The 2021 Wisconsin Spring Election was held in the U.S. state of Wisconsin on April 6, 2021. There was one statewide race—for Superintendent of Public Instruction. Additionally, two special elections occurred for the Wisconsin State Senate and Wisconsin State Assembly, as well as other nonpartisan local and judicial elections. The 2021 Spring primary was held on February 16, 2021.
An additional special election for the 37th Assembly district was held on July 13, 2021.
In the election for Superintendent of Public Instruction, the Democrats' preferred candidate, Jill Underly, prevailed. Republicans, however, won both special elections for the Wisconsin Legislature, and Republicans' preferred candidates won both contested elections for the Wisconsin Court of Appeals.
State elections
Executive
Superintendent of Public Instruction
Incumbent Superintendent of Public Instruction Carolyn Stanford Taylor did not seek election to a full term. She was appointed to the seat by Governor Tony Evers, the previous Superintendent of Public Instruction, to fill the remainder of his term after he was elected Governor of Wisconsin in 2018.
Eight candidates filed petitions by the state deadline to run for election to this seat, of which, seven were approved. The office is nonpartisan, thus all accepted candidates appeared on the primary ballot on February 16, 2021.
Sheila Briggs, assistant state superintendent at the state Department of Public Instruction. Joe Fenrick, Fond du Lac high school science teacher. Troy Gunderson, Viterbo University professor and former superintendent of the School District of West Salem. Shandowlyon (Shawn) Hendricks-Williams, former director of Evers' Milwaukee office and DPI Education Administrative Director of Teacher Education, Professional Development and Licensing. Deborah Kerr, former superintendent of Brown Deer School District. Steve Krull, principal of Milwaukee's Garland Elementary School and former Air Force instructor. Jill Underly, superintendent of Pecatonica School District.
Jill Underly and Deborah Kerr won the most votes in the top-two primary, and advanced to the April 6 general election, which Underly won with 58% of the vote.
| colspan="6" style="text-align:center;background-color: #e9e9e9;"| Nonpartisan Primary, February 16, 2021
| colspan="6" style="text-align:center;background-color: #e9e9e9;"| General Election, April 6, 2021
Legislative
State Senate 13th district special election
A special election was held concurrent with the spring primary and spring general to fill the 13th State Senate seat vacated by the resignation of Scott L. Fitzgerald.
Seven candidates filed petitions by the state deadline to run for election to this seat, of which six were approved, including three Republicans, one Democrat, and two independents. State Representative John Jagler won the Republican primary and went on to win the April special election with 51% of the vote.
State Assembly 89th district special election
A special election was held concurrent with the spring primary and spring general to fill the 89th State Assembly seat vacated by the resignation of John Nygren.
Five candidates filed petitions by the state deadline to run for election to this seat, all were approved, including four Republicans and one Democrat. Elijah Behnke won the Republican primary and went on to win the special election with 63% of the vote.
State Assembly 37th district special election
A special election was held on July 13, 2021, to fill the 37th State Assembly seat vacated by the resignation of John Jagler.
Ten candidates filed petitions by the state deadline to run for this seat, all were approved, including eight Republicans, one Democrat, and one Independent. William Penterman won the June 15 Republican primary and went on to win the special election with 54% of the vote.
Judicial
State Court of Appeals
Three seats on the Wisconsin Court of Appeals were up for election in 2021, two of which were contested. Incumbent Judge Jeffrey O. Davis was defeated. Judge Maxine Aldridge White, appointed by Governor Tony Evers in 2020, was unopposed seeking re-election in District I. In District II, Judge Jeffrey O. Davis, appointed by Governor Tony Evers in 2019, was defeated by municipal judge Shelley Grogan of Muskego. In District III, Wisconsin circuit court judge Gregory B. Gill, Jr., of Outagamie County, defeated attorney Rick Cveykus of Wausau, to succeed retiring Judge Mark Seidl.