See below for an overview of the races to represent all Wisconsin Senate seats up for election in 2024 under the redrawn districts agreed to by Gov. Tony Evers and the GOP-controlled Legislature.
The information will be updated regularly as new announcements are made.
The map graphic was prepared by Marquette University Law School research fellow John Johnson. District performance is based on 2022 top-of the ticket results.
Are we missing a candidate? Has someone already dropped out? Email us at staff@wispolitics.com to help us keep an accurate list of candidates as the Legislature heads toward the filing deadline.
Click here for information on Assembly races.
2nd Senate District
Lawmaker drawn in: None
Lawmaker moving in: Eric Wimberger (R-Green Bay)
Announced candidates: Wimberger, Kelly Peterson (D-De Pere)
District performance: 65.3% Republican
The dynamic: Sen. Rob Cowles, R-GreenBay, has represented the 2nd SD since a 1987 special election, and he announced plans to run for the seat after he was moved into the 30th. But Cowles instead opted not to seek reelection after Wimberger, who was also drawn into the new 30th, decided to move into the 2nd to run there instead. Wimberger said he moved into the 2nd SD because it will allow him to live closer to the family business in Lakewood.
4th Senate District
Lawmaker drawn in: None
Lawmaker moving in: None
Announced candidates: LaKeshia Myers (D-Milwaukee) and Dora Drake (D-Milwaukee)
District performance: 84.6% Democratic
The dynamic: Lena Taylor, D-Milwaukee, resigned from the seat earlier this year to accept an appointment to the Milwaukee County Circuit Court. The guv hasn’t yet called a special election, though both Drake and Myers have indicated they would run in one.
6th Senate District
Lawmaker drawn in: LaTonya Johnson (D-Milwaukee)
Lawmaker moving in: None
Announced candidates: Johnson
District performance: 86% Democratic
8th Senate District
Lawmakers drawn in: Duey Stroebel (R-Saukville), Dan Knodl (R-Germantown)
Lawmaker moving in: None
Announced candidates: Stroebel, Jodi Habush Sinykin (D-Milwaukee), Frank Bryson (D-Thiensville)
District performance: 53% Republican
The dynamic: Knodl, who won a special election last spring for the seat, decided to run for the Assembly after he was paired with Stroebel.
10th Senate District
Lawmaker drawn in: Rob Stafsholt (R-New Richmond)
Lawmaker moving in: None
Announced candidates: Stafsholt
District performance: 61.1% Republican
12th Senate District
Lawmaker drawn in: Mary Felzkowski (R-Tomahawk)
Lawmaker moving in: None
Announced candidates: Felzkowski, Andi Rich (D-Marinette)
District performance: 65.4% Republican
14th Senate District
Lawmaker drawn in: Howard Marklein (R-Spring Green)
Lawmaker moving in: Joan Ballweg (R-Markesan)
Announced candidates: Ballweg, Sarah Keyeski (D-Lodi), Christopher Unterberger (D-Wisconsin Dells)
District performance: 53.3% Democratic
The dynamic: Though he was drawn into the 14th, Marklein represents the 17th SD and is expected to continue in that seat through at least the 2026 election, when he would be up for another term. Ballweg has represented the 14th SD since her election in 2020, but was drawn into the 13th with Sen. John Jagler, R-Watertown. Ballweg announced she’ll move to the new 14th to run for another term. Unterberger told WisPolitics he’s committed to running for the district, but if his campaign feels there’s a better suited Dem to defeat whoever the main Republican candidate is, he would put his support behind them.
16th Senate District
Lawmaker drawn in: None
Lawmaker moving in: None
Announced candidates: Jimmy Anderson (D-Fitchburg), Sambah Baldeh (D-Madison), Melissa Ratcliff (D-Cottage Grove)
District performance: 66.1% Democratic
The dynamic: Sen. Melissa Agard, D-Madison, won the seat in 2020, but was drawn into another district and is running for Dane County exec, opening up this deep blue seat.
18th Senate District
Lawmaker drawn in: None
Lawmaker moving in: None
Announced candidates: Kristin Alfheim (D-Appleton), Joseph Carman (D-Appleton), Anthony Phillips (R-Appleton), Blong Yang (R-Appleton)
District performance: 55.5% Democratic
The dynamic: This new seat runs from Oshkosh to Appleton along Lake Winnebago, creating a top pickup opportunity for Dems.
20th Senate District
Lawmaker drawn in: Dan Feyen (R-Fond du Lac)
Lawmaker moving in: None
Announced candidates: Feyen, Joseph Gamez (D-Hartford), Kraig Sadownikow (R-West Bend), Tim Ramthun (R-Kewaskum)
District performance: 69.4% Republican
22nd Senate District
Lawmaker drawn in: Bob Wirch (D-Somers)
Lawmaker moving in: None
Announced candidates: Wirch
District performance: 55.9% Democratic
24th Senate District
Lawmaker drawn in: Pat Testin (R-Stevens Point)
Lawmaker moving in: None
Announced candidates: Testin, Colin McNamara (D-Stevens Point)
District performance: 57.5% Republican
26th Senate District
Lawmakers drawn in: Kelda Roys (D-Madison), Melissa Agard (D-Madison)
Lawmaker moving in: None
Announced candidates: Roys
District performance: 86.9% Democratic
The dynamic: The pair in this seat was in-name-only, as Agard had already announced plans to leave the Senate and run for Dane County exec.
28th Senate District
Lawmaker drawn in: None
Lawmaker moving in: Julian Bradley (R-Franklin)
Announced candidates: Bradley, Megan Lach (D-Waukesha)
District performance: 64.2% Republican
The dynamic: The new map paired Bradley with Sen. Van Wanggaard (R-Racine) in the new 21st SD that isn’t up until 2026. Bradley announced he will move into the 28th, which is the district number he was elected to in 2020 for his first term in the Senate.
30th Senate District
Lawmakers drawn in: Eric Wimberger (R-Green Bay), André Jacque (R-De Pere), Rob Cowles (R-Green Bay)
Lawmaker moving in:
Announced candidates: Jamie Wall (D-Green Bay), Jim Rafter (R-Green Bay)
District performance: 52.6% Democratic
The dynamic: The new map squeezed all three GOP incumbents into one seat, though Wimberger is running for the 2nd and Cowles is retiring. Jacque, meanwhile, is running for the 8th CD this fall and continues to represent the 1st SD, which he was elected to in 2018.
32nd Senate District
Lawmaker drawn in: Brad Pfaff (D-Onalaska)
Lawmaker moving in:
Announced candidates: Pfaff, Stacey Klein (R-Trempealeau)
District performance: 54.2% Democratic
