The 2022 Wisconsin Senate elections were held on Tuesday, November 8, 2022. 17 of the 33 seats in the Wisconsin State Senate were up for election—the odd-numbered districts. This was the first election to take place after redistricting following the 2020 United States census. This was the only election to take place under the redistricting plan set out in 2022. Before the election, 21 Senate seats were held by Republicans, and 12 seats were held by Democrats. 11 Republican seats and six Democratic seats were up in this election. The primary election took place on August 9, 2022.
Republicans flipped one Democratic-held Senate seat and achieved a two-thirds supermajority, entering the 106th Wisconsin Legislature with 22 of 33 State Senate seats.
Source: https://elections.wi.gov/elections/election-results#accordion-5601
Seats where the margin of victory was under 10%:
Incumbent Republican André Jacque ran for re-election. He defeated attorney Andrea Gage-Michaels by a 19-point margin.
Incumbent Democrat Tim Carpenter ran for re-election. He defeated Republican and perennial candidate Angel Sanchez by a wide margin.
Incumbent Republican Dale Kooyenga declined to run for re-election. Former state legislator Rob Hutton defeated Democrat Jessica Katzenmeyer.
Incumbent Democrat Chris Larson ran for re-election. He defeated Republican Peter Gilbert.
Incumbent Republican Devin LeMahieu ran for re-election unopposed. In the primary election he faced candidates Ruth Villareal and Jeanette Deschene in the primary.
Incumbent Republican Stephen Nass ran for re-election. He defeated Democrat Steven J. Doelder by a 17-point margin.
Incumbent Republican John Jagler ran for re-election unopposed.
Incumbent Democrat Janis Ringhand declined to seek re-election. State legislator Mark Spreitzer defeated Republican Mark Trofimchuck by a wide margin.
Incumbent Republican Howard Marklein ran for re-election. He defeated Democrat Pat Skogen by a wide margin.
Incumbent Republican Roger Roth declined to seek re-election, instead running for Lieutenant governor. State representative Rachael Cabral-Guevara defeated Appleton Common Councilmember Kristin Alfheim by a nine-point margin.
Incumbent Republican Van H. Wanggaard ran for re-election unopposed.
Incumbent Republican Kathy Bernier declined to seek re-election. Republican Jesse James defeated challengers Brian Westrate and Sandra Scholz. James was unopposed in the general election.
Incumbent Democrat Janet Bewley declined to seek re-election. Former Republican legislator Romaine Quinn defeated Democrat Kelly Westlund by a 14-point margin.
Incumbent Democrat Jon Erpenbach declined to seek re-election. Democratic state representative Dianne Hesselbein defeated Republican Robert Relph by a wide margin.
Incumbent Republican Jerry Petrowski declined to seek re-election. Republican Cory Tomczyk defeated Mosinee mayor Brent Jacobson and realtor Jon P. Kaiser in the primary. Tomczyk defeated Democrat Bob Look in the general election by a wide margin.
Incumbent Republican Jeff Smith ran for re-election. He defeated Republican David Estenson by a 0.9% margin.
Incumbent Republican Chris Kapenga ran for re-election unopposed.