Wisconsin State Senate seat · lines in effect since 2024
Wisconsin Senate District 24
A district of about 176,000 people, 25% of adults with a bachelor's degree. It votes R+13.1 relative to the nation for president.
2024 election
Nov 5, 2024- Patrick Testin (R) · won58.7%
- Collin McNamara (D)41.3%
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; the seat changed party 1 time. 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 | Patrick Testin (R) | Collin McNamara (D) | 17.4 |
| Lines first used in 2012 | |||
| 2020 | Patrick Testin (R) | Paul Piotrowski (D) | 12.9 |
| 2016 | Patrick Testin (R)Flip | Julie M. Lassa (D) | 4.7 |
| 2012 | Julie M. Lassa (D) | Scott Kenneth Noble (R) | 13.3 |
| Lines first used in 2002 | |||
| 2008 | Julie M. Lassa (D) | Tom Kimmet (R) | 35.4 |
| 2004 | Julie M. Lassa (D) | Greg Swank (R) | 35.2 |
| Lines first used in 1992 | |||
| 2000 | Kevin W. Shibilski (D) | — | Unopposed |
| 1996 | Kevin W. Shibilski (D) | Wayne Wiedeman (I) | 68.2 |
| 1992 | David Helbach (D) | — | Unopposed |
| Lines first used in 1982 | |||
| 1988 | David Helbach (D) | Leroy G. Breezee (R) | 44.0 |
| 1984 | David Helbach (D) | — | Unopposed |
| Lines first used in 1972 | |||
| 1980 | William A. Bablitch (D) | Robert A. Maland (R) | 31.0 |
| 1976 | William A. Bablitch (D) | Sydney Rouse (R) | 37.6 |
| 1972 | William A. Bablitch (D) | Ray J. Riodan Jr. (R) | 19.2 |
| Lines first used in 1962 | |||
| 1968 | Raymond F. Heinzen (R) | William C. Hansen (D) | 2.0 |
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 24
The state's districts in other chambers that share residents with this one, and the share of District 24'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+13.2 |
| U.S. Senate | R+9.4 |
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 24.
Lower than 88% of seats.
Higher than 91% of seats.
Lower than 72% of seats.
Lower than 69% of seats.
Lower than 59% of seats.
Less dense than 88% 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 2527% college gradsR+13.1Held RDistrict 1
31% college gradsR+20.5Held RDistrict 19
30% college gradsR+26.0Held RDistrict 10
33% college gradsR+20.1Not up in 2026
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