Wisconsin State Senate seat · lines in effect since 2024
Wisconsin Senate District 20
A district of about 175,000 people, 27% of adults with a bachelor's degree. It votes R+35.1 relative to the nation for president.
2024 election
Nov 5, 2024- Dan Feyen (R) · won70.0%
- Michael Rapp (D)29.9%
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
Where it sits among all 33 seats
Every Wisconsin State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every election for this seat
15 races since 1968. District numbers are redrawn after each census: each group is one set of lines.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| Lines first used in 2024 | |||
| 2024 | Dan Feyen (R) | Michael Rapp (D) | 40.1 |
| Lines first used in 2012 | |||
| 2020 | Duey Stroebel (R) | — | Unopposed |
| 2016 | Duey Stroebel (R) | — | Unopposed |
| 2012 | Glenn Grothman (R) | Tanya Lohr (D) | 37.3 |
| Lines first used in 2002 | |||
| 2008 | Glenn Grothman (R) | Clyde Winter (I) | 60.7 |
| 2004 | Glenn Grothman (R) | — | Unopposed |
| Lines first used in 1992 | |||
| 2000 | Mary E. Panzer (R) | Dale Koski (D) | 46.2 |
| 1996 | Mary E. Panzer (R) | Kevin S. Scheunemann (I) | 76.7 |
| 1992 | Donald K. Stitt (R) | Delmore A. Beaver (D) | 31.3 |
| Lines first used in 1982 | |||
| 1988 | Donald K. Stitt (R) | Rita Liesiefsky (D) | 26.6 |
| 1984 | Donald K. Stitt (R) | Sara Lee Johann (D) | 34.6 |
| Lines first used in 1972 | |||
| 1980 | David W. Opitz (R) | James R. Kempfer (D) | 42.6 |
| 1976 | Ernest C. Keppler (R) | Roberta Peneski (D) | 11.1 |
| 1972 | Ernest C. Keppler (R) | Anthony M. Werner (D) | 7.8 |
| Lines first used in 1962 | |||
| 1968 | Ernest C. Keppler (R) | Henry Staff (I) | 93.6 |
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Districts that overlap District 20
The state's districts in other chambers that share residents with this one, and the share of District 20's area in each.
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2024 | |
|---|---|
| President | R+34.5 |
| U.S. Senate | R+33.6 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 8, 2026, 7:01 PM ET
Who lives here, compared
Grey bars show the spread of all 33 seats. Small marks are other seats in Wisconsin. The black marker is District 20.
Lower than 69% of seats.
Higher than 88% of seats.
Lower than 53% of seats.
Lower than 53% of seats.
Lower than 69% of seats.
Less dense than 53% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 228% college gradsR+27.4Not up in 2026District 19
30% college gradsR+26.0Held RDistrict 11
31% college gradsR+27.8Held RDistrict 13
21% college gradsR+30.8Held R
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET