South Dakota's 9th legislative district is one of 35 districts in the South Dakota Legislature. Each district is represented by 1 senator and 2 representatives. In the Senate, it has been represented by Republican Brent Hoffman since 2023. In the House, it has been represented by Republicans Bethany Soye since 2021 and Kenneth Teunissen since 2023.
The district is located in the eastern suburbs of Sioux Falls entirely within Minnehaha County, the state's most populous county, in southeastern South Dakota.
South Dakota legislators are elected to two-year terms, with each permitted to serve a maximum of four consecutive terms. Elections are held every even-numbered year.