Wisconsin Senate District 27

Tue, Nov 3 · Represented by Dianne Hesselbein Democratic · Member list as of Oct 28

Dianne HesselbeinDemocratic · Incumbent4 years since first win on file

One candidate on the printed ballot.

Last election: Dianne Hesselbein (Democratic) won by 36.0 points, 2022
On the 2026 ballot: 1 candidate

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Candidates on the ballot

Uncontested

One candidate on the printed ballot.

Dianne HesselbeinIncumbentDemocratic

Source: elections.wi.gov, dated Oct 6

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List every Senate district (33)

State Senate District 1· André Jacque
State Senate District 2· Eric Wimberger
State Senate District 3· Tim Carpenter
State Senate District 4· Dora Drake
State Senate District 5· Rob Hutton
State Senate District 6· LaTonya Johnson
State Senate District 7· Chris Larson
State Senate District 8· Jodi Habush Sinykin
State Senate District 9· Devin LeMahieu
State Senate District 10· Rob Stafsholt
State Senate District 11· Steve Nass
State Senate District 12· Mary Felzkowski
State Senate District 13· John Jagler
State Senate District 14· Sarah Keyeski
State Senate District 15· Mark Spreitzer
State Senate District 16· Melissa Ratcliff
State Senate District 17· Howard Marklein
State Senate District 18· Kristin Dassler-Alfheim
State Senate District 19· Rachael Cabral-Guevara
State Senate District 20· Dan Feyen
State Senate District 21· Van Wanggaard
State Senate District 22· Bob Wirch
State Senate District 23· Jesse James
State Senate District 24· Patrick Testin
State Senate District 25· Romaine Quinn
State Senate District 26· Kelda Roys
State Senate District 27· Dianne Hesselbein
State Senate District 28· Julian Bradley
State Senate District 29· Cory Tomczyk
State Senate District 30· Jamie Wall
State Senate District 31· Jeff Smith
State Senate District 32· Brad Pfaff
State Senate District 33· Chris Kapenga

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Official results for Wisconsin

History (14 elections for this seat)

Votes for listed candidates: 96,534
Election day: November 8, 2022
District map: Older district map (2022)

Wisconsin Senate District 27, 1970 to 2022, 2022, every candidate
Candidate	Party	Votes and share	Share
DemocraticDianne HesselbeinWon	Democratic	65,61868.0%	68.0%
RepublicanRobert Relph	Republican	30,86332.0%	32.0%
Scattered write-ins	Write-in	530.1%	0.1%

Votes for listed candidates: 97,651
Election day: November 6, 2018
District map: Older district map (2012 to 2021)

Wisconsin Senate District 27, 1970 to 2022, 2018, every candidate
Candidate	Party	Votes and share	Share
DemocraticJon B. ErpenbachWon(incumbent)	Democratic	64,60566.2%	66.2%
RepublicanCasey Helbach	Republican	32,99233.8%	33.8%
Scattered write-ins	Write-in	540.1%	0.1%

Votes for listed candidates: 63,500
Election day: November 4, 2014
District map: Older district map (2012 to 2021)

Wisconsin Senate District 27, 1970 to 2022, 2014, every candidate
Candidate	Party	Votes and share	Share
DemocraticJon B. ErpenbachWon(incumbent)	Democratic	61,92097.5%	97.5%
Scattered write-ins	Write-in	1,5802.5%	2.5%

Votes for listed candidates: 83,677
Election day: November 2, 2010
District map: Older district map (2002 to 2011)

Wisconsin Senate District 27, 1970 to 2022, 2010, every candidate
Candidate	Party	Votes and share	Share
DemocraticJon ErpenbachWon(incumbent)	Democratic	51,74261.8%	61.8%
RepublicanKurt Schlicht	Republican	31,90938.1%	38.1%
Scattered write-ins	Write-in	260.0%	0.0%

