5, 2024
- District map
- Older district map (2022 to 2024)
South Dakota Senate District 31, 1984 to 2024, 2024, every candidate Candidate Party Votes and share Share RepublicanRandy DeibertWon Republican 10,294100.0% - Votes for listed candidates
- 8,536
- Election day
- November 8, 2022
- District map
- Older district map (2022)
South Dakota Senate District 31, 1984 to 2024, 2022, every candidate Candidate Party Votes and share Share RepublicanRandy DeibertWon Republican 8,536100.0% - Votes for listed candidates
- 9,911
- Election day
- November 3, 2020
- District map
- Older district map (2012 to 2021)
South Dakota Senate District 31, 1984 to 2024, 2020, every candidate Candidate Party Votes and share Share RepublicanTimothy R. JohnsWon Republican 9,911100.0% - Votes for listed candidates
- 10,672
- Election day
- November 6, 2018
- District map
- Older district map (2012 to 2021)
South Dakota Senate District 31, 1984 to 2024, 2018, every candidate Candidate Party Votes and share Share RepublicanBob EwingWon(incumbent) Republican 6,96265.2% DemocraticSherry Bea Smith Democratic 3,71034.8% - Votes for listed candidates
- 8,681
- Election day
- November 8, 2016
- District map
- Older district map (2012 to 2021)
South Dakota Senate District 31, 1984 to 2024, 2016, every candidate Candidate Party Votes and share Share RepublicanBob EwingWon(incumbent) Republican 8,681100.0% - Votes for listed candidates
- 6,318
- Election day
- November 4, 2014
- District map
- Older district map (2012 to 2021)
South Dakota Senate District 31, 1984 to 2024, 2014, every candidate Candidate Party Votes and share Share RepublicanBob EwingWon(incumbent) Republican 6,318100.0% - Votes for listed candidates
- 7,870
- Election day
- November 6, 2012
- District map
- Older district map (2012 to 2021)
South Dakota Senate District 31, 1984 to 2024, 2012, every candidate Candidate Party Votes and share Share RepublicanBob EwingWon Republican 7,870100.0% - Votes for listed candidates
- 9,794
- Election day
- November 2, 2010
- District map
- Older district map (2002 to 2011)
South Dakota Senate District 31, 1984 to 2024, 2010, every candidate Candidate Party Votes and share Share RepublicanTom NelsonWon(incumbent) Republican 5,82459.5% DemocraticNyla D. Griffith Democratic 3,97040.5% - Votes for listed candidates
- 11,361
- Election day
- November 4, 2008
- District map
- Older district map (2002 to 2011)
South Dakota Senate District 31, 1984 to 2024, 2008, every candidate Candidate Party Votes and share Share RepublicanThomas R. NelsonWon Republican 6,15954.2% DemocraticNyla Griffith Democratic 5,20245.8% - Votes for listed candidates
- 9,703
- Election day
- November 7, 2006
- District map
- Older district map (2002 to 2011)
South Dakota Senate District 31, 1984 to 2024, 2006, every candidate Candidate Party Votes and share Share RepublicanJerry ApaWon(incumbent) Republican 5,98261.6% IndependentKaren Ballert Independent 3,72138.4% - Votes for listed candidates
- 7,851
- Election day
- November 2, 2004
- District map
- Older district map (2002 to 2011)
South Dakota Senate District 31, 1984 to 2024, 2004, every candidate Candidate Party Votes and share Share RepublicanJerry ApaWon(incumbent) Republican 7,851100.0% - Votes for listed candidates
- 6,739
- Election day
- November 5, 2002
- District map
- Older district map (2002 to 2011)
South Dakota Senate District 31, 1984 to 2024, 2002, every candidate Candidate Party Votes and share Share RepublicanJerry ApaWon(incumbent) Republican 6,739100.0% - Votes for listed candidates
- 7,836
- Election day
- November 7, 2000
- District map
- Older district map (1992 to 2001)
South Dakota Senate District 31, 1984 to 2024, 2000, every candidate Candidate Party Votes and share Share RepublicanJerry ApaWon Republican 7,836100.0% - Votes for listed candidates
- 6,081
- Election day
- November 3, 1998
- District map
- Older district map (1992 to 2001)
South Dakota Senate District 31, 1984 to 2024, 1998, every candidate Candidate Party Votes and share Share RepublicanJames B. DunnWon(incumbent) Republican 6,081100.0% - Votes for listed candidates
- 9,442
- Election day
- November 5, 1996
- District map
- Older district map (1992 to 2001)
South Dakota Senate District 31, 1984 to 2024, 1996, every candidate Candidate Party Votes and share Share RepublicanJames B. DunnWon(incumbent) Republican 6,19465.6% DemocraticThomas M. Blair Democratic 3,24834.4% - Votes for listed candidates
- 7,846
- Election day
- November 8, 1994
- District map
- Older district map (1992 to 2001)
South Dakota Senate District 31, 1984 to 2024, 1994, every candidate Candidate Party Votes and share Share RepublicanJames B. DunnWon(incumbent) Republican 7,846100.0% - Votes for listed candidates
- 7,767
- Election day
- November 3, 1992
- District map
- Older district map (1992 to 2001)
South Dakota Senate District 31, 1984 to 2024, 1992, every candidate Candidate Party Votes and share Share RepublicanJames B. DunnWon(incumbent) Republican 7,767100.0% - Votes for listed candidates
- 6,850
- Election day
- November 6, 1990
- District map
- Older district map (1984 to 1991)
South Dakota Senate District 31, 1984 to 2024, 1990, every candidate Candidate Party Votes and share Share RepublicanJames B. DunnWon(incumbent) Republican 6,850100.0% - Votes for listed candidates
- 10,176
- Election day
- November 8, 1988
- District map
- Older district map (1984 to 1991)
South Dakota Senate District 31, 1984 to 2024, 1988, every candidate Candidate Party Votes and share Share RepublicanJames B. DunnWon(incumbent) Republican 6,57164.6% DemocraticJoan A. Conroy Democratic 3,60535.4% - Votes for listed candidates
- 8,355
- Election day
- November 4, 1986
- District map
- Older district map (1984 to 1991)
South Dakota Senate District 31, 1984 to 2024, 1986, every candidate Candidate Party Votes and share Share RepublicanJames B. DunnWon(incumbent) Republican 5,02460.1% DemocraticC. Richard Ruddell Democratic 3,33139.9% - Votes for listed candidates
- 9,274
- Election day
- November 6, 1984
- District map
- Older district map (1984 to 1991)
South Dakota Senate District 31, 1984 to 2024, 1984, every candidate Candidate Party Votes and share Share RepublicanJames B. DunnWon(incumbent) Republican 5,64060.8% DemocraticBill Walsh Democratic 3,63439.2%
- 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
- 1984 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.
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Cite this page
Election Wrld. (2026). South Dakota State Senate District 31, election results 1984 to 2024. https://www.electionwrld.com/sd/senate/31. Retrieved October 31, 2026.
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<iframe src="https://www.electionwrld.com/embed/sd/senate/31" title="South Dakota Senate District 31" 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:sd/sldu:31
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