Staggered Senate
Senators serve four-year terms; the odd-numbered districts are on the ballot in midterm years and the even-numbered ones in presidential years.
Wisconsin › Wisconsin State Senate · November 3, 2026 · Updated Oct 16, 2026
Wisconsin State Senate District 27
Dianne Hesselbein has no major-party opponent.
Dianne Hesselbein has no major-party opponent.
How this race is decided
The candidates
DemocraticIncumbent
Dianne Hesselbein
- Experience
- State legislature
The district
Lean D+54: how much more Democratic or Republican than the nation it votes for president.
Presidential vote
Precinct results re-aggregated to the current district lines.
Who lives here
- Population
- 177,202
- People per km²
- 197
- Adults with a B.A.+
- 62%
- White, no degree
- 29%of adults
- White 77%
- Hispanic 8%
- Black 3%
- Asian 7%
- Other / multiracial 5%
American Community Survey 2020–2024, aggregated from census tracts.
Past results
Results in the same-numbered district; earlier elections may have used different lines.
2024 President Vote in this district
119,520 two-party votes · D+53.4 · D+54.9 vs. the nation✓ Kamala Harris (D)76.7%
Donald Trump (R)23.3%
2022 Earlier district lines
96,481 votes · D+36.0✓ Dianne H Hesselbein (D)68.0%
Robert Relph (R)32.0%
2020 President Vote in this district
155,766 two-party votes · D+57.1 · D+52.6 vs. the nation✓ Joe Biden (D)78.5%
Donald Trump (R)21.5%
2018 Earlier district lines
97,597 votes · D+32.4✓ Jon B Erpenbach (D)66.2%
Casey Helbach (R)33.8%
2016 President Vote in this district
137,030 two-party votes · D+53.5 · D+51.3 vs. the nation✓ Hillary Clinton (D)76.8%
Donald Trump (R)23.2%
2014 Earlier district lines
61,920 votes · Uncontested by the other party✓ Jon B Erpenbach (D)100.0%