Wisconsin Senate District 27, 1970 to 2022, 2006, every candidate
Candidate	Party	Votes and share	Share
DemocraticJon ErpenbachWon(incumbent)	Democratic	60,974100.0%	100.0%

Wisconsin Senate District 27, 1970 to 2022, 2002, every candidate
Candidate	Party	Votes and share	Share
DemocraticJon ErpenbachWon(incumbent)	Democratic	46,571100.0%	100.0%

Votes for listed candidates: 62,030
Election day: November 3, 1998
District map: Older district map (1992 to 2001)

Wisconsin Senate District 27, 1970 to 2022, 1998, every candidate
Candidate	Party	Votes and share	Share
DemocraticJon ErpenbachWon	Democratic	35,09556.6%	56.6%
RepublicanNancy Mistele	Republican	26,93543.4%	43.4%

Votes for listed candidates: 54,440
Election day: November 8, 1994
District map: Older district map (1992 to 2001)

Wisconsin Senate District 27, 1970 to 2022, 1994, every candidate
Candidate	Party	Votes and share	Share
DemocraticJoseph S. WinekeWon	Democratic	27,32050.2%	50.2%
RepublicanNancy Mistele	Republican	27,12049.8%	49.8%

Wisconsin Senate District 27, 1970 to 2022, 1990, every candidate
Candidate	Party	Votes and share	Share
DemocraticRussell D. FeingoldWon(incumbent)	Democratic	32,900100.0%	100.0%

Votes for listed candidates: 50,864
Election day: November 4, 1986
District map: Older district map (1984 to 1991)

Wisconsin Senate District 27, 1970 to 2022, 1986, every candidate
Candidate	Party	Votes and share	Share
DemocraticRussell D. FeingoldWon(incumbent)	Democratic	31,81062.5%	62.5%
RepublicanErickson	Republican	19,04737.5%	37.5%
Scattered write-ins	Write-in	70.0%	0.0%

Votes for listed candidates: 46,537
Election day: November 2, 1982
District map: Older district map (1982 to 1983)

Wisconsin Senate District 27, 1970 to 2022, 1982, every candidate
Candidate	Party	Votes and share	Share
DemocraticRussell D. FeingoldWon	Democratic	23,28950.0%	50.0%
RepublicanEverett V. Bidwell(incumbent)	Republican	23,24650.0%	50.0%
Scattered write-ins	Write-in	20.0%	0.0%

Votes for listed candidates: 32,278
Election day: November 7, 1978
District map: Older district map (1972 to 1981)

Wisconsin Senate District 27, 1970 to 2022, 1978, every candidate
Candidate	Party	Votes and share	Share
RepublicanEverett V. BidwellWon(incumbent)	Republican	32,20999.8%	99.8%
Scattered write-ins	Write-in	690.2%	0.2%

Votes for listed candidates: 39,745
Election day: November 4, 1974
District map: Older district map (1972 to 1981)

Wisconsin Senate District 27, 1970 to 2022, 1974, every candidate
Candidate	Party	Votes and share	Share
RepublicanEverett V. BidwellWon(incumbent)	Republican	27,12968.3%	68.3%
DemocraticLeo S. Rodems	Democratic	12,61031.7%	31.7%
Scattered write-ins	Write-in	60.0%	0.0%

Votes for listed candidates: 35,554
Election day: November 3, 1970
District map: Older district map (1964 to 1971)

Wisconsin Senate District 27, 1970 to 2022, 1970, every candidate
Candidate	Party	Votes and share	Share
RepublicanEverett V. BidwellWon	Republican	20,69658.2%	58.2%
DemocraticRobert L. Chickering	Democratic	14,61241.1%	41.1%
IndependentWilliam Osborne Hart	Independent	2460.7%	0.7%

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: 2022.

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Election Wrld. (2026). Wisconsin Senate District 27, election results 1970 to 2022. https://www.electionwrld.com/wi/senate/27. Retrieved October 30, 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; 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:wi/sldu:27

DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), DIME (ODC-BY)Data as of Oct 28, 2026