This was a contested special election after the previous incumbent was appointed to a judgeship.

This was a contested special election after the previous incumbent was appointed to a judgeship.

Ernest Thompson withdrew as the Brown County State's Attorney in 2023 to take a different position. Kaly Winter was appointed to fill the position.

Media reports indicate that Rossow was the State's Attorney in late 2019 and that the previous incumbent had resigned in 2018.

Incumbent Cassie Wendt was unopposed in the 2020 election, won the election, and later resigned. LeEllen McCartney was appointed in 2022 to fill the position.

Alexis Tracy resigned as the Clay County State's Attorney in 2023 for a new position. Michael Smith was appointed to fill the position.

Smith was appointed as the State's Attorney in April 2023 following the resignation of the former incumbent.

Reeves was appointed as the State's Attorney in October 2017 after the previous incumbent was appointed to a judgeship. This was an uncontested special election for the unexpired term.

Bakken became the Interim State's Attorney on August 1, 2024, following the resignation of the previous incumbent.

No one filed a petition to run for the State's Attorney in 2020. Cheryl Bogue resigned from the position of State's Attorney in February 2021. The Corson County Commission then appointed Shane Penfield to fill the position. As of August 2023, Penfield was the State's Attorney in Dewey, Corson, Perkins, and Ziebach counties as well as the city attorney for several municipalities.

No candidate was listed in the primary or general election. Penfield was appointed to the position. Penfield had been previously appointed as the State's Attorney in 2021.

John D. Knight, Independent, was later appointed as the Day County State's Attorney by the Day County Commissioners in 2021.

John D. Knight, Independent, ran in a special election for the two-year unexpired term following their appointment in 2021.

No candidate was listed in the primary or general election. According to the Day County Auditor, Knight was appointed in 2024.

Jared Gass did not finish their four-year term.

Craig Evenson ran for the two-year unexpired term in 2022.

Teree Nesvold withdrew from the ballot on August 2, 2022, prior to the November election for the two-year unexpired term.

Steven Aberle resigned in 2021. Shane Penfield was appointed State's Attorney by the Dewey County Commission on September 22, 2021. As of August 2023, he was the State's Attorney in Dewey, Corson, Perkins, and Ziebach counties as well as the city attorney for several municipalities.

No candidate was listed in the primary or general election.

This was an uncontested special election for the unexpired term